PERIODICAL SURVEY REQUIREMENTS - DNV GL · PDF filePERIODICAL SURVEY REQUIREMENTS JANUARY 2001...

RULES FORCLASSIFICATION OF

DET NORSKE VERITAS

Veritasveien 1, N-1322 Høvik, Norway Tel.: +47 67 57 99 00 Fax: +47 67 57 99 11

SHIPS

SHIPS IN OPERATION

PART 7 CHAPTER 2

PERIODICAL SURVEYREQUIREMENTSJANUARY 2001

CONTENTS PAGE

Sec. 1 General Requirements ................................................................................................................ 7Sec. 2 Survey Extent — Main Class ................................................................................................... 18Sec. 3 Survey Extent — Additional Class. Special Service and Type Notations .............................. 29Sec. 4 Survey Extent — Additional Class. Special Equipment and Systems Notations ................... 55

CHANGES IN THE RULES

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General

The present edition of the rules includes additions and amendmentsdecided by the board in December 2000, and supersedes the January2000 edition of the same chapter.

The rule changes come into force 1 July 2001.

This chapter is valid until superseded by a revised chapter. Supple-ments will not be issued except for an updated list of minor amend-ments and corrections presented in Pt.0 Ch.1 Sec.3. Pt.0 Ch.1 isnormally revised in January and July each year.

Revised chapters will be forwarded to all subscribers to the rules.Buyers of reprints are advised to check the updated list of rule chap-ters printed in Pt.0 Ch.1 Sec.1 to ensure that the chapter is current.

Main changes

• Sec.1 General Requirements

— The survey interval for thermal oil heaters has been increasedfrom 1 to 2.5 years.

— Previous items B301 to B309 have been replaced by amendedB301 to B305 to upgrade the PMS survey arrangement.

— Item B502 has been amended and new items B503 to B507 havebeen added to make the requirements more stringent in obtainingthe tailshaft monitoring arrangement, TMON.

— Item C206 has been added in accordance with IACS UR Z10.1,Z10.2 and Z10.3, concerning a survey planning meeting.

— Item D101 has been amended regarding attendance at the surveyplanning meeting.

— Items D102 and D103 have been revised in accordance with therequirements in IACS UR Z10.1, Z10.2 and Z10.3.

— A new item D200 concerning examination of ro-ro ships bow,side and stern doors has been added, implementing the amendedrequirements of IACS UR Z17.

— New items F100 and F200 have been added in accordance the re-quirements in IACS UR Z7 and parts of UR Z10.1, Z10.2 andZ10.3, concerning prompt and thorough repairs to damage asso-ciated with wastage over the allowable limits.

— A new item G100 has been added to include surveys for gas tur-bine maintenance and exchange of components.

• Sec.2 Survey Extent — Main Class

— Item A104 has been expanded on ships that are transverselyframed.

— Additional text has been added to item B203.— Additional text has been added to item B405, in regard to inspec-

tions of Ro-Ro ship's bow, side and stern doors.— Item B602 has been amended to upgrade the PMS survey ar-

rangement.— New items B603 and B604 have been added.— A new item B1100 has been added to include maintenance and

surveys of gas turbines.— In accordance with IACS UR Z7, items C102 and D114 have

been amended indicating that consideration may be given to thewaiving of internal examinations, for tanks of 12 m3 or less.

— Items D103, D104, D114, D117 and Table D1 have been amend-ed and items D106 and D110 have been added. The rest of D100has been renumbered.

— A new item E400, concerning renewal surveys for gas turbines,has been added.

— Items N103 and N204 have been added concerning water jets.

• Sec.3 Survey Extent — Additional Class. Special Service andType Notations

— New items F102 and F103 have been added, concerning close upexamination and the option to reduce or extend the survey, de-pending upon the observed maintenance condition of the hullstructures under survey.

— Item F203 has been expanded to cover examination of piping incargo holds for ships over 15 years.

— Items F204 and F205 have been amended, in accordance with therequirements in IACS UR Z10.1. Z10.2 and Z10.3, concerningthe extent of thickness measurements and the examination ofhatch covers and coamings.

— Previous item F205 has been moved to F500.— Item F300 and Table F1 has been amended in accordance with

IACS UR Z10.2.— Previous item F407 has been revised and moved to F500.— Items F405, F406, new items F407 and F410 and F408 (previous

409) have been amended in accordance with IACS UR Z10.2,concerning close up examination and the option to reduce or ex-tend the survey depending upon the observed maintenance con-dition of the hull structures under survey, and concerning thethorough examination of hatch covers, in regard to testing andthickness measurements.

— Previous item F413 has been revised and moved to F500.— A new item F500 has been added, collecting all requirements

concerning additional requirements for single side skin bulk car-riers.

— New items G102 and G103 have been added to include the extentof the close up examination when the original coating in tanks isfound to be in GOOD condition.

— New items G203 and G209 have been added in accordance withthe requirements in IACS UR Z10.1, for oil tankers over 15 yearsof age, concerning the extent of thickness measurements in bal-last tanks adjacent to cargo holds with heating coils.

— Item G406 has been amended in accordance with IACS URZ10.1 and G408 and G603 have been deleted. Previous G604 toG621 have been renumbered and new G615 and G616 areamended to further clarify the requirement and to include cargopiping on deck and crude oil washing piping.

— New items K102 and K103 have been added to include the extentof the close up examination when the original coating in tanks isfound to be in GOOD condition.

— Amended item K203, new items K215 and K406, amended itemsK613 and K614 have been added in accordance with the en-hanced requirements in IACS UR Z10.3, concerning the extentof thickness measurements, the examination of ballast tanks ad-jacent to cargo holds with heating coils, waiver of testing of bal-last and cargo tanks at the discretion of the surveyor, in watersurveys versus dry docking for ships over 15 years of age. K408and K603 have been deleted and items have been renumbers ac-cordingly.

• Sec.4 Survey Extent — Additional Class. Special Equipmentand Systems Notations

— A new item G200 has been added to include survey extent for in-tegrated computer systems. Previous G200 has been renumberedG300 and items G301 and G302 have been amended and expand-ed.

— A new item J600 has been added to show that Q shall be suffixedto W1 or W1-OC when the qualification assurance system, op-erational procedures and certificates of competence are exam-ined.

— New item O100 has been added to include survey requirementsfor ships with the class notation GAS FUELLED.

Rules for Ships, January 2001Pt.7 Ch.2 Contents –

DET NORSKE VERITAS

Corrections and Clarifications

In addition to the above stated rule amendments, some detected errorshave been corrected, and some clarifications have been made in theexisting rule wording.


DET NORSKE VERITAS

CONTENTS

SEC. 1 GENERAL REQUIREMENTS .......................... 7

A. Survey Intervals and Conditions.........................................7A 100 General ..............................................................................7A 200 Definitions.........................................................................7A 300 Annual surveys..................................................................7A 400 Intermediate surveys .......................................................11A 500 Renewal surveys .............................................................11A 600 Other complete periodical surveys..................................11A 700 Postponement of periodical surveys ...............................11

B. Alternative Survey Arrangements .................................... 11B 100 Continuous surveys .........................................................11B 200 Surveys by the chief engineer ........................................11B 300 Survey arrangement based on an approved planned

maintenance system (PMS).............................................12B 400 Integrated survey programme (ISP) - Hull structures and

equipment........................................................................13B 500 Survey arrangement based on condition monitoring

system..............................................................................14B 600 Surveys of ships out of commission ...............................15

C. Preparation for Survey ..................................................... 15C 100 Application......................................................................15C 200 Survey programme ..........................................................15C 300 Documentation on board .................................................16

D. Procedures for Class Related Services..............................16D 100 Thickness measurements — hull structures ...................16D 200 Examination of ro-ro ships bow, side and stern doors ....16

E. Provisions for Hull Surveys .............................................. 16E 100 General ............................................................................16E 200 Access to structures.........................................................17

F. Repair of Structural Damage ............................................ 17F 100 Definition ........................................................................17F 200 Repairs ............................................................................17

G. Machinery Surveys ............................................................. 17G 100 Gas turbine maintenance and exchange of components .17

SEC. 2 SURVEY EXTENT — MAIN CLASS ............. 18

A. Definitions............................................................................18A 100 Definitions.......................................................................18

B. Annual Survey..................................................................... 18B 100 Survey extent...................................................................18B 200 Hull structures and equipment ........................................18B 300 Safety construction..........................................................19B 400 Openings and closing appliances ....................................19B 500 Load line marks...............................................................19B 600 Machinery and safety systems ........................................19B 700 Fire protection arrangement ...........................................19B 800 Safety equipment.............................................................20B 900 Pollution prevention, all ships.........................................20B 1000 Noxious liquid substances, NLS (if applicable)..............20B 1100 Gas turbines.....................................................................20

C. Intermediate Survey ...........................................................21C 100 Application and survey extent.........................................21C 200 Ships up to 5 years old ....................................................21C 300 Ships more than 5 years of age but not exceeding

10 years ...........................................................................21C 400 Ships more than 10 years of age .....................................21C 500 Pollution prevention, all ships.........................................21C 600 Noxious liquid substances, NLS (if applicable)..............21

D. Renewal Survey — Hull Structures and Equipment .....21D 100 All vessels .......................................................................21D 200 Ships more than 5 years of age (normally for the second

renewal survey and later) ................................................23

E. Renewal Survey — Machinery and Safety Systems .......23E 100 General ............................................................................23E 200 Electrical installations .....................................................23E 300 Instrumentation and automation......................................24E 400 Gas turbines.....................................................................24

F. Safety Construction ............................................................24F 100 Renewal survey ...............................................................24

G. Opening and Closing Appliances, and Load LineMarks .................................................................................. 24

G 100 Renewal survey ...............................................................24

H. Pollution Prevention, All Ships..........................................24H 100 Renewal survey ...............................................................24

I. Noxious Liquid Substances, NLS ...................................... 25I 100 Renewal survey ...............................................................25

J. Bottom Survey.....................................................................26J 100 Survey extent...................................................................26J 200 Survey methods and conditions ......................................26J 300 Survey details ..................................................................26

K. Tailshaft Survey ................................................................. 26K 100 Renewal survey ...............................................................26K 200 Intermediate survey.........................................................26K 300 Tailshaft condition monitoring survey arrangement .......27

L. Boiler and Steam Heated Steam Generator Survey ........27L 100 Renewal survey ...............................................................27

M. Thermal Oil Heater Survey ............................................... 27M 100 Renewal survey ...............................................................27

N. Thrusters for Propulsion....................................................27N 100 Definitions.......................................................................27N 200 Extent of survey and testing............................................27

O. Radio Communication Equipment ...................................27O 100 Application......................................................................27O 200 Radio safety, GMDSS, renewal survey ..........................27

P. Safety Equipment, Renewal Survey..................................28P 100 Application......................................................................28P 200 Fire safety, lifesaving and navigation equipment ...........28

SEC. 3 SURVEY EXTENT — ADDITIONAL CLASS.SPECIAL SERVICE AND TYPENOTATIONS ..................................................... 29

A. Passenger Ships .................................................................. 29A 100 Application......................................................................29A 200 Annual survey .................................................................29A 300 Bottom survey .................................................................29A 400 Lightweight survey .........................................................29

B. Container Carriers .............................................................29B 100 Application......................................................................29B 200 Annual survey .................................................................29

C. Car Carriers........................................................................29C 100 Application......................................................................29C 200 Annual survey .................................................................29

D. Movable Car Decks ............................................................29D 100 Application......................................................................29D 200 Annual survey .................................................................29

E. Arrangement for Carriage of Motor Vehicles with Fuel intheir Tanks for their own Propulsion ............................... 30

E 100 Application......................................................................30E 200 Annual survey .................................................................30


DET NORSKE VERITAS

F. Dry Bulk Cargo Ships ........................................................30F 100 Application......................................................................30F 200 Annual survey .................................................................30F 300 Intermediate survey.........................................................31F 400 Complete periodical survey ............................................31F 500 Additional requirements for single side skin bulk

carriers.............................................................................35

G. Oil Carriers..........................................................................36G 100 Application......................................................................36G 200 Annual survey (cargo containment) ...............................36G 300 Annual survey (oil pollution prevention)........................37G 400 Intermediate survey (cargo containment) .......................37G 500 Intermediate survey (oil pollution prevention) ...............37G 600 Complete periodical survey (cargo containment) ...........37G 700 Complete periodical survey (oil pollution prevention) ...38

H. Inert Gas Plant ....................................................................41H 100 Application......................................................................41H 200 Complete periodical survey ............................................41

I. Protected Slop Tank ...........................................................41I 100 Application......................................................................41I 200 Complete periodical survey ............................................41

J. Offshore Bow Loading Arrangements ..............................41J 100 Application......................................................................41J 200 Complete periodical survey ............................................41

K. Chemical Carriers ..............................................................42K 100 Application......................................................................42K 200 Annual survey (cargo containment) ................................42K 300 Annual survey (IMO Chemical Code) ............................42K 400 Intermediate survey (cargo containment) .......................42K 500 Intermediate survey (IMO Chemical Code)....................43K 600 Complete periodical survey (cargo containment) ...........43K 700 Complete periodical survey (IMO Chemical Code) .......44

L. Liquefied Gas Carriers ......................................................46L 100 Application......................................................................46L 200 Annual survey (cargo systems) .......................................46L 300 Annual survey (IMO Gas Code) .....................................47L 400 Intermediate survey (cargo systems)...............................47L 500 Intermediate survey (IMO Gas Code).............................48L 600 Complete periodical survey (cargo systems) ..................48L 700 Complete periodical survey (IMO Gas Code) ................49

M. Fire Fighters ........................................................................49M 100 Application......................................................................49M 200 Class notation Fire Fighter I.........................................49M 300 Class notation Fire Fighter II........................................49M 400 Class notation Fire Fighter III.......................................49

N. Well Stimulation Vessels ....................................................49N 100 Application......................................................................49N 200 Annual survey .................................................................49N 300 Complete periodical survey ............................................50

O. Arrangements for Carriage of Low Flashpoint Liquids .50O 100 Application......................................................................50O 200 Annual survey .................................................................50O 300 Complete periodical survey ............................................50

P. Reception System for Recovered Oil.................................50P 100 Application......................................................................50P 200 Complete periodical survey ............................................50

Q. Pusher and Pusher/Barge Combinations .........................50Q 100 Application......................................................................50Q 200 Complete periodical survey ............................................51

R. Oil Production Vessels ........................................................51R 100 Application......................................................................51R 200 Survey arrangement ........................................................51R 300 Annual survey .................................................................51R 400 Complete periodical survey ............................................51

S. Ships and Plants for Refrigerated Cargoes and ControlledAtmosphere .........................................................................51

S 100 Application......................................................................51S 200 Annual survey .................................................................52

S 300 Complete periodical survey ............................................52S 400 Survey in loading port, upon request ..............................53

T. Dangerous Goods ............................................................... 53T 100 Application......................................................................53T 200 Complete periodical survey, compulsory requirements..53

U. Ro-Ro Ships ........................................................................ 53U 100 Application......................................................................53U 200 Annual survey .................................................................53

V. Crane Vessels ...................................................................... 53V 100 Application......................................................................53V 200 Annual survey .................................................................53V 300 Complete periodical survey ............................................53

W.Tanker for Potable Water ................................................. 53W 100 Application......................................................................53W 200 Complete periodical survey ............................................53

X. Cable Laying Vessels ......................................................... 53X 100 Application......................................................................53X 200 Annual survey .................................................................53X 300 Complete periodical survey ............................................54

SEC. 4 SURVEY EXTENT — ADDITIONAL CLASS.SPECIAL EQUIPMENT AND SYSTEMSNOTATIONS ...................................................... 55

A. Helicopter Deck ................................................................. 55A 100 Application......................................................................55A 200 Complete periodical survey ............................................55

B. Shipboard Crane ................................................................ 55B 100 Application......................................................................55B 200 Annual survey .................................................................55B 300 Complete periodical survey ............................................55

C. Diving Systems.................................................................... 55C 100 Application......................................................................55C 200 Annual survey .................................................................55C 300 Intermediate survey.........................................................55C 400 Complete periodical survey ............................................56

D. De-icing or anti-icing Systems........................................... 56D 100 Application......................................................................56D 200 Annual survey .................................................................56

E. Periodically Unattended Machinery Space and MachineryCentralized Operated......................................................... 56

E 100 Application......................................................................56E 200 Annual survey .................................................................56E 300 Complete periodical survey ............................................56

F. Additional Fire Protection................................................. 56F 100 Application......................................................................56F 200 All F-class notations .......................................................56F 300 Class notation F-A ..........................................................57F 400 Class notation F-M..........................................................57F 500 Class notation F-C ..........................................................57F 600 Class notation F-AM .......................................................57F 700 Class notation F ..............................................................57

G. Integrated Computer Systems .......................................... 57G 100 Application......................................................................57G 200 General ............................................................................57G 300 Complete periodical survey ............................................57

H. Centralised Cargo Control for Liquid Cargoes .............. 57H 100 Application......................................................................57H 200 Complete periodical survey ............................................57

I. Dynamic Positioning System ............................................. 58I 100 Application......................................................................58I 200 Complete periodical survey ............................................58

J. Nautical Safety.................................................................... 58J 100 Application......................................................................58J 200 General ............................................................................58J 300 Class notation NAUT-C .................................................58J 400 Class notation W1-OC ...................................................58


DET NORSKE VERITAS

J 500 Class notation W1 ...........................................................59J 600 Class notations W1-Q and W1-OC-Q ...........................59J 700 Class notation NAUT-B..................................................59J 800 Class notation NAUT-A..................................................59

K. Hull Monitoring System..................................................... 59K 100 Application.....................................................................59K 200 General ............................................................................59K 300 Annual survey .................................................................59

L. Vapour Control Systems .................................................... 59L 100 Application......................................................................59L 200 Complete periodical survey ............................................59

M. Redundant Propulsion ....................................................... 60M 100 Application......................................................................60M 200 Complete periodical survey ............................................60

N. Clean Ships.......................................................................... 60N 100 Application......................................................................60N 200 Annual surveys................................................................60

O. Gas Fuelled Engine Installations....................................... 60O 100 Application......................................................................60O 200 Annual survey .................................................................60O 300 Intermediate survey.........................................................60O 400 Complete periodical survey ............................................61

Rules for Ships, January 2001Pt.7 Ch.2 Sec.1 –

DET NORSKE VERITAS

SECTION 1GENERAL REQUIREMENTS

A. Survey Intervals and Conditions

A 100 General

101 All ships are to be subjected to periodical surveys to as-certain the condition of the structure, machinery installations,equipment and appliances. Periodical surveys will in generalbelong to one of the following categories:

— annual surveys— intermediate surveys— renewal surveys— other complete periodical surveys.

The extent of surveys for main and additional class notationsare given in Sec.2, Sec.3 and Sec.4. The surveys are, as mini-mum, to be carried out in accordance with the referred rules inorder to confirm that the hull, machinery, equipment and appli-ances comply with applicable requirements, and will remain insatisfactory condition provided the assumptions stated in Pt.1Ch.1 Sec.1 B400 are adhered to.

In cases where compliance with applicable rules can not be sat-isfactorily confirmed based on extent of surveys as given,more comprehensive examination and/or testing may, upon thesurveyor's discretion, be required.

102 In cases where the Administration of a flag state per-forms surveys of the ship and/or its components and equipmentin accordance with the rule requirements, consideration will begiven to the acceptance of this control as basis for retention ofclass.

103 Notwithstanding the general implication of 102, forships trading with statutory certificates issued by the relevantnational authority and where the Society is not authorised tocarry out surveys, the Society is upon its own discretion, to car-ry out a general survey with respect to these certificates, in or-der to verify compliance with the rules.

The extent of this survey will be decided upon in each separatecase.

104 In cases where the Administration of the flag state hasgiven dispensation from any requirements in the InternationalMaritime Standards, the Society may upon its own discretionaccept their decisions as basis for retention of class.

105 The due date of a periodical survey will be establisheddepending on the survey interval, measured from one of thefollowing events, whichever is relevant:

— the date of class assignment— the date of commissioning— the due date of the previous corresponding survey— the date of completion of the previous corresponding sur-

vey.

106 Surveys and survey intervals related to class notationsare given in Table A1 and A2 for main class and additionalclass respectively.

107 Ships with additional class for which there are no specif-ic survey requirements in this chapter, are to have the equip-ment and/or constructions related to this additional classexamined to the surveyor's satisfaction at every renewal surveyfor main character of class.

A 200 Definitions

201 Convention ship is a ship for which the requirements inthe international conventions apply. The conventions covered

by these rules are applicable with regard to size and type ofship engaged in international voyages as follows:

ICLL For cargo and passenger ships above 24 m.

SOLAS: Safety construction, for cargo ships above 500gross tonnage.Safety equipment, for cargo ships above 500gross tonnage.Radio communication, for cargo ships above300 gross tonnage.All passenger ships.

MARPOL: Pollution prevention, tanker for oil, for shipsabove 150 gross tonnage.Pollution prevention for all other ships above400 gross tonnage.

202 International voyage means a voyage from a country towhich the respective international convention applies to a portoutside such country, or conversely.

203 Passenger ship is a ship which carries more than 12 pas-sengers.

Passenger is every person other than:

— the master and the members of the crew or other personsemployed or engaged in any capacity onboard a ship onthe business of that ship

— a child under one year of age.

204 Cargo ship is any ship which is not a passenger ship.

A 300 Annual surveys

301 Annual surveys are normally visual examinations to as-certain the general condition of the ship or relevant item. Amore thorough annual survey may be specified for particularstructures, machinery installations or equipment due to conse-quences of failure or age.

302 Annual surveys may unless otherwise stated be carriedout within 3 months on either side of the due date.

303 Annual survey is to be carried out concurrently with re-newal - or complete periodical surveys.

304 Satisfactory completion of annual surveys for maincharacter of class and for oil tankers, chemical tankers, lique-fied gas tankers, dry bulk cargo ships and for ships and plantsfor refrigerated cargoes, as applicable, will be confirmed byendorsement on the classification certificate.

305 Surveys completed prior to the specified period, i.e.more than 3 months before due date, may be accepted. In suchcases the anniversary date on the classification certificate to beadvanced to correspond to a date not more than 3 months laterthan the survey completion date.

Subsequent surveys are to be carried out at prescribed intervalsusing the new anniversary date.

Expiry date of the classification certificate may remain un-changed, in which case one or more surveys may be requiredso that the prescribed survey intervals are not exceeded.


DET NORSKE VERITAS

Fig. 1Survey time windows

Table A1 Periodical Surveys, Main Class. (For survey extent, see Sec.2)Maincharacterof class

SurveySurvey in-

terval,years

Survey time windows, see Fig. 1 Remarks

WB (months) WA (months)

1A1 Hull, machinery and equipment, renewal 5 3 See 7001A2 Hull, machinery and equipment, renewal 3 3 See 7001A1/1A2 Hull, machinery and equipment, annual 1 3 3

1A1 Hull, machinery and equipment, interme-diate 2.5 See 400 See 400

1A1 Bottom 2.5 6 6, see however702

The outside of the ship’s bottomand related items are to be sur-veyed at least on two occasions inany five year period. The intervalbetween two subsequent surveysis not to exceed 36 months.To be carried out concurrentlywith renewal survey.For passenger ships, see TableA2.

For light craft, see separate rules.

1A2 Bottom 1 3 3 To be carried out concurrentlywith renewal survey.

1A1/1A2

Tailshaft with continuous corrosion re-sistant metallic liner or shaft of corrosionresistant material or shaft with speciallyapproved protection arrangement

5 6 6

Tailshaft with approved oil sealing glands 5 6 6

May be extended to 10 years pro-vided that an intermediate surveyis carried out after 5 years as giv-en in Sec.2 K200 and with satis-factory result.The Society will not require anyspecific time interval betweencomplete tailshaft syrveys, pro-vided a tailshaft condition moni-toring survey arrangement(TMON) has been granted (seeB500).

Tailshaft of non-corrosion resistant mate-rial without continuous liner or approvedoil box

2.5 6 6

1A1/1A2 Thruster for propulsion, intermediate 2.5 6 61A1/1A2 Thruster for propulsion, complete 5 6 6

1A1/1A2Main boilers, less than 8 years old 2.5 6 6Watertube main boilers, more than 8 yearsold (2 or more boilers for propulsion) 2.5 6 6

1A1/1A2

Watertube main boilers, more than 8 yearsold (1 boiler for propulsion) 1 3 3

Smoketube main boilers, more than 8years old 1 3 3

1A1/1A2Auxiliary boilers 2.5 6 6Steam heated steam generators 2.5 6 6

1A1/1A2 Thermal oil heaters 2.5 6 6


DET NORSKE VERITAS

Table A2 Periodical Surveys, Additional Class. (For survey extent, see Sec.3 and Sec.4, Ch.5 and Ch.8)

Additional classnotation Survey of

Surveyinterval,

years

Survey time windows, seeFig. 1

RemarksWB

(months)WA

(months)

Bulk Carrier ESPOre Carrier ESP

Dry bulk cargo ships, annual 1 3 3 To be carried out concurrently withthe annual, intermediate or renewalsurvey for main class as applicable.The survey also covers requirementsto safety construction.

Dry bulk cargo ships,intermediate 2.5 See 400 See 400

Dry bulk cargo ships, completeperiodical 5 3 See 700

Tanker for Oil ESPTanker for OilProducts ESP

Oil Carriers, annual 1 3 3 To be carried out concurrently withthe annual, intermediate or renewalsurvey for main class as applicable.The survey also covers requirementsto safety construction.

Oil Carriers, intermediate 2.5 See 400 See 400

Oil Carriers, completeperiodical 5 3 See 700

Pollution prevention, annual 1 3 3Pollution prevention,intermediate 2.5 6 6

Pollution prevention, complete 5

Tanker forChemicals ESPTanker for C ESP

Tanker for chemicals, annual 1 3 3 To be carried out concurrently withthe annual, intermediate or renewalsurvey for main class as applicable.The survey also covers requirementsto safety construction.

Tanker for chemicals,intermediate 2.5 See 400 See 400

Tanker for chemicals, completeperiodical 5 3 See 700

IMO Chemical Code, annual 1 3 3IMO Chemical Code, interme-diate 2.5 6 6

IMO Chemical Code, complete 5

Tanker for LiquefiedGas

Tanker for liquefied gas, annual 1 3 3 To be carried out concurrently withthe annual, intermediate or renewalsurvey for main class as applicable.The survey also covers requirementsto safety construction.

Tanker for liquefied gas,intermediate 2.5 See 400 See 400

Tanker for liquefied gas,complete periodical 5 3 See 700

IMO Gas Code, annual 1 3 3IMO Gas Code, intermediate 2.5 6 6IMO Gas Code, complete 5

Tanker for PotableWater

Tanker for potable water, com-plete periodical 5 3 See 700

Oil ProductionVesselOil Production and/or Storage Vessel

Oil production vessel, annual 1 3 3 To be carried out concurrently withthe annual survey for main class.

Oil production vessel, completeperiodical 5 3 See 700 To be carried out concurrently with

the renewal survey for main class.

DSV

Diving system, annual 1 3 3Diving system, intermediate 2.5 6 6Diving system, complete peri-odical 5 3 3

Reefer, RM, RMContainer, KMCCA

Cargo refrigerating plant, annu-al 1 3 3 To be carried out concurrently with

the annual survey for main class.Cargo refrigerating plant, com-plete periodical 5 3 See 700 To be carried out concurrently with

the renewal survey for main class.

E0, ECO

Periodically unattended ma-chinery space, annual 1 3 3

Periodically unattended ma-chinery space, completeperiodical

5 3 3

NAUT-C Nautical safety, bridge design 5 6 6NAUT-OCNAUT-AWNAUT-ANAUT-B

Nautical safety, bridge design,instrumentation, manoeuvring,operational procedures

2.5 6 6

ICS Integrated computer systems 2.5 6 6AUTS, AUT, AUTR,AUTRO Dynamic positioning system 2.5 6 6

F-AMC Additional fire protection 2.5 6 6Fire Fighter Fire fighters 2.5 6 6INERT Inert gas installation 2.5 6 6


DET NORSKE VERITAS

PST Protected slop tank 2.5 6 6

OILREC Reception system for recoveredoil 2.5 6 6

CRANE,Crane Vessel

Shipboard crane, annual 1 3 3 To be carried out concurrently withthe annual survey for main class.

Shipboard crane, complete peri-odical 5 3 See 700

HELDK Helicopter deck 5 3 See 700 To be carried out concurrently withthe renewal survey for main class.

Passenger Ship,Car Ferry A (or B),Train Ferry A (or B)or Car and TrainFerry A (or B)

Passenger ships,ferries

annual 1 3 3

bottomsurvey 1 3 3

At least 2 surveys are to be carried outin dry dock within each 5 year periodof the classification certificate, pro-vided there shall never be more than36 months between two surveys in drydock. The other surveys may be car-ried out with the ship afloat.

lightweightsurvey 5 3 See 700

Car Carrier Car carriers 1 3 3

PETArrangement for carriage ofmotor vehicles with fuel in theirtanks

1 3 3

MCDK Movable car decks 1 3 3Container Carrier Container carriers 1 3 3

Well StimulationVessel

Well stimulation vessels,annual 1 3 3

Well stimulation vessels, com-plete periodical 5 3 3

LFL or LFL*

Arrangements for carriage oflow flashpoint liquids, annual 1 3 3 To be carried out concurrently with

the annual survey for main class.Arrangements for carriage oflow flashpoint liquids, completeperiodical

5 3 3

Pusher and Pusher/Barge Unit

Pusher and pusher/barge combi-nations 5 3 See 700 To be carried out concurrently with

the renewal survey for main class.DEICEDEICE/C De-icing or anti-icing systems 1 3 3

CCO Centralised cargo control 5 3 3BOW LOADING Bow loading arrangement 1 3 3

POSMOOR

Position mooring equipment,annual 1 3 3

For survey extent, see OffshoreStandard DNV-OS-E301

Position mooring equipment,intermediate 2.5 6 6

Position mooring equipment,complete periodical 5 3 3

DG-PDG-B Dangerous goods, complete 5 3 See 700

VCS-1VCS-1BVCS-2VCS-2BVCS-3

Vapour Control Systems

*)5*)5*)

3 See 700

To be carried out concurrently withthe renewal survey for main class.

*) No specific survey items. Completeperiodical survey considered coveredby renewal survey for main class.

OPP-FAdditional oil pollution preven-tion measures for fuel oil sys-tems

*) 3 See 700 see VCS-1

HMON-1 HMON-2 Hull monitoring system 1 3 See 700CLEANCLEAN DESIGN Environment class, annual 1 3 3 To be carried out concurrently with

the annual survey for main class.

Table A2 Periodical Surveys, Additional Class. (For survey extent, see Sec.3 and Sec.4, Ch.5 and Ch.8) (Continued)


Surveyinterval,

years


RemarksWB

(months)WA

(months)


DET NORSKE VERITAS

A 400 Intermediate surveys

401 Intermediate surveys are to include visual examinationsof hull structures, machinery and electrical installations andequipment in order to ascertain that the vessel remains in com-pliance with the rules.

Tests are specified for particular items due to consequence offailure or age.

402 Intermediate surveys are unless otherwise stated to becarried out at the second or third annual survey after the cred-ited date of the renewal survey. Parts of the intermediate sur-veys which are additional to the requirements of the annualsurveys may be surveyed either at or between the second orthird annual survey.

403 Satisfactory completion of intermediate surveys of maincharacter of class and for oil tankers, chemical tankers and liq-uefied gas tankers, as applicable, will be confirmed by en-dorsement on the classification certificate.

A 500 Renewal surveys

501 Renewal surveys are major surveys of hull structures,machinery installations and equipment. Renewal surveys areto include visual examinations, measurements and tests in or-der to confirm that the ship complies with the relevant rule re-quirements and is in satisfactorily maintained condition for theintended service.

502 Renewal surveys for hull, machinery installations andequipment are to be carried out at 5-yearly intervals for shipswith main class 1A1 and at 3-yearly intervals for ships withmain class 1A2.

503 The Society may accept that renewal surveys for hull,machinery installations and equipment and complete periodi-cal surveys of cargo containment systems for oil tankers,chemical tankers, liquefied gas tankers, dry bulk cargo shipsand plants for refrigerated cargoes are commenced concurrent-ly with the fourth annual survey. For surveys commenced priorto the time range for the fourth annual survey, however, sur-veys are to be completed not later than 12 months after thecommencement.

504 Possible repairs are normally to be carried out before therenewal surveys as given in 501 are regarded as completed andnot later than the expiry date of the classification certificate in-cluding possible postponement granted as given in 700. TheSociety may accept that minor deficiencies are rectified withina specified time limit not exceeding 5 months after expiry dateof the classification certificate including possible postpone-ment as given in 700.

A 600 Other complete periodical surveys

601 Examples of complete periodical surveys are:

— surveys at 1, 2.5 or 5 year intervals for additional class no-tations

— surveys at 2.5 year intervals for boilers— annual surveys for radio communication

— surveys at 2 year intervals for safety equipment— surveys at 1, 2.5 and 5 year intervals of safety construc-

tion, pollution prevention, noxious liquid substances andchemicals and gas codes

— surveys at 1 and 5 year intervals for opening and closingappliances and load line marks.

A 700 Postponement of periodical surveys

701 Except for annual and intermediate hull surveys, the So-ciety may accept to postpone periodical surveys upon consid-eration in each separate case. If postponement is granted, acondition of class (CC) will be issued giving the time limit forthe postponement period.

No postponement will be given for conditions of class relatedto overdue continuous machinery and/or hull survey items.

702 Upon the owner's written request an extension of the va-lidity of the certificate by maximum 3 months may be grantedin exceptional cases. Such request must be received by the So-ciety prior to the expiry date of the classification certificate.

B. Alternative Survey Arrangements

B 100 Continuous surveys

101 The Society may, upon request from the owners, as analternative to the renewal surveys, accept continuous surveyson the condition that the items are normally surveyed at inter-vals not exceeding 5 years for ships with main character ofclass 1A1 and 3 years for ships with main character of class1A2.

However, surveys carried out 6 months or less before their duedate will be given a correspondingly longer interval during thenext cycle.

102 Continuous hull survey may be accepted for passengerships, container carriers, ro-ro ships and liquefied gas carriers.The applicable ship types may be recognized if an additionalclass notation as listed below, has been assigned:

Passenger ShipCar FerryTrain FerryTanker for Liquefied GasContainer CarrierRo/Ro

103 Continuous machinery surveys may be accepted for allvessels with main character of class 1A1 or 1A2.

B 200 Surveys by the chief engineer

201 The Society may, upon request from the owners, acceptthat continuous machinery surveys, subject to the provisions of202 to 205, may be carried out by the person in charge of themachinery department (chief engineer). The conditions forgranting this type of survey arrangement will normally be:

SBMSafety and environmental pro-tection (SEP) management sys-tem

5 3 See 700

NAUTICUS(Propulsion)

Propulsion arrangement, annual 1 3 3

See Ch.8 Sec.1 D100Propulsion arrangement, inter-mediate 2.5 6 6

Propulsion arrangement, com-plete periodical 5 3 See 700

Table A2 Periodical Surveys, Additional Class. (For survey extent, see Sec.3 and Sec.4, Ch.5 and Ch.8) (Continued)


Surveyinterval,

years


RemarksWB

(months)WA

(months)


DET NORSKE VERITAS

— the owner (or managing owner) must confirm the requiredqualifications of the chief engineer

— the person has sailed a minimum of 3 years as chief engi-neer with the relevant national certificate, or alternatively

— the person is presently sailing as a chief engineer with therelevant national certificate and has been employed withthe owner (or managing owner) for at least 3 years. Chiefengineers previously approved by the Society need not ful-fil the latter requirement.

Upon acceptance, a chief engineer authorisation letter will beissued by the Society. On request, the authorisation letter is tobe presented to surveyors of the Society.

202 All surveys taking place at ports where the Society isrepresented are to be carried out by surveyors of the Society.

203 Half of all items covered by the continuous machinerysurvey scheme, of which there are more than one, may be sur-veyed by the chief engineer (i.e. the chief engineer may surveyhalf of all identical items in one five-year survey cycle).

Auxiliary diesel engines and turbines may wholly be surveyedby the chief engineer. Only a test run including testing of safetyfunctions in the presence of the surveyor will normally be re-quired.

204 It is a condition that all surveys carried out under super-vision of the chief engineer are recorded in the engine log bookand relevant extracts given to the first attending surveyor. Thesurveyor may, if he finds it necessary, require a resurvey of theparts in question.

205 Generator parallel operation, generator load test, andtesting of protection devices for generators and switchboardsare to be witnessed by a surveyor. See also Sec.2 E204.

B 300 Survey arrangement based on an approvedplanned maintenance system (PMS)

301 A survey arrangement based on a planned maintenancesystem (PMS) is an alternative to the continuous machinerysurvey (CMS). Such survey arrangement is operated under thefollowing conditions:

1) The planned maintenance system is to be computer based.

Guidance note:If the system is centrally operated with the computer ashore, thiscan be accepted provided that implementation survey and annualsurvey are carried out both at the location from where the systemis operated, and onboard.

---e-n-d---of---G-u-i-d-a-n-c-e---n-o-t-e---

2) The ship is to be manned by chief engineers who are famil-iar with the system. A chief engineer approved by the So-ciety shall be onboard at least 50% of the time.Requirements for approval of chief engineers are given in201.

3) The planned maintenance system shall be approved (see302).

4) The manager or operator shall have established a plannedmaintenance system that includes at least all items andsystems that are covered by the continuous machinery sur-vey (CMS) scheme.

5) Maintenance job descriptions and intervals are to be basedon manufacturer’s recommendations. Experience mayshow that intervals need to be adjusted, in these cases doc-umentation is required if intervals are to be extended.

6) All components in the CMS scheme are to be clearly iden-tified with the CMS code in the system.

7) The system shall be able to produce a maintenance historyreport of all main overhauls carried out for a specific timeperiod, see 303.

8) Tthe maintenance may be based on calendar or runninghours, or based on monitoring of condition and perform-ance.

9) The job descriptions for the main overhaul for all the com-ponents in the ship’s CMS scheme are to cover the require-ments for class survey, (see Sec.2, Table E1) and will becredited as a class survey each time these jobs are carriedout. If some main overhaul intervals are based on runninghours and these intervals normally will exceed 5 years, theitems will still be credited after 5 years based on satisfac-tory documentation of regular maintenance records andtests.

10) A system for control of components that are being re-usedin different positions (circulating components, e.g. piston,cylinder cover) is to be established for all such compo-nents in the CMS scheme.Guidance note:It is not required that this system shall necessarily be an integrat-ed part of the planned maintenance system.


11) The CMS items for sea valves and sanitary valves cannotbe credited by the chief engineer, but shall always be sur-veyed by a surveyor. The CMS items for parallel opera-tion, testing of the generators and testing of setting formain and emergency generators protection devices andcircuit breaker shall always be carried out in presence of asurveyor. These requirements are to be stated in the in-structions in the planned maintenance system.

12) All corrective actions are to be especially identified in thesystem.

13) The job descriptions and maintenance history are to be inEnglish.

14) Backup routines are to be established.

15) Annual survey is to be carried out in order to prolong thevalidity of the survey arrangement.

16) Damage to machinery or equipment covered by classifica-tion shall always be reported to the Society and into theplanned maintenance system as a corrective action. Thecorresponding repair shall always be verified by a survey-or.

17) In case of change of manager or operator, the survey ar-rangement is automatically cancelled.

The survey arrangement may also include the instrumentationand automation equipment covered by the rules in Pt.6 Ch.3for the class notations E0 or ECO. All jobs related to the no-tations E0 or ECO have then to be included in the system,clearly identified, with proper test routines and maintenancedescriptions.

If these conditions are not complied with and the deficiency isnot rectified within a given time, the survey arrangement willbe cancelled. The conditions for ordinary continuous surveyarrangement (CMS) of machinery will be re-introduced and allCMS items will be given a due date 5 years from the last sur-vey date.

302 Before a ship may be accepted for alternative survey un-der a PMS arrangement, the system must be based on an ap-proved PMS program. This program may be type approved orapproved on a case-by-case basis. Requirements for type ap-proval are described in a type approval programme in Standardfor Certification 2.9 and in Certification Note 1.2.

Guidance note:The supplier of the planned maintenance system can obtain typeapproval while the system approval can be obtained by the man-ager or operator, see 304.



DET NORSKE VERITAS

303 The system approval of the planned maintenance systemis based on a description of the system and the following doc-umentation:

1) List of items or systems that are included in the PMS withthe corresponding CMS codes.

2) Examples of maintenance descriptions with correspondingtime intervals and identification of class related compo-nents (CMS code).

3) Job descriptions for the CMS items for sea valves and san-itary valves and for parallel operation, testing of the gen-erators and testing of setting for main and emergencygenerators protection devices and circuit breaker. See 301.

4) Example of maintenance history report (class report) forcrediting of CMS components. The report shall at leastcontain component name, CMS code, interval, carried outdate (running hours if applicable) and job history.

5) Procedures for reporting of maintenance activity (accesscontrol in the system, which are reporting history into thesystem etc.).

6) Description of the functionality for handling of postponedor overdue jobs.

7) Description of the system for control of components thatare being re-used in different positions (circulating com-ponents, e.g. piston, cylinder cover).

8) A description of the manager's or operator's maintenancestrategy including a chart of responsibility for the ship andthe management.

9) Description of routines for continuous improvement of themaintenance strategy and intervals on critical components.Identification and follow-up of unplanned maintenance,recording of condition before maintenance is carried out,and recording of all changes in system are important ele-ments in this context.

Guidance note:Maintenance strategy is the manager's or operator's descriptionof how the different machinery items are maintained, that couldbe time based maintenance, condition monitoring and correctivemaintenance.


When the owner is granted a system approval of their system,a system approval certificate will be issued to the owner statingthe system type. A copy of this certificate shall be onboard eve-ry ship that intends to apply for the PMS arrangement.

304 A system approval or a type approval is an approval ofthe system itself and it’s functionality, and not an approval ofhow it is implemented on board each ship. The owner may usethe approved system on board all the ship in his fleet, but animplementation survey is to be carried out on each ship beforethe PMS survey arrangement is granted. For type approvedsystems, the documentation in items 1, 2, 7 and 8 in 303 are tobe submitted before the implementation survey is carried out.

305 An implementation survey on board the ship is requiredin order to verify that all the conditions listed in 301 are com-plied with. Provided that the implementation survey is carriedout with a satisfactory result, a certificate for the survey ar-rangement will be issued for the ship stating system type andconditions for the survey arrangement.

B 400 Integrated survey programme (ISP) - Hull struc-tures and equipment

401 The rules in 400 represent an alternative survey scheme.This scheme allows the owner's shipboard and shore side per-sonnel, as given in 403, to partly conduct inspections and testsas described in 404. The inspections and tests shall be verifiedby the Society at regular intervals.

402 The requirements given in 403 to 416 replace require-ments given for traditional periodical and continuous hull sur-veys carried out by the Society with an integrated surveyprogram (ISP) which describes specific obligations for theowner and the Society based on the ship's arrangement, in-stalled equipment and systems as well as implemented plannedinspection and maintenance system (PIMS).

Guidance note:For ships with class notation NAUTICUS assigned (see Ch.7) adegree of exchange between the owner and the Society of infor-mation stored in the product model is defined. 3-D graphicalmodel is part of the product model and consists of a three dimen-sional view of the hull structure and associated features.


403 ISP is applicable for ships exclusively intended for thecarriage of containers, normally with the class notation Con-tainer Carrier.

The rules apply to ships with operational patterns which allowa planned and controlled implementation of the program andapplication of the ISP will be restricted to ships above a certainsize, normally with a cargo carrying capacity of not less than1 000 TEU.

It is a prerequisite that the ship has a valid safety managementcertificate (SMC) in accordance with the ISM Code.

404 ISP covers inspections of hull structures and equipmentto the extent subject to class surveys as given in Sec.2 C and Dand supporting fittings, structures and equipment for stowingand securing of containers as given in Sec.3 B.

Guidance note:Inspection in this context means visual examination and or pres-sure test.


405 Intervals for planned inspections and maintenanceshould be decided based on the owner's documented experi-ence and/or designers, builders and manufacturers recommen-dations. Intervals for examination of hull structures andequipment covered by ISP, according to 404 are, however,supposed to be shorter than intervals given for periodical sur-veys in A400 and A500, applicable for intermediate and re-newal surveys, respectively.

406 Upon request from the owner, an enrolment letter forISP will be issued when documents listed in a) to d) have beensubmitted by the owner and reviewed by the Society and theinitial survey as given in 411 has been successfully carried out:

a) Information related to conditions given in 403.

b) PIMS.

c) An organisation chart with defined responsibilities, au-thorities and interrelations of all personnel who manage,perform and verify work in accordance with ISP.

d) Qualification and competency of personnel to performtheir assigned functions under the ISP.

Guidance note:It is assumed that the master's responsibility and authority as de-fined in the ISM Code paragraph 5 are maintained with the ISP.

The owner should have a plan on how to provide personnel in-volved in the ISP with adequate understanding of relevant rulesand reporting principles, basic knowledge of structural arrange-ment and hull integrity with respect to design, strength and main-tenance.

This may include establishment and maintenance of proceduresfor identifying any training, which may be required in support ofthe ISP and to ensure that such training is provided.

In order not to impose a redundant burden, ISM Code documentssufficiently detailed may be suitable also for use in the ISP and


DET NORSKE VERITAS

owner may submit copies of documents of the safety manage-ment components that meet requirements for the ISP.


407 The following examinations and tests are to be carriedout under the supervision of a surveyor:

a) Thickness measurement of hull structures as given inSec.2 C and D. Holds or tanks or spaces required to be en-tered for thickness measurement are to be internally exam-ined.

b) Examination of underwater parts in connection with peri-odical bottom survey. In connection with dry-docking,holds, tanks and spaces are to be internally examined to anextent decided by the Society in order to verify structuralcondition and level of maintenance as reported as part ofthe PIMS and shall comprise representative holds, tanksand spaces as applicable.

c) Annual examination of ballast tanks required as a conse-quence of non-effective corrosion protection system.

d) Annual examination and thickness measurement of sus-pect areas as defined in Sec.2 A.

408 The PIMS shall, as a minimum, include a description ofthe following:

— identification of all items included— inspection and maintenance intervals— inspection and maintenance methods and procedures to be

followed— inspection and maintenance reporting procedures— procedure for corrective actions following reported defi-

ciencies.

Guidance note:The inspection of hull structures should include plating, frames,beams, stiffeners and girders including end connections andwelds of all internal members and boundaries for holds, tanksand spaces including hatch covers and coamings as applicable.Evaluation of the condition of corrosion protection system in bal-last tanks and other holds and spaces as applicable should be in-cluded. Piping systems located outside machinery spacesincluding valves and fittings should be included. Importance ofprovisions for inspection with particular attention to cleanlinessand access to structures in order to discover significant corrosion,deformation, fractures or other structural deterioration should beincorporated.Guidelines for assessment of acceptance level of deterioration onhull structures and equipment as applicable and evaluation ofprotective coating condition will be given as part of the ISP.Reporting forms should, as a principle, give information on:

— extent of inspection and maintenance with identification ofspaces and specification of structural elements, equipment,pipes, fittings etc. as applicable within each space being in-spected

— results of inspection with condition of coating and anodes (ifapplicable), structural condition with identification of find-ings as corrosion and defects like cracks, buckling andindents and actions to possible findings including mainte-nance work.

Sketches and photos should generally supplement reports.


409 The PIMS is to include records applicable to inspec-tions, maintenance, damages, defects and carried out correc-tive actions. These are to be kept as objective evidence of thecondition of hull structures and equipment and the effectivefunctioning of the PIMS. The records are to be readily accessi-ble to the attending surveyor.

Guidance note:In order to provide flexibility in the method of documentation,any appropriate record keeping system may be incorporated in

the PIMS including computer-based system. In order to assist thesurveyor to conduct the requisite annual surveys as given in 412without difficulty, suitable cross-referencing may be required.


410 The implementation of ISP requires that descriptive datarelated to the structural condition and level of maintenance foritems included are established.

Guidance note:Relevant data may be obtained based on results from periodicalsurveys and/or condition survey and further supported with in-formation available from classification records.


411 After satisfactory review of documentation listed in 406and after the PIMS has been in operation onboard for a specifictime of normally not less than 6 months, an initial survey is tobe carried out to confirm that the ISP is operating as intended.

Guidance note:During the initial operational period, the Society will evaluatethe ability of ship operating personnel to perform their assignedfunctions.


412 Surveys for verification of the functioning of ISP are re-quired annually as given in Sec.2 B206 and Sec.3 B202.

413 If service experience shows wear and tear or defects thatcannot be considered as normal, this shall be reported to theSociety. In such cases the owner shall initiate, in co-operationwith the Society, a special investigation to identify thecause(s). The Society may require the inspection and mainte-nance interval shortened until suitable corrective actions havebeen implemented.

414 If the hull structure and or equipment covered by the ISPsustain damage to such an extent that it may be presumed tolead to a condition of class (see Pt.1 Ch.1 Sec.3 B), the Societyis to be informed without delay. The ship is to be surveyed inthe first port of call or according to further instructions fromthe Society.

415 Should it be evident that the conditions for the ISP en-rolment or the effective functioning of ISP as basis for reten-tion of class are not complied with, the ISP enrolment will becancelled and conditions for ordinary periodical or continuoussurvey schemes will be introduced.

416 If the owner and or operator of the ship is changed, theISP enrolment will be automatically cancelled.

B 500 Survey arrangement based on condition monitor-ing system

501 For machinery equipped with instruments making it pos-sible to ascertain the condition of the machinery components,special approval may be made as to the extent and method ofthe survey.

502 For oil lubricated tailshafts that are monitored to ascer-tain the condition of the tailshaft system during operation, andthat fulfils the design requirements in Pt.4 Ch.4 Sec.1 E300,the Society will not require any specific time interval betweencomplete tailshaft surveys. See also Classification Note 10.1.

A tailshaft condition monitoring survey arrangement (TMON)will be granted in such cases. The arrangement is applicable toconventional, podded and thruster propulsion systems. Otherarrangements will be subject to special consideration.

Guidance note:For ships granted TMON prior to 1 July 2001, a survey intervalof 15 years between complete tailshaft survey still applies. Shipsgranted TMON prior to 1 July 2001 may also be granted an un-limited survey interval with respect to tailshaft survey if the de-


DET NORSKE VERITAS

sign requirements in Pt.4 Ch.4 Sec.1 E300 are fulfilled and anapplication is submitted.


Dismantling of keyed propellers will be required at intervals ofmaximum 5 years, and keyless propellers every 15 years. Thefollowing parts are to be surveyed as applicable:

— propeller nut— tailshaft threaded end— key and cone including examination of the keyway and the

fore part of the taper by an approved crack detection meth-od.

503 Ships with more than 3 years since the last tailshaft with-drawal must carry out a complete tailshaft survey as describedin Sec.2 K100 in connection with the initial TMON implemen-tation survey, unless the requirements in 504 are met.

504 The following applies to ships applying for the initialTMON survey arrangement and when it is more than 3 yearssince the last tailshaft withdrawal. If a complete satisfactoryrecord can be presented to the Society containing all relevantmeasurements concerning TMON for a period covering thelast 3 years, the requirement for a complete tailshaft survey atTMON implementation survey can be waived. Such recordsshall at least include on a monthly basis, stern tube bearingtemperatures with corresponding sea water temperatures, oilconsumption, water content in oil, and in case of roller bearing,recordings of vibration or shock-pulse measurements or trendanalysis. Where fluid film bearings are applied, bearing clear-ances from last dry docking and wear down measurements tak-en since last shaft withdrawal are to be presented. Thedocumentation is to be submitted to the Society.

505 On board oil analysis for checking of water content andbearing material particles in the stern tube oil is to be per-formed monthly and recorded in the TMON record file by thechief engineer. In addition, at least one oil sample per year isto be submitted to a recognised laboratory for analysis. Thedocumentation of the laboratory analysis is to be kept onboard, and shall contain a conclusion regarding the conditionof the oil and it's suitability for further use. The report from theoil analysis presented to the surveyor at annual surveys is to beless than three months old.

Guidance note:See Classification Note 10.1 Appendix G "Guideline for sterntube lubrication oil analysis."


506 Where an oil lubricated fluid film bearing is applied asan aft stern tube bearing, wear down measurements are to betaken at each bottom survey and are to be recorded in theTMON record file.

Guidance note:When bottom survey is carried out afloat, wear down measure-ments are to be carried out only when practical.


507 Where roller bearings are used, vibration monitoring isrequired to ensure the bearing condition. The vibration signalis to be measured as velocity or acceleration and recorded inthe TMON record file. For more details, see Pt.4 Ch.4 Sec.1E300.

B 600 Surveys of ships out of commission

601 Ships which have been out of commission, i.e. laid up,for a period normally of at least 12 months, are to be surveyedand tested before re-entering service. The extent of the surveysand tests will be considered in each case depending upon thetime the ship has been out of commission, the maintenance andpreservative measures taken during lay-up and the extent of

surveys carried out during this time. As a minimum, a sea trialfor function testing of the machinery installation will be car-ried out.

602 During lay-up, ships are to be subjected to annual gener-al surveys.

603 If the lay-up period is more than 12 months, periodicalsurveys, except the annual general survey, may be postponed,depending on the maintenance and preservative measures tak-en during lay-up.

C. Preparation for Survey

C 100 Application

101 Requirements given in 200 and 300 apply to the hull re-newal survey or complete periodical survey for ships withclass notation Bulk Carrier ESP, Ore Carrier ESP, Tank-er for Oil ESP, Tanker for Oil Products ESP, Tankerfor Chemicals ESP and Tanker for C ESP.

C 200 Survey programme

201 A specific survey programme is to be worked out in ad-vance of the hull renewal survey or complete periodical surveyby the owner in co-operation with the Society. The survey pro-gramme is to be in the written format.

202 The following documentation is to be collected and con-sulted with a view to selecting tanks, holds, areas and structuralelements to be examined:

— survey status and basic ship information— documentation on board as described in 300— main structural plans, including information regarding use

of high strength steel, stainless steel and clad steel— relevant previous survey or inspection reports from the So-

ciety and the owner— information regarding the use of the ship's tanks and holds

with particular emphasis on typical cargoes— information regarding corrosion protection level on the

newbuilding— information regarding relevant level of maintenance dur-

ing operation.

203 The submitted survey programme is to account for andcomply with, as a minimum, the requirements for close-up ex-amination, thickness measurements and tank testing as givenin Sec.3 Table F1 and F2 and F409 for dry bulk cargo ships, inSec.3 Table G1, G2 and G3 for oil tankers and in Sec.3 TableK1, K2 and K3 for chemical tankers.

204 The submitted survey programme is, in addition to therequirements given in 203, to include relevant information in-cluding at least:

— basic ship information and particulars— main structural plans including information on the use of

high strength steel, stainless steel and clad steel— plan of tanks and holds— list of tanks and holds with information on use, corrosion

protection and condition of corrosion protection— condition for survey such as cleaning of tanks and holds,

gas freeing, ventilation, lighting, etc.— provisions and methods for access to structures— equipment for survey— nomination of tanks, holds and areas for close-up exami-

nation— nomination of sections for thickness measurements— nomination of tanks to be tested— damage experience related to the ship in question and, as

applicable, for similar ships.


DET NORSKE VERITAS

205 The extent of survey as described in the survey pro-gramme may be extended as found necessary by the Societybased on the results of the survey.

Guidance note:For more detailed information in conjunction with the prepara-tion of the survey programme, see DNV Guidelines, renewal sur-vey, survey planning.


206 A survey planning meeting is to be held prior to com-mencing the complete periodical survey. The thickness meas-urement operator is to be part of the meeting together withrepresentatives from the owner and the Society. However, ifthickness measurements are not carried out during commence-ment of the complete periodical survey, a separate planningmeeting with the participation of the thickness measurementoperator may be held prior to commencing the thickness meas-urement.

C 300 Documentation on board301 The owner is to supply and maintain on board documen-tation as specified in 303 and 304, which is to be readily avail-able for the surveyor.

302 The documentation is to be kept on board for the lifetimeof the ship.

303 A survey report file consisting of:

— reports of structural surveys— executive hull summary— thickness measurements reports— survey programme

is to be available on board. The survey report file is to beavailable also in the owner's and the Society's manage-ment offices.

304 The following additional documentation is to be availa-ble on board:

— main structural plans of cargo and ballast holds/tanks— previous repair history— cargo and ballast history— extent of use of inert gas plant and tank cleaning proce-

dures— inspections and actions by ship's personnel with reference

to:

— structural deterioration in general— leakage in bulkheads and piping— condition of coating or corrosion protection, if any— any other information that will help to identify critical

structural areas and/or suspect areas requiring inspec-tion.

D. Procedures for Class Related Services

D 100 Thickness measurements — hull structures101 Thickness measurements are to be carried out by a qual-ified company approved by the Society. The thickness meas-urement operator is to participate in the planning meeting asgiven in C206. Thickness measurements are normally to becarried out by means of ultrasonic test equipment. The accura-cy of the equipment is to be proven to the surveyor as required.

102 Thickness measurements required, if not carried out bythe Society itself, are to be witnessed by a surveyor on boardto the extent necessary to control the process.

103 A thickness measurement report is to be prepared. Thereport is to give the location of the measurements, the thick-ness measured and the corresponding original thickness. Fur-thermore, the report is to give the date when the measurements

were carried out, type of measurement equipment, names ofpersonnel and their qualifications. The report has to be signedby the operator. The surveyor is to verify and countersign thereport.

Guidance note:The single measurements recorded are to represent the average ofmultiple measurements.


Guidance note:For more information on reporting of thickness measurements,see DNV Guidelines, DNV Recommended Reporting Principlesfor Ultrasonic Thickness Measurements of Hull Structures.


D 200 Examination of ro-ro ships bow, side and sterndoors201 Companies engaged by the owner in the inspections ofro-ro ships' bow (outer and inner), side and stern doors, the re-sults of which may form the basis for the surveyor's decisions,are to be approved by the Society.

202 Inspections according to 201 may include locking ar-rangement and supports, cleats, hydraulic operating system,electric control and indicator or monitoring systems, sealingarrangement and tightness testing.

Guidance note:Inspections encompass visual examination, NDT of vital ele-ments (i.e. dye penetrant, magnetic particle inspection) andmeasurement of clearances.


203 An inspection report is to be prepared. The report is togive information on arrangement and systems covered by theinspection and the results of visual examination and tests as ap-plicable. Furthermore, the report is to give the date when theinspection was carried out, type of test equipment, names ofpersonnel and their qualifications. The report has to be signedby the operator.

Guidance note:For more information on reporting, see Standard for CertificationNo.2.9, Type Approval Programme No.409.


204 Upon satisfactory review of the inspection report, theSociety may agree to limit the extent of annual surveys, seeSec.2 B400.

E. Provisions for Hull Surveys

E 100 General

101 The owner is to provide the necessary facilities for a safeexecution of the survey.

102 Survey at sea or at anchorage may be accepted providedthe surveyor is given the necessary assistance from the person-nel onboard. Necessary precautions and procedures for carry-ing out the survey are to be in accordance with the rules.

103 Tanks and spaces are to be safe for access, i.e. gas freed,ventilated, etc.

104 Tanks and spaces are to be sufficiently clean and freefrom water, scale, dirt, oil residues, etc. to reveal significantcorrosion, deformation, fractures, damages or other structuraldeterioration. In particular this applies to areas which are sub-ject to thickness measurement. In tanks where soft coatingshave been applied, representative areas and those areas whereit is obvious that further close-up examination is required areto be cleaned free of soft coating. This also applies to access


DET NORSKE VERITAS

requirements (as given below) and the cleaning of areas in wayof the surveyor's route.

Guidance note:For more detailed information with regard to a tank in which softcoatings have been applied, reference is made to IACS Recom-mendation No.44.


105 Sufficient illumination is to be provided to reveal signif-icant corrosion, deformation, fractures, damages or otherstructural deterioration.

E 200 Access to structures201 For overall examination, means are to be provided to en-able the surveyor to examine the structure in a safe and practi-cal way.

202 For close-up examination, one or more of the followingmeans for access, acceptable to the surveyor, is to be provided:

— permanent staging and passages through structures— temporary staging and passages through structures— lifts and moveable platforms— boats or rafts— other equivalent means.

F. Repair of Structural Damage

F 100 Definition101 A prompt and thorough repair is a permanent repaircompleted at the time of survey to the satisfaction of the sur-veyor, therein removing the need for the imposition of any as-sociated condition of class.

F 200 Repairs201 Any damage in association with wastage over the allow-able limits (including buckling, grooving, detachment or frac-ture), or extensive areas of wastage over the allowable limits,which affects or, in the opinion of the surveyor, will affect theship's structural, watertight or weathertight integrity, is to bepromptly and thoroughly repaired. Areas to be considered in-clude:

— side shell frames, their end attachments or adjacent shellplating

— deck structure and deck plating— bottom structure and bottom plating— watertight or oiltight bulkheads

— hatch covers or hatch coamings.

202 For locations where adequate repair facilities are notavailable, consideration may be given to allow the ship to pro-ceed directly to a repair facility. This may require dischargingthe cargo and/or temporary repairs for the intended voyage.

203 Additionally, when a survey results in the identificationof significant corrosion or structural defects, either of which,in the opinion of the surveyor, will impair the ship's fitness forcontinued service, remedial measures are to be implementedbefore the ship continues in service.

G. Machinery Surveys

G 100 Gas turbine maintenance and exchange of com-ponents

101 The society accepts that complete gas turbine units, ormodules, are taken ashore for complete overhaul by a qualifiedcompany.

102 Complete replacement turbines are to be certified. Thecompany performing the work is to be either the originalequipment manufacturer (OEM), or OEM-approved, equippedwith the recommended common shop tools and special toolsand facilities.

103 Documented history regarding maintenance, runninghours and preservation during storage for the unit installedshall be available for examination.

104 Maintenance of gas turbine rotating components, orcomponents in the gas path, is to be carried out using only orig-inal spare parts, or spare parts accepted by the OEM.

105 Maintenance carried out in the form of module replace-ment (e.g. hot section change-out), is to utilise replacementmodules that are of identical design and construction, and ei-ther possess the appropriate DNV certification (i.e. originate inanother DNV certified engine used for a similar application),or are new and produced in accordance with type approved de-sign and under a valid manufacturing survey arrangement(MSA). Modules with other origins will normally not be ac-cepted.

106 A written agreement shall be established between themaintenance company and the local DNV station regarding thepractical details surrounding the class surveys and reviews.

107 The extent of class surveys or reviews to be adhered tofor gas turbines is defined in Sec.2. Parts of this may be per-formed subject to a written agreement as defined in 106.


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SECTION 2SURVEY EXTENT — MAIN CLASS

A. Definitions

A 100 Definitions

101 An overall examination is an examination intended toreport on the overall condition of the hull structure and deter-mine the extent of additional close-up examinations.

102 A close-up examination is an examination where the de-tails of structural components are within the close visual in-spection range of the surveyor, i.e. normally within reach ofhand.

103 Representative tanks are those which are expected to re-flect the condition of other tanks of similar type and serviceand with similar corrosion protection systems. When selectingrepresentative tanks account should be taken of the service andrepair history on board and identifiable critical and/or suspectareas.

104 A Transverse section includes all longitudinal memberssuch as plating, longitudinals and girders at the deck, side, bot-tom; inner bottom and hopper side plating, longitudinal bulk-head and bottom plating in top wing tanks, as applicable.

For transversely framed ships, a transverse section includes ad-jacent frames and their end connections in way of transversesections.

Guidance note:Adjacent frames include the frames located just forward and aftof the transverse section.


105 Suspect areas are locations showing substantial corro-sion and/or are considered by the surveyor to be prone to rapidwastage.

106 Critical structural areas are locations which have beenidentified from calculations to require monitoring or from theservice history of the subject ship or from similar or sister ves-sels to be sensitive to cracking, buckling or corrosion whichwould impair the structural integrity of the vessel.

107 Substantial corrosion is an extent of corrosion such thatassessment of corrosion pattern indicates a wastage in excessof 75% of allowable margins, but within acceptable limits.

108 Corrosion protection system is normally considered ei-ther:

— full hard coating supplemented by anodes, or— full hard coating.

Other coating systems may be considered acceptable as alter-natives provided that they are approved by DNV and appliedand maintained in compliance with the manufacturer's specifi-cation.

109 Coating condition is defined as follows:

GOOD condition with only minor spot rusting.FAIR condition with local breakdown at edges of stiffen-

ers and weld connections and/or light rusting over20% or more of areas under consideration, but lessthan as defined for POOR condition.

POOR condition with general breakdown of coating over20% or more of areas or hard scale at 10% or moreof areas under consideration.

110 A ballast tank is a tank which is being used primarily forwater ballast.

For oil carriers and chemical carriers, as given in Sec.3 G andK respectively, a ballast tank is a tank which is used solely forballast or a tank used for both cargo and ballast in which sub-stantial corrosion has been found during previous surveys.

B. Annual Survey

B 100 Survey extent101 For convention ships (see definition in Sec.1 A200), thesurvey is normally to cover systems and parts as specified in200 to 1000. For non-convention ships, the survey is limited tocover systems and parts as specified in 200, 402, 404, 600 and700.

B 200 Hull structures and equipment201 The survey is to cover:

— hull plating as far as can be seen— anchoring and mooring equipment— watertight bulkheads with watertight doors and penetra-

tions.

202 Ballast tanks are to be internally examined when re-quired as a consequence of no protective coating, soft coatingor POOR protective coating condition at previous intermediatesurvey or renewal survey.

The examination may, unless otherwise decided by the survey-or, be carried out as an overall examination.

If considered necessary by the surveyor thickness measure-ments of parts showing reduced strength will be required.

203 Suspect areas as defined in A105 identified at previousintermediate survey or renewal survey are to be overall andclose-up examined.

Areas with substantial corrosion as defined in A107 are to havethickness measurements taken. Table D4 should be used asguidance.

For suspect areas, the extent of overall and close-up examina-tion and the extent of thickness measurements may be espe-cially considered in cases where such areas have been re-coated (by epoxy coating or equivalent, alternatively a type ap-proved coating, e.g. semi-hard or similar), provided:

— the scantlings were assessed and found satisfactory by asurveyor prior to re-coating

— the coating was applied according to the manufacturer'srecommendations

— verification at intermediate and renewal surveys that coat-ing is maintained in GOOD condition.

204 If a loading instrument or loading computer system isavailable onboard, functionality is to be verified with respectto strength and stability, whichever is applicable.

205 It is to be verified that approved loading and stability in-formation is kept available onboard.

This information is the same as required when the ship was as-signed class with the Society or at a later conversion of theship, in accordance with the rule requirements applicable ineach case.

206 For ships enrolled with alternative survey scheme, ISP,as given in Sec.1 B400, an annual survey is required in orderto retain validity of the ISP.

The survey is to include:


DET NORSKE VERITAS

— ISP performance review with verification that the condi-tions for the enrolment of ISP are maintained

— examination of PIMS records with regard to inspectionsand maintenance carried out since last annual survey in-cluding description of corrective actions taken in responseof reported deficiencies.

If deemed necessary by the surveyor, based on the review ofinspection and maintenance records, or acceptance criteria giv-en as part of the ISP are exceeded, examination and or test, un-der the supervision of a surveyor, is required.

Based on a satisfactory result of this survey, the validity of theISP will be extended until the next annual survey.

B 300 Safety construction301 The survey requirements are covered by the annual sur-vey of:

— hull structure and equipment, see 200— machinery and safety systems, see 600— fire protection arrangements, see 700.

B 400 Openings and closing appliances401 The following information is to be available onboard:

— stability information, see Pt.3 Ch.4 Sec.1 C— record of condition of assignment— report on measurements for load line— operating and maintenance manual for doors in ship's bow,

sides and stern.

402 The following is to be surveyed or tested:

— doors in ship's bow, sides and stern, as described in 405— hatch covers and hatch coamings on freeboard and super-

structure decks, as described in 404— openings in superstructures and deck houses— exposed machinery casing and skylights— ventilation ducts for engine and boiler rooms with damp-

ers— ventilator and air pipes with coamings— windows, deadlights and side scuttles— scuppers, discharges and valves with hull attachments— fittings and appliances for timber deck cargoes.

403 Means of protection of the crew, such as guard rails, bul-wark, gangways, and walkways, lifelines, freeing ports andshutters are to be surveyed.

404 For hatch covers and coamings the survey is to includeclose-up examination, as well as the tightness, clamping andoperating devices.

405 For doors in ship's bow (outer and inner), sides andstern, the survey and testing is to include:

— doors, ramps, hinges, packings, cleats, supports and lock-ing arrangement

— surrounding structure— space between outer and inner bow doors— indicators and audible alarms— television surveillance— notice plates— operating and maintenance manual.

In cases where the inspection of doors has been carried out bya company approved by the Society, as given in Sec.1 D200,the extent of survey may be limited at the discretion of the sur-veyor. However, the survey shall, as a minimum, include:

— operating and maintenance manual— notice plates— structural arrangement of doors including surrounding

structures and space between outer and inner bow doors— complete opening and closing operation.

B 500 Load line marks

501 Load line marks to be surveyed and confirmed in ac-cordance with valid certificate.

B 600 Machinery and safety systems

601 The survey is to cover:

— machinery and boiler spaces with special attention to thefire and explosion hazards

— remote control and quick closing and stop of valves,pumps, fans etc.

— bilge systems— boilers, pressure vessels and firing or combustion installa-

tions— electrical machinery including emergency power supply— steering gear— communication systems from bridge to machinery and

steering gear spaces— cargo systems in ships intended for supply service to off-

shore installations— if arranged, cement and dry mud cargo piping situated

within the engine room is to be examined and tightnesstested, particular attention being paid to possible reductionof pipe wall thickness and to tightness of detachable con-nections

— tightness of fixed refrigerating plants— if installed, controlled atmosphere (CA) installations are

to be surveyed with regard to safety precautions, see Sec.3S.

602 For ships granted a survey arrangement based on an ap-proved planned maintenance system (PMS), an annual surveyof the PMS is required to prolong the validity of the arrange-ment. The purpose of this survey is to review and evaluate theprevious period's maintenance activities and experience (seeSec.1 B300). The annual survey shall consist of the followingmain elements:

a) he maintenance history will be examined in order to verifythat the PMS has been operated according to the intentionsand that the system is kept up to date.

b) Evaluation of the maintenance history for main overhauljobs on the components covered by the continuous ma-chinery survey (CMS) scheme carried out since last annualsurvey.

c) Details of corrective actions on components in the CMSscheme are to be made available.

d) If condition monitoring equipment is in use, function testsof this equipment and verification of the calibration will becarried out as far as practicable and reasonable.

If found necessary by the surveyor, opening or testing of ma-chinery may be required.

603 For annual survey of water jets, see Rules for Classifica-tion of HS, LC and NSC Pt.7 Ch.2 Sec.2 E300 and E400, if ap-plicable.

604 Gas turbines are subject to additional requirements asdefined in 1100.

B 700 Fire protection arrangement

701 The survey is in all cases to cover:

— fire doors— skylights and dampers in ventilation ducts— emergency escape routes— fire pumps, fire mains, hydrants, hoses etc. of water fire

fighting system and international shore connection— non-portable and portable fire extinguishers and portable

foam applicators— fireman's outfit


DET NORSKE VERITAS

— fixed fire extinguishing systems and fire protection sys-tems

— fire detection systems.

702 Inspection and testing of fixed gas and dry powder fireextinguishing systems are to be carried out periodically at thefollowing intervals:

— biennial inspection is to be carried out by a specialist firmand record from inspection is to be filed onboard

— high pressure CO2 / Inergen / Argonite / Nitrogen cylin-ders in fixed fire extinguishing systems are to be subject toperiodical hydrostatic testing at maximum intervals of 10years. Testing is required for not less than 10% of the cyl-inders every 10 years

— low pressure CO2 bulk containers are to be internally sur-veyed if the content has been released and the container ismore than 5 years old. The annual external inspection ofinsulated containers is to include spot check of the outersurface beneath the insulation. Depending on the result ofthe internal survey, hydrostatic testing may be required atthe surveyor's discretion.

703 Survey and testing of fire extinguishers are to be carriedout periodically at the following intervals:

— annual inspection or maintenance by competent person orship's responsible safety officer, in accordance with man-ufacturer's instructions

— every five years examined and refilled by an approvedfirm

— every ten years from date of manufacture overhauled andsubjected to hydrostatic test to 1,35 times maximum work-ing pressure, by manufacturer or approved firm.

704 Fireman's outfit

Guidance note:

It is recommended that intervals for hydraulic pressure testing ofbreathing apparatus' air cylinders do not exceed 5 years. Any ad-ditional requirements from national authorities will prevail.


705 Testing of quality of foam-forming liquids is to be car-ried out periodically not later than 3 years after manufactureand annually thereafter. Testing is to be carried out by the man-ufacturer or an approved firm.

706 Ships carrying motor vehicles with fuel in their tanks inenclosed spaces, and not having the additional class notationPET, are to have the fire and ventilation arrangements forthese spaces surveyed, the extent of the survey being equal tothat required for the additional class notation PET, see Sec.3E.

B 800 Safety equipment

801 The following information is to be available onboard:

— safety equipment record— service certificate for inflatable liferafts and hydrostatic

release— liferaft launching instructions (posted)— instruction and notices regarding fire fighting equipment

(posted)— fire control plan (posted)— instructions for maintenance and operation of all fire fight-

ing equipment.

802 The log book is to be examined regarding entries of:

— lifeboat, fire muster- and abandon ship drills (see Ch.3Sec.2 C)

— inspection, servicing and launching of all survival craft,rescue boat, hyperbaric lifeboat and free-fall lifeboat, asapplicable (see Ch.3 Sec.2 D)

— failing to react to distress signals (see Ch.3 Sec.3 B)— steering gear testing and emergency drills (see Ch.3 Sec.3

B).

803 The following is to be examined or tested, as applicable:

— safety of navigational aids— signalling apparatus— navigation lights— line throwing appliances and distress signals— survival craft, rescue boat and associated launching and

recovery appliances— personal life-saving appliances— pilot ladder and accommodation ladder— mechanical pilot hoist.

B 900 Pollution prevention, all ships

901 The following is to be surveyed:

— validity of pollution prevention certificate— certificates for type approved oily water separating or fil-

tering equipment, process unit and oil content meters— oil record book entries— means of control of sludge— standard discharge connection.

902 The following is to be examined or tested, as applicable:

— oily water separating system (100 ppm)— oil discharge monitoring and control system (100 ppm)— oil filtering equipment (15 ppm) and process unit with

alarm— automatic stopping device (15 ppm)— separation of oil fuel and water ballast system— sludge tank and discharge arrangement externally.

B 1000 Noxious liquid substances, NLS (if applicable)

1001 The following is to be checked on board during survey:

— noxious liquid substances certificate— approved P&A manual— cargo record book entries— arrangements and equipment as described in the proce-

dures and arrangement manual.

B 1100 Gas turbines

1101 All ships equipped with gas turbines shall have themaintenance of the gas turbines properly implemented in theship's planned maintenance system (PMS). The PMS shall re-flect the maintenance activities and intervals, as agreed upon,between the operator and the turbine manufacturer, or as nec-essary.

1102 Annual survey consists of external and internal inspec-tion and documentation review of operational and maintenancerecords.

1103 At each annual survey the extent and criteria specifiedin Table B1 apply.

1104 The survey items may be covered through inspection oroverhaul at a service or maintenance centre provided the re-quirements defined in Sec.1 G100 are adhered to.


DET NORSKE VERITAS

1105 Further inspections (i.e. through opening up) and testscan be required at annual survey if indications of abnormalitiesare observed.

C. Intermediate Survey

C 100 Application and survey extent101 Requirements for intermediate survey as given in 102and 200 to 400 are not applicable to:

— ships less than 500 gross tonnage except ships with classnotations Bulk Carrier ESP, Ore Carrier ESP, Tank-er for Oil ESP or Tanker for Oil Products ESP,Tanker for Chemicals ESP and Tanker for C ESP.

— ships constructed of materials not subjected to corrosion(e.g. aluminium, GRP)

— ships with additional class notation Fishing Vessel,Stern Trawler, Barge, Pontoon, Passenger Ship.However, if the notation Passenger Ship is combinedwith other type notations as e.g. RO/RO or Container,etc. intermediate survey is required.

Items 500 and 600 apply to convention ships (see definition inSec.1 A200).

102 In connection with the overall examination of ballasttanks as given in 300 and 400, the following apply:

— if considered necessary by the surveyor, thickness meas-urements of parts showing reduced strength will be re-quired

— if an overall examination reveals no visible structural de-fects, the examination may be limited to a verification thatthe corrosion protection system remains effective

— for ballast tanks, if there is no protective coating, soft coat-ing, or POOR condition of coating as defined in A109 andit is not renewed, retainment of class will be made subjectto the tanks in question being examined at annual inter-vals, with thickness measurements carried out as consid-ered necessary. For ships other than oil carriers andchemical carriers as given in Sec.3 G and K, when suchconditions is found in double bottom ballast tanks, retain-ment of class may be made subject to the tank in questionbeing examined at annual intervals.

Waiver of the internal examination at annual intervals for tanksof 12 m3 or less, with soft coating, may be considered.

C 200 Ships up to 5 years old201 Survey extent to comply with requirements given inB100.

C 300 Ships more than 5 years of age but not exceeding10 years301 The requirements given in 201 apply with the additionsgiven in 302 to 303.

302 An overall examination of representative ballast tanksselected by the surveyor is to be carried out.

303 For ballast tanks, if there is no protective coating, softcoating, or POOR condition of coating as defined in A109 andit is not renewed, the examination is to be extended to otherballast tanks of the same type, if applicable.

C 400 Ships more than 10 years of age

401 The requirements given in 201 apply with the additionsgiven in 402 to 403.

402 Overall examination of all ballast tanks are to be carriedout.

403 For dry cargo ships more than 15 years of age, other thanthose given in Sec.3 F, selected cargo compartments are to beexamined.

C 500 Pollution prevention, all ships

501 The survey requirement given in B900 apply.

502 The system arrangement is to be surveyed for proper in-stallation and operation.

C 600 Noxious liquid substances, NLS (if applicable)

601 The survey requirements as given in B1000 apply.

D. Renewal Survey — Hull Structures andEquipment

D 100 All vessels

101 The requirements given in B apply with the additions oramendments given in 102 to 120.

102 An examination of underwater parts as given in Sec.2 Jis to be part of the renewal survey.

103 All spaces including holds and their 'tween decks wherefitted, ballast and cargo tanks, pump rooms, pipe tunnels, ductkeels, machinery spaces, dry spaces, cofferdams and voids areto be internally examined with plating and framing, bulkheadsand all decks, casings and superstructures, bilges and drainwells. Internal examination of fuel oil, lubrication oil and freshwater tanks may be especially considered as given in 105.

104 The engine room structure is to be examined. Particularattention is to be given to tank tops, shell plating in way of tanktops, brackets connecting side shell frames and tank tops, andengine room bulkheads in way of tank top and bilge wells.Where wastage is evident or suspect, thickness measurementsare to be carried out.

Table B1 Gas turbine annual surveySurvey item Extent Acceptance criteria RemarksSurvey of records PMS or maintenance

records checkMaintenance activities shall have been car-ried out in accordance with manufacturer rec-ommendations

Review of maintenance reports and/or checkof conformity with PMS

Survey of gas turbine Visual inspection andboroscope inspections

No indications of wear or degradation, be-yond manufacturers acceptance criteria

Boroscope inspection either performed insurveyor presence, or records 1) of boroscopeinspection performed within last month to beavailable

Monitoring, controland emergency shut-down system

System functionalitytesting

Software version(s) to be in accordance withcertificate.No deviations in functionality

Spot-checks of functionality. May be per-formed in combination with machinery andsafety systems survey, or E0 survey

1) The report is to describe boroscope extent, findings (if any), and conclusions or evaluation. If inspection is performed in surveyor’s pres-ence, such a report is to be prepared subsequently, and submitted to the Society.


DET NORSKE VERITAS

105 Tanks are to be internally surveyed in accordance withTable D1, as far as applicable.

106 The examinations required in 103 to 105 are to be suffi-cient to discover substantial corrosion, significant deforma-tion, fractures, damage or other structural deterioration. Close-up examinations of structures are to be carried out to the extentdeemed necessary by the attending surveyor.

1) Tanks of integral type

2) If a selection of tanks are accepted to be surveyed, then different tanksare, as far as practicable, to be surveyed at each survey, on a rotationalbasis.

3) Tanks within cargo areas, used as bilge water holding tanks, are to be ex-amined as required for sea water tanks.

4) For double bottom tanks, used primarily for oil fuel, at least one forwardtank is to be internally examined at third renewal survey, and at fourthand later renewal surveys, at least one forward and one aft tank are to beinternally examined.

Guidance note:Integral tanks form a part of the ship's hull and are influenced inthe same manner and by the same loads that stress the adjacenthull structure.Independent tanks within machinery spaces (non-integral, self-supporting tanks which do not form part of the ship's hull) arenormally surveyed as part of the renewal survey for machinery,see E.


107 The requirements for thickness measurements are givenin Table D3. Transverse sections are to be chosen where thelargest reductions are suspected to occur.

In cases where two or three sections are to be measured, at leastone is to include a ballast tank, as far as applicable.

108 Where substantial corrosion as defined in Sec.2 A107 isfound, the extent of thickness measurements is to be increased.Guidance for extended measurements is given in Table D4.

109 The surveyor may further extend the thickness measure-ments as deemed necessary.

110 The extent of thickness measurements of internals maybe especially considered provided the surveyor is satisfied thatthere is no structural strength reduction, and the original coat-ings are found to be in GOOD condition as defined in Sec.2A109. The same applies after re-coating (by epoxy coating orequivalent, alternatively a type approved coating, e.g. semi-hard or similar), provided that the present coating condition ofthe considered area is in GOOD condition and that documen-tation is available stating that:


— the coating was applied according to the manufacturer'srecommendations.

111 Boundaries of double bottom tanks, deep tanks, ballasttanks, peak tanks and other tanks, including holds adapted forthe carriage of ballast water, are to be tested to the maximumpressure they can be subjected to in service.

Special consideration may be given to limit testing of fuel oil,lubricating oil and fresh water tanks to representative tanks

with an extent corresponding to Table D1 given for tank sur-vey.

Requirements for pressure testing of such tanks may be espe-cially considered based on a satisfactory survey of the tankboundaries, and a statement from the master that operation hasbeen free from leakage and signs of structural weakness.

112 The survey extent of combined ballast and cargo holdsand tanks is to be evaluated based on the records of ballast his-tory, the extent and condition of the corrosion protection sys-tem provided and the extent of corrosion found.

113 The survey extent of ballast tanks converted to voidspaces should be especially considered in relation to the re-quirements for ballast tanks.

114 For ballast tanks, if there is no protective coating, softcoating, or POOR condition of coating as defined in A109 andit is not renewed, retainment of class will be made subject tothe tanks in question being examined at annual intervals, withthickness measurements carried out as considered necessary.For ships other than oil carriers and chemical carriers as givenin Sec.3 G and K, when such conditions is found in double bot-tom ballast tanks, retainment of class may be made subject tothe tank in question being examined at annual intervals.

Waiver of internal examination at annual intervals for tanks of12 m3 or less, with soft coating, may be considered.

115 Pipes, valves etc. of piping systems outside the machin-ery spaces are to be examined and tested as indicated in TableD2. For examination of pumps, heat exchangers etc. and pip-ing systems not covered by Table D2, see E101. All sea valves,including scuppers and sanitary discharges, are to be surveyedaccording to E101.

116 If arranged, cement and dry mud pressure tanks are to beexamined internally. Pressure testing to 1.2 times the workingpressure may be required if found necessary by the surveyor.

117 Windlass, including piping system and masts withstanding rigging and foundations are to be examined. The an-chors and chain cables are to be ranged, examined and the re-quired complement and condition verified. The chain lockers,holdfasts, hawse pipes and chain stoppers are to be examinedand drainage arrangement of the chain lockers tested.

118 The existence of required signboards is to be verified.

119 If a loading instrument or loading computer system isavailable onboard, it is to be tested by using the approved testconditions. Functionality and accuracy is to be verified withrespect to strength and stability, whichever is applicable.

120 Special arrangements related to stability such as water-tight closing appliances for openings in internal bulkheads anddecks, cross-flooding, counter-flooding etc., are to be exam-ined and tested if necessary. The watertight integrity of inter-nal bulkheads and decks is to be verified.

Table D1 Tank survey 1), 2)

TankAge of ship, years

0 to 5 5 to 10 10 to 15 above 15Sea water 3) all all all allFresh water one one all allFuel and sludge 4) one one two halfLubricating oil none none one halfPeak all all all all

Table D2 Examination and testing 1) of piping, outsidemachinery spacesSystemBilge and ballast 1)

Fuel oil 2)

Steam with temperature below 450°CCompressed airHydraulic (see also 115)Air and sounding1) External examination and performance test is to be carried out.

Opening up and/or pressure testing may be required if foundnecessary by the surveyor. Last overhaul is to be verified.

2) For vessels more than 10 years of age, fuel pipes passingthrough ballast tanks are to be pressure tested.


DET NORSKE VERITAS

D 200 Ships more than 5 years of age (normally for thesecond renewal survey and later)

201 The requirements given in 100 apply with the amend-ments and additions given in 202.

202 The anchors and chain cables are to be ranged for surveyand calibrated. Any length of chain cable found reduced in

mean diameter beyond 12% of its original rule diameter at itsmost worn part, is to be renewed.

The mean diameter is half the value of the sum of the minimumdiameter found in one cross-section of the link and of the di-ameter measured in a perpendicular direction in the samecross-section.

E. Renewal Survey — Machinery and SafetySystems

E 100 General

101 The survey is to include the items given in Table E1 asfar as applicable.

E 200 Electrical installations

201 The survey is to comprise examination of the electricalinstallations with regard to fire and explosion hazards and in-jury from accidental touching. The survey is also to include

testing of correct functioning of equipment covered by rulesrequirements.

202 The insulation resistance of the complete installation isto be measured. The results are to be presented to the surveyor.

203 As far as practicable the following equipment is to be ex-amined for satisfactory condition:

— main and emergency switchboards— generators— distribution boards— motor starters— electrical motors

Table D3 Minimum requirement of thickness measurement at renewal hull surveysRenewal survey no. 1

Age ≤ 5Renewal survey no. 2

5 < Age ≤ 10Renewal survey no. 3

10 < Age ≤ 15Renewal survey no. 4

Age > 151.Suspect areas

1.Suspect areas

1.Suspect areas

1.Suspect areas

2.Within amidships 0.5 L: Onetransverse section of deck platingabreast a cargo space.

2.Within amidships 0.5 L: Twotransverse sections abreast of twodifferent cargo spaces.

2.Within the amidships 0.5 L:

Three transverse sections in wayof cargo spaces.

3.Internals in forepeak tank.

3.Internals in forepeak tank and af-ter peak tanks.

4.All cargo hold hatch covers andcoamings (plating and stiffeners).

4.All cargo hold hatch covers andcoamings (plating and stiffeners).5.All exposed main deck plating infull length.6.Representative exposed super-structure deck plating (poop,bridge and forecastle deck).7.Lowest strake and strakes in wayof tween decks of all transversebulkheads in cargo spaces togeth-er with internals in way.8.All wind- and water strakes, portand starboard, full length.9.All keel plates full length. In addi-tion, additional bottom plates inway of cofferdams, machineryspace and aft end of tanks.

Notes:

1) Thickness measurement locations should be selected to provide the best representative sampling of areas likely to be most exposed to corrosion, consid-ering cargo and ballast history and arrangement and condition of protective coatings.

2) For ships less than 100 m in length, the number of transverse section required at renewal survey no. 3 may be reduced to one (1), and the number of trans-verse sections at subsequent renewal surveys may be reduced to two (2).

3) For ships more than 100 m in length, at renewal survey no. 3, thickness measurements of exposed deck plating within 0.5 L may be required.

Table D4 Guidance for extent of thickness measurements at those areas of substantial corrosionStructural member Extent of measurement Pattern of measurementPlating Suspect area and adjacent plates 5 point pattern over 1 m2

Stiffeners Suspect area 3 measurements each in lineacross web and flange


DET NORSKE VERITAS

— convertors (e.g. transformers, rectifiers, chargers)— cable installations— enclosures for electrical equipment— lighting equipment— heating equipment— battery installations.

204 The following tests are to be carried out to the extentdeemed necessary by the surveyor to ascertain the proper func-tioning of the equipment:

— generator full load test— generator parallel operation— generator protection relays including non-important load

trip (if fitted)— generator remote speed control— generator synchronising equipment— power plant interlocking systems— insulation resistance indicating device— emergency generator including switchboards— battery chargers— mechanical ventilation of battery rooms or lockers— navigation lights, with controllers including alarms.

E 300 Instrumentation and automation

301 Correct functioning of the various parts of the followingsystems is, as far as applicable, to be verified to the satisfactionof the surveyor:

— each alarm and safety system— fire alarm system— manual control of machinery— remote control of propulsion machinery. It will normally

be required that the following manoeuvres are effected:

— from stop to ahead— from ahead to astern— stop— from stop to astern— stop by operating the emergency device.

302 It is to be verified that the remote control can be trans-ferred to stand-by manual control in the engine room in case ofpower supply failure to the remote control system.

303 When cancelling of automatic load reduction and/or au-tomatic stop of engine are provided, these functions are to bedemonstrated to the satisfaction of the surveyor.

E 400 Gas turbines

401 Renewal survey involves internal inspection requiringdismantling. The survey intervals should be specified in eachindividual case, and conform to the refurbishment or overhaulintervals and extent defined by the manufacturer. Generally, aDNV surveyor is to witness the inspection or overhaul work,verifying that it is carried out in accordance with the manufac-turer's own recommendations and criteria. In special cases anagreement can be made with the Society allowing witnessingto be substituted by a review of maintenance or overhaul doc-umentation, showing that the unit has been inspected or over-hauled in an appropriate manner complying with themanufacturer's maintenance recommendations.

402 Renewal survey activities are in general of such a naturethat they should be performed at a maintenance depot. Uponspecial request to the Society the survey activities may be car-ried out onboard, provided the requirements defined in Sec.1G100 are adhered to.

403 Upon completion of onboard overhaul, or installation ofoverhauled unit or module, the gas turbine is to be tested. Thetesting is to cover alarms and shutdown functionality, as wellas engine control (i.e. single engine control, backup control)and general performance. Test procedure is to be agreed with

the Society. System behaviour and measured parameters are allto satisfy manufacturer acceptance criteria.

Guidance note:Original operations documentation retained on board will reflectthe original manufacturer alarm or acceptance limits and setpoints as established through the type approval.


404 Further inspections can be required at renewal survey ifany indications of abnormalities are observed.

F. Safety Construction

F 100 Renewal survey

101 The requirements in 102 to 108 apply to all conventionships.

102 The requirements as given in B300 apply, and also thosegiven under the requirements for renewal survey of ship's hull,machinery and equipment (see D and E).

103 The following is to be checked during survey:

— no cellulose-nitrate films are used in cinematograph instal-lations

— no paint, varnishes etc. having a nitro-cellulose or highlyinflammable base are used in accommodation or engineroom.

104 Stairways and ladders from passenger and crew spaces,except engine room, are to be surveyed for ready means of es-cape to lifeboat embarkation deck.

105 It is to be checked during survey that there exist 2 sepa-rate means of escape from the engine room, boiler room andshaft tunnel.

106 The requirements in 107 and 108 are applicable to ves-sels built after 1981, and come in addition to requirements giv-en under 102 to 105.

107 It is to be checked during survey that 2 separate meansof air supply are provided for control stations outside the ma-chinery space, so as to minimise risk of simultaneous smokeinlets.

108 It is to be checked during survey that there exist 2 widelyseparated means of escape from each restricted space or groupof spaces, such as from engine room and from Ro-Ro cargospaces where crew is normally employed.

G. Opening and Closing Appliances, andLoad Line Marks

G 100 Renewal survey

101 The survey requirements given in B100 apply, with theadditions given in 102.

102 All hatch covers are to be tested in operation and foundsatisfactory.

H. Pollution Prevention, All Ships

H 100 Renewal survey

101 The survey requirements given in 102 apply to all con-vention ships.

102 The survey requirements as given in B900 and C500 ap-ply.


DET NORSKE VERITAS

I. Noxious Liquid Substances, NLS

I 100 Renewal survey101 The survey requirements given in 102 and 103 apply toall convention ships.

102 The survey requirements as given in B1000 apply.

103 Cargo tank ventilation equipment is to be surveyed andtested.

Table E1 Machinery surveysItem or system Survey method 1)

Propulsionmachinery

Diesel enginesTurbinesSteam reciprocating machineryEvaporators and condensers with ejectorsElectrical main motorsThrust- and intermediate shaft bearings

1 and 21 and 21 and 2

11 and 2

1Gears 3) Shafts with pinions, gear wheels, couplings and bearings 1Auxiliarymachinery

Diesel enginesTurbinesSteam reciprocating enginesPrime movers for auxiliary thrusters 2)3)

1 and 21 and 21 and 2

2Pumps 4) Piston pumps

Screw pumps, gear pumpsCentrifugal pumps for sea water, bilge and ballastOther centrifugal pumps and ejectors

1212

Pipes, valves, inde-pendent tanks etc.inside machineryspaces 10) 11) 13)

Lubricating oil 5)

Fuel oil 12)

Bilge and ballast 6)

Cooling waterSteam with temperature 450°C and above 7)

Steam with temperature below 450°CSteam pipes of copper 8)

Feed waterCompressed airHydraulic

2222222222

Electrical installa-tions

GeneratorsSwitchboardsDistribution boardsElectrical equipmentCable installationNavigation light controllersMechanical ventilation of battery lockers or rooms

2222222

Sundry 4) Gas compressorsAir compressorsEmergency compressorsCompressed air receivers 9)

Heat exchangersVentilation fans for boilersIncinerator arrangementInert arrangement for vessels without notation INERT (see also Sec.3 H)Instrumentation and automation for vessels without notation E0 or ECO (see also Sec.4 E)

1 and 222

1 and 212

1 and 21 and 2

21) The survey methods given are defined as follows:

Survey method No. 1: Visual inspection by opening up fully or partly as deemed necessary by the surveyor. Pressure testing to be carried out when rel-evant and found necessary by the surveyor.Survey method No. 2: External survey and performance test to be carried out. Alarm- and safety functions to be tested if found necessary by the surveyor.Opening up and/or pressure testing may be required if found necessary by the surveyor. Last overhaul to be verified.

2) For definition and survey extent, see N.

3) Selected bearings are to be examined. Gears and roller bearings may as far as practicable be inspected without dismantling complicated assemblies.

4) Prime movers and starters to be surveyed together with pumps and units.

5) Strainers to be opened. Selected pipes and main engine(s) system tanks to be surveyed for sludge.

6) Valves, cocks and strainers to be opened.

7) Crack and/or thickness examination may be required. Selected pipes to be pressure tested to 1.5 times working pressure.

8) To be pressure tested to 2 times working pressure.

9) To be pressure tested to 1.2 times working pressure if internal survey not possible.

10) Sea valves to be opened (including scuppers and sanitary discharges).

11) For piping systems outside machinery spaces, see D111.

12) Settling tanks and daily service tanks for both heavy fuel and diesel oil to be surveyed for sludge. If inspection and cleaning of above tanks have beencarried out by the crew during the last 12 months and relevant log extracts provided and confirmed, this may be accepted as survey at the surveyor's dis-cretion.

13) Valves where function in the piping system is not evident are to be checked for adequate and readable marking for identification.


DET NORSKE VERITAS

J. Bottom Survey

J 100 Survey extent

101 The following parts, situated below the deepest load wa-terline, are to be surveyed:

— hull plating and sternframe— openings— steering fins, shaft brackets and other appendages fitted— rudder with attachments— propeller with rope guard arrangement.

J 200 Survey methods and conditions

201 For ships having approved tailshaft oil sealing gland ar-rangements and synthetic or metallic rudder bearing material,bottom surveys may be carried out afloat provided the intervalbetween two such surveys in dry dock or on a slipway does notexceed five years. The in-water survey is to provide the infor-mation normally obtained from a docking survey, as far aspracticable. Special consideration is to be given to ships of 15years of age and above before being permitted to have such in-spection.

During such surveys the following conditions are normally tobe satisfactorily fulfilled:

— the water conditions at the location of the survey are to besatisfactory with respect to visibility, current, swell etc.

— if a diving company is used in the survey, they are to usepictorial equipment of such quality that the surveyor is ful-ly satisfied with the information relayed to him

— location of possible damages to be ascertained.

If the in-water survey reveals damage or deterioration that re-quires early attention, the surveyor may require that the ship bedrydocked in order that a detailed survey can be undertakenand the necessary repairs carried out.

J 300 Survey details

301 The rudder is to be surveyed and the bearing clearancesare to be measured (clearances for forced oil lubricated bear-ings need not be confirmed when the bottom survey is carriedout afloat). As far as practicable and always at surveys carriedout with the ship in dock or on a slipway, securing of nuts torudder pintles, shafts or stocks and securing of bolts are to beconfirmed to be in order.

Dismantling may be required to the extent found necessary bythe surveyor.

302 For spade rudders the welded connections between therudder side plates and the rudder flange are to be checked byan efficient crack detection method at every docking.

303 For spade rudders with bracket connections in way ofthe rudder flange (i.e. «open construction»), the welded con-nections between the brackets and the rudder flange and therudder top plate are to be checked by an efficient crack detec-tion method at every docking.

304 For spade rudders with cone coupling to rudder stock,the side plating and weld connections in way of access openingto nut, including welds of cover plate, are to be checked by anefficient crack detection method at every docking.

305 The propeller is to be surveyed and shaft sealing ar-rangements checked for tightness. For shafts not running in oil,the clearances are to be measured. For variable pitch propel-lers, tightness of hub and blade sealings is to be verified andlocking arrangements for bolts to be checked. Dismantlingmay be required to the extent found necessary by the surveyor.

306 Thrusters not defined as propulsion thrusters or incorpo-rated in systems for the dynamic positioning of ships (class no-tation AUTS, AUT, AUTR or AUTRO) are to be surveyed asauxiliary thrusters as per Table J1, as far as applicable.

If the bottom survey is performed afloat, Table J1 is to be ap-plied, as far as possible.

For thrusters for propulsion and AUTS, AUT, AUTR or AU-TRO, see N.

K. Tailshaft Survey

K 100 Renewal survey

101 The survey is normally to include complete withdrawalof the tailshaft and examination of the following parts, whererelevant:

— propeller nut and tailshaft threaded end— cone, key and keyway, including examination of the fore

part of the taper and keyway by an approved crack detec-tion method

— tailshaft bearing areas— stern bushes or bearings— shaft sealing arrangement, including lubricating oil sys-

tem.

K 200 Intermediate survey

201 The survey applies to oil lubricated tailshafts with ap-proved sealing glands and is normally to include examinationof the following parts, where relevant:

— tightness of sealing arrangements— lubricating oil system including monitoring of oil level,

and oil analysis— shaft couplings.

For shaft arrangements where the propeller is secured to thetailshaft by means of a key, the propeller is to be backed offand the top of the cone including the forward part of the key-way is to be examined by an approved crack detection method.

Table J1 Extent of surveys and tests of auxiliary thrusters

Survey and testsSurvey interval

2,5 years 5 years1. Survey extent1.1 Oil analysis of gear houseoil and oil for the CP mecha-nism

x 1)

1.2 Survey of gear and bearingsthrough inspection openings orby other means (if possible)

x

1.3 External survey of gearhousing, propeller blades, boltslocking and other fastening ar-rangements

x x

1.4 Survey of external pipingsystems x x

2. Function testing2.1 Sealing arrangements x x

2.2 Lubrication and hydraulicoil system x x

2.3 CP mechanism x x2.4 Test of thruster unit includ-ing alarm system x x

3. Internal surveyBearings, gear and shafts andother relevant parts

x 2)

1) It is advised to take oil analysis prior to docking for (bottom) survey inorder to ensure that there is no need for opening of the thruster (e.g. wa-ter in the oil).

2) Only if any indications of abnormalities are observed. Satisfactorymaintenance according to manufacturer recommendations to be docu-mented and considered as a base for extent of possible opening.


DET NORSKE VERITAS

K 300 Tailshaft condition monitoring survey arrange-ment301 See Sec.1 B502 to B507.

L. Boiler and Steam Heated Steam GeneratorSurvey

L 100 Renewal survey101 The survey is normally to include:

— internal and external examination of the boilers, super-heaters, economizers and air preheaters or steam heatedsteam generator, including drums, stays, pipes, insulationetc.

— internal examination of all mountings— setting of safety valves including remote operation of

same, except that for exhaust gas boilers the safety valvesmay be set by the chief engineer and the result reported tothe Society

— examination and testing of instrumentation and automa-tion equipment

— examination and testing of attached fuel oil burning equip-ment.

102 If found necessary, the surveyor may require hydraulictest, thickness measurements and/or crack detection test of anypart of the installation.

M. Thermal Oil Heater Survey

M 100 Renewal survey101 The survey is normally to include:

— tightness test of the installation with special attention toflange connections and valve and pump packings

— external examination of coils in the oil fired furnace— testing of thermal oil-flow and pressure drop across the

heater including comparison with reference data from theheater as new. Significant increase in flow resistanceacross the furnace coils will require internal cleaning ofthe coils

— examination and testing of plant instrumentation includingregulation and safety systems

— examination and setting of liquid relief valves— examination of fuel oil equipment including burners with

nozzles— examination of fire extinguishing system with release ar-

rangements for the thermal oil installation including fur-nace

— analysis of thermal oil samples from the system in order toestablish safe operating temperature and state of deteriora-tion

— function test of plant with special attention to stability ofautomatic regulating systems.

N. Thrusters for Propulsion

N 100 Definitions101 Thrusters for propulsion are defined as thrusters whichare assigned for propulsion or propulsion and steering of thevessel during sea voyage.

Guidance note:Thrusters installed to achieve redundant main propulsion sys-tems are to be regarded as thrusters for propulsion.


102 Thrusters for dynamic positioning are thrusters incorpo-rated in systems for dynamic positioning of ships, which havebeen granted the additional class notation AUTS, AUT,AUTR or AUTRO, see Sec.4 I200.

103 Water jets are defined in Pt.4 Ch.5 Sec.2.

104 Thrusters for other purposes than specified in 101 to 103are defined as auxiliary thrusters.

N 200 Extent of survey and testing201 Thrusters for propulsion are to be surveyed as per TableN1 as applicable.

202 Thrusters for dynamic positioning are to be surveyed asper Table N1 as far as applicable.

203 Auxiliary thrusters are to be surveyed as specified inJ306.

204 For extent of survey of water jets, see Rules for Classi-fication of HS, LC and NSC Pt.7 Ch.2 Sec.2, if applicable.

Guidance note:Azimuth thrusters providing the main steering function are to besurveyed and tested annually as part of the annual survey, seeB600.


O. Radio Communication Equipment

O 100 Application101 The survey requirements given in 200 apply to all con-vention ships.

O 200 Radio safety, GMDSS, renewal survey

201 The following is to be checked on board during survey:

— radio operator's certificate of competency— radio log book entries.

202 The following is to be surveyed or tested as applicable:

— maintenance of equipment— main, emergency and reserve source of energy— uninterruptible power supply (UPS) and automatic charg-

ers— VHF radio installation— MF radiotelephony installations— MF/HF radio installation— ship earth station (SES)— freefloat emergency EPIRB, and two-way radiotelephone

apparatus for survival craft

Table N1 Extent of surveys and tests of propulsion thrustersand dynamic positioning thrusters

Survey and testsSurvey interval

2.5 years 5 years1. Intermediate surveyincludes survey of internals through inspec-tion openings, also in underwater housing.

x

2. Complete internal survey 2)

includes visual inspection of relevant parts,and NDT when necessary

x

3. Function testing3.1 Sealing arrangement x x

3.2 Lubricating and hydraulic oil system x x3.3 Test of thruster unit including alarm sys-tem x x

1) The survey interval may be extended by 2.5 years provided runninghours since last complete survey is less than 15 000 hours and an inter-mediate survey is carried out.


DET NORSKE VERITAS

— fadar responders— Navtex, ECG and watch receivers, and HF direct receiver— two-tone alarm generator.

P. Safety Equipment, Renewal Survey

P 100 Application

101 The survey requirements given in 200 apply to all con-vention ships.

P 200 Fire safety, lifesaving and navigation equipment

201 The following documents are to be available onboard inaddition to those given in B801:

— certificates for navigation lights— certificates for lifeboat falls— service and weighting report for CO2/Halon

— report on check of foam samples and dry powder samples,as applicable

— report on pressure testing of self-contained breathing ap-paratus bottles, and air bottles for covered lifeboat, as ap-plicable

— nautical charts, up to date— required publications on bridge— display of auto pilot instructions— change-over procedure for steering gear (posted)— operating instruction for survival craft— instructions for on board maitenance of equipment— training manual— liferaft launching instruction (posted)— instruction and notices (posted)— instruction for maintenance and operation of all fire fight-

ing equipment.

202 The log book is to be examined as required in B802.

203 The safety equipment is to be surveyed and tested as re-quired in B803.


DET NORSKE VERITAS

SECTION 3SURVEY EXTENT — ADDITIONAL CLASS. SPECIAL SERVICE AND TYPE

NOTATIONS

A. Passenger Ships

A 100 Application101 The requirements in A apply to ships with class nota-tions:

Passenger ShipCar Ferry A (or B)Train Ferry A (or B)Car and Train Ferry A (or B).

A 200 Annual survey201 The requirements are to be regarded as supplementary tothose given for the main class.

202 The following is to be surveyed and tested as applicable:

— hull and machinery— stability and watertightness— fire protection and ventilation— means of escape— fire fighting equipment— life saving appliances and arrangements— navigational equipment— documentation and information, such as:

— required certificates for navigational aids— nautical publications— service reports for lifesaving equipment— service reports for inspection of fire fighting equip-

ment— fire control and muster lists— training manual— operating and maintenance instructions— log book entries.

203 Ships arranged for carriage of motor vehicles with fuelin their tanks for own propulsion are to be surveyed as requiredin E.

A 300 Bottom survey301 A bottom survey is to be carried out annually. For thetwo surveys required to be carried out in dry dock in each fiveyear period, the requirements in Sec.2 J 100 and 300 apply. Forthe three other surveys the survey extent may be limited to anoutside inspection of the ship's bottom and underwater parts.This inspection may be carried out while the ship is afloat.

During such surveys the following conditions are normally tobe satisfactorily fulfilled:

— the water conditions at the location of the survey are to besatisfactory with respect to visibility, current, swell etc.

— if a diving company is used in the survey, the companymust be approved and are to use pictorial equipment ofsuch quality that the surveyor is fully satisfied with the in-formation relayed to him

— location of possible damages to be ascertained.

If the in-water survey reveals damage or deterioration that re-quires early attention, the surveyor may require that the ship bedrydocked in order that a detailed survey can be undertakenand the necessary repairs carried out.

A 400 Lightweight survey401 For ships that are engaged on international voyages, alightweight survey is to be carried out, as described in Pt.3

Ch.4 Sec.5 B, to verify any changes in lightship displacementand longitudinal centre of gravity. The ship is to be re-inclinedwhenever, in comparison with the approved stability informa-tion, a deviation from the lightship displacement exceeding 2%or a deviation of the longitudinal centre of gravity exceeding1% of L is found or anticipated.

B. Container Carriers

B 100 Application

101 The requirements in B apply to ships with class notation:

Container Carrier.

B 200 Annual survey

201 The survey is normally to include examination of thefollowing components, arrangements and documents:

— permanent supporting fittings and structures for the con-tainer stowage and securing

— equipment for stowing and securing of containers in holdsand on weather deck

— instructions (manual) and instrument (as furnished) forstowing and securing of the containers.

202 For container carriers enrolled with alternative surveyscheme, ISP, as given in Sec.1 B400, an annual survey is re-quired as given in Sec.2 B206.

C. Car Carriers

C 100 Application

101 The requirements in C apply to ships with class notation:

Car Carrier.

C 200 Annual survey

201 The survey is to include fire prevention, detection andextinction arrangements and equipment to the extent requiredin E, and movable car decks to the extent required in D, as faras applicable.

D. Movable Car Decks

D 100 Application

101 The requirements in D apply to ships with class notation:

MCDK.

D 200 Annual survey

201 The survey required is normally to include examinationof the following components and arrangements:

— pontoon racks on deck including lashing arrangements— stowing arrangements in cargo holds— drainage arrangements in pontoon storage areas— pontoon conditions— handling arrangement.


DET NORSKE VERITAS

E. Arrangement for Carriage of Motor Vehicleswith Fuel in their Tanks for their own Propul-

sion

E 100 Application101 The requirements in E apply to ships arranged for car-riage of motor vehicles with fuel in their tanks for their ownpropulsion, including ships with class notation:

PET.

E 200 Annual survey201 The survey required is normally to include examinationof the following components and systems:

— automatic fire alarm system in cargo holds— fixed fire extinguishing system in cargo holds— portable fire extinguishers in cargo holds and at cargo hold

entrances— ventilation system in cargo holds including remote indica-

tors on bridge— electrical equipment in cargo holds, if fitted— signboards.

F. Dry Bulk Cargo Ships

F 100 Application101 The requirements in F apply to seagoing self-propelleddry cargo ships with class notations:

Bulk Carrier ESPOre Carrier ESP.

102 For areas in cargo holds and ballast tanks where originalcoatings are found to be in GOOD condition as defined inSec.2 A109, the extent of close-up examination as given for theannual, intermediate and complete periodical surveys, may beespecially considered. The same applies when cargo holds andballast tanks have been re-coated (by epoxy coating or equiva-lent, alternatively a type approved coating, e.g. semi-hard orsimilar), provided that the present coating condition of the con-sidered area is in GOOD condition and that documentation isavailable stating that:



103 The extent of thickness measurements as given for theannual, intermediate and complete periodical surveys, may beespecially considered provided the surveyor is satisfied by theclose-up examination, that there is no structural strength reduc-tion, and the corrosion protection system where applied re-mains effective with coatings in GOOD condition as given in102.

F 200 Annual survey201 The requirements given in Sec.2 B apply with the addi-tions and amendments given in 203 to 205

202 Prior to inspection, the surveyor is to examine the docu-mentation onboard as specified in Sec.1 C300, and its contentsas a basis for the survey.

203 Examination of cargo holds and piping

For ships over 10 years of age:

a) Overall examination of all cargo holds.

b) Close-up examination of sufficient extent, minimum 25%of frames, in a forward cargo hold. This in order to estab-lish the condition of the lower region of the shell frames,

including approximately lower 1/3 length of side frame atside shell, side frame end attachment and the adjacent shellplating.

Where this level of survey reveals need for remedial meas-ures, the survey is to be extended to include a close-up ex-amination of all shell frames and adjacent shell plating ofthe cargo hold, as well as a close-up examination of suffi-cient extent of all remaining cargo holds.

For ships over 15 years of age:


b) Close-up examination of sufficient extent, minimum 25%of frames, in a forward cargo hold and one other selectedcargo hold. This in order to establish the condition of thelower region of the shell frames, including approximatelylower 1/3 length of side frame at side shell, side frame endattachment and the adjacent shell plating.

Where this level of survey reveals need for remedial meas-ures, the survey is to be extended to include a close-up ex-amination of all shell frames and adjacent shell plating ofthat cargo hold, as well as close-up examination of suffi-cient extent of all remaining cargo holds.

c) All piping and penetrations in cargo holds, including over-board piping, shall be examined.

204 When considered necessary by the surveyor, thicknessmeasurements are to be carried out. If the result of the thick-ness measurements indicate substantial corrosion, as definedin Sec.2 A107, the extent of the measurements is to be in-creased in accordance with Table F3. For areas recorded withsubstantial corrosion at previous surveys, the requirementsgiven in Sec.2 B apply. The extent of thickness measurementsis to be increased in accordance with Table F3.

205 Examination and testing of hatch covers and coamingsare to be carried out including:

Examination, as applicable of:

a) Where mechanically operated steel covers are fitted:

— hatch covers including close-up examination of hatchcover plating

— tightness devices of longitudinal, transverse and inter-mediate cross junctions (gasket, gasket lips, compres-sion bars, drainage channels)

— clamping devices, retaining bars, cleating— chain or rope pulleys— guides— guide rails and track wheels— stoppers etc.— wires, chains, gypsies, tensioning devices— hydraulic system essential to closing and securing— safety locks and retaining devices.

Where portable covers, wooden or steel pontoons are fit-ted:

— wooden covers and portable beams, carriers or socketsfor the portable beams, and their securing devices

— steel pontoons, including close-up examination ofhatch cover plating

— tarpaulins— cleats, battens and wedges— hatch securing bars and their securing devices— loading pads or bars and the side plate edge— guide plates and chocks— compression bars, drainage channels and drain pipes.

b) Examination of hatch coaming plating and their stiffenersincluding close-up examination as deemed necessary bythe surveyor.


DET NORSKE VERITAS

c) Testing at random of the operation of mechanically oper-ated hatch covers including:

— stowage and securing in open condition— proper fit and efficiency of sealing in closed condition— hydraulic and power components, wires, chains and

link drives.

F 300 Intermediate survey

301 The requirements given in Sec.2 C and 202 apply withthe additions and amendments given in 302 to 304.

302 For ships exceeding 5 years of age:

Examination of cargo holds:


b) Close-up examination of sufficient extent, minimum 25%of shell frames, is to be carried out to establish the condi-tion of:

— shell frames including their upper and lower end at-tachments, adjacent shell plating and transverse bulk-heads in the forward cargo hold and one other selectedcargo hold

— where considered necessary by the surveyor as a resultof the overall and close-up examination, the survey isto be extended to include close-up examination of allshell frames and adjacent shell plating of that cargohold as well as close-up examination of sufficient ex-tent of all remaining cargo holds.

Thickness measurement is to be carried out to an extent suffi-cient to determine both general and local corrosion levels at ar-eas subject to close-up examination. If the result of thethickness measurements indicate substantial corrosion as de-fined in Sec.2 A107, the extent of the measurements is to be in-creased in accordance with Table F3.


Examination of cargo holds:


b) Close-up examination of sufficient extent, minimum 25%of shell frames, is to be carried out to establish the condi-tion of:

— shell frames including their upper and lower end at-tachments, adjacent shell plating and transverse bulk-heads of all cargo holds

— where considered necessary by the surveyor as a resultof the overall and close-up examination, the survey isto be extended to include close-up examination of allshell frames and adjacent shell plating of all cargoholds.

Close-up examination of ballast wing tanks in ore carriers:

— all web frame rings - in one ballast wing tank— one deck transverse - in each of the remaining ballast wing

tanks— both transverse bulkheads - in one ballast wing tank— one transverse bulkhead - in each remaining ballast wing

tank.

Thickness measurement is to be carried out to an extent suffi-cient to determine both general and local corrosion levels at ar-eas subject to close-up examination. If the result of thethickness measurements indicate substantial corrosion as de-fined in Sec.2 A107, the extent of the measurements is to be in-creased in accordance with Table F3.


The requirements of the intermediate survey shall be to thesame extent as the previous complete periodical survey as re-quired in 403 to 410 and relevant additional requirements forsingle side skin bulk carriers as given in F500.

However, testing of ballast tanks is not required unless deemednecessary by the surveyor.

In lieu of the requirements in 403, an in-water survey may beconsidered as equivalent.

F 400 Complete periodical survey401 The complete periodical survey is to be carried out con-currently with the renewal surveys required for hull and ma-chinery as given in Sec.2 D and E and in accordance with theadditions and amendments given in 402 to 410.


DET NORSKE VERITAS

Note:

Close-up examination of transverse bulkheads is be carried outat four levels:

Level a) Immediately above the inner bottom and immedi-ately above the line of gussets (if fitted) and shed-ders for ships without lower stool.

Level b) Immediately above and below the lower stool shelfplate (for those ships fitted with lower stools), andimmediately above the line of the shedder plates.

Level c) About mid-height of the bulkhead.Level d) Immediately below the upper deck plating and im-

mediately adjacent to the upper wing tank, and im-mediately below the upper stool shelf plate for thoseships fitted with upper stools, or immediately belowthe topside tanks.

402 A specific survey programme is to be worked out as de-scribed in Sec.1 C.

403 An examination of the ship in dry dock is to be a part ofthe complete periodical survey.

404 An overall examination is to be carried out on hull struc-ture and piping systems in way of all cargo holds and ballasttanks and in way of all cofferdams, pipe tunnels and void spac-es within the cargo area.

405 The requirements for close-up examinations are given inTable F1.

406 The surveyor may extend the close-up examination asdeemed necessary taking into account the maintenance of thehull structures under survey, the condition of the corrosionprotection system and also in the following cases:

— structural arrangements or details which have suffered de-fects in similar tanks/holds or on similar ships according toavailable information

— in tanks which have structures approved with reducedscantlings due to an approved corrosion control system.

407 The requirements for thickness measurements are givenin Table F2. Transverse sections should be chosen where thelargest reductions are suspected to occur or are revealed fromdeck plating measurements.

408 The surveyor may extend the thickness measurements asdeemed necessary.

If the result of the thickness measurements indicate substantialcorrosion as defined in Sec.2 A107, the extent of the measure-ments is to be increased in accordance with Table F3.

409 All boundaries of ballast tanks and cargo holds used forballast are to be pressure tested by filling with water.

Generally, the pressure should correspond to a water level tothe top of hatches for ballast and cargo holds or top of air pipesfor ballast tanks, if this gives a higher pressure.

410 A thorough examination of hatch covers and coamingsof items given in 205 is to be carried out including:

a) Testing of the operation of all mechanically operated hatchcovers including:

— stowage and securing in open condition— proper fit and efficiency of sealing in closed condition— hydraulic and power components, wires, chains and

link drives.

b) Testing the effectiveness of sealing arrangement of allhatch covers by hose testing or equivalent.

c) Thickness measurement of the hatch cover and coamingplating and stiffeners according to Table F2.

Table F1 Minimum requirement for close-up examination at complete periodical hull surveys of dry bulk cargo shipsComplete periodical

survey no. 1Age ≤ 5

Complete periodicalsurvey no. 25 < Age ≤ 10

Complete periodicalsurvey no. 3

10 < Age ≤ 15

Complete periodicalsurvey no. 4 and subsequent

Age > 151.25% of frames in the forward car-go hold at representative posi-tions.

Selected frames in remaining car-go holds.

1.25% of shell frames in all cargoholds, including upper and lowerend attachments and adjacentshell plating.

1.All shell frames in the forwardcargo hold and 25% of frames inall remaining cargo holds, includ-ing upper and lower end attach-ments and adjacent shell plating.

1.All shell frames in all cargo holds,including upper and lower end at-tachments and adjacent shell plat-ing.

2.One transverse web with associat-ed plating and longitudinals intwo representative ballast tanks ofeach type (i.e. topside, hopperside or side tank).

2.One transverse web with associat-ed plating and longitudinals ineach ballast tank (i.e. topside,hopper side or side tank).

2.All transverse webs with associat-ed plating and longitudinals ineach ballast tank (i.e. topside,hopper side or side tank).

2.As for complete periodical surveyno. 3.

3.Two selected cargo hold trans-verse bulkheads, including inter-nal structure of upper and lowerstools, where fitted.

3.Forward and aft transverse bulk-head in one side ballast tank, in-cluding stiffening system.

3.All transverse bulkheads in bal-last tanks, including stiffeningsystem.


4.All cargo hold hatch covers andcoamings.




5.One transverse bulkhead in eachcargo hold, including internalstructure of upper and lowerstools, where fitted.

5.All cargo hold transverse bulk-heads, including internal structureof upper and lower stools, wherefitted.


6.Selected areas of deck plating in-side line of hatch openings be-tween cargo hold hatches.

6.All deck plating inside line ofhatch openings between cargohold hatches.



DET NORSKE VERITAS

Table F2 Minimum requirement of thickness measurement at complete periodical hull surveys of dry bulk cargo shipsComplete periodical




10 < Age ≤ 15


Age > 151.Suspect Areas

1.Suspect Areas

1.Suspect Areas

1.Suspect Areas

2.Within the cargo length area:

a) Two transverse sections ofdeck plating outside line ofcargo hatch openings.


a) Each deck plate outside lineof cargo hatch openings.

b) Two transverse sections,whereof one in the amidshiparea, outside line of cargohatch opening.


a) Each deck plate outside lineof cargo hatch openings.

b) Three transverse sections,whereof one in the amidshiparea, outside line of cargohatch opening.

c) Each bottom plate.3.Measurement, for general assess-ment and recording of corrosionpattern, of those structural mem-bers subject to close-up examina-tion according to Table F1.



4.Wind and water strakes in way ofthe transverse sections consideredunder 2.

4.All wind and water strakes withinthe cargo length area.


5.Selected wind and water strakesoutside the cargo length area.


6.See 500 for additional thicknessmeasurement guidelines applica-ble to the vertically corrugatedtransverse watertight bulkheadbetween cargo holds Nos.1 and 2on ships subject to compliancewith the requirements given inCh.1 Sec.3 E.



DET NORSKE VERITAS

Table F3 Requirements for extent of thickness measurements at those areas of substantial corrosion. Complete periodical survey ofbulk carriers within the cargo area

Structural member Extent of measurement Pattern of measurementShell plat-ing

1.Bottom and side shell plating

a) Suspect plate, plus four adjacentplates

b) See other tables for particulars ongauging in way of tanks and cargoholds

a) 5 point pattern for each panel be-tween longitudinals

2.Bottom/Side Shell longitudinals

Minimum of three longitudinals in wayof Suspect Areas

3 measurements in line across web3 measurements on flange

Transversebulkheadsin cargoholds

1.Lower stool

a) Transverse band within 25 mm ofwelded connection to innerbottom

b) Transverse band within 25 mm ofwelded connection to shelf plate

a) 5 point between stiffeners over 1 mlength

b) Ditto

2.Transverse bulkhead

a) Transverse band within 250 mm oftop of shedder plate or hopper plate

b) Transverse band at approximatelymid height

c) Transverse band at part of bulkheadadjacent to upper deck or below up-per stool shelf plate (for those shipsfitted with upper stools)

a) 5 point pattern over 1 m2 of plating

b) 5 point pattern over 1 m2 of plating

c) 5 point pattern over 1 m2 of plating

Deck struc-ture, includ-ing hatchcovers andcoamings

1.Cross deck strip plating

Suspect cross deck strip plating a) 5 point pattern between underdeckstiffeners over 1 m length

2.Underdeck stiffeners

a) Transverse members

b) Longitudinal member

a) 5 point pattern at each end and midspan

b) 5 point pattern on both web andflange

3.Hatch covers

a) Skirt each side and ends, 3 locations

b) 3 longitudinal bands, outboardstrakes (2) and centerline strake(1)

a) 5 point pattern at each location

b) 5 point measurement each band

4.Hatch coamings

Each side and end of coaming, one bandlower 1/3, one band upper 2/3 of coaming

5 point measurement each band i.e. endor side coaming

5.Topside water ballast tanks

a) Watertight transverse bulkheads

i) lower 1/3 of bulkhead

ii) upper 2/3 of bulkhead

iii) stiffeners

b) 2 representative swash transversebulkheads

i) lower 1/3 of bulkhead

ii) upper 2/3 of bulkhead

iii) stiffeners

c) 3 representative bays of slope plat-ing

i) lower 1/3 of tank

ii) upper 2/3 of tank

d) Longitudinals, suspect and adjacent

a)

i) 5 point pattern over 1 m2 ofplating

ii) 5 point pattern over 1 m2 ofplating

iii) 5 point pattern over 1 m length

b)



iii) 5 point pattern over 1 m length

c)



d) 5 point pattern both web and flangeover 1 m length

6.Main deck plating

Suspect plates and adjacent (4) 5 point pattern over 1 m2 of plating

7.Main deck longitudinals

Minimum of 3 longitudinals where plat-ing measured

5 point pattern on both web and flangeover 1 m length

8.Web frames/transverses

Suspect plates 5 point pattern over 1 m2


DET NORSKE VERITAS

F 500 Additional requirements for single side skin bulkcarriers501 For ships required to comply with the requirements giv-en in Ch.1 Sec.3 E, additional thickness measurements are tobe carried out of the vertically corrugated transverse watertightbulkhead between cargo holds Nos. 1 and 2, as applicable.

The thickness measurements are to be carried out prior to therelevant compliance deadline given in Ch.1 Sec.3 E, i.e. at in-termediate or complete periodical surveys, as applicable, andat subsequent complete periodical surveys or in some cases onthe date on which the ship reaches 15 or 17 years of age.

The thickness measurements are to be carried out as given in502 in order to determine the general condition of the structureand to define the extent of possible repairs and/or reinforce-ments of the bulkhead.

502 The thickness measurements are to be carried out at thelevels described below. To adequately assess the scantlings ofeach individual vertical corrugation, each corrugation flange,web, shedder plate and gusset plate within each of the levelsgiven below are to be thickness measured:

— the mid-breadth of each corrugation flange and web at ap-proximately 200 mm above the top of shedder plates andtop of hopper plates

— the middle of each gusset plate, if fitted— the middle of each shedder plate— the mid-breadth of each corrugation flange and web at ap-

proximately 200 mm below upper stool, if fitted— the mid-breadth of the corrugation flange and web at about

the mid-height of the corrugation— the mid-breadth of the corrugation flanges and webs below

the upper stool, (see Fig. 2) if applicable, as deemed nec-essary by the surveyor.

Where the thickness changes, within the horizontal levels, thethinner plate is to be thickness measured. Steel renewal and/orreinforcement is to comply with the requirements in Ch.1Sec.3 E.

Fig. 1Hold profile, ships without lower stool

Fig. 2Hold profile, ships with lower stool

503 For ships not complying with the requirements for dam-age stability in flooded condition as given in Ch.1 Sec.3 K, i.e.for ships meeting all the following conditions:

— 150 m in length and upwards of single skin construction— carrying solid bulk cargoes having a density of 1780 kg/

m3 and above— contracted for construction before 1 July 1999— constructed with an insufficient number of transverse wa-

tertight bulkheads to enable them to withstand flooding ofthe foremost cargo hold in all loading conditions and re-main afloat in a satisfactory condition of equilibrium asspecified in SOLAS reg. XII/4.3,

the following additional requirements are to be complied with:

Double bot-tom andhopperstructure

1.Inner and double bottom plating

Suspect plate plus all adjacent plates 5 point pattern for each panel betweenlongitudinals over 1 m length

2.Inner and double bottom longitudinals

Three longitudinals where plates meas-ured

+ 3 measurements in line across web and3 measurements on flange

3.Longitudinal girders or transverse floors

b) Suspect plates b) 5 point pattern over about 1 m2

4.Watertight bulkheads (WT floors)

a) lower 1/3 of tank

b) upper 2/3 of tank

a) 5 point pattern over 1 m2 of plating

b) 5 point pattern alternate plates over 1m2 of plating

5.Web frames

Suspect plate 5 point pattern over 1 m2 of plating

6.Bottom and shell longitudinals

Minimum of three longitudinals in wayof suspect area

a) 3 measurements in line across web

b) 3 measurements on flangeCargo holds 1.

Side shell framesSuspect frame and each adjacent frame a) At each end and mid span:

5 point pattern of both web andflange

b) 5 point pattern within 25 mm ofwelded attachment to both shell andlower slope plate

Table F3 Requirements for extent of thickness measurements at those areas of substantial corrosion. Complete periodical survey ofbulk carriers within the cargo area (Continued)

Structural member Extent of measurement Pattern of measurement


DET NORSKE VERITAS

— extent of annual examination of the foremost cargo hold:

For ships exceeding 5 years of age:

Close-up examination of sufficient extent, minimum 25% ofshell frames, is to be carried out to establish the condition of:

— shell frames including their upper and lower end attach-ments, adjacent shell plating and transverse bulkheads

— where considered necessary by the surveyor as a result ofthe overall and close-up examination, the survey is to beextended to include close-up examination of all shellframes and adjacent shell plating.

The thickness measurement is to be carried out to an extentsufficient to determine both general and local corrosion levels,at areas subject to close-up examination. If the result of thethickness measurements indicate substantial corrosion, as de-fined in Sec.2 A107, the extent of the measurements is to be in-creased in accordance with Table F3.

The thickness measurement may be dispensed with providedthe surveyor is satisfied by the close-up examination that thereis no structural diminution and the protective coating, whereapplied, remains effective.

For ships exceeding 15 years of age:

Close-up examination of sufficient extent is to be carried out toestablish the condition of:

— all shell frames including their upper and lower end attach-ments, adjacent shell plating and transverse bulkheads.

Thickness measurement is to be carried out to an extent suffi-cient too determine both general and local corrosion levels, atareas subject to close-up examination. If the result of the thick-ness measurements indicate substantial corrosion, as definedin Sec.2 A107, the extent of the measurements is to be in-creased in accordance with Table F3.

The thickness measurement may be dispensed with providedthe surveyor is satisfied by the close-up examination that thereis no structural diminution and the protective coating, whereapplied, remains effective.

At complete periodical surveys the cargo hold bilge well highwater level alarm and water ingress detectors are to be testedin order to verify compliance with Ch.1 Sec.3 K.

G. Oil Carriers

G 100 Application101 The requirements in G apply to self-propelled oil tankerswith class notations:

Tanker for Oil ESPTanker for Oil Products ESP.

102 For areas in tanks where original coatings are found tobe in GOOD condition, as defined in Sec.2 A109, the extent ofclose-up examination, as given for the periodical surveys, maybe especially considered. The same applies when tanks havebeen re-coated (by epoxy coating or equivalent, alternatively atype approved coating, e.g. semi-hard or similar), providedthat the present coating condition of the considered area is inGOOD condition and that documentation is available statingthat:



103 The extent of thickness measurements, as given for theperiodical surveys, may be especially considered provided the

surveyor is satisfied by the close-up examination, that there isno structural strength reduction, and the corrosion protectionsystem where applied remains effective with coatings inGOOD condition as given in 102.

G 200 Annual survey (cargo containment)201 The requirements given in Sec.2 B apply with the addi-tion of examination of systems and parts specified in 203 to208 taking into account the service history, condition and ex-tent of the corrosion prevention systems of ballast tanks and ar-eas identified in the survey report file.


203 For areas recorded with substantial corrosion at previ-ous surveys, the requirements given in Sec.2 B apply. The ex-tent of thickness measurements is to be increased inaccordance with Table G4.

204 A general examination of:

— cargo tank openings and pressure/vacuum valves— piping systems (cargo, crude oil washing, bunker, ballast,

steam, ventilation etc.)— electrical cables and equipment in gas dangerous zones

and spaces.

205 Pump rooms and pipe tunnels are to be examined withspecial attention to:

— piping systems with pumps— tightness of bulkheads, gland seals etc.— bilge system— ventilation— electrical cables and equipment— access ladders.

206 Inert gas systems are to be examined with special atten-tion to:

— piping with components for signs of corrosion, or gas- oreffluent leakage

— blowers— scrubber— deck water seal— non-return valves— remotely operated or automatically controlled valves— interlocking features of soot blowers— alarms and safety devices.

207 Combination ships required to be fitted with protectedslop tank are to be examined with special attention to:

— gas detection arrangement in cofferdams— oxygen control equipment— inert gas arrangement (as specified in 206)— closing arrangement for hatches and other slop tank open-

ings— blanking arrangement for slop tank pipes— required signboards and instruction manuals.

208 Examination of the emergency towing arrangements are,as far as practicable, to be carried out. Aft towing arrangementis to be confirmed as pre-rigged and forward chafing gear is tobe confirmed as stowed in such a way that it can be rapidlyconnected to the strongpoint. Where light is provided on pick-up gear marker buoy, proper functioning is to be confirmed.


All ballast tanks adjacent to (i.e. with a common plane bound-ary) a cargo tank with any means of heating are to be examinedinternally. When considered necessary by the surveyor, thick-ness measurements are to be carried out and if these thicknessmeasurements indicate that substantial corrosion is found, the


DET NORSKE VERITAS

extent of thickness measurements is to be increased in accord-ance with Table G4.

Tanks or areas where coating was found to be in GOOD con-dition as defined in Sec.2 A109 at the previous intermediate orcomplete periodical survey may be specially considered by theSociety.

G 300 Annual survey (oil pollution prevention)

301 The survey requirements given in 302 to 307 are appli-cable to convention ships.

302 The following documents regarding pollution preven-tion are to be surveyed:

— International Oil Pollution Prevention certificate's validity— certificates for type approved oily water separating equip-

ment, process unit and oil content meter— entries in oil record book— operation manual for CBT, when applicable— operation manual for ODM.

303 Deck foam system is to be examined with attention tophysical and chemical condition of foam concentrate.

304 Segregated ballast tanks

Segregation between cargo and segregated ballast system is tobe confirmed.

Restrictions in use and arrangement for portable spool pieceare to be verified.

Ballast tanks are to be sighted and confirmed free of oil con-tamination.

305 Dedicated clean ballast tanks

The dedicated clean ballast tanks are to be confirmed free of oilcontamination.

306 Retention of oil on board

The oily water interface detector is to be surveyed.

Oil discharge monitoring and control system and equipmentare to be surveyed externally.

307 Pumping, piping and discharge arrangements

Piping system for dirty ballast (if fitted) and means of drainingcargo pumps and -lines are to be surveyed, and communicationbetween observation and discharge control position are to betested.

G 400 Intermediate survey (cargo containment)

401 The requirements given in 200 and in Sec.2 C apply withthe additions and amendments given in 402 to 407.

402 For weather decks, an examination as far as applicableof cargo, crude oil washing, bunker, ballast, steam and ventpiping systems as well as vent masts and headers. If upon ex-amination there is any doubt as to the condition of the piping,the piping may be required to be pressure tested, thicknessmeasured or both.

403 For those tanks subject to the survey, special attention isto be given to:

— cargo piping passing through ballast tanks— bilge and ballast piping passing through cargo tanks— air and sounding piping to ballast tanks passing through

cargo and ballast tanks— fuel pipes passing through ballast tanks.

404 Electrical cables and equipment installed in gas danger-ous zones and spaces are to be insulation resistance measured.The measurements may be omitted provided a record of testingis available showing that measurements have been taken dur-ing the last 12 months and that the results are satisfactory.

Insulation monitors with alarms are to be function tested, if in-stalled.

Guidance note:Megger testing of cables and equipment in cargo area may becarried out only when gas free certificate is issued for the vessel.



— an overall examination of at least two representative cargotanks is to be carried out

— an overall examination of all combined cargo and ballasttanks is to be carried out

— close-up examination is to be carried out to the followingextent:

— ballast tanks: to the same extent as previous completeperiodical survey

— cargo tanks: at least two combined cargo and ballasttanks. The extent of survey should be based on therecord of the previous complete periodical survey, andrepair history of the tanks.


The requirements of the intermediate survey shall be to thesame extent as the previous complete periodical survey as re-quired in 603 to 611, 614 and 615.

However, testing of cargo and ballast tanks is not required un-less deemed necessary by the surveyor.


407 The extent of close-up examinations may be extended asstated in 606.

G 500 Intermediate survey (oil pollution prevention)

501 The survey requirements given in 502 apply to conven-tion ships.

502 The following is to be surveyed in addition to require-ments given in 302 to 307:

— oily water separating equipment and oil filtering equip-ment or process unit

— crude oil piping outside cargo tanks, and operation of iso-lating valves to steam heaters when fitted

— two cargo tanks with regard to effectiveness of crude oilwashing

— oil discharge monitoring and control system and oil con-tent meter and calibration

— satisfactory operation of oil and water interface detector.

G 600 Complete periodical survey (cargo containment)

601 The complete periodical survey required for cargo con-tainment system of oil tankers is to be carried out concurrentlywith the renewal surveys required for hull and machinery asgiven in Sec.2 D and E and in accordance with the require-ments given in 201 to 208 and 401 to 407 with the additionsand amendments given in 602 to 620.



604 An overall examination is to be carried out on hull struc-ture and piping systems in way of all cargo and ballast tanksand in way of all pump rooms, cofferdams, pipe tunnels andvoid spaces within the cargo area.

605 The requirements for close-up examinations at completeperiodical survey are given in Table G1.


DET NORSKE VERITAS

606 The surveyor may extend the close-up examination asdeemed necessary taking into account the maintenance of thetanks under survey, the condition of the corrosion protectionsystem and also in the following cases:

— in particular, tanks having structural arrangements or de-tails which have suffered defects in similar tanks or onsimilar ships according to available information

— in tanks which have structures approved with reducedscantlings due to an approved corrosion control system.

607 The requirements for thickness measurements at com-plete periodical survey are given in Table G2.

Transverse sections should be chosen where the largest reduc-tions are suspected to occur or are revealed from deck platingmeasurements.

In cases where two or three sections are to be measured, at leastone should include a ballast tank within 0.5 L amidship, alter-natively, within the cargo length area, as applicable.

608 Where substantial corrosion as defined in Sec.2 A107 isfound, the extent of thickness measurements is to be increasedin accordance with Table G4, or as specified in the survey pro-gramme.


610 The minimum requirements for tank testing at completeperiodical survey are given in Table G3.

Generally, the pressure should correspond to a water level tothe top of access hatches for cargo tanks, or top of air pipes forballast tanks, if this gives a higher pressure.

611 The surveyor may extend the tank testing as deemednecessary.

612 For ships having inert gas plant the components and sys-tems are to be surveyed as specified in Table G5.

It is to be verified that pipe blanking arrangements, portableO2-analyzers and required signboards and instructions are onboard and in order.

613 For ships having protected slop tank every survey of thistank is to be held concurrently with the inert gas plant survey.

614 Heating coils, tank cleaning apparatus and other equip-ment in cargo tanks, cofferdams and pipe tunnels within thecargo area are to be examined. Heating coils are normally to bepressure tested. Attachments of sacrificial anodes in tanks areto be examined.

615 Cargo piping on deck, including crude oil washing(COW) piping and cargo and ballast piping within cargo tanks,ballast tanks, including double bottom tanks, pump rooms,pipe tunnels, cofferdams and void spaces bounding cargotanks, decks and outer hull are to be examined and operation-ally tested to working pressure, to the surveyor's satisfaction toensure that tightness and condition remain satisfactory, supple-mented by thickness measurement at random if deemed neces-sary by the surveyor. In addition to requirements given in Sec.2D, special attention is to be given to any ballast piping in cargotanks and any cargo piping in ballast tanks and void spaces andsurveyors are to be advised on all occasions when this piping,including valves and fittings are open during repair periods andcan be internally examined.

616 Cargo pumps, together with the pumps’ prime moversare to be surved as specified in Sec.2 E100.

617 Ventilation arrangements, including fans, for cargotanks, pump rooms and other gas dangerous spaces are to besurveyed.

618 If fitted, bow loading and unloading arrangements are tobe surveyed.

619 For ships having boilers burning crude oil or slop, sur-vey and testing of control equipment including monitoring sys-tems and shut down functions related to the following systemsare to be carried out:

— ventilation and gas-tightness, fuel supply line and boilerwith boiler front lagging

— fuel pumps and heating arrangement— drain pipe ducts and automatic closing drain traps— inert and purging systems— manual and automatic quick closing valves and shut-down

systems— boiler hood ventilation system— boiler compartment ventilation— boiler front extinguishing system— pilot burner arrangement— gastight bulkhead penetrations— gas detection system— fuel heater.

620 The emergency towing arrangements are to be examinedand confirmed readily available with aft towing arrangementpre-rigged and forward chafing gear as stowed in such a waythat it can be rapidly connected to the strongpoint. The pick-upgear, towing pennant and chafing gear are to be examined overfull length for deterioration. Where pennant line is stored in awatertight condition and can be confirmed maintained, consid-eration may be given to waiving the requirement to examinethe pennant line over the full length. Strongpoint, fairlead andpedestal roller are to be examined together with attachment toship.

G 700 Complete periodical survey (oil pollution preven-tion)

701 The survey requirements given in 702 are applicable forconvention ships.

702 The following is to be surveyed and tested regardingpollution prevention as applicable, in addition to the require-ments for annual and intermediate survey given in 302 to 307and in 502:

— satisfactory operation of oily water separating equipmentand oil filtering equipment or process unit and oil dis-charge monitoring and control system

— segregated ballast tank arrangement (SBT)— dedicated clean ballast arrangement (CBT)— crude oil washing arrangement (COW)— the effectiveness of crude oil washing— ballast pipes through cargo tanks and cargo pipes through

ballast tanks— the oil discharge monitoring and control system— arrangement of slop tanks and piping system— audible and visible alarm on the oil discharge monitoring

and control system.


DET NORSKE VERITAS

Table G1 Minimum requirements for close-up examinations at complete periodical survey of oil tankers, ore/oil ships etc.Complete periodical




10 < Age ≤ 15


Age > 15A) One web frame ring - in a

ballast wing tank, if any, or acargo wing tank used prima-rily for water ballast

A) All web frame rings - in a bal-last wing tank, if any, or a car-go wing tank used primarilyfor water ballast

A) All web frame rings - in allballast tanks

As complete periodical surveyno. 3

B) One deck transverse - in acargo oil tank

B) One deck transverse - in eachof the remaining ballast tanks,if any

A) All web frame rings - in acargo wing tank

Additional transverses includ-ed as deemed necessary by theSociety

D) One transverse bulkhead - ina ballast tank

B) One deck transverse - in a car-go wing tank

A) One web frame ring - ineach remaining cargo wingtank

D) One transverse bulkhead - ina cargo oil wing tank

B) One deck transverse - in twocargo centre tanks

C) All transverse bulkheads - inall cargo and ballast tanks

D) One transverse bulkhead - ina cargo oil centre tank

C) Both transverse bulkheads - ina wing ballast tank, if any, ora cargo wing tank used prima-rily for water ballast

E) One deck and bottom trans-verse - in each cargo centretank

D) One transverse bulkhead - ineach remaining ballast tank

F) As considered necessary bythe surveyor

D) One transverse bulkhead - in acargo oil wing tank

D) One transverse bulkhead - intwo cargo centre tanks

A) Complete transverse web frame ring including adjacent structural members.B) Deck transverse including adjacent deck structural members.C) Transverse bulkhead complete - including girder system and adjacent members.D) Transverse bulkhead lower part - including girder system and adjacent structural members.E) Deck and bottom transverse including adjacent structural members.F) Additional complete transverse web frame ring.

Table G2 Minimum requirements for thickness measurements at complete periodical survey of oil tankers, ore/oil ships etc.Complete periodical




10 < Age ≤ 15


Age > 151.One section of deck plating for thefull beam of the ship within thecargo area (in way of a ballasttank, if any, or a cargo tank usedprimarily for water ballast)

1.Within the cargo area:

a) Each deck plate.

b) One transverse section.


a) Each deck plate.

b) Two transverse sections.

c) Selected bottom plates.


a) Each deck plate.

b) Three transverse sections.

c) Each bottom plate.2.Measurements of structural mem-bers subject to close-up examina-tion according to Table G1, forgeneral assessment and recordingof corrosion pattern

2.As for complete periodical surveyno. 1



3.Suspect areas

3.Suspect areas

3.Suspect areas

3.Suspect areas

4.Selected wind and water strakesoutside the cargo area

4.All wind and water strakes withinthe cargo area.


5.Selected wind and water strakesoutside the cargo area



DET NORSKE VERITAS

Table G3 Minimum requirements for tank testing at complete periodical survey of oil tankers, ore/oil ships etc.Complete periodical




10 < Age ≤ 15


Age > 151.All ballast tank boundaries




2.Cargo tank boundaries facing bal-last tanks, void spaces, pipe tun-nels, fuel oil tanks, pump roomsor cofferdams




3.All cargo bulkheads which formthe boundaries of segregated car-goes

3.All remaining cargo tank bulk-heads


Table G4 Requirements for extent of thickness measurement at those areas of substantial corrosion. Complete periodical survey ofoil tankers, ore/oil ships etc. within the cargo tank length

Structural member Extent of measurement Pattern of measurementBottom structure 1.

Bottom platingMinimum of 3 bays across tank, in-cluding aft bay. Measurements aroundand under all bell mouths

5 point pattern for each panel betweenlongitudinals and webs

2.Bottom longitudinals

Minimum of 3 longitudinals in eachbay where bottom plating measured

3 measurements in line across flangeand 3 measurements on vertically web

3.Bottom girders and brackets

At fore and aft transverse bulkheadbracket toes and in centre of tanks

Vertical line of single measurementson web plating with one measurementbetween each panel stiffener, or a min-imum of three measurements. Twomeasurements across face flat. 5 pointpattern on girder/bulkhead brackets

4.Bottom transverse webs

3 webs in bays where bottom platingmeasured, with measurements at bothends and middle

5 points pattern over 2 m2 area. Singlemeasurements on face flat

5.Panel stiffening

Where available Single measurements

Deck structure 1.Deck plating

Two bands across tank Minimum of three measurements perplate per band

2.Deck longitudinals

Minimum of 3 longitudinals in each oftwo bays

3 measurements in line vertically onwebs, and 2 measurements on flange (iffitted)

3.Deck girders and brackets

At fore and aft transverse bulkhead,bracket toes and in centre of tanks

Vertical line of single measurementson web plating with one measurementbetween each panel stiffener, or a min-imum of three measurements. Twomeasurements across face flat. 5 pointpattern on girder/bhd brackets

4.Deck transverse webs

Minimum of two webs with measure-ments at middle and both ends of span

5 points pattern over about 2 m2 area.Single measurements on face flat

5.Panel stiffening


Shell and longitu-dinal bulkheads

1.Deckhead and bottom strakes, andstrakes in way of stringer platforms

Plating between each pair of longitudi-nals in a minimum of 3 bays

Single measurement

2.All other strakes

Plating between every 3rd pair of lon-gitudinals in same 3 bays

Single measurement

3.Longitudinals-deckhead and bottomstrakes

Each longitudinal in same 3 bays 3 measurements across web and 1measurement on flange

4.Longitudinals - all others

Every third longitudinal in same 3 bays 3 measurements across web and 1measurement on flange

5.Longitudinals - bracket

Minimum of three at top middle andbottom of tank in same 3 bays

5 point pattern over area of bracket

6.Web frames and cross ties

3 webs with minimum of three loca-tions on each web, including in way ofcross tie connections

5 point pattern over about 2 m2 area,plus single measurements on webframe and cross tie face flats


DET NORSKE VERITAS

H. Inert Gas Plant

H 100 Application101 The requirements in H apply to ships with class notation:

INERT.

H 200 Complete periodical survey201 The requirements given in G206 and G612 apply.

I. Protected Slop Tank

I 100 Application101 The requirements in I apply to ships with class notation:

PST.

I 200 Complete periodical survey201 The requirements given in G207 and G613 apply.

J. Offshore Bow Loading Arrangements

J 100 Application

101 The requirements in J apply to ships with class notation:

BOW LOADING.

J 200 Complete periodical survey

201 Every survey of the bow loading arrangement is to beheld concurrently with the annual survey required in G200.

202 Spaces and zones used in connection with bow loadingare to be surveyed with respect to general cleanliness andmaintenance.

203 Valves and piping, including inert gas purge pipes are tobe externally surveyed. Opening up and/or pressure testingmay be required if found necessary by the surveyor. Conditionof spray-shield and collecting tray in way of connector are tobe verified in order.

204 Instrumentation, automation and communication equip-ment in bow control station is to be surveyed, tested and veri-fied in order.

205 Ventilation of gas-safe spaces is to be verified in order.

206 Electrical equipment in gas-dangerous spaces is to besurveyed.

207 Emergency disconnection systems, automatic and man-ual, are to be surveyed and tested as far as possible.

208 The bow loading area is to be surveyed with respect tofire and explosion hazards and is to include survey of:

— fire extinguishing equipment— protective measures preventing structural elements initiat-

ing sparks— ventilation of bow control station and bow loading con-

nector room— emergency escape routes from bow control station— interlock functions for the mooring and loading systems.

209 It is to be verified that the required operation manual isin order.

Transverse bulk-heads and swashbulkheads


Plating between pair of stiffeners atthree locations - approximately 1/4, 1/2and 3/4 width of tank

5 points pattern between stiffeners over1 m length

2.All other strakes

Plating between pair of stiffeners atmiddle location

Single measurement

3.Strakes in corrugated bulkheads

Plating for each change of scantling atcentre of panel and at flange or fabri-cated connection

5 point pattern over about 1 m2 of plat-ing

4.Stiffeners

Minimum of three typical stiffeners For web, 5 point pattern over span be-tween bracket connections (2 measure-ments across web at each bracketconnection, and one at centre of span).For flange, single measurements ateach bracket toe and at centre of span

5.Brackets

Minimum of three at top, middle andbottom of tank


6.Deep webs and girders

Measurements at toe of bracket and atcentre of span

For web, 5 point pattern over about 1m2. 3 measurements across face flat

7.Stringer platforms

All stringers with measurements atboth ends and middle

5 point pattern over 1 m2 of area plussingle measurements near bracket toesand on face flats

Table G4 Requirements for extent of thickness measurement at those areas of substantial corrosion. Complete periodical survey ofoil tankers, ore/oil ships etc. within the cargo tank length (Continued)

Structural member Extent of measurement Pattern of measurement

Table G5 Survey of inert gas plant

Component or system Surveymethd1)

ScrubberDeck water seaNon-return valvesScrubber cooling water arrangementBlowers including regulating valveand shut down devicesPressure/vacuum breakerFlue gas piping systemSeparate inert gas generatorRunning test, including check ofinstruments and automatic equipment

11 and 21 and 2

2

2222

21) The survey methods given are defined as follows:

Survey method No. 1: The machinery to be opened up and the partsexamined. Pressure testing may be required if found relevant and nec-essary by the surveyor.

2) Survey method No. 2: External survey and performance test to be car-ried out. Alarm- and safety functions to be tested if found necessary bythe surveyor. Opening up and/or pressure testing may be required iffound necessary by the surveyor. Last overhaul to be verified.


DET NORSKE VERITAS

K. Chemical Carriers

K 100 Application

101 The requirements in K apply to ships with class nota-tions:

Tanker for Chemicals ESP.

Tanker for C ESP.Guidance note:The additional class notation ESP will be assigned to self pro-pelled ships having integral tanks intended for carriage of liquidchemicals in bulk in accordance with IMO's International Codefor the Construction and Equipment of Ships carrying DangerousChemicals in Bulk (IBC Code), or Code for the Construction andEquipment of Ships carrying Dangerous Chemicals in Bulk(BCH Code), as applicable.


102 For tanks of stainless steel or areas in tanks where orig-inal coatings are found to be in GOOD condition as defined inSec.2 A109, the extent of close-up examination as given for theperiodical surveys, may be especially considered. The sameapplies when tanks have been re-coated (by epoxy coating orequivalent, alternatively a type approved coating, e.g. semi-hard or similar), provided that the present coating condition ofthe considered area is in GOOD condition and that documen-tation is available stating that:



103 The extent of thickness measurements as given for theperiodical surveys, may be especially considered provided thesurveyor is satisfied by the close-up examination, that there isno structural strength reduction, and the corrosion protectionsystem where applied remains effective with coatings inGOOD condition as given in 102 or for tanks of stainless steel.

K 200 Annual survey (cargo containment)

201 The requirements given in G200 and in Sec.2 B applywith the additions and amendments given in 203 to 214.


203 For areas recorded with substantial corrosion at previ-ous surveys, the requirements given in Sec.2B apply. The ex-tent of thickness measurements is to be increased inaccordance with Table K4.

204 The following components and systems as appropriateare to be surveyed during operation and tested for correct func-tioning as deemed necessary by the surveyor:

— system for cargo tank level gauging— system for cargo tank overflow control (high and high-

high level alarm)— vapour detection instruments— system for cargo temperature indication— leakage alarm in spaces containing independent cargo

tanks.

205 Fixed as well as portable mechanical ventilation systemsfor cargo handling spaces and spaces within the cargo areawhich are normally entered, are to be surveyed/tested.

206 If provided, sampling arrangements for cargo heating/cooling system are to be surveyed.

207 If provided, arrangements for storage of padding gas,monitoring of ullage spaces and provisions of drying elementson air inlets to cargo tanks are to be surveyed.

208 Decontamination showers and eye washes including anyprovisions to ensure operation under all ambient temperaturesare to be surveyed.

209 Wheelhouse doors and windows, sidescuttles and win-dows in superstructure and deckhouse bulkheads facing thecargo area are to be confirmed in good condition.

210 Pump discharge pressure gauges fitted outside the cargopump rooms are to be verified operational and distinctivemarking of pumps, valves and pipelines in pump room are tobe verified.

211 Cargo pump rooms are to be surveyed with special atten-tion to:

— remote operation of the bilge system— rescue arrangements.

212 Any special arrangements, including removable pipelengths or other approved equipment necessary for cargo seg-regation together with arrangements for bow and/or stern load-ing/unloading are to be surveyed.

213 If applicable, installations and equipment required forspecial cargoes are to be surveyed.

214 Examination of the emergency towing arrangements are,as far as practicable, to be carried out. Aft towing arrangementis to be confirmed as pre-rigged and forward chafing gear is tobe confirmed as stowed in such a way that it can be rapidlyconnected to the strongpoint. Where light is provided on pick-up gear marker buoy, proper functioning is to be confirmed.


All ballast tanks adjacent to (i.e. with a common plane bound-ary) a cargo tank with any means of heating are to be examinedinternally. When considered necessary by the surveyor, thick-ness measurements are to be carried out and if these thicknessmeasurements indicate that substantial corrosion is found, theextent of thickness measurements is to be increased in accord-ance with Table K4.

Tanks or areas where coating was found to be in GOOD con-dition as defined in Sec.2 A109 at the previous intermediate orcomplete periodical survey may be specially considered by theSociety.

K 300 Annual survey (IMO Chemical Code)

301 The survey requirements given in 302 to 303 apply toconvention ships only.

302 The following documents are to be available on board:

— required valid certificates and manuals— approved Procedure and Arrangement (P&A) manual— cargo record book— damage stability documentation— copy of code cargo data and filling limit curves— service report for dry powder or foam or CO2 installations,

as applicable.


— fire protection equipment— personal protection equipment (spot check)— cargo hoses— pollution prevention equipment.

K 400 Intermediate survey (cargo containment)

401 The requirements given in 200 and in Sec.2 C apply withthe additions and amendments given in 402 to 411.

402 For weather decks, an examination as far as applicableof cargo, bunker, ballast, steam and vent piping systems aswell as vent masts and headers is to be carried out. If upon ex-amination there is any doubt as to the condition of the piping,


DET NORSKE VERITAS

the piping may be required to be pressure tested, thicknessmeasured or both.

403 For those tanks subjected to survey, special attention isto be given to:

— cargo piping passing through ballast tanks— bilge and ballast piping passing through cargo tanks— air and sounding piping to ballast tanks passing through

cargo and ballast tanks— fuel pipes passing through ballast tanks.

404 Electrical cables and equipment installed in gas danger-ous zones and spaces are to be insulation resistance measured.The measurements may be omitted provided a record of testingis available showing that measurements have been taken dur-ing the last 12 months and that the results are satisfactory.

Insulation monitors with alarms are to be function tested, if in-stalled.

Guidance note:Megger testing of cables and equipment in cargo area may becarried out only when gas free certificate is issued for the vessel.



— an overall examination of at least two representative cargotanks is to be carried out. In addition to structure, fittingssuch as valves and instrumentation are to be subject togeneral examination

— an overall examination of all combined cargo/ballast tanksis to be carried out.

Close-up examination is to be carried out to the following ex-tent:

— ballast tanks: to the same extent as previous complete pe-riodical survey

— cargo tanks: at least two combined cargo/ballast tanks.The extent of survey is to be based on the record of the pre-vious complete periodical survey, and repair history oftank.


The requirements of the intermediate survey shall be to thesame extent as the previous complete periodical survey as re-quired in 603 to 611, 613 and 614.

However, testing of cargo and ballast tanks is not required un-less deemed necessary by the surveyor.


407 The extent of close-up examinations may be extended asstated in 606.

408 Systems for cargo heating and cooling are to be sur-veyed.

409 Provisions for drainage of cargo tank vent lines are to besurveyed.

410 Electrical bonding to the hull of piplines and independ-ent tanks, as applicable, is to be verified.

411 Spare parts for the mechanical ventilation fans in thecargo area are to be checked.

K 500 Intermediate survey (IMO Chemical Code)501 The survey requirements given in 502 apply to conven-tion ships only.

502 The following is to be surveyed in addition to require-ments given in 302 and 303:

— personnel protection equipment— cargo hoses.

K 600 Complete periodical survey (cargo containment)

601 The complete periodical survey required for cargo con-tainment system of chemical tankers is to be carried out con-currently with the renewal surveys required for hull andmachinery as given in Sec.2 D and E and in accordance withthe requirements given in 200 with the additions and amend-ments given in 602 to 626.



604 An overall examination is to be carried out on hull struc-ture and piping systems in way of all cargo and ballast tanksand in way of all pump rooms, cofferdams, pipe tunnels andvoid spaces within the cargo area.

605 The requirements for close-up examination are given inTable K1.

606 The surveyor may extend the close-up examination asdeemed necessary taking into account the maintenance of thetanks under survey, the condition of the corrosion protectionsystem and also in the following cases:

a) In particular, tanks having structural arrangements or de-tails which have suffered defects in similar tanks or onsimilar ships according to available information.

b) In tanks which have structures approved with reducedscantlings due to an approved corrosion control system.

607 The requirements for thickness measurements at com-plete periodical survey are given in Table K2.

Transverse sections are to be chosen where the largest reduc-tion are suspected to occur or are revealed from deck platingmeasurements.

In cases where two or three sections are to be measured, at leastone is to include a ballast tank within 0.5 L amidship, alterna-tively, within the cargo length area, as applicable.

608 Where substantial corrosion as defined in Sec.2 A107 isfound, the extent of thickness measurements is to be increasedin according with Table K4, or as specified in the survey pro-gramme.


610 The minimum requirements for tank testing at completeperiodical survey are given in Table K3. Pressure testing ofcargo tanks may be accepted based on confirmation from themaster, stating that the pressure testing has been carried out ac-cording to the requirements, with a satisfactory result. Gener-ally, the tanks are to be tested with a head of liquid to the topof access hatches for cargo tanks, or top of air pipes for ballasttanks, if this gives a higher pressure.

611 The surveyor may further extend the pressure testing asdeemed necessary.

612 The inert gas plant is to be surveyed as given in G613.

613 Heating coils, tank cleaning apparatus and other equip-ment in cargo tanks, cofferdams and pipe tunnels within thecargo area are to be examined. Heating coils are normally to bepressure tested. Attachments of sacrificial anodes in tanks areto be examined.

614 Cargo piping, on deck and cargo and ballast piping with-in cargo tanks, ballast tanks, including double bottom tanks,pump rooms, pipe tunnels, cofferdams and void spaces bound-ing cargo tanks, decks and outer hull are to be examined andoperationally tested to working pressure to the surveyor's sat-isfaction, to ensure that tightness and condition remain satis-factory, supplemented by thickness measurement at random, ifdeemed necessary by the surveyor. In addition to the require-


DET NORSKE VERITAS

ments given in Sec.2 D, special attention is to be given to anyballast piping in cargo tanks and any cargo piping in ballasttanks and void spaces and surveyors are to be advised on all oc-casions when this piping, including valves and fittings areopen during repair periods and can be internally examined.

615 Cargo pumps, valves etc. together with the pumps' primemovers are to be surveyed as specified in Sec.2 E100.

616 Ventilation arrangements, including fans, for cargotanks, pump rooms and other gas dangerous spaces are to besurveyed.

617 Electrical equipment in gas dangerous spaces is to besurveyed and insulation resistance checked.

618 It is to be verified that the cargo system and equipmentrequired in connection with the vessel's special features nota-tions (e.g. a1.2, b2.3, c3, f1.2, d2, k) are in order.

619 All independent cargo tanks are to be surveyed internal-ly and externally together with the tank supports and the holdspaces.

620 Thickness gauging of the independent cargo tanks is tobe carried out as found necessary by the surveyor.

621 All independent cargo tanks are to be hydraulically pres-sure tested to their MARVS (Maximum Allowable ReliefValve Setting), except that testing of cargo tanks type a3 maybe omitted if the tanks are found without corrosion and otherdamages and otherwise found acceptable by the surveyor.

622 The instrumentation of the cargo plants is to be tested.

623 The following equipment is to be surveyed or tested asappropriate:

— valves for drop lines, gas return lines and automatic shut-down of loading

— drip trays and spray shields— emergency discharge pumps.

624 It is to be verified that the marking of cargo tanks,pumps, pipelines, valves etc. is in order.

625 It is to be verified that required instructions, signboardsetc. are in order.

626 The emergency towing arrangements are to be examinedand confirmed readily available with aft towing arrangementpre-rigged and forward chafing gear as stowed in such a waythat it can be rapidly connected to the strongpoint. The pick-upgear, towing pennant and chafing gear are to be examined overfull length for deterioration. Where pennant line is stored in awatertight condition and can be confirmed maintained, consid-eration may be given to waiving the requirement to examinethe pennant line over the full length. Strongpoint, fairlead andpedestal roller are to be examined together with attachment toship.

K 700 Complete periodical survey (IMO ChemicalCode)701 The survey requirements given in 702 apply to conven-tion ships only.

702 The following is to be surveyed and tested in addition torequirements given in 502:

— stripping tests of two cargo tanks.

Table K1 Minimum requirements for close-up examination at complete periodical survey of chemical tankersComplete periodical




10 < Age ≤ 15


Age > 151.One transverse section - in a bal-last wing tank or double hull tank

1.All plating and internal structure -in a ballast wing tank or doublehull tank

1.All plating and internal structure -in all ballast tanks

1.As complete periodical survey no.3

2.One deck transverse - in a cargotank or on deck

2.One deck transverse - in each re-maining ballast tank or on deck.

2.All plating and internal structure -in a cargo wing tank

3.Lower part of one transversebulkhead - in a ballast tank

3.One deck transverse - in a cargowing tank or on deck

3.One transverse section in each re-maining cargo tank

4.Lower part of one transversebulkhead - in a cargo wing tank

4.One deck transverse - in two car-go centre tanks or on deck

4.All transverse bulkheads - in allcargo tanks

5.Lower part of one transversebulkhead - in a cargo centre tank.

5.Lower part of one transversebulkhead - in each remaining bal-last tank6.Lower part of one transversebulkhead - in a cargo wing tank7.Lower part of one transversebulkhead - in two cargo centretanks

NOTES:

— Close-up examination of a transverse section cover longitudinal, vertical and transverse structure.— Double hull tank includes double bottom and side tank even though these tanks are separated.


DET NORSKE VERITAS

Table K2 Minimum requirements for thickness measurements at complete periodical survey of chemical tankersComplete periodical




10 < Age ≤ 15


Age > 151.One section of deck plating for thefull beam of the ship within thecargo length area (in way of a bal-last tank, if any, or a cargo tankused primarily for water ballast)


a) Each deck plate.

b) One transverse section.


a) Each deck plate.

b) Two transverse section.


a) Each deck plate.

b) Three transverse section.

c) Each bottom plates.2.Measurements of structural mem-bers subject to close-up examina-tion according to Table K1, forgeneral assessment and recordingof corrosion pattern




3.Suspect areas

3.Suspect areas

3.Suspect areas

3.Suspect areas

4.Selected wind and water strakesoutside the cargo length area



5.All wind and water strakes withinthe cargo length area


Table K3 Minimum requirements for tank testing at complete periodical survey of chemical tankersComplete periodical




10 < Age ≤ 15


Age > 151.All ballast tank boundaries




2.Cargo tank boundaries facing bal-last tanks, void spaces, pie tun-nels, fuel oil tanks, pump roomsor cofferdams




3.All cargo bulkheads which formthe boundaries of segregated car-goes

3.All remaining cargo tank bulk-heads



DET NORSKE VERITAS

L. Liquefied Gas Carriers

L 100 Application

101 The requirements in L apply to ships with the class no-tation:

Tanker for Liquefied Gas.

L 200 Annual survey (cargo systems)

201 The surveys given in 202 to 221 are to be carried outconcurrently with the annual survey required in Sec.2 B.

202 The annual survey intends to ensure that the cargo han-dling installations and related safety equipment are in satisfac-tory condition. The annual survey is preferably to be carriedout during a loading or discharging operation. Access to cargotanks or inerted hold spaces, necessitating gas-freeing/aeratingwill normally not be required.

203 The log books are to be examined with regard to the con-dition of the cargo containment and the correct functioning ofthe cargo handling systems. The running hours per day of thereliquefaction plants or the boil-off rate and the inert gas con-sumption are to be considered in order to check that no irregu-larities in performance have occured.

204 Spaces used in connection with cargo handling (e.g. car-go control room, air locks, compressor rooms, electrical motorrooms), are to be surveyed with respect to general condition,e.g. cleanliness and maintenance.

205 Gastight bulkheads with possible shaft sealings are to bevisually examined.

206 The cargo handling piping and machinery, includingcargo process piping, cargo heat exchangers, vapourisers,pumps, compressors are to be visually examined, as far as pos-sible, during operation. Insulation on piping is to be visuallyexamined.

Table K4 Requirements for extent of thickness measurements at those areas of substantial corrosion. Complete periodical survey ofchemical tankers

Structural member Extent of measurement Pattern of measurementDouble bottomand hopper struc-ture

1.Inner bottom plating and bottom plat-ing

Suspect plate plus all adjacent plates.Measurements around and under allbell mouths and pump wells

5 point pattern for each panel betweenlongitudinals over 1 m length

2.Inner bottom and bottom longitudinals

Three longitudinals where plates meas-ured

3 measurements in line across flangeand 3 measurements on vertically web

3.Longitudinal girders or transversefloors

Suspect plates 5 point pattern over about 1 m2

a) 5 point pattern over about 1 m2

b) 5 point pattern alternate platesover 1 m2 of plating

4.Watertight bulkheads (WT floors)

a) Lower 1/3 of tank.

b) Upper 2/3 of tank.

5 point pattern

5.Web frames

Suspect plate

Deck structure 1) 1.Deck plating

Two bands across tank Minimum of three measurements perplate per band

2.Deck longitudinals

Minimum of 3 longitudinals in each oftwo bays

3 measurements in line vertically onwebs, and 2 measurements on flange (iffitted)

3.Deck girders and brackets

At fore and aft transverse bulkhead,bracket toes and in centre of tanks

Vertical line of single measurementson web plating with one measurementbetween each panel stiffener, or a min-imum of three measurements. Twomeasurements across face flat. 5 pointpattern on girder/bulkhead brackets

4.Deck transverse webs

Minimum of two webs with measure-ments at middle and both ends of span

5 point pattern over about 2 m2 areas.Single measurements of face flat

5.Panel stiffening


Shell and longitu-dinal bulkheads


Plating between each pair of longitudi-nals in a minimum of 3 bays.

Single measurements

2.All other strakes

Plating between every 3rd pair of lon-gitudinals in same 3 bays

Single measurements

3.Longitudinals - deckhead and bottomstrakes

Each longitudinal in same 3 bays 3 measurements across web and 1measurement on flange

4.Longitudinals - all others

Every third longitudinal in same 3 bays 3 measurements across web and 1measurement on flange

5.Longitudinals - brackets

Minimum of three at top middle andbottom of tank in same 3 bays


6.Web frames and cross ties

3 webs with minimum of three loca-tions on each web, including in way ofcross tie connections

5 point pattern over about 2 m2 area,plus single measurements on webframe and cross tie face flats

1) For tanks where Substantial Corrosion covers more than 20% of the deck surface, the whole deck structure including longitudinals and web frames abovethis tank, should be mapped as if they were areas with substantial corrosion.


DET NORSKE VERITAS

207 Venting systems for the cargo tanks, interbarrier spacesand hold spaces are to be visually examined externally. It is tobe verified that the cargo tank relief valves are sealed and thatthe certificate for the relief valves' opening and closing pres-sures is onboard.

208 The instrumentation of the cargo installations:

— automatic control, alarm and safety systems related to thepressure in cargo tanks, interbarrier spaces and hold spac-es

— systems for cargo tank level gauging, including high levelalarm and high level shut-off

— systems for temperature indication of the cargo, the cargocontainment system, the hull and the cargo piping system

— systems for leakage detection of interbarrier spaces andhold spaces

— automatic control, alarm and safety systems in connectionwith cargo compressors and cargo pumps

is to be verified in good working order by one or more of thefollowing methods:

— visual external examination— comparing of read-outs from different indicators— consideration of read-outs with regard to the actual cargo

and/or actual conditions— examination of maintenance records with reference to the

cargo plant instrumentation maintenance manual.

209 Emergency shut-down valves at shore connections andtanks are to be tested without flow in the pipe lines. It is to beverified that operation of the emergency shut-down systemwill cause the cargo pumps and compressors to stop.

210 The gas detection equipment is to be tested for correctfunctioning, including indicators and alarms.

211 Ventilation systems for all spaces in the cargo area, in-cluding air-locks, cargo pump rooms, cargo compressorrooms, electrical motor rooms, cargo control rooms, and otherspaces used for cargo handling operations are to be verified asbeing in satisfactory operating condition.

212 In gas dangerous spaces and zones, electrical cables, ca-ble supports and electrical equipment are to be visually exam-ined as far as possible.

213 Inert gas and dry air installations including the means forprevention of backflow of cargo vapour to gas-safe spaces areto be verified as being in satisfactory operating condition.

214 The means for ensuring the gas and vapour tightness ofthe wheelhouse windows and doors, sidescuttles and windowsin way of ends of superstructures and deckhouse facing the car-go area or stern loading and unloading arrangements and clos-ing devices of all air intakes and openings intoaccommodation, service and control spaces are to be exam-ined.

215 The sealing arrangements for tanks or tank domes pene-trating decks or tank covers are to be examined.

216 Portable and/or fixed drip trays or insulation for deckprotection in the event of cargo leakage are to be examined.

217 Correct functioning of any arrangements for heating ofstructural hull steel is to be verified. Access to the heated cof-ferdams etc. is normally not required.

218 It is to be verified that the cargo piping systems are elec-trically bonded to the hull.

219 Arrangements for burning methane boil-off are to bevisually examined as far as practicable. The instrumentationand safety systems are to be verified as being in good workingorder in accordance with 208.

220 The relevant instruction and information material suchas cargo handling plans, cargo instrumentation maintenance

manual, filling limit information, cooling down proceduresetc. are to be verified as being onboard.

221 Examination of the emergency towing arrangements are,as far as practicable, to be carried out. Aft towing arrangementis to be confirmed as pre-rigged and forward chafing gear is tobe confirmed as as stowed in such a way that it can be rapidlyconnected to the strongpoint. Where light is provided on pick-up gear marker buoy, proper functioning is to be confirmed.

L 300 Annual survey (IMO Gas Code)

301 The survey requirements given in 302 to 303 are onlyapplicable for convention ships. The survey is to be carried outconcurrently with the survey required in 200.

302 The following documents are to be available on board:

— required certificates— damage stability documentation if applicable (required if

ship identified as a Type 1G, 2G, 2PG or 3G in the GasCode Certificate of Fitness)

— copy of code cargo data— service report for dry powder or foam or CO2 installations,

as applicable.


— fire protection equipment including water spray system— personal protection equipment— cargo hoses— decontamination showers and eyewashes.

L 400 Intermediate survey (cargo systems)401 The requirements given in 200 and in Sec.2 C apply withthe additions and amendments given in 402 to 410.

402 The intermediate survey supplements the annual surveyby testing cargo handling installations with related automaticcontrol, alarm and safety systems for correct functioning. Theintermediate survey is preferably to be carried out with the shipin a gas-free condition. The extent of the testing required forthe intermediate survey will normally be such that the surveycannot be carried out during a loading or discharging opera-tion.

403 Protection screens and flame screens, if provided, in thecargo containment venting systems are to be verified in satis-factory condition. Means for draining the vent system are to beexamined.

404 The instrumentation of the cargo installation referred toin 208 is to be visually examined and to be tested by changingthe parameter as applicable and comparing with test instru-ments. Simulated testing may be accepted for sensors whichare not accessible or for sensors located within cargo tanks orinerted hold spaces. The testing is to include testing of alarmand safety functions.

405 For ships having a gas fuel forwarding system, the safetyand control equipment and alarm and shut down functions re-lated to the following systems are to be tested:

— gas heating arrangement— fuel gas compressor and forwarding system— ventilation arrangement— protection and flame screens— gas freeing and purging systems— manual and automatic shut-down system— gas detection system— pilot flame burner or «fuel floor» arrangement, if applica-

ble— governor stability switching from gas fuel to oil, or vice

versa.

406 The piping of the gas detection system is to be visuallyinspected for corrosion and damage as far as practicable. The


DET NORSKE VERITAS

integrity of the suction lines between suction points and ana-lysing units is to be verified as far as possible.

407 The ventilation systems for spaces in the cargo area areto be surveyed and function tested.

408 Electrical equipment in gas-dangerous spaces and zonesis to be examined as far as practicable with particular respectto the following:

— earthing (spot check)— integrity of certified safe equipment— function testing of pressurised equipment and of associat-

ed alarms— testing of insulation resistance of circuits. Such measure-

ments are only to be made when the ship is in the gas-freeor inerted condition and are to be carried out within an ac-ceptable time period. Where proper records of testing aremaintained consideration may be given to accepting recentreadings (maximum 12 months) by the ship's crew

— insulation monitors with alarms are to be function tested,if installed.

409 For rooms protected by air locks, interlocking with ven-tilation of electrical supply to non-explosion protected equip-ment and de-energising of such equipment in case ofventilation failure are to be examined and function tested as ap-plicable.

410 Confirmation that spares are provided for cargo area me-chanical ventilation fans (not required if double fans provid-ed).

L 500 Intermediate survey (IMO Gas Code)

501 The survey requirements given in 502 apply to conven-tion ships only.

502 The survey requirements of 302 to 303 apply.

L 600 Complete periodical survey (cargo systems)

601 The complete periodical survey required for cargo sys-tems of liquefied gas tankers is to be carried out concurrentlywith renewal surveys required for hull and machinery as givenin Sec.2 D and E and in accordance with the requirements giv-en in 202 to 221 and in 402 to 410 with the additions andamendments as given in 602 to 625.

602 All cargo tanks are to be cleaned and examined internal-ly.

603 As far as practicable the outer surface of uninsulated car-go tanks or the outer surface of cargo tank insulation togetherwith any vapour or protective barrier is to be examined. Spe-cial attention is to be given to the cargo tank and insulation inway of chocks, supports and keys. Partial removal of insulationmay be required in order to verify the condition of the tank orthe insulation itself if found necessary by the surveyor.

Where the insulation arrangement is such that it cannot be ex-amined, the surrounding structures of wing tanks, double bot-tom tanks and cofferdams are to be examined for cold spotswhen the cargo tanks are in the cold condition (prior to thecomplete periodical survey) unless voyage records togetherwith the instrumentation give sufficient evidence of the integ-rity of the insulation system.

604 Thickness measurements of the cargo tanks may be re-quired if deemed necessary by the surveyor.

605 For integral tanks and independent tanks type A and C,non-destructive testing is to supplement cargo tank inspection,with special attention to be given to the integrity of the mainstructural members, tank shell and highly stressed parts, in-cluding welded connections as deemed necessary by the sur-

veyor. The following items are, inter alia, considered to havehighly stressed areas:

— cargo tank supports and anti-rolling/anti-pitching devices— stiffening rings or web frames— Y-connections between tank shell and a longitudinal bulk-

head of bilobe tanks— swash bulkhead boundaries— dome and sump connections to the tank shell— foundations for pumps, towers, ladders etc.— pipe connections.

606 For independent tanks type B, the extent of non-destruc-tive testing is to be as given in a programme specially preparedfor the cargo tank design.

607 The tightness of all cargo tanks is to be verified by an ap-propriate procedure. Provided that the effectiveness of theship's gas detection equipment has been confirmed, it will beacceptable to utilise this equipment for the tightness test of in-dependent tanks below deck during the first loading of the car-go tanks subsequent to the complete periodical survey.

608 Where findings of 602 to 607 or an examination of thevoyage records raise doubts as to the structural integrity of acargo tank, a hydraulic or hydropneumatic test is to be carriedout. For integral tanks and for independent tanks type A and B,the test pressure at top of the tank is not to be less than theMARVS (Maximum Allowable Relief Valve Setting). For car-go tanks type B with MARVS higher than 1.0 bar, a test pres-sure higher than MARVS will be specially considered. Forindependent tanks type C the test pressure is not to be less than1.25 times the MARVS.

609 At the second, the fourth, and thereafter at each com-plete periodical survey all independent cargo tanks type C areto be either:

— hydraulically or hydropneumatically tested to 1.25 timesMARVS and thereafter non-destructively tested in accord-ance with 605, or

— subjected to a thorough, planned non-destructive testing.

This testing is to be carried out in accordance with a pro-gramme specially prepared for the tank design. If a special pro-gramme does not exist, special attention is to be given to thedetection of surface cracks in welded connections in highlystressed areas as listed in 605.

At least 10% of the length of the welded connections in eachof above mentioned areas is to be tested. This testing is to becarried out internally and externally as applicable.

Insulation is to be removed as necessary for the required non-destructive testing.

610 Secondary barriers are to be examined visually for theireffectiveness. For containment systems where access is notpossible, the effectiveness of the secondary barrier may bechecked by means of pressure/vacuum tests or other relevantmethods.

611 For membrane and semi-membrane tank systems in-spection and testing are to be carried out in accordance withprogrammes specially prepared in accordance with an ap-proved method for the actual tank system.

612 If installed, systems for heating of hull structures are tobe surveyed and function tested.

613 All pressure relief valves for the cargo tanks are to beopened for examination, adjusted, function tested and sealed.

The allowable tolerance on the set pressure is given in TableL1.


DET NORSKE VERITAS

If the cargo tanks are equipped with relief valves with non-me-tallic membranes in the main or pilot valves, such non-metallicmembranes are to be replaced with new ones.

614 Pressure/vacuum relief valves, pressure relief hatchesand rupture discs on interbarrier spaces and hold spaces are tobe examined, if necessary by opening, adjusted and tested de-pending on their design.

615 The cargo, liquid nitrogen and process piping systems,including valves, actuators, compensators etc. are to be openedfor examination as deemed necessary. Insulation is to be re-moved as deemed necessary to ascertain the condition of thepipes. If the visual examination raises doubt as to the integrityof the pipelines, a pressure test at 1.25 times the MARVS forthe pipeline is to be carried out. After reassembly the completepiping system is to be tightness-tested to MARVS.

If the maximum delivery pressure for the piping system is lessthan the design pressure for the piping system, testing to thepumps' delivery pressure may be accepted. In such cases ex-pansion bellows, selected at random, may be required disman-tled for internal survey and pressure tested to their designpressure.

616 The pressure relief valves in the cargo and process pip-ing systems are to be opened, function tested and adjusted tothe extent found necessary by the surveyor.

617 The watersides of seawater-cooled heat exchangers, in-cluding those for gas operation of propulsion machinery are tobe opened for survey, and the heat exchangers are to be pres-sure tested as found necessary.

618 Cargo pumps, compressors and other machinery, includ-ing prime movers, used in connection with cargo handling andgas operation of propulsion machinery are to be surveyed.

619 The following portable equipment is to be surveyed:

— portable gas detectors, oxygen and humidity analysers— hoses and spool pieces used for segregation of piping sys-

tems for cargo, ventilation, inert gas and bilging.

620 Water spray systems are to be surveyed and tested forcorrect functioning.

621 Systems for removal of water or cargo from interbarrierspaces and hold spaces are to be examined and tested asdeemed necessary.

622 All gas-tight bulkheads are to be inspected. The effec-tiveness of gas-tight shaft sealings is to be verified.

623 It is to be verified that the cargo tanks are electricallybonded to the hull.

624 It is to be verified that required instructions, informationand signboards are in order.

625 The emergency towing arrangements are to be examinedand confirmed readily available with aft towing arrangementpre- rigged and forward chafing gear as stowed in such a waythat it can be rapidly connected to the strongpoint. The pick-upgear, towing pennant and chafing gear are to be examined overfull length for deterioration. Where pennant line is stored in awatertight condition and can be confirmed maintained, consid-eration may be given to waiving the requirement to examinethe pennant line over the full length. Strongpoint, fairlead andpedestal roller are to be examined together with attachment toship.

L 700 Complete periodical survey (IMO Gas Code)

701 The survey requirements given in 702 apply to conven-tion ships only.

702 The survey requirements given in 302 to 303 apply.

M. Fire Fighters

M 100 Application

101 The requirements in M apply to ships with class nota-tions:

Fire Fighter IFire Fighter IIFire Fighter III.

M 200 Class notation Fire Fighter I201 Water spray plant for self protection, including pumps,pipes and nozzles, is to be surveyed and tested.

202 Pumps for water monitors including their prime moversare to be surveyed and tested at maximum capacity. Remotecontrol of monitors including valve operation is to be tested.

203 Hoses with their equipment are to be surveyed and test-ed.

204 Fireman's outfit and compressors for charging the airbottles are to be surveyed.

205 Floodlights are to be tested.

206 It is to be verified that the required operation manual isin order.

M 300 Class notation Fire Fighter II301 In addition to the requirements in 202 to 206, the mobilegenerator for foam production with its equipment is to be sur-veyed.

M 400 Class notation Fire Fighter III401 In addition to the requirements given in 300, the fixedfoam monitors with foam production equipment and remotecontrol are to be surveyed.

N. Well Stimulation Vessels

N 100 Application101 The requirements in N apply to ships with class notation:

Well Stimulation Vessel.

N 200 Annual survey

201 Spaces and zones used in connection with the well stim-ulation system are to be surveyed with respect to general clean-liness and maintenance.

202 Tanks, pumping and piping and associated equipmentare to be subjected to an external visual inspection. Conditionof protective shielding, insulation and sealing of pressurevalves is to be verified.

203 The flexible high pressure hose including end connec-tors is to be hydraulically pressure tested to 1.25 times its max-imum working pressure.

204 The following components and systems are to be sur-veyed and tested:

— emergency remote stop of pumps and shut-off of liquid ni-trogen supply valves

Table L1 Cargo tanks - tolerance on set pressureSet pressure p

(bar)Tolerance

(%)0.0 ≤ p ≤ 1.5 ±10.01.5 < p < 3.0 ±6.0

3.0 ≤ p ±3.0


DET NORSKE VERITAS

— tank level gauges— tank level alarms and liquid leakage alarms— hydrogen and oxygen detection and alarm system— ventilation system.

205 Decontamination showers and eye washes are to be sur-veyed and tested. Personnel protective equipment is to be ex-amined.

N 300 Complete periodical survey

301 The requirements in 200 apply with the additions givenin 302 to 311.

302 Liquid nitrogen tanks are to be inspected internally. Onhighly stressed parts, non-destructive testing may be requiredif considered necessary by the surveyor. The tanks are to be hy-drostatically, hydropneumatically or otherwise pressure testedto their MARVS (Maximum Allowable Relief Valve Setting).

303 Acid tanks are to be examined internally.

304 All pressure relief valves are to be opened for survey,adjusted, sealed and function tested.

305 Pressure/vacuum relief valves for the acid tanks are to besurveyed and tested for proper function.

306 Spot checking by NDT of the high pressure piping is tobe carried out.

307 The nitrogen vapouriser is to be opened for internal in-spection and hydraulically tested to 1.25 times its maximumworking pressure after reassembly.

308 The high pressure piping is to be hydraulically tested to1,25 times its maximum working pressure.

309 Opening for internal inspection of pumps and valvesmay be required as found necessary by the surveyor.

310 Certified safe electrical equipment is to be examined andinsulation resistance measured.

311 The emergency depressurisation and disconnecting ofthe transfer hose is to be tested.

O. Arrangements for Carriage of Low Flash-point Liquids

O 100 Application

101 The requirements in O apply to ships with class nota-tions:

LFLLFL*.

O 200 Annual survey

201 The surveys required in 202 and 203 are to be carried outconcurrently with the annual survey required in Sec.2 B.

202 The survey is to include a general examination of:

— tanks— pumping and piping systems (cargo, heating, bilge)— ventilation system— bulkheads with respect to tightness— electrical equipment in gas dangerous zones— inert gas arrangement, if installed.

203 The following components and systems are to be sur-veyed and tested for correct functioning:

— pressure/vacuum relief valves— emergency stop of pumps— quick release of transfer hose— tank high level alarms

— portable hydrocarbon gas-measuring apparatus— portable oxygen-measuring apparatus, if applicable— gas detection system in cofferdams if applicable.

204 Insulation resistance of electrical cables is to be meas-ured. The measurements may be omitted provided a record oftesting is available showing that measurements have been tak-en during the last 12 months and that the results are satisfacto-ry.

O 300 Complete periodical survey

301 The requirements given in 200 apply with the additionsgiven in 302 to 306.

302 All cargo tanks are to be internally examined. The tanksare to be hydrostatically, hydropneumatically or otherwisepressure tested to their MARVS (Maximum Allowable ReliefValve Setting).

303 If fitted heating coils, anodes, tank cleaning apparatusand other equipment in cargo tanks and cofferdams are to besurveyed. Heating coils are normally to be pressure tested.

304 Cargo pumps, pipes, valves, inert gas arrangement, etc.together with the pump's prime movers are to be surveyed asspecified in Sec.2 E100.

305 Electrical equipment in gas-dangerous zones is to besurveyed and insulation resistance checked.

306 It is to be verified that required instruction manuals andsignboards are in order.

P. Reception System for Recovered Oil

P 100 Application

101 The requirements in P apply to ships with class notation:

OILREC.

P 200 Complete periodical survey

201 The survey is normally to include examination of thefollowing components and arrangements:

— tanks intended for storage of recovered oil if the tanks arenot separated from the engine room by cofferdams

— inert gas arrangement, if installed. For extent of survey,see F

— piping system for oil recovery operations. If recovered oilis led into tanks through hatch openings, the existence ofspecial hatch covers to prevent gas outflow through theopenings is to be verified

— blanking-off arrangements for pipe systems not in use dur-ing oil recovery operations

— disconnecting arrangements of non-certified electricalequipment in spaces adjacent to tanks for recovered oiland on open deck

— dry powder fire extinguishers including hoses— portable hydrocarbon gas-measuring instrument— electrical equipment certified for use in gas dangerous ar-

eas— instruction book for oil recovery operations and sign-

boards.

Q. Pusher and Pusher/Barge Combinations

Q 100 Application

101 The requirements in Q apply to ships with class notation:

Pusher and Pusher/Barge Unit.


DET NORSKE VERITAS

Q 200 Complete periodical survey

201 Every survey of the pushing arrangement and the con-nection system is to be held concurrently with the renewal sur-vey of the hull.


— connecting points and contact areas with supporting struc-ture

— connecting equipment including locking device if any.

R. Oil Production Vessels

R 100 Application

101 The requirements in R apply to ships with class nota-tion(s):

Oil Production VesselOil Production and Storage Vessel.

R 200 Survey arrangement

201 Annual and complete periodical surveys may be carriedout on location based on an approved planned maintenancesystem without interrupting the function of the ship.

R 300 Annual survey

301 Structure supporting equipment and heavy modules ap-plied in the oil production operation to be surveyed.

302 A general examination of:

— cargo tank openings and pressure/vacuum valves— crude oil piping systems— cargo pump rooms— escape routes— fire extinction systems in crude oil tank and pump room

area

is to be carried out.

303 The following components and systems are to be sur-veyed and tested for correct functioning as found necessary bythe surveyor:

— gas detection systems, flammable and toxic gases— fire detection system— system for crude oil tank level measurements— general alarm system and communication between control

stations.

304 In hazardous areas the following equipment and systemsare to be surveyed and tested:

— ventilation system including overpressure alarms— alarms and shutdown for pressurised equipment and

rooms— electrical equipment and cables— self-closing gastight doors, air locks, openings and access-

es— protection devices for combustion equipment and engines.

305 The emergency shutdown system for:

— ventilation— wellhead valves and oil production facilities— all non-essential electrical equipment— all essential electrical equipment

is to be surveyed and function tested. Special attention is to begiven to both manual and automatic activation, power supplyand alarms.

306 Where cross connections between piping system for oilproduction and safe piping system exist, the means for avoid-ing possible contamination of the safe system with the hazard-ous medium are to be surveyed.

R 400 Complete periodical survey

401 The requirements given in 300 apply with the additionalamendments given in 402 to 409.

402 For ships having boilers burning crude oil or slop, sur-vey and testing of control equipment including monitoring sys-tems and shut-down functions related to the following systemsare to be carried out:

— ventilation and gas-tightness, fuel supply line and boilerwith boiler front lagging

— fuel pumps and heating arrangement— drain pipe ducts and automatic closing drain traps— inert and purging systems— manual and automatic quick closing valves and shut-down

systems— boiler hood ventilation system— boiler compartment ventilation— boiler front extinguishing system— pilot burner arrangement— gastight bulkhead penetrations— gas detection system— fuel heater.

403 For ships having turbines, engines or boilers burninggas, survey and testing of the safety and control equipment andalarm and shut-down functions related to the following sys-tems are to be carried out:

— gas heating arrangement— ventilation arrangement— protection and flame screens— gas freeing and purging systems— manual and automatic shut-down system— gas detection system— pilot flame burner or «fuel floor» arrangement— governor stability switching from gas fuel to oil, or vice

versa.

404 Function test of instrumentation and safety devices forcomponent and systems given in 303 is to be carried out.

405 The fire extinguishing systems in/at:

— crude oil tank area— crude oil pump room— engine and boiler room— helicopter deck

are to be surveyed and tested for correct functioning.

406 It is to be verified that the required signboards are in or-der.

407 The drainage system of the hazardous areas is to be sur-veyed.

408 The insulation resistance of the electrical installation inthe hazardous area is to be checked.

409 The fireman's outfit is to be surveyed.

S. Ships and Plants for Refrigerated Cargoesand Controlled Atmosphere

S 100 Application

101 The requirements in S apply to ships with class nota-tions:


DET NORSKE VERITAS

ReeferRMRM ContainerKMCCACA (port.).

S 200 Annual survey201 The surveys required in 202 to 217 are to be carried outconcurrently with the annual survey required in Sec.2 B.

The surveyor may require opening up of machinery and dis-mantling of insulation to the extent he finds necessary.

202 The refrigerating plant, with machinery and equipment,is to be surveyed in running condition, preferably without car-go onboard. Temperature- and capacity control systems aswell as alarm and shut-down systems are to be checked.

203 A tightness test is to be carried out of refrigerant systemswith odourless refrigerants. Systems with a refrigerant withdistinct odour and brine systems are to be inspected for tight-ness.

204 The freezing point (density) and acidity (pH value) ofthe brine are to be checked.

205 General safety measures are to be checked including:

— protection of fans and other rotating machinery— alarm and emergency stop buttons— doors, hatches, etc. with regard to escape possibilities and

prevention of personnel being trapped within chambers,air cooler rooms etc.

— emergency escapes— refrigerant leakage detectors.

206 The internal lining of the chambers is to be surveyed. Itis to be checked that the chambers are free from odour.

207 Ducts, walls, gratings, battens, etc. which are installedfor the purpose of air circulation within the chambers are to besurveyed.

208 Hatches and doors with closing appliances are to be sur-veyed.

209 Scuppers, bilges with rose boxes, suction-, sounding-and drain-pipes together with drip pans are to be surveyed toascertain that they are in good working order.

210 Thermometers and other equipment for measuring tem-perature in holds, chambers, air ducts, RSW tanks, freezingtunnels and plate freezers are to be surveyed and their accuracychecked to the extent found necessary by the surveyor.

211 CO2 detectors, if required installed, are to be checked.

212 The electrical installations including electrical equip-ment such as motors, switchgear and cables are to be examinedand the insulation resistance is to be checked to the extentfound necessary by the surveyor.

213 The safety precautions required for group 2 refrigerants,gas tight machinery room bulkheads, separate ventilation sys-tem, catastrophe ventilation or sprinkler arrangement, escapearrangements for process areas and continuously manned car-go chambers, etc. are to be examined.

214 Items 215 to 217 apply to ships with class notations:

CA or CA (port.).215 The complete CA installation is to be subject to visualinspection and testing including at least the following:

— check that P/V-valves are operational— inspection of cleats, hinges, catches and locks for hatches

and doors— inspection of seals and gaskets on hatches and doors

— spot check of interlocks on inlet valve arrangement— inspection of required ventilation fans during operation— inspection of portable ventilators— spot check of N2 release prealarm— spot check of water seals— inspection of the N2 generating unit during operation— if arranged, inspection of the CO2 scrubber(s) during op-

eration— inspection and spot check of gas analysing and monitoring

equipment, including fixed equipment, portable equip-ment for chamber/space monitoring and portable equip-ment for personal protection. Calibration records andprocedures are to be checked. Use and availability of cer-tified test gases are to be confirmed

— verification of satisfactory maintenance and function test-ing procedures for instrumentation. Spot check of moni-toring, alarm and safety functions

— all signboards on the entrances to rooms adjacent to CAchambers are to be checked. The signboards are to be inaccordance with the approved instruction manual

— locks on doors and hatches to be checked. For number andlocation of locks, see approved instruction manual.

216 All CA chambers or gastight groups of chambers are tobe individually tightness tested with air to the design overpres-sure. The pressure drop during 15 minutes shall not exceed30% of the design overpressure. Testing by the vessel's mastercarried out maximum one month prior to the survey may be ac-cepted based on written report by the master and provided thevisual inspection does not cause doubts about the tightness.

217 It is to be verified that the approved instruction manualis onboard, is complete and that the responsible officers are fa-miliar with its content.

S 300 Complete periodical survey301 The surveys given in 302 to 319 are to be carried outconcurrently with the renewal surveys required in Sec.2 D andE.

The surveyor may require further opening up of machinery,dismantling of insulation and testing to the extent he finds nec-essary.

302 The refrigerating plant with machinery and equipment isto be tested while cooling down from ambient temperature tothe lowest design temperature for the chambers. The ability tomaintain stable delivery air temperature at all design chambertemperatures is to be demonstrated. Satisfactory operationduring defrosting is to be demonstrated.

303 The insulation is to be surveyed for cold spots when thechambers are at the lowest design temperature.

304 The requirements given in 203 to 213 apply with the ad-ditions given in 305 to 319.

305 Sufficient areas of insulation are to be stripped from theholds, air trunkways, pressure vessels, piping and other insu-lated parts in order to assess the condition of the insulated steeland the insulation itself.

306 At the second and all subsequent renewal surveys pres-sure vessels with R717 are to be surveyed internally with re-gard to possible ammonia stress corrosion cracking.

307 Reciprocating compressors may be required opened upfor survey, if found necessary by the surveyor. Screw- and tur-bo-type compressors may be examined without opening up,provided they are test-run to the surveyor's satisfaction.

308 Air coolers, freezing tunnels and plate freezers are to beexamined.

309 Condenser cooling water pumps, brine pumps and RSWpumps are to be opened up and surveyed.

310 Brine and RSW piping systems are to be surveyed atworking pressure.


DET NORSKE VERITAS

311 Water side of water cooled condensers and brine side ofbrine coolers are to be opened up for survey of tubes, tube-plates and end covers.

312 Pressure gauges, thermometers and automatic controlsand alarms are to be tested.

313 Pressure relief valves and safety discs are to be exam-ined externally and on the outlet side after dismantling of out-let piping and possible external bodies. The tightness over theseat is to be verified. Testing or opening up is required onlywhen specially deemed necessary by the surveyor. Dischargepiping is to be examined with regard to integrity and non-ob-structed flow.

314 The electrical installations including electrical equip-ment such as motors, switchgear and cables are to be examinedand the insulation resistance is to be checked.

315 Items 316 to 319 apply to ships with class notations:

CA or CA (port.).316 The complete CA installation is to be subject to com-plete survey and testing. Air compressors, pressure vesselsand other machinery components are to be surveyed in accord-ance with the principles of Sec.2 E.

317 All CA chambers or gastight groups of chambers are tobe individually tightness tested with air in the presence of thesurveyor to the design overpressure. The pressure drop during15 minutes shall not exceed 30% of the design overpressure.

318 All entrances to CA chambers, through running pipes,hatches and other connections from CA chamber to adjacentspaces, are to be visually inspected with respect to corrosion,damaged gaskets and other items which may affect the tight-ness between CA chambers and adjacent spaces.

319 Gas separating and adsorbtion units are to be tested withregard to capacity and quality of the produced gas.

S 400 Survey in loading port, upon request

401 The Society may upon request carry out surveys of re-frigerated cargo installations in the loading port for such cargo.Such surveys are not mandatory for retention of class.

The chambers are to be examined in an empty state to ascertainthat they are clean and free from odour, that the dunnage ribsare in good order, and that no damage has been sustained to theaid ducts, facing or insulation.

The surveyor is to ascertain that all pipes for the drainage of thechambers and the drip pans are in good working order. Thetemperatures in the chambers are to be recorded, and the con-dition of the remote thermometers is to be checked. It is to beascertained that the plant is free from leakage.

T. Dangerous Goods

T 100 Application

101 The requirements in T apply to ships with class nota-tions:

DG—P and DG—B.

T 200 Complete periodical survey, compulsory require-ments201 These survey requirements are applicable to all types ofcargo spaces and classes of dangerous goods.

202 It is to be verified that the required documents (see Ch.4Sec.2 B206) are kept available onboard.


— electrical installation in cargo spaces— ventilation system for cargo spaces

— separate bilge pumping system or drainage for cargo spac-es

— personnel protective clothing and breathing apparatus— portable fire extinguishers for cargo spaces— insulation of machinery space boundaries— water spray system on open Ro-Ro cargo spaces.

U. Ro-Ro Ships

U 100 Application101 The requirements in U apply to ships with the class no-tation:

Ro/Ro.

U 200 Annual survey201 Ships arranged for carriage of vehicles with fuel in theirtanks are to be surveyed as required in E.

V. Crane Vessels

V 100 Application101 The requirements given in V apply to ships with theclass notation:

Crane Vessel.

V 200 Annual survey201 The survey requirements are as given in Sec.4 B200.

V 300 Complete periodical survey301 The survey requirements are as given in Sec.4 B300.

W. Tanker for Potable Water

W 100 Application101 The requirements in W apply to ships with the class no-tation:

Tanker for Potable Water

W 200 Complete periodical survey201 At complete periodical survey the following is to be sur-veyed:

— coating in cargo tanks— instruments for pH and conductivity— cargo tank vents.

X. Cable Laying Vessels

X 100 Application101 The requirements in X apply to vessels with the class no-tation:

Cable Laying Vessel.

X 200 Annual survey201 The survey is to be carried out concurrently with the an-nual general survey required in Sec.2.

202 An overall survey is to be carried out and is to include:

— support structure— hydraulic systems— function testing.


DET NORSKE VERITAS

X 300 Complete periodical survey

301 The requirements given in 200 apply in addition to thosegiven in 302 to 304.

302 Bearings and shafts of revolving equipment are to beopened up for examination.

303 Gear wheel and pinions of cable winch are to bechecked.

304 Resistance measurements of electrical systems related tocable laying systems are to be carried out.


DET NORSKE VERITAS

SECTION 4SURVEY EXTENT — ADDITIONAL CLASS. SPECIAL EQUIPMENT AND SYS-

TEMS NOTATIONS

A. Helicopter Deck

A 100 Application101 The requirements in A apply to ships with class notation:

HELDK.

A 200 Complete periodical survey

201 Every survey of the helicopter deck arrangement is to beheld concurrently with the renewal survey of the hull.


— drainage arrangements— surface protection on wooden decks— safety net— lashing arrangements for the helicopter— arrangement for the prevention of sliding— helicopter deck including support.

B. Shipboard Crane

B 100 Application

101 The requirements in B apply to ships with class notation:

CRANE.

B 200 Annual survey

201 The survey required in the following is to be carried outconcurrently with the annual survey required in Sec.2.

202 An overall survey is to be carried out with particular em-phasis on structural integrity, including examination of:

— wire ropes and end attachments— blocks and sheaves— hooks with accessories— shackles— bearings of boom heel and eyebolt connections— securing arrangement for crane during passages— support structure.

203 Slewing system (slewing bearing or hook rollers) in-cluding tightness of bolts is to be examined as found necessaryby the surveyor.

204 Examination and functional testing are to be carried outas found necessary by the surveyor for the following:

— correct adjustment of brakes— resistance measurement of electrical systems— leakages in hydraulic system— safety devices— emergency stop function— fire extinguisher.

205 It is to be verified that the load charts, marking and com-ponents certificates are available and in order.

B 300 Complete periodical survey

301 The requirements given in 200 apply, with the additionsgiven in 302 to 306.

302 Thickness measurements of structural parts are to becarried out as far as deemed necessary.

303 The following components are to be dismantled (openedup) and/or checked by MPI (magnetic particle inspection):

— boom heel bearings— fixed sheaves— blocks— axle pin and housing— eyebolt connections— hooks, ring and balls.

304 Slewing ring is to be opened up, and internal fillets, race-way and bolts are to be subjected to MPI.

Alternatively, if a crane has an approved securing device (re-tainer) fitted, opening up is not required, but at least 50% of theholding down bolts are to be drawn and subjected to MPI.

305 Flatness and condition of bearing mounting flanges areto be checked.

306 A load test, as outlined on Form No. CG 2 in the “Rulesfor Certification of Lifting Appliances”, is to be carried out.

C. Diving Systems

C 100 Application101 The requirements in C apply to ships with class nota-tions:

DSV-I (SF)DSV-II (SF)DSV-III (SF).

C 200 Annual survey201 The survey is normally to include:

— calibration of essential instrumentation (depth gauges, gasanalysers etc.)

— switching from main to emergency electrical power sup-ply

— emergency systems including bell emergencies (buoyancyif applicable)

— functional and power testing of normal and emergencysystems of the bell handling system is to be carried outwith a load of at least 1,25 times the working weight in themost unfavourable position

— partly dismounting of heat protection and penetrators onthe bell may be required.

Detailed specification of test requirements are given in the rel-evant sections of the “Rules for Certification of Diving Sys-tems”.

C 300 Intermediate survey301 The requirements given in 200 apply, with the additionsgiven in 302.

302 The following tests are to be carried out:

— gas leak tests— testing of safety valves— functional test of fire detection-, alarm- and extinction sys-

tems— functional tests of life support systems— functional tests of alarm systems— functional tests of mechanical and electrical systems.


DET NORSKE VERITAS

C 400 Complete periodical survey

401 The requirements given in 200 and 300 apply with theadditions given in 402 to 406.

402 Bell buoyancy materials, heat protection, penetrators,windows and attached members are to be dismounted for in-spection for possible corrosion and deterioration.

403 Pressure tests and inspections are to be carried out ac-cording to Table C1. Test pressure as stamped on the pressurevessels.

The pressure tests and inspections of gas containers are to becarried out according to an approved test program.

404 The working weight of the bell is to be checked.

405 A test of the bell handling system with a static load equalto the design load is to be carried out.

406 If applicable the bell's releasable ballast system with at-tachments is to be structurally tested with a static load 1,5times the weight of the ballast in air.

407 Viewports with an age of 10 years are to be exchanged.

D. De-icing or anti-icing Systems

D 100 Application

101 The requirements in D apply to ships with class nota-tions:

DEICE

DEICE-C.

D 200 Annual survey

201 Visual inspection of anti-icing and de-icing switch-boards and confirm heating load on each circuit according tomarking on the switchboards.

202 Examination of equipment for de-icing and anti-icing in-cluding:

— heaters— covers— equipment for manual de-icing— radar equipment— heating coils— steam tracing lines.

E. Periodically Unattended Machinery Spaceand Machinery Centralized Operated

E 100 Application

101 The requirements in E apply to ships with class nota-tions:

E0

ECO.

102 A maintenance and testing program, stamped by the So-ciety for identification, is to be kept onboard and presented atthe annual and the complete periodical surveys.

E 200 Annual survey

201 It is to be verified that the systematic maintenance andfunctional testing of the instrumentation are performed anddocumented, and that the general condition of the following isto the satisfaction of the surveyor:

— installation of instrumentation equipment with regard toelectrical and mechanical condition, labels, signboardsetc.

— control panels— local indicating instruments.

202 Correct functioning of the following systems is to beverified:

— alarm systems— safety systems— remote control systems— automatic control systems— emergency lighting systems in engine room— communication systems— fire alarm and fire protection systems.

E 300 Complete periodical survey

301 The requirements given in 200 apply, with the additionsand amendments given in 302 to 304.

302 Correct functioning of the various parts of the followingsystems is to be verified to the satisfaction of the surveyor:

— each alarm system— each safety system— each fire detector— automatic control loops— manual control of machinery— remote control of propulsion machinery. It will normally

be required that the following manoeuvres are effected:

— from stop to ahead— from ahead to astern— stop— from stop to astern— stop by operating the emergency device.

303 It is to be verified that the remote control can be trans-ferred to stand-by manual control in the engine room in case ofpower supply failure to the remote control system.

304 When cancelling of automatic load reduction and/or au-tomatic stop of engine are provided, these functions are to bedemonstrated to the satisfaction of the surveyor.

F. Additional Fire Protection

F 100 Application

101 The requirements in F apply to ships with class notation:

F-AMC.

F 200 All F-class notations

201 Fire pumps including emergency fire pump and primemovers are to be surveyed and tested.

202 Fireman's outfit and compressors for charging of air bot-tles are to be surveyed.

Table C1 Pressure testsComponent Maximum interval between each inspection and

pressure testing (years)Gas containersBell, chambers

5 or 10 1)

5 or 10 2)

1) Interval for hydraulic pressure testing of gas containers may be extend-ed to 10 years if the internal inspection reveals no corrosion.

2) Interval for hydraulic pressure testing of bell and chambers may be ex-tended to 10 years if a pneumatic leakage test to 1,1 times the maximumworking pressure is carried out at the complete periodical survey.


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F 300 Class notation F-A

301 The requirements in 200 apply with the following addi-tions:

— fire retarding partitions in the accommodation are to besurveyed

— automatic fire-detecting and alarm systems including re-lease arrangement for self-closing doors in passageways,stairways and machinery casings are to be surveyed andtested

— hose stations in the accommodation together with theirequipment are to be surveyed.

F 400 Class notation F-M

401 The requirements in 200 apply with the following addi-tions:

— main and local extinguishing systems in engine and boilerrooms including detection and alarm arrangements are tobe surveyed and tested. Quantity of extinguishing mediumis to be checked

— portable dry powder fire extinguishers are to be surveyedand spare charges are to be checked

— hose stations in the engine and boiler rooms together withtheir equipment are to be surveyed.

F 500 Class notation F-C501 The requirements in 200 apply with the following addi-tions:

— smoke detector systems for cargo holds, cargo pumprooms, compressor rooms and other service rooms are tobe surveyed and tested

— CO2-systems are to be surveyed and the CO2-quantity ver-ified. Thickness measurements and/or pressure testing ofCO2-bottles may be required if found necessary by the sur-veyor

— foam systems are to be surveyed and the foam quantityverified. Foam forming concentrate is to be analysed everyfive years

— dry chemical powder systems are to be surveyed and thepowder quantity verified

— fire extinguishing systems for deck area are to be tested— portable fire extinguishers for the deck area and cargo

holds are to be surveyed. Spare charges are to be checked— hose stations on deck together with their equipment are to

be surveyed.

F 600 Class notation F-AM

601 The requirements in 200, 300, 400 and 500 apply.

F 700 Class notation F

701 The requirements in 200, 300, 400 and 500 apply as faras these are applicable.

G. Integrated Computer Systems

G 100 Application

101 The requirements in G apply to ships with class notation:

ICS.

G 200 General

201 The purpose of the specified survey is to ensure that thequality of the total integrated system is maintained during thelifetime of the ship. In particular, this includes checking thefunctionality and reliability of the data communication linksand that the procedures and operations defined in the operationand maintenance manuals, are being followed.

G 300 Complete periodical survey

301 Every survey of integrated computer systems is to beheld concurrently with the survey of instrumentation and auto-mation systems for class notations E0, EC0, NAUT, NAUT-AW, NAUT-OC, CCO or POSMOOR.

302 The following are to be checked during the survey:

a) Consistency between the software version numbers as pro-vided in the maintenance manual and the software in-stalled on each unit in the total integrated system.

b) If available, logs from network monitoring equipment andor network process control or task manager. The capacityof the net(s) is to be adequate and maintained. Softwareupdates and or integration of additional equipment mayhave changed the network load or the capacity.

c) Consistency between the back-up procedures as describedin the operation manual and the actual back-up proceduresin use.

d) To protect the system and or process net from becomingcontaminated with virus infected floppy drives, a key lockis to be inserted in the floppy drives or the floppy drivesare to be stored in e.g. a locked cupboard.

e) Presence of access limitations on communication throughthe gateway or router from the administrative net to thesystem net is to be verified.

f) Presence of up-dated virus detection software on adminis-trative net is to be verified.

g) That procedures for upgrades of software, hardware, andfirmware are being followed and that system functionalityis verified after each such upgrade.

303 The following is to be tested during the survey:

a) The integrity of the system with respect to unauthorisedaccess.

b) Screen presentation at start-up of the work and or operatorstations connected to the system or process net. Relatedapplication(s) are to start-up automatically with no user in-teraction. No other application is to be accessible. Pagesare to be checked for relevance and compared to the oper-ation manual.

c) Active control and manipulation of a selection of parame-ters are to be demonstrated from two or more worksta-tions.

d) Available self test and or self diagnosis tools supportingthe functions serviced by the net(s) are to be demonstrated.

H. Centralised Cargo Control for Liquid Car-goes

H 100 Application

101 The requirements in H apply to ships with class notation:

CCO.

H 200 Complete periodical survey

201 Every survey of the centralised cargo control arrange-ment is to be held concurrently with the annual survey requiredin Sec.3 G200.

202 All remotely controlled operations related to cargo han-dling and ballasting are to be surveyed and tested.

203 Alarms and remote readings according to Pt.6 Ch.6Sec.2 Table C1 are to be checked.

204 In the case of computer based systems the relevant re-quirements in Pt.4 Ch.9 are to be controlled.


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205 Arrangement for emergency stop of cargo pumps fromthe cargo manifold area is to be surveyed and tested.

206 Arrangement in cargo control room for emergency clos-ing of valves in cargo lines is to be surveyed and tested.

207 Loading computer is to be tested for the following func-tions as applicable:

— damage stability and strength (by simulating loading con-ditions)

— cargo compatibility with tank coating— certificate limitations.

I. Dynamic Positioning System

I 100 Application

101 The requirements in I apply to ships with class notations:

AUTS, AUT, AUTR or AUTRO.

I 200 Complete periodical survey

201 All sensors, peripheral equipment and reference systemsare to be tested to verify correct operation and adequate accu-racy as compared to previous calibration or specifications.

Failures of sensors are to be simulated to check the alarm sys-tem and the switching logic.

Acoustic reference systems are to be tested with thrusters inoperation.

Switch-over between reference systems as input to controlleris to be carried out to assure that warnings, alarms and infor-mation to operator are satisfactory. Off-location alarm is to bedemonstrated.

202 Each thruster is to be tested with a range of pitches orspeed, and indicating instruments for speed, pitch and azimuthare to be observed for verification of adequate accuracy.

The different modes of thruster control are to be tested for:

— manual control of pitch or speed and azimuth— remote thrust control— controller (automatic) control— transfer of control.

The remote thrust control system is to be tested with the refer-ence system in operation.

The system is to be capable of keeping the vessel in position(not exceeding position boundaries, off-location alarm).

203 The survey of the thruster unit is to be carried out as forthrusters for propulsion, see Sec.1 Table A1 and Sec.2 N.

Guidance note:Survey of the thrusters requires docking of the vessel and shouldbe harmonised with the bottom survey.


204 Opening of prime movers for thrusters may be requiredif found necessary by the surveyor.

205 The electrical installation serving the dynamic position-ing system is to be examined.

206 Testing of automatic reconnection system for generatorsand consumers connected to the bus-bar system(s) is to be car-ried out (simulated test may be accepted).

Power failure to the different sub-systems is to be simulated toverify the intended functioning.

207 The complete dynamic positioning system is normally tobe tested in all operational modes with simulation of differentfailure conditions to try out switching of modes, back-up sys-tems and the alarm system.

Manual override is to be demonstrated during normal opera-tion and failure conditions.

J. Nautical Safety

J 100 Application101 The requirements in J apply to ships with class nota-tions:

NAUTNAUT-OCNAUT-AWNAUT-OC-QNAUT-AW-Q.

J 200 General201 The purpose of the surveys hereafter specified is to en-sure the maintenance of the operational standard which formsthe basis for the class notations NAUT, NAUT-OC, NAUT-AW, NAUT-OC-Q and NAUT-AW-Q. Key areas are thefunctionality of bridge arrangement and the operational rou-tines in relation to those laid down in relevant manuals.

202 The survey specified for a particular class notation maybe carried out six months on either side of due date. When rel-evant, the surveys should be held concurrently with the surveyof automated machinery plants.

J 300 Class notation NAUT-C301 The ships with class notation NAUT-C are subject tosurvey every five years.

302 The bridge arrangement and location of instruments areto be examined in situ. Special attention is to be paid to anyalteration of console arrangement and installation of new cate-gories of instruments which may impede operational routinesor functionality of workstations.

J 400 Class notation NAUT-OC401 Ships with class notation NAUT-OC are subject to sur-vey every two and a half years.

402 The survey required for NAUT-C is to be carried out.

403 Functional testing of instrument and system perform-ance is to be carried out to verify correct operation and ade-quate accuracy.

404 The following systems are to be tested as realistically aspossible to the satisfaction of the surveyor:

— course information system— steering systems— speed measuring systems— depth measuring system— radar systems— traffic surveillance system— position-fixing systems— watch monitoring and alarm transfer system— internal communication systems— nautical communication systems (VHF/UHF)— sound reception system— computer systems, if installed— electronic chart display and information system, if in-

stalled— conning display, if installed.

405 Failure conditions of instruments and systems listed in404 are to be simulated to verify correct activation of alarmsand switching logics.

406 The ability of instruments and systems listed in 404 torecover normal operation after black-out is to be tested.


DET NORSKE VERITAS

407 The bridge working environment with regard to vibra-tion noise, lighting, temperature, ventilation, surfaces, coloursand safety of personnel is to be checked and, where relevant,tested to the satisfaction of the surveyor.

408 All means to prevent accidents caused by sudden opera-tor disability, i.e. monitoring system, communication facili-ties, procedures, etc., are to be checked and tested to thesatisfaction of the surveyor.

J 500 Class notation NAUT-AW501 Ships assigned class notation NAUT-AW are subject tosurvey every two and a half years.

502 The survey required for class notation NAUT-OC is tobe carried out.

503 The automatic navigation and track-keeping system, orgrounding avoidance system installed, is to be tested to the sat-isfaction of the surveyor with regard to route planning func-tions and automatic track-keeping accuracy.

504 The display of required information on the ship's ma-noeuvring characteristics and the contents of the manoeuvringbooklet is to be examined.

J 600 Class notations NAUT-OC-Q and NAUT-AW-Q601 When the class notations NAUT-OC and NAUT-AWare extended with suffix Q, the qualification assurance system,operational procedures and certificates of competence shall beexamined to verify compliance with Pt.6 Ch.8 Sec.9.

J 700 Class notation NAUT-B701 The ships with class notation NAUT-B are subject tosurvey every two and a half years.

702 The survey required for NAUT-C is to be carried out.

703 Functional testing of instrument and system perform-ance is to be carried out to verify correct operation and ade-quate accuracy.

704 The following systems are to be tested as realistically aspossible to the satisfaction of the surveyor:

— electronic position fixing systems— radar systems— automatic radar plotting aids (ARPA)— gyro compass systems— auto steering system (Autopilot)— speed log system— echo sounder systems— internal communication systems— nautical safety radio communication— computer-based systems.

705 Failure conditions of instruments and systems listed in704 are to be simulated to verify correct activation of alarmsand switching logics.

706 The ability of instruments and systems listed in 704 torecover normal operation after black-out is to be tested.

J 800 Class notation NAUT-A801 The ships with class notation NAUT-A are subject tosurvey every two and a half years.

802 The survey required for NAUT-B is to be carried out.

803 Correct display of required information on ship's ma-noeuvring ability is to be examined.

804 Operational safety manuals are to be reviewed to verifythe relevance of established safety routines and contingencyplan.

805 If installed, correct function of doppler speed log is to betested (ships of more than 40 000 tons deadweight).

806 Rate of turn indicator is to be tested.

K. Hull Monitoring System

K 100 Application

101 The requirements in K apply to ships with class notation:

HMON-1 or

HMON-2.

K 200 General

201 The purpose of the survey specified in 300 is to ensurethe maintenance of the hull monitoring system as specified forthe class notation.

202 The operation manual is to be available to the attendingsurveyor during periodical surveys. In addition to the manualthe following documents listed in Pt.6 Ch.11 Sec.1 C101 are tobe available:

— arrangement and layout— test program for software— in-service test program— maintenance procedures.

K 300 Annual survey

301 The operation of the hull monitoring system is to be ver-ified by a surveyor from the Society:

— to ensure that the value of the stress as defined is compat-ible with the output of the loading instrument for the cur-rent condition

— by examination of the recorded data for compliance withthe requirements.

302 The monitoring system is to be calibrated annually asdefined in Pt.6 Ch.11 Sec.4 A301. The calibration is to be ver-ified by a surveyor from the Society.

303 It is to be verified that the following items are availableand in order:

— calibration certificates and recommendations for all rele-vant components of the monitoring system

— operations manual (in English and in a language appropri-ate for the crew).

L. Vapour Control Systems

L 100 Application

101 The requirements in L apply to ships with the class no-tations:

VCS-1

VCS-1B

VCS-2

VCS-2B

VCS-3.

L 200 Complete periodical survey

201 Requirements for survey of the additional class nota-tions VCS-1 and VCS-2 are considered covered by the ruleslaid down for vessels with class notations Tanker for Oiland/or Tanker for Chemicals.

202 For VCS-1B and VCS-2B the following instrumentsand equipment should be surveyed and tested:

— the means to inert the vapour transfer hose— oxygen analyser with alarms— detonation arrester.


DET NORSKE VERITAS

Requirements for survey of the remaining parts of the installa-tion are considered covered by the rules laid down for vesselswith class notations Tanker for Oil and/or Tanker forChemicals.

203 For VCS-3 the details of periodical survey requirementswill be specified in the vessel's “Appendix to the classificationcertificate”.

M. Redundant Propulsion

M 100 Application

101 The requirements in M apply to ships with the class no-tations:

RP

RPS.

M 200 Complete periodical survey

201 The requirements for survey of the additional class nota-tions RP and RPS are considered covered by the rules laiddown for main class.

N. Clean Ships

N 100 Application

101 The requirements in N apply to ships with the class no-tations:

CLEANCLEAN DESIGN.

N 200 Annual surveys

201 The requirements in Sec.2 B900 apply.

202 In addition the following shall be checked/verified asapplicable:

— all refrigerant consumption figures— consumption figures for fire fighting substances with glo-

bal warming potential (GWP) > 0— garbage record boo— oil record books/cargo record book— fuel oil log— NOx emission control equipment log, where applicable— ballast water management log— documentation of antifouling used during dry-dockings

since last review.

O. Gas Fuelled Engine Installations

O 100 Application

101 The requirements in O apply to ships with the class no-tation GAS FUELLED.

O 200 Annual survey

201 The survey shall be carried out concurrently with the an-nual survey required in Sec.2.

202 General cleanliness and maintenance shall be examinedin:

— engine rooms— gas compressor and electric motor rooms, if fitted.

203 The condition of drip trays in the bunkering station shallbe examined.

204 External examination and function test of remote oper-ated valves in the gas piping system shall be carried out. Exter-nal examination of gas pipe ducts shall be carried out.

205 Fire safety

a) Testing of water spray on gas tank if located above deck.

b) Check report for powder extinguishing system in the bun-kering station and in the engine room entrance, if applica-ble. The report shall not be older than 24 months.

206 Reference is made to survey requirements for the classnotation E0 regarding record of systematic maintenance andfunction testing in E201. The survey shall include the gas fuelinstallation.

207 Testing of instrumentation

a) Fixed gas detection unit with alarms.

b) Fixed fire detection system in tank room.

c) Gas tank monitoring: High level alarm, temperature mon-itoring, level indication and temperature sensor in bilgewell in tank room.

d) Gas compressor emergency stop, to be tested from bridge,control room and fire control station.

208 Emergency shutdown system testing shall at least in-clude:

a) Shutdown due to gas detection on two detectors to 20%LEL (with span gas) in either engine room, tank room ordouble pipe outside of the engine room. Shutdown due togas detection on one detector to 60% LEL (with span gas)in double pipe in the engine room. Check that all the cor-rect valves open and close.

b) Testing of automatic disconnection of non-ex proof equip-ment in ESD protected engine rooms at gas detection to20% LEL on two detectors in room.

c) Shutdown due to fire detection in tank room. Check thatall the correct valves open and close.

d) Manual release of emergency shutdown for engine tested.

e) Safety actions at full stop of ventilation in ESD protectedengine tested.

f) Safety actions at full stop of ventilation in duct in intrinsi-cally safe engine room tested.

209 Ventilation system shall be verified functioning in:

— tank room— double pipe— engine room, if ESD protected.

O 300 Intermediate survey

301 All alarm and shutdown functions shall be tested for:

— gas compressor— gas engine.

302 Electrical equipment and cables in gas dangerous zonesand areas

a) Examine general condition of cables, cable trays, cablepenetrations or glands, connection boxes and equipment.Check cables, cable pipes and equipment for mechanicaldamage and corrosion that will affect the explosion protec-tion.

b) Insulation resistance tests. For power, heating and lightinginstallation: Testing carried out within the last 12 monthsmay be accepted.


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O 400 Complete periodical survey401 Gas tanks shall be examined as given below.

a) Internally, including internal piping, valves etc. and in-cluding NDT and thickness testing, as found necessary.Not required for vacuum insulated tanks.

b) Externally, with foundations, as far as accessible.

c) Insulation.

402 Gas tanks safety relief valves shall be examined and test-ed.

403 Gas tanks high level alarm shall be tested.

404 Tank room or secondary barrier space P/V valves andrelief hatches, if fitted, shall be surveyed and/or tested, as rel-evant.

405 Gas handling machinery and equipment shall be exam-ined and tested.

406 Auxiliary systems and equipment for gas installationsshall be examined and tested.

407 Portable gas detectors and oxygen analyser shall be ex-amined and tested.

408 Gastight bulkheads with cable and shaft sealing etc.shall be surveyed. Special attention shall be paid to bulkheadsin the electrical motor and/or compressor room. Shaft sealingshall be checked for lubrication and possible overheating.

409 Instructions, information manuals and signboards shallbe verified as held on board, and that they are displayed,stowed and or mounted in the appropriate locations.


DET NORSKE VERITAS

PERIODICAL SURVEY REQUIREMENTS - DNV GL · PDF filePERIODICAL SURVEY REQUIREMENTS JANUARY 2001...

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