Koc_mv_007field Erected Storage Tanks

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KUW IT

O L

COMPANY

K.S.C.)

STANDARDS PUBLICATION

KOC

STANDARD

FOR

FIELD ERECTED STORAGE TANKS

DOC.

NO. KOC-MV-007

STANDARDS DIVISION



DOC. NO. KO C MV 007

of

73

REV. 1

KOC STANDARD

FOR

FIELD ERECTED STORAGE

T NKS

DOC.

NO. KOC MV 007

ISSUING AUTHORITY:

STANDARDS DIVISION



DOC NO. KOC-MV-007

Page

3 of 73 REV. 1

TABLE OF CONTENTS

FOREWORD

SCOPE

EALTH, SAFETY AND ENVIRONMENT

SEFERENCE CODES, STANDARDS AND SPECIFICATIONS

4.1 National/lnternational Standards

4.2 KOC Standards

4.3 Other Relevant KOC Standards

4.4 Project Specifications

4.5 Units

4.6 Conflicts

4.7 Exceptions/Deviations

ENVIRONMENTAL CONDITIONS

QUALITY SYSTEMS

6.1 Documentation Accreditation

6 2 Inspection Test Plan

6.3 Sub-contractors and Vendors

MATERIALS

7.1 .Material Selection

7.2 Procurement

7.3 Inspection of Materials

7.4 Certification Requirements

7.5 Marking

7.6 Weld Consumables etc.

7.7 Notch Ductility

7.8 Weld Repairs to Materials

DESIGN

GENERAL REQUIREMENTS

8.1 Safe Practice

8.2 Capacity

8.3 Seismic Loads

8.4 Wind Loads

8.5 Wind Girders

8.6

Uplift Overturning Sliding Stability

8.7 Foundations

8.8 Design Metal Temperature

8.9 Corrosion Allowance

8.10 Tank Bottoms

8.1 1 Bottom Connections

8.12 Shell

8 13 Shell Connections General

8.14 Shell Access Connections

PAGE NO.



DOC.

NO

KOC MV 007

of 7

REV. 1

8.15 Stairways Ladders and Platforms

8.16

Cathodic Protection

8.1 7

Earthing Clips

8.18 Settlement References

8.1 9 Calculations

8.20 Drawings

8.21 Weld Details

8 A . 0

REQUIREMENTS SPEClFIC TO FIXED CONICAL ROOF TANKS

8A. 1 Vapour Pressure

8A.2 Vacuum

8A.3 Roof Loads

8A.4 UplifttOverturning Stability

8A.5

Shell Conn ections General

8A.6

Top Angle

8A.7

Roof

8A.8

Roof Support

8A.9

Roof Connections

8A . 10

Sta irway s Ladders Platforms

8A.1 1

Weld Details

PAGE NO.

86 0

REQUIREMENTS SPECIFIC TO EXTERNAL FLOA TING ROOF TAN KS 27

Overall Configuration

Design and Operating Levels

Roof Types

Pon toon Configuration

Double-Deck Configuration

Flotation Compartments

Centre Deck of Pontoon Type

Operating Flowrates

Stability

Ma in Tank Connections

Roof Connections and Openings

Rolling Ladder

Anti-Rotation and Centering Devices

Roof Sealing

Earthing

Roof Support Legs

Gauging

9 0 LOSS PREVENTION

9.1 Fire Protection

9.2 Overpressure Protection

9.3 Venting Capacity

9 4 Sett ing of Protective Devices

9.5

Design of PressureNacuum Protective Devices

9.6

Sparing of PressureNacuum Protective Devices

9.7

Location Installation of Protective Devices

9.8 Overfil l Protection

9 9 Boilover Prevention

9.10 Evaporation Loss Control

9.1

1

Protection Against

Ignition



DOC. NO. KOC MV 007

of

73 REV.

FABRICATION ERECTION

10.1 Health Safe ty Environment

10.2 Fabrication a nd Erection Procedure

10.3

Plate Squareness

10.4 Cutting Forming and Pre-fabrication

10.5 Ma rking and Traceabi li ty

10.6 Plate Preservation

10.7 lnterpass Cleaning

10.8 Weld P rox imi ty

10.9 Preheating

10.10 Post Weld H eat Treatment

10.1 1 Temporary Attachments

10.1 2 Tank Isolat ion

10.13 Coating Lining

10.14

Tank Calibration

SIT INSPECTION TESTING

11.1 General

1 1.2 Welded Joints

1 1.3 Dimensions

1 1.4 lnternals

1 1.5 Floating Roof C ompartments

11.6 Testing Procedure

1 1.7 Shell Tes t

11.8 Floating Roof Test

1 1.9

Fixed Roof Test

11.10 Coils

1 1.11

Internal Examination

.

NON DESTRUCTIVE EXAMINATION

12.1 General

12.2 Volu me tric Examination General Requirements

12.3 Image Quality Indicators

12.4 Film De nsity

12.5 F i l m T y p e

12.6

KOC Acceptance

12.7

Retention o f Radiographs

12.8

Surface Examination

WELDING PROCEDURES QUALIFICATIONS

13.1

General

13.2 We ld Procedures

13.3 Qualification Testing of Weld Procedures

13.4

Welder Qualification

MARKING FINAL DOCUMEN TATION

14.1

Certi fy ing Letter

14.2 Mark ing

14.3

Safety Precautions

14.4

Certification Dossier

.

14.5

Technical Operating and Maintenance Manuals

PAGE NO.

39

39

39

39

39

40

40

40

40

4 1

4

1

42

42

42

43

44

44

45

46

47

47

47

48

49

49

50

50

5

5 1

5 1

5 1

52

52

52

52

52

5 3

53

53

53

54

55

55

55

55

55

56



PAGE NO

15 0 SPARE PARTS MAINTENANCE 56

APPENDICES

APPENDIX A

A.

A.2

A.3

A.4

A. 5

A 6

A.7

A.8

A.9

A. 10

APPENDIX B

APPENDIX C

C.

C.2

APPENDIX

D

APPENDIX E

FIELD

INSPECTION CO:ORDINATION 57

Scope 57

57

orms

Design Documents

Punchlisting

Communications

lnspection Test Equipment Personnel

Activity Notification

lnspection Notification

lnspection Test Records

Repairs, Non-Conformities etc.

ESTABLISHMENT MAINTENANCE OF

WELDER QUALIFICATIONS 60

Qualification Testing

Qualification on Production Welds

Qualification Test Records

Identity Cards

Records

Maintenance of Qualifications through Produl: ior; Welding

DA TA SHEETS

Standard Data Sheet for Fixed Roof or Unroofed Tank

Standard Data Sheet for External Floating Roof Storage Tank.

SUM MAR Y OF DOCUMENTS ACTIONS FOR

KOC APPROVAL 7 1

TA NK CAPA CITY LEVEL DEFINITIONS

7 2

TABLES

Table 8 9

Summary : Internal Coatings, Lining Corrosion Allowance

Table 11 7 5

Hydrotest Hold Points

Table 12 3

Radiographic Sensitivity

ACKNOWLEDGEMENT 73



DOC. NO. KOC MV 007

Page

7

of

7 3

REV.

FOREWORD

This docu me nt has been generated by the Task Force TF-Mech.102) and is approved by the

Standard Technical Comm ittee STC) and Standards Division for use throu gho ut the co rporate

engineering and operat ional funct ion s of Ku wa it Oi l Company KSC).

The docu ment sets o ut t o achieve the fo l lowing:-

To set standard requirements for tanks wh ich are no t project-specif ic bu t wh ich

have general appl icabi li ty for al l n e w construct ion and wi l l ensure a consistent

approach.

To reference established KOC Standards wherever possible bu t to al low other

specif icat ions wherever KOC Standards are pending. A l ist of these to be

appended b y the control l ing departmen t of a part icular project or contract.)

The ut i l izat ion of past operat ional experience to avoid repeti t ion of problems and

t o con sol idate worth wh i le and beneficial features.

Recogn it ion of the di f ferent cr it ical it ies of the dut ies of di f feren t categories of

tanks.

To compreh ensively and clearly cover al l aspects of design, cons truct ion and

tes t ing so as to m inimize clar if icat ions and t o a void disputes.

To avoid con fl icts w ith the basic requirements of API 6 5 0 or other KOC

standards.

To avoid repeti t ion of basic API 6 5 0 requirements.

To standardize wherever a benefi t to KOC is envisaged, b ut to al low some

freedom of design where i t is envisaged tha t th is might resul t in a more

econom ical design or more com peti t ive tendering.

To main tain KOC requirements for safety and environmental prote ct ion as

establ ished b y KOC regulat ions and procedures.

To int roduce data sheets w hich:

i

incorporate al l essential features o f the API 6 5 0 Data Sheet.

ii

maintain consistency w i th th e te xt o f the standard.

iii act as a check sheet to assist in ensuring that al l relevant topics are

considered.

iv) provid e a mecha nism for KOC engineers to specify opt ions perm itted bo th

by th is s tandard and b y API 6 50 .

V

wi l l serve as a us eful consol idat ion of data no t only during design and

cons truct ion bu t also for long term reco rd purposes.

vi)

m ay be ut i l ized retrospect ively for exist ing tanks.



Feedback as we l l as any com men ts or suggestions derived fro m the appl icat ion of this

Standard at any stage of design, con struct ion or operat ion are encouraged and should be

d i rec ted t o

The Superintenden t Standard Division

Chairman, KOC Stds Technical Com mittee)

Engineering Group, K.O.C.

Compliance with this KO Standard

oes

not of itself confer immunity from legal or statutory

obligations

Acknowledsernent

The preparat ion

of this docu me nt has been entrusted by the Standards Technical Com mittee

STC) to th e Task Force TF-Mech102) comprising the fol lowing members:-

Mr. Mo ha mm ed Emam Insp. Corr. Div.) Team Leader

M r. Phil Brooks Insp. Corr. Div.) Autho r, Me mb er

M r. Salah Heika l Insp. Corr. Div.) Me mbe r



DOC.

NO. KOC-MV-007

1 0 SCOPE

This Standard specifies the minimum requirements for materials, design, fabrication,

erection, inspection and testing of vertical, aboveground, field erected, welded steel

tanks.

This Standard is based on API Standard 650 : Welded Steel Tanks for Oil Storage, and

modifies

and/or amplifies the requirements of that standard to suit the specific

requirements of Kuwait Oil Company (KOC) hereafter referred to as KOC . It

extends beyond the scope of API 650 to include tanks which have

a

process rather

than a storage funct ion and also to include tanks intended to contain water for fire

fighting or process use. Tanks with open tops for firewater storage or similar

applications are described as unroofed in this standard to avoid confusion with

external floating roof tanks which are sometimes also described as open .

This Standard is not intended to be applied to the following:

(a) Tanks wi th structurally supported Aluminum dome roofs (API-650

Appendix

G

(b)

Tanks with internal floating roofs (Appendix H)

(c)

Shop assembled tanks (Appendix J)

(d)

Tanks operating at elevated temperatures (Appendix M)

(el

Austenitic stainless steel tanks (Appendix

S

This Standard complements the data sheets (Appendix C] for the equipment, in which

the operating conditions and other basic design requirements are listed in detail.

This Standard is based on the Ninth Edition of API Standard 650 including up to the

1995

Addendum. However, this does not necessarily preclude its use in conjunction

with later editions.

Note To facilitate cross-reference corresponding API

650

clauses which

have been amplified or modified are shown in brackets { ]. These

references are for information only. It should not be assumed that

the API 650 references are comprehensive or complete.

2 0

TERMINOLOGY

Throughout this Standard, the following terms shall have the meaning indicated for

each one:

shall is used where the provision is a requirement to be followed strictly in

order to conform to the standard. (Deviations wil l only be permitted as outlined in

4 7 of this standard.)

will is used normally in connection with an action by KOC rather than by a

contractor or supplier.

should is used where a provision is recommended. (A Contractor must, on

request, be ready to justify any deviation from these provisions.)



DOC NO KOC MV 007

ase

10 of 73 REV. 1

mus t is used where a requirement or act ion is statutory or considered to be

essential.

may is used where an al ternative course of act ion is acceptable within the

l imits of th e standard.

KOC me ans Kuw ai t Oil Compa ny (K.S.C.I.

3.0

HEALTH,

SAFETY AND ENVIRONMENT

Design and con stru ct ion pract ices ( including those of any sub-contractorl shall be

consistent with KOC's Health, Safety and Environment policies and guidelines. In

particular, dur ing construction , and as far as practical during subsequent ope ration and

maintenance, th e risks of all of th e follow ing shall be minimized:-

*

Safety and H ealth of Personnel

Damage to or Degradation of KOC Assets

Dam age to or Degradation of the Environmen t (l iquid discharges or gaseous

emissions whether planned or unplanned)

4.0 REFERENCE CODES, S TA ND AR DS AN D SPECIFICATIONS

4.1

Nationa l Internat ional Standards

Except as modif ied r ampli fied by this Standard, the requirements of API 65 0

latest edit ion shal l be m et together w it h all relevant requirements and

recom men dations of th e standards referenced therein. Standards referenced

herein are l isted b elow:

API RP 2003

A PI 2555

API Manu al o

NFPA-11

NFPA- 15

NFPA-30

API RP 6 51

Cathodic P rotect ion of A bove Ground Petroleum

Storage Tanks.

A PI S TD 65 3

Tank Inspection, Repair, Alteration Reco nstruction

API STD 2 0 0 0 Venting Atmospheric and Lo w Pressure Storage

Tanks.

Protect ion Against Ignit ion Arising ou t of Static,

Lightnin g and Stray Currents.

Me thod for Liquid Cal ibrat ion o f Tanks.

f Petroleum Manage ment Standards Sections 2 A 2B.

Standard for Low-Expan sion Foam.

Water Spray Fixed Systems for Fire Protection.

Flammable and Com bustible Liquids Code

1S0 .900 0 series Qual ity Management and Qual ity Assurance

Standards.

EN. 1 0 2 0 4

Metal l ic Products Types of Inspect ion Documen ts.

A S T M A S M E

As

referenced in the te xt.

BS 3 9 7 1

Image Quality Indica tors for Industrial Radiography.

lnstitut

of Petroleum : Model Code of Safe Practice.



I

DOC. NO.

KOC MV 007 of 7 REV. 1

4.2 KOC Standards

This Standard makes reference to the fol lowing KOC Standards, Recommended

Practices and Standard Drawings:-

4.2.1 Standards

KOC-C-026 : Storage Tank Foundations

KOC-G-007 : Basic Design D ata

KOC-G-009 : Spare Parts Mainte nanc e Data

KOC-ME-026 : Tank Side Entry Impeller Mixers

KOC-P-001 : Painting and Coating of Me tal Surfaces New

Construct ion

KOC-P-002

:

Internal Lining of Tanks and Vessels Part 2 : Rigid

Reinforced Fibreglass Lining

4.2 .2 Recommended Practices

KOC-E-024 : Earthing Bonding

KOC-L-026 : External Cathodic Protection of New Steel Tank

Bot toms

4.2.3 Standard Drawinas

0 1 5-CB-1013 : Earthing Clip

0 1 5-MB-1002

:

Standard Handrail Details

4.3

Other Relevant

KOC

Standards

KOC- 2-033

Bund Wall for Storage Tanks

4.4 Proiect S pecif ications

This Standard also makes reference t o other specifications wh ich should be

designated b y the Control ling Departmen t on a project specif ic addendum sheet.

i) General Welding R equirements

ii

Stru ctura l Steel Design, Materials Fabrication

iii)

Cathodic Protect ion Design Requirements

iv )

The Use of Brackish Wate r for Site Hyd rotest ing

V

Fire Protection Safety Equipment

v i )

Fire Gas Detec t ion Equipment

I

4.5

Uni ts

Uni ts adopted by this Standard are general ly SI metr ic bu t some US Customary

units have been retained for consistency w it h API and AS TM standards or where

these are mo re familiar with in the industry.



DOC. NO. KO C MV 007 Pane 12 of 7 REV. 1

4 6 C onf l i c t s

A n y co nfl ict be twe en this Standard and other drawings, standards, codes,

specif icat ions, contractual or purchase requirements, shall be not i f ied in wri t ing

t o the Superintenden t of the Co ntract for clar if icat ion.

Except ions or deviat ions w i l l only be considered when sub mit ted in wr i t ing and

supported b y evidence of me r i t or just i ficat ion. ( I f docum ents are inadver tent ly

approved or re leased for cons truct ion wh en these sh ow except ions or

deviat ions f ro m th is Standard wh ich have no t received pr ior approval, the n th is

w i l l n o t be deemed to cons t i tu te acceptance b y KOC of these var ia t ions)

Where proposed exceptions and deviations are judged to have general

relevance then the Superintendent of a Contract

m y

bring

these to the

attention of KOC Standards Division for possible incorporation into the next

revision of the standard.

5 0 ENVIRONMENTAL CONDITIONS

For environmen tal condit ions in Kuwait, refer to KOC Standard for Basic Design Data

(KOC-G-0071, wh ic h provides the detailed design inform ation regarding the

environmen tal, si te and ut i l i ty supply condit ions prevai ling throu gho ut the KOC

facil i t ies.

6 0

QUALITY SYSTEMS

6 1 Docum entat ion and Accredi tat ion

The cons tructor shall operate a qual i ty system to ensure tha t the technical and

qua l i ty requirements are achieved. The qua l i ty syste m should be based on IS 0

9 0 0 0 series of specifications or other internat ional ly recognized standard. I t shall

be ful ly d ocum ented and should have been veri f ied by a recognized accreditat ion

scheme.

6 2

Inspe ct ion Te st Plans

Inspe ct ion and test plans covering procurement, pre-fabricat ion and f ield erect ion

shal l be sub mitted for KOC s approval pr ior to comm encem ent. This shall include

bu t no t be rest r ic ted to the re levant inspect ion not if icat ion points lis ted in para.

A . 8 of Ap pendix A of th is s tandard.

6.3 Sub-contractors Vendors

6.3.1

A contra ctor shall ensure tha t

QA

requirements specif ied in the inquiry

and purchase do cumen ts are applied t o al l m aterials, equipme nt and

services provided b y vendors and sub-contractors.

6 3 2

The select ion of sub-contractors for fabrication, erect ion, non-

des truct ive test ing, coatin g and lining shall be subject to KOC approval.

Sub contra ctors wh o fabricate p ipe supports and other non-containment

i tems but with

th

exception of roof trusses may how ever be selected in

accordance

wit

th

contra ctor s qual i ty

system.

------- --.------ --



DOC. NO. KOC MV 007

7 0 MATERIALS

7.1 Material Selection

7.1.1

Materials used for tank fabrication shall be as specified on the tank data

sheet. The materials shall be n e w and shall no t have suffered undue

deterioration in storage or transit. A ny substitutions shall be agreed in

wri t ing by KOC before any procurement or fabr ication commences.

7.1.2

Except wh ere materials have been specified on the data sheet by

KOC,

a Contractor ma y select appropr iate AS TM plate mater ials from those

listed under para. 2.2.2 of API 650, except as below:-

a)

AS TM A 67 8 shall not be used.

b) AS TM A 3 6 shall n ot be used for shell , roof, bo tto m or annular

plates.

2.2.2a)

C)

Com ponents o f frangible joints shall be Group ll lA as a minimum .

d l The bo tto m shell course and annular plates of crude oil tanks in

excess of 50 ,00 0 bbls nominal capacity shall be Group ll lA as a

min imum.

Whe re steels com plyin g w it h specifications of other standards

organizations are offe red as equivalents, the n thes e shall be subject to

KO C s approval.

7.1.3

Selection of plate material for shells and annular r ings shall be limited to

steels

w i t h

a specif ied m inimum tensi le strength of 70 0 0 0 psi or less,

bu t

in

exceptional circumstances, higher grades ma y be acceptable to

KOC in order to l imit shell thickness.

7.1.4

Shell and annular r ing plates shall have a minimum manganese to carbon

ratio of 2.5:1. Rimming steel shall no t be used.

2.2.6)

7.1.5

Annu lar plates shall be of the same material specification and grade as

the bot tom course of shel l plates.

7 1 - 6

All shell nozzle flanges shall be in accordance with A ST M A 1 0 5 or A3 5 0

Gr.LF2.

2.5.1.2)

7.1.7

Piping fo r internal or external connec tion shall be seamless to AS TM

A 1 0 6 Gr. 8, A 33 3- 6 or API 5L Gr. or alternatively m ay be rolled and

weld ed plate of the same specification as the shell. Electr ic resistance

weld ed (ERW) pipe is no t perm itted for shell connections or loaded

structural components bu t may be used for internal distributor or

col lector piping

2.5.1.1)

7 1 8 Bol ts and nuts shall conform to AST M A1

93

Gr. 8 7 and ASTM A 1

94

Gr.2H respectively.

2.7)

7.1.9 Selection of materials f or internals shall take due account of the

possibil it ies of galvanic corrosion and static discharge.



7.2

Procurement

Manufacturers of p lates for the shel l and bo t tom shal l be subject to

KOC's approval.

2.2.6.1)

Unpriced sub-orders for these materials and

for weld ed pipe used for shell nozzle or ma nw ay necks shall also be

subject t o KOC's approval together w i th technical purchase

spe cifications . These should include any relevant requirements for

steelmaking, hea t treatm ent, toughness, form ing, beve ling or coating.

Technical purchase specif ications shall also be sub mitted for f i t t ings

su ch as seals, drains, ventin g devices, f lame arrestors, heating coils,

foam pourers, gauging devices and anodes,

7.3 lns~ection Materials

7.3.1

KOC shal l be afforded th e r ight to inspect any or all material at source.

7.3 .2 In the event tha t KOC opts no t to inspect shel l and bo t tom plates at

source, bu t w he n th e ta nk data sheet indicates any special material

requirements to be applied, then mil l cert i f icates shal l be submitted for

approval pr ior t o loading for transportat ion to Kuw ait. Cert i f icat ion of

any other materials wi l l be subject to checking on receipt of the

materials.

7.3.3

W h e n t is proposed to make large diameter shel l connections fro m plate

rol led and welde d at the C onstructor 's local shop, the n the plate shall be

subject t o insp ect ion on receipt.

7.4 Certification Requirements

7.4.1 Cert i f icat ion shall be provided to the 3.1 .B evel of EN 10 20 4 (DIN

50 04 9) fo r the fo llow ing:- 4.2.1)

(a)

Materials comprising the containmen t envelope.

(b)

W ind girders and compression r ings.

c )

Anchorag e and other load bearing attachm ents.

( d l

Primary supporting sections of roof trusses and girders.

7.4.2

For shell plate and annular ring materials, a check analysis shall be made

b y th e mill , stockis t or contractor to at least the same frequency as

required b y the relevant material s pecif icat ion for tensi le test ing. The

results shal l be furnished to KOC. All elements included in the long

formu la for carbon equivalent as below shall be determined.

7. 4. 3 Th e Carbon Equivalent (C.E.) shall be determined and reported for

materials l isted above u sing the fol lowin g formula:

C.E.

=

C

+

( M n / 6 ) + ( Cr +M o +V ) / 5 N i + C u ) I 1 5

The CE shall no t exceed

0.42

for plates exceeding

25

m m thickness

and 0.4 3 for other

materials comprising or intended to be welded t o

the containment envelope.



Lim its apply to bo th ladle and to produc t or check analyses.

It

wi l l no t

be acceptab le t o assume zero content for a non-determined element for

plates.

However, for materials other than plates for which the relevant

standard does n ot require analysis of all the above elements, it wil l be in

order for acceptance to be on the basis of a maxim um carbon equivalent

of 0 . 35 by the short formula (C

+

MnI6 )

Shell and annular plates shall be marked in accordance w it h the relevan t material

specif ication by the mil l by die stamping.

Other plates m ay be marked by

stenci ling w he n p erm itted by th e material specif ication.

Weld Consumables, etc.

The constructor shall maintain sufficient records to

provide assurance of th e

identity and quality of weld consumables and other materials of construction.

Notch Duc t i l it y

2.2.9.1, 2.2.7.4)

For tank s wh ic h are designed to c ontain hydrocarbons, all plates in excess of 1 9

m m

thickn ess for shell, annular r ing, nozzle and m anw ay necks, anchors and

reinforceme nt shall be subject to impa ct testing. Testing shall be in accordance

w it h sectio n 2.2.10 of API-650 , bu t the tes t temperature shall be O°C in all

cases.

Weld Repairs t o Mater ials

7.8.1

W hen unacceptable defects are found in mater ials forming part of the

tank containm ent (other than after removal of temporary attachments

wh ich is covered by paragraph 10.1 1 of this Standard), and whe n a

cons tructo r proposes t o undertake we ld repair, he shall subm it his

proposals to KOC 's site representative for approval, including we ld

procedures, qualification records, heat treatm ent procedures and

NDE

proposals.

7.8.2

The cons tructo r is required to keep records of w eld repairs t o materials,

t o make these avai lable for review, and to include the m in cert if ication

dossiers. These should record the nature, location and depth of defects,

th e w el d procedure(s) used and NDE techniques emp loyed and include

NDE and hea t treatm ent records.

7.8.3

W he n defects have been excavated w it h a view t o repair, ncr i f ication

shall be given t o KOC's f ield inspection representative for w.

. . qC

of

NDE and inspection.



8

DESIGN

GENERAL REQUIREMENTS

8 1 Safe

ractice

For topic s and features n ot addressed in detai l 'in this Standard, the design shall

incorporate the relevant recommenda tions contained in the various parts of the

Inst i tu te of Petroleum Mod el Code of Safe Practice.

8 2 Caoacity

8.2.1

The basis of capacities shall be as indicated on the Appe ndix

E

sketch.

8.2.2 Fixed roof and unroofed tanks shall be ordered on the basis of nominal

(rated) capacity .

8.2.3

Floating roof tanks m ay be ordered on the basis of either safe operating

capa city or net working capacity . Whichever basis is used, the tank

designer shall determine and set the other defined capacities.

8 3

Seismic Loads

W he n the T ank Data Sheet specifies tha t seismic design applies:-

a)

b

c

d

e

8 4 Wind Loads

Importance factor shall be taken as 1.0 except where otherwise

specif ied on the Data Sheet.

Site coe fficien ts shall be as specified o n the Data Sheet or as

agreed b y KOC based o n a si te survey.

Whe re seismic design requires shell thickness t o be added, the

min imu m amount to be added shall be the greater of the seismic

element or the corrosion allowance.

Appro priate consideration shall be given to possible comb inations

of

loadings fr om sources such as earthquake, wi nd and internal

pressure.

Configurat ions of f loat ing roof crude oil storage tanks whic h

require anchorage against seismic effects shall be subject to

KO

approval.

Tanks shall be designed for wind loads arising from a design wind speed

V

of

45

m /s o r 10 0 mph .

Prevail ing wind directions are given in KOC-G-007.

8 5 Wind Girders

8.5.1

The spacing of intermediate wind girders shall be based on the net

thick nes s (i.e: corroded thicknes s) o f shell plate.



DOC.

NO.

KOC MV 007

of 7 3

REV.

8.5.2.

A

suf ficien t numbe r af holes shall be provided for drainage of rain or

deluge water when the section is not inherently self-draining.

8.5.3

The top of an open tank

(unroofed or external floating ro of) shall be

sti f fened by a top curb angle 3.9.3.2) and by a wi nd girder located one

metre be low the top of the curb angle which shall also be designed to

serve as a aal kw ay. 3.9.4) The ef fect ive w idth of the w alkwa y shall

be 1 0 0 0 m m minimum, and an outer handrail and kickplate shall be

provided around th e en tire periphery. The wa lkw ay shall be reached

from th e access stairway of an open top tank or by access stairway

from th e gauger s platform of a f loating roof tank.

8.6

U ~ l i f t Ove rturnina Slidina Stab ilitv

Stability and /or anchor loads shall be calculated for all tanks.

safety fact or of 1.5 shall be applied to sliding.

8 7

Foundations

The tank foundations shall be in accordance w ith KOC-C-026.

8.8 Des ian Me ta l Tem ~er a tu r e

M inim um m eta l design temperature shall be nominally plus 1OVdegreesCelsius.

This is a conservative f igure equal to the minimum al lowable test water

temperature an d is som ewh at low er than the f igure der ived fro m published

lowest one day mean temperature data for Kuwait.

2.2.9.3)

In any case,

impa ct testing of plate mater ials shall be in accordance w ith paragraph 7.7 of

this Standard and we ld procedure qual i f ication impa ct testing shall be in

accordance w it h paragraph 13.3.2 of this Standard.

8.9 Corrosion Al lowance

Corrosion allowances shall be as Table

8 9

below:



DOC. NO. KOC MV 007 age 9 of

73

REV.

8.10 Tank Bottoms

The tank bottom shall have a slope of 1 in 120 from the centre down to

the periphery (Apex up).

All tanks shall be provided with annular plates on which the shell plates

shall rest. 3.5.1)Minimum width for annular plates shall be 750 mm.

{3.5.2){E.4.2)

Minimum un-corroded thickness of annular plates shall

be 0.35 x the thickness of the bottom shell course or 0.375 whichever

is the greater.

3.5.3)

Water draw-off sumps shall be provided as shown on the tank data

sheet. These shall be located so as to clear any 3-plate lap joints in the

tank bottom and the bottom to annular joint by a minimum of 12 inches.

Plating shall be 0.375 thick minimum. Draw-off piping from sumps

shall be provided with a single pair of flanges inside the shell to facilitate

removal and shall be securely supported from the tank bottom.

The minimum thickness of rectangular and sketch bottom plates shall be

0.375 including corrosion allowance.

3.4.1)

Flat wear plates shall be provided below dip pipes and under pipes

discharging against the tank bottom.

Wear plates shall also be provided in the vicinity of mixers. These shall

be minimum 0.1875 plates continuously welded to the bottom and

around the shell connections prior to applying the bottom lining.

8.1 Bottom Connections

when. connections are required to be made to a tank bottom, the

recommendations of A3pendix of API 650 shall in general be followed. Unless

otherwise agreed by KOC, the arrangement shown in fig.O-2 shall be provided.

The connections shall be located so as to clear any lap joints in the tank bottom.

The shell thickness shall be calculated using the one foot method for

tanks up to and including 30 metres diameter.

3.6.3.1)

Finite element

analysis techniques shall

be applied to tanks with diameters 61 metres

and larger. 3.6.5)

Any proposal to utilize banding to confine

the shell stress of large

tanks within the limits allowed by API 650

shall be subject to KOC

approval.

A

specific gravity of 1.02 shall be used for computing both the design

shell thickness 3.6.1.3)and the hydrostatic test shell thickness

3.6.1.4)except that when a higher value s indicated on the data sheet

this higher value shall be used.



8.13 Shell Conn ections General

8.1 3.1 In general, all nozzles

/

manholes shall be of the flanged type. Howe ver

foa m cham bers ma y be moun ted on studded pads welded t o the shell .

8.1 3.2 Wh ere anti-v ortex arrangements are required for pum pout, th ese shall be

as indicated on the tank data sheet. In the case of the oi l out lets of

f loat in g roof tanks, vortex breakers are mandatory t o a l low for the

possibi l i ty of t he installat ion of pumps in the future.

8.1 3. 3 Anc horin g brackets, if required, shall be provided at centres specified in

API 650. Caution shall be exercised in locating brackets so as not to

lan d or interfe re w it h stress relieved assemblies, shell vertic al seams or

other appurtenances or reinforcement plates.

8.13.4 Shel l

nozzles shall be designed no t only for the static l iquid load (3.7.2)

bu t also for the loads imposed by connecting pipework, and in the case

of ma nw ay s ut i lized for moun ting of side entry mixers, for the loads

trans mitted b y the mixers. For connections si tuated in the bo tto m shell

course, it shall be verif ied that allowable loads derived fro m Appendix

P

of A PI-65 0 are not exceeded. (3.7.1.5)

8.13.6

L o w typ e shel l reinforcement plates 3.7.3.3) hall only be used where

it

is impract ical to raise the nozzle opening by an amount suff ic ient to

avoid this condit ion.

8 .1 3.5 All shell nozzle reinforcem ent plates shall be of the same m aterial as the

shell. These plates shall be provided w it h

114

diameter threaded vent

tel l tale holes to faci l itate pneu matic test ing and after test ing shall be left

unplugg ed bu t weather sealed w ith grease.

(3.7.6.1)

8.13 .7 For piping route d t o nozzles at high shell elevat ions or on the tank roof,

sui table support pads and reinforcing steelwork shal l be provided to

enable such piping to be completed after tank hy drotest.

8.14 Shell Access Connections

8.14 .1 Requirements for the number and

or ientation of 36 x

48

f lush type

clea nou t doors shall be as indicated on the tank data sheet.

8.14 .2 One of the shell ma nwa ys shall be located near the foo t of the main

acces s s tairwa y or ladder. The others shall be spaced approx imately

equally.

8 . 14.3 Shel l ma nw ay s shall be at least

24

nominal and shall be provided wit h

suitable hinged

cover davits. Man way s shall be provided wit h external

hand grips positioned approximately

400

m m above the top o f the

manhole. Internal handgrips shall also be provided excep t th at whe n

the y wo uld be located in a f ibreglassed area they shal l be omitted.

8.14.4 Wh en rnanwa ys are also

used

for mounting side-entry mixers, they shall

have ANSI type forged flanges.



DOC. NO. KOC MV 007 Page

21 of

73 REV.

1

8 15

Stairways, Ladders Platform s

8.1 5.1

M ain access t o the to p of a f ixed or f loating roof tank shal l be provided

b y an outside double str inger radial stairwa y 1000 m m wide or, for f ixed

roof tanks only, b y a spiral stairwa y where so indicated on the tank data

sheet.

A

rad ia l s ta i rway shal l ex tend to the tank bund wal l wi th

addition al provision for access from inside the tank bund area.

8.15.2

M ain access to the top windgirder wa lkway of an unroofed tank shal l be

by spiral stairway.

8.15.3 Stairways shal l have a minimum width of 1000 m m and be arranged

w it h the angle of s lope t o the hor izontal plane from 35 degrees to 40

degrees. Angles greater than 4 0 degrees shall be subject to approval by

KOC.

8.1 5 .4

Interm ediate landings shall be provided at approximately

6

metre

intervals for all types of fix ed sta irways and ladders.

8.1 5.5

All treads and plat form floors shall be galvanized safe ty tread or equal as

approved by KOC Hand and knee rails and 200 m m high toe kick plates

shall be pro vide d f or platform s, and hand and knee rails shall also be

provided for stairway s. Handrails shall confo rm to Standard Draw ing

0 1 5-MB-1002.

8 16

Cathodic Protection

8.16.1

Cath odic Protec tion shall be generally in accordance w it h the designated

Project Specification and with API RP 651. Reference should also be

ma de to t he S cope of W ork fo r delineation o f responsibil it ies.

8.1

6.2 In addition t o protective coating, the underside of all tank bo ttom s shall

be cathod ically protected by an impressed current system i n accordance

w i t h KOC-L-026.

8.1 6.3

An

impressed current system shall be applied to the internal surfaces of

tan ks contain ing predominantly aggressive wate r such as fire, brackish

or untreate d seawater. Cable support studs shall be provided for

unro ofe d tanks, and arrangements shall be m ade for conn ecting and

suspending the

C.P.

Anodes.

8.1

6.4 Fixed sacrificial anodes shall be installed in tanks conta ining fuel gas

blanketed or treated wa ter.

.

8.16.5 N o additional internal cathodic protection is required for oi l tanks w ith

bo tto m s lined wi th fiberglass (or equivalent thick ) l inings.

8 17 E arth in a C l i ~ s

Earthing facil it ies shall be in accordance with c lause

8.5

of KOC-E-024 and

Standard Drawing 0 1 5-CB-1013.



8.18 Sett lement References

TO facil i tate settlem ent checks, reference markers shall be prov ided on the shell

at an elevat ion of

1

m and at an early stage of erection. They shall be made

from angle bar, 5 0 x 5 0 mm and 10 0 m m long. The number and distr ibution

of markers shal l be accordance w it h 10.5.1.2 of API Standard 653 except that N

shall be roun ded up to the ne xt mult iple of four. Whe n large connections are

made to th e tank bottom , additional reference markers shall be provided inside

th e shell to enable their sett lemen t to be checked. Wh en a tank is to be

con structe d b y a jack-up metho d, the erection procedure shall address other

means of mo nitor ing foundation sett lement during erect ion.

8.1 Calculations

8.19.1

Detailed design calculations are required. Com puter printo uts wh ich

hav e insuff ic ie nt steps or wh ich do no t declare input data and

assumptions wi l l n ot be acceptable.

8 19 2 Calculat ions t o be subm itted for approval or information shall include

any o f th e fol lowin g aspects which are applicable.

Nozzle sizing, process and hy draulic.

Deriva tion of allowable stresses. (3.6.2)

Design pressure

P

(F.4.1) and ma ximu m design pressure P

(F.4.2) for tanks su bject to small internal pressures.

Found ation and annular ring loading.

Required comp ression area at th e roo f to shell.

Shell thicknesse s.

(3.6.1.3,

3.6.1.4)

Ven ting ( including open vents, r im vents and autom atic bleeder

vents) and emergency pressure relief.

Overf low capacity.

Anchorage.

Cathod ic prote ction (curren t density, anode l ife etc.)

Uplift.

Sliding.

Required top win d girder sect ions for open to p tanks.

{3.9.1){3.9.6.1}

W ind induced buckl ing

/

intermediate win d girder heigh t section.

(3.9.7)

Roof support.

Shell opening reinforcemen ts (3.7.2) (including significant piping

loads a t nozzles (3.7.1.5))

Support of b otto m connections (0.2.3)

Rainwater drainage from floating roofs.

Buoyancy, stabil i ty and strength of f loating roofs.(C.3.4)

Wa ter and foam requirements for f i refight ing.

Derivat ion of sett lement l imits.



DOC. NO. KOC MV 007

8.20

rawinqs

Drawings shall be issued to provide as a minimum the information listed below.

8.21 Weld

Details

8.21.1 The

Design pressure (for fixed roof tanks) and design temperatures

(minimum design metal temperature and other limitations such as

for coatings or linings).

Allowable stresses.

Material specifications and grades.

Required and/or nominal thicknesses.

Dimensions.

Weights

Dimensional tolerances.

Slopes.

References to any Standard Drawings.

NDE

requirements (including any NDE of butt welds in roof support

trusses or rafters.)

Proximity limits for openings 3.7.3)and for both permanent and

temporary attachment welds.

Location of major load bearing temporary attachments (eg for roof

raising)

Weld details and dimensions. Special attention shall be given to

the profiles and tolerances of fillet welds connecting the shell plate

to the bottom annular plate and to frangible joints.

shell to bottom joint shall be made with a minimum of two weld

passes on each side of the shell. Each leg of the finished weld shall be

of equal length.

8.21.2 The bottom rectangular and sketch plates shall be lap welded with

double-pass fillet welds to provide continuous drainage to the periphery.

8.21.3 The shell vertical and horizontal joints shall be double butt-welded with

full penetration and fusion. For floating roof tanks only, abutting shell

plates at horizontal joints may at the designer's option have their internal

surfaces aligned. However there shall be no measurable overhang .

3.1.5.2, 3.1.5.3)

4

All piping supports and other welded attachments to the shell, bottom

and roof shall be welded to pads and not directly except for nameplate

brackets, earthing clips and settling markers. Pads welded to the shell

shall have any corners radiused to 5 mm minimum.

8.21.5 Internal fillet welded attachments shall

as far as practicable be seal

welded.

The use of non-seal welded internal fillets direct to the shell or

bottom shall be subject to KOC's approval.

Seal welding is mandatory

on tanks susceptible to pyrophoric scaling.



DOC.

NO. KOC-MV-007 I

age

24

of

73 REV.

1

8A .0 REQUIREMENTS SPECIFIC TO FIXED CONICAL ROOF TANKS

8A.

1

V a ~ o u r r es su re

8A .2 Vacuum

8A.Z . 1

Tanks w it h f ixed roofs shal l always be designed for a vapour pressure.

Tanks w it h open vents shall have a design vapour pressure assigned

such as to avoid l if t ing of the roof plates

1.1.1)

Tanks wh ich normal ly operate wi th a vapour pressure whether this

arises fro m gas blanketing or from vapour evolut ion from the contained

liquid shall have a design vapour pressure assigned to provide a

suitable operat ing margin t o minimize discharge to the environment

fro m pressure relief valves.

Tanks w it h open vents shall be assigned the basic 1 inch water gauge

vacuum design.

3.2.4)

The basic 1 inch water gauge vacuum design shall also be applied t o

other tan ks as far as practicable. How ever a higher design vacu um

m ay b e deemed necessary for operational reasons, or t o l imit the

number o f vacuum breakers required for tanks from wh ich vapour

recovery compressors draw .

In

such cases, the higher design vacuum

shall be supported b y finite element analysis or other appropriate

calculat ion method, and shal l take into considerat ion the combined

effe cts of win d loading and external pressure vacuum ) on the empty

tank.

8A .3 Roof Loads

The uniform l ive load to be applied in the design of a f ixed roof and i ts support ing

structure shall be in accordance wi th API 6 5 0 3.10.2 .1.

8A.4 Uulift Overturnins Stabi l i ty

Shel l dead we ight

W)

shall be corrected for up lift due to design pressure rather

tha n due t o operat ing pressure.

3.1

1)

8A.5 Shell Conne ctions General

8A.5 .1 Inclined inlet distributor pipe w it h slots/perforations ex cep t on upper

3

me ters section) shall be provided inside crude test tank s and dry crude

tanks . Horizo ntal spreader co llecto r pipes shall be provid ed inside

w e t crude tanks. Oi l inlets shall be sized such tha t f l ow veloci ty does

no t exceed 1.25 m/s.

Interna l pipes shall be provided w it h flanges t o ensure easy removal /

installation throug h manholes and shall be protected internally and

externally w ith epoxy coatings. When agreed by KOC, they may be

designed for rem oval through cleanou t doors.



A top angle shall be provided with the horizontal leg turned outwards 3.1.5.9)

except where a strong roof to shell joint is specified by KOC in which case detail

h of API 650 Fig

F 1

shall be used.

Roofs shall be of conical form whether they are supported or of the self

su,pporting type.

8A.8 Roof u ~ ~ o r t

8A.8.1

Roof supporting columns and trusses shall be designed in accordance

with the designated Project Specification covering structural steelwork,

and taking into account the appropriate loadings applied to them from

all possible sources. Roof suppox columns of hollow section shall be

designed to be internally dry and shall be seal welded top and bottom.

It shall be verified that the loading of any support column will ensure

that it cannot become buoyant.

8A.8.2

Support columns shall be provided with means of height adjustment to

compensate for settlement.

8A.8.3 The base of support columns shall be restrained against lateral

movement irrespective of whether or not the tank is designed to

withstand seismic loads.

E.8.2)

8A . 9

Roof Connections

8A.9.1

One or more 24 diameter roof manways shall be provided complete

with suitable davit arms / hinges. These will be primarily for venting

purposes during maintenance work rather than for access.

8A.9.2 Unless otherwise specified, oil tank roofs shall be equipped with a

centre cylindrical gas dome to which the tank vapour line and vent

shall be connected. Both the diameter and cylindrical height of the

dome shall be at least twice the diameter of the vapour outlet

connection, but with a minimum of 900 mm.

8A.9.3 Main vapour connections to the tank roof shall be adequately

reinforced to take care of vibration tress transmitted by piping.

8A.9.4

2 diametrically opposed dip hatches with covers and dip-tubes shall be

provided near the stair and ladder heads of crude oil tanks. The

hatches shall be readily accessible and suitable for manual dipping. The

dip-tubes shall be protected internally and externally with epoxy

coatings, and shall be provided with two rows of slots (50 mm

x

300

mm) facing the shell and continued above the maximum level of the

liquid.

Flat plates, not be less than 600 mm square, shall be provided below

the dip pipes. They shall be mounted level not less than 7 mm from

the tank bottom and supported from the tank shell.



8A.9.5

Nozzles for purging the tank shall be provided at the highest point of oi l

tanks (gas dome) and at an elevat ion of

900

m m above the tank

bo t tom.

8A.10 Stairways, Ladders

Platforms

{Tables 3 -19 to 3-21)

8A. 10.1 A wa lkw ay shall be provided giv ing access to the ro of f rom the head

of the s ta i rway.

8A. 10.2

W hen the roof s lope exceeds 1

12,

access to al l accessories located

aw ay fro m the r im shal l be bar t readed. Handrai ls shall surround the

acces sories area, and hand and knee rails and

200

m m h igh toe k ick

plates shall be provided for plat forms and the complete c ircumference

of the roof .

8A.10.2 A vertical caged ladder shall be provided as a secon d means of

escape from the roof and shall be located at the opposi te side of the

tank roof t o the main stairway. This ladder may also be ut i lized in

conjunc t ion w it h plat forms to access instruments, valves, foam

chambers etc.

8A .

1 Weld Details

8A .

1 1 1 The top angle-to-shel l jo int of f ixed roof tanks shall be butt-welde d

w i t h complete penetra tion and complete fus ion except where

KOC

approves a design with continuous double f i l let welding. 3.1 -5.3)

8A.1 1.2

Frangible roof to shel l jo ints shall not be offse t by mo re than hal f the

dimension of the angle leg from the vertical l ine of the shell.

8A. 1 1.3 Roof plates shall

be lapped so tha t the lower edge of the up permost

plate is beneath the upper edge of the lower plate ( ie. opt imized for

internal drainage of conde nsation rather than for external drainage).

Plates shall be cont inuous f i llet welded on the outside wit h a

min imum 25 mm over lap.

3.1.3.5)

Double pass welding is

man datory on roofs requiring leak t ightness. Double lap or bu tt

welding is mandatory on tank s suscept ible to pyrophoric scaling.



88 .0 REQUIREMENTS SPECIFIC TO EXTERNAL FLOATING ROOF TANKS

8 8 .1 Overall Confiauration

Prior t o proceeding w it h detailed design, the fo l lowing features shall be

established:-

Overall height and diameter.

Min imu m and m axim um operat ing levels and measures proposed to

optimize these.

Roof type.

Shell material specification(s1 and gra de b).

Proposed arrangement o f m ixers ( if required) and mixin g timetab le.

Rim seal ty pe and materials.

Roof drain typ e and m inimum maintenance / replacement intervals.

Sealing facil i t ies for deck fitt ings.

Note ontractor should be required to submit the above data prior to

award

8B.2 Oesian and Operatina Levels

86 2 1

Levels and associated capacities shall be as defined in Appe ndix E o f

this standard.

8B 2 2 For the purposes of c alculating shell thicknesses o f f loating roof

tanks, the level t o the to p of the top angle shal l be used in

conjunct ion w it h the hy drostat ic test stress S,

3.6.1.4)

and the

design l iquid level shall be used in conjunct ion wi th the product

des ign stress S,

3.6.1.3).

8 8 .3 Roof Tvpes

Floating roofs shall be ei ther o f the pontoon or double deck typ e. Pan typ e roofs

are no t permissible.

C.1)

8 8 .4 Pontoon Confiquration

The top pontoon deck shal l s lope downw ards towards the centre o f the tank

and the bo tto m pontoon shall slope upward s towards the centre. ( ie low ty pe

roofs are no t permissib le) The height of attachment of the centre deck to the

inner pon toon r im shall be at a height such that no signif icant bendin? mom ent

is

applied to th is jo int wh en the roof is f loat ing normally (w itho ut s. id it iona1

loading from rainwater accum ulat ion or po ntoon f looding).

88.5 Double

Deck

Confiauration

The bo tto m deck shall slope upwa rds towards the centre of the tank. The top

deck ma y either slope t o drain tow ards the centre ( converging double deck

type) or

t

may s lope d ow n f rom both the r im and the'centre.



DOC. NO.

KOC MV 007

Paae 28 of 7 I REV. 1

8B.6

Flotation orn~artrnents

88.6.1

Com partme nts shall be designed and constructed so as t o provide

reasonable

access for inspection and maintenance. Where stiffen ing

is necessary, preference shall be given t o underside external

stiffen ing. A ny internal stiffen ing shall be essentially non-ob structive

to personnel.

88 .6 .2

All com partme nts and bulkheads shall be internally seal welded along

top, bo ttom and vertical edges.

88.6.3

Topside surfaces, including the outer r im, shall

be

painted.

88 .6.4 The m inimum thickness of the botto m deck shall be 6 mm . The

minim um thickness of outer r im plat ing shall also be 6 mm except

whe re a greater thickness is specified on the D ata Sheet. C.3.3.2)

88 7 entre Deck of Pontoon Tvoe

85.7.1 The minim um thickness of the botto m deck shall be 6 mm.

C.3.3.2)

8B.7.2 The joint betwe en the centre deck and inner pontoo n r im shall be

sufficie ntly reinforced whe re necessary to minimize the possibil ity

of fai lure at this location due to f lexing of the deck.

88.7.3 Fabrication of th e centre deck shall ensure that

t

is essentially flat in

form. If fabricated on the tank bo ttom, steps shell be taken to ensure

that th e deck does not take the conical form of the b ottom .

8B.8 O~era t inaFlowrates

For oil storage tank s the overall design and the operating ma nual shall specify

a suitably lo w fil l ing rate at comm issioning and at start-up after maintenance

shu tdow n to avoid the tendency of bal looning of the centre deck of

pon toon typ e roofs due to higher than normal amounts of gas being

introduced in to the tank. In any case the inf low rate shall be such that a f lo w

veloc i ty of

3

f t / s is no t exceeded up to the p oint at wh ich the roo f leaves i ts

supports, in accordance with the recommendation in c lause 4.2.b of API

RP.2003.

88.9 Stabi l i ty

88.9 .1 In addit ion to the buoyancy cr i ter ia of C.3.4.1 of API-650, a

pontoo n type roof shall also have suff ic ient buoyancy to

remain afloat on product of the low est specif ied specif ic gravity

wi th the centre deck f looded wi th f i rewater and two adjacent

pontoons concurrently f looded with product.

88 9 2

The designer shall declare the allowa ble stress and stab ility criteria

tha t he proposes to use to ver i fy strength and stabi li ty. The t lt

which needs to be taken into account in sett ing the up ward height

of

sl w~ s

rocnd deck

penetrations shall

e detsrmined. C.3.4.2)



DOC. NO. KOC MV 007 Page

29

of

73

REV.

1

88 10 M ain Tank Connect ions

8B.10.1 The oi l in let shal l be arranged to project wel l into th e tan k so as to

avoid th e local accumulation o f entrained gas under the roof deck or

overpressur ing o f the seal. I t shal l also be arranged to minimize

turbulen ce whi ch m ay affe ct the roof seal, roof drains, m ixers, etc.

88.10.2 The oi l outlet shall connect to the tank bott om plates unless

otherwise agreed by KOC. A

weir shall be provided around this

connection wh ich shall also be provided w ith

a

vortex breaker. The

weir height shall be as indicated on th e Da ta Sheet.

The bore of the oi l outlet, up to th e fi rs t flange outside the tank, shall

be lined wit h the same system as applied to the tank bottom .

88 11 Roof Connections 8 O~en inc rs

8B.11.1 M a n w a v s

A

second m anw ay shal l be provided for each double-deck buoya ncy

com partm ent i f , in KOC s judgment, th e size and/or configuration is

such th at a s ing le ma nwa y wo uld be insuf f ic ient to prov ide safe and

rapid escape. (C.3.5)

8B. 1 1.2 Deck Ha tche s (C.3.11)

T w o 30 deck hatches shal l be provided for al l tanks, located

diametr ical ly opposite to provide access from th e underside t o

tops ide

of the roof dur ing maintenance. In the case of double deck

roofs , the top and bot t om deck openings shal l be connected by a

tube w i t h ladder rungs. The b ot to m deck opening shal l not be

covered.

88.1 1.3 Primarv Roof Drains (C.3.8)

88.1 1.3.1 The rainfal l to be considered in s iz ing roof drains is

defined in KO C-G-007.

88.1 1.3.2 Primary roo f drains shall be of either th e articulated joint

or f lexible hose typ e as specif ied on the D ata Sheet. The

drain pipes shal l be located so tha t they are not unduly

af fected by the forces imposed by the operation of the

mixers or by th e tank in le t f low.

88.1 1.3.3 The ma xim um nom inal size of ar t iculated drain l ines shal l

be 4 .

A n ad dit ional drain shall be provided i f one - 4

dra in would have insuf f ic ient capac i ty . t is not

permissible t o branch t w o drain l ines fro m a single deck

opening.

8B.11.3.4 For pontoon type

roof s the check valve shall be made

access ib le f rom the top of the deck by mount ing it i n a

recess. This shalt afiow the va lve to be rep laced wi th out

entry in to the tank.



88.1 1.3.5 The dra in shall be va lved at the tank shell so tha t t can

be iso la ted in the event o f fa ilure of the p ipe ins ide the

tank.

I f more than one dra in is prov ided then each one

shal l be indiv idual ly valved at the shel l.

Emerqencv Drains

Double deck roofs shall be provided w ith at least one emergency

drain (draining into the product) .

It

shall be located close to the

centre. I ts upwa rd project ion shal l be such as to be mid wa y between

t h e

high and low p oints of the upper deck. Inside the tank, th e drain

shall be f i t te d w ith a def lector to minimize vapour losses.

Maintenance Drains

Pontoon type roofs shall be prov ided wi t h tw o 3 brass drain plugs,

one located close t o the centre and the other c lose to the inner r im

and f i t ted f rom the top for use when the roof is landed on i ts

supports.

The drainage o f double deck roofs may be achieved by removing

(unscrew ing) the emergency drain.

Roof Vents

C.3.9)

88.1

1.6.1

The arrangement and configura tion of al l roof vents shall

be such as to m inimize the possibi l ity of oi l contaminat ion

of w orking snd seal ing components.

88.11 6 2

A minim um of one r im vent shall be installed for each

tank.

88.1

1 6 3

The design, size and location of automatic bleeder vents

shall be adequate to breathe air / vapours at a volum etric

rate at least equal to the maximum tank out f lo w and to

tw ic e the specif ied commissioning l iquid inf low . A t least

one bleeder v ent shall be located near the centre of the

deck.

88.11.6.4 Pontoon type roofs shal l a lso be prov ided w i th t w o

weigh ted pressure relief valves to discharge excess tank

vapour and incondensibles whi lst the roof is af loat. One

of these dev ices shall be located wi th in one to tw o

metres of the centre and the other shall be located

adjacent to th e inner r im and or iented 180 f rom the p ivot

of the roll ing ladder. The set pressure of each valve shall

be

2 5 %

above the pressure exerted by th e we ight o f the

centre deck and i ts f i t t ings so that there wi l l be no

discharge under normal operat ion, b ut only in the event of

a pronounced bal looning of the centre deck.



88.1 1.7 Sam~ lina atch

A sampling hatch shall be provided where required by the Data Sheet.

The hinged cover shall be brass to preclude the risk of sparking. A

bare steel datum plate shall be provided below the sampling hatch to

enable this fitting

to be used as an alternative gauging device. This

shall be mounted level on the lined bottom and held in place y resin

as for the manual still well.

88.1 Rollina Ladder (C.3.7)

88.12.1

A rolling ladder with rails shall be provided for all floating roof tanks.

The rails shall be welded to pads and not direct onto the roof deck.

The ladder shall connect to the gauger s platform. The pivot and

wheel bearings shall be of a type which does not require any

lubrication after commissioning. The wheels shall be non-sparking.

The slope of the ladder shall not exceed

50

o the horizontal at the

extreme low position. Treads shall be self-leveling. The minimum

inside width of the ladder shall be 750 mm. If it is necessary for the

rails to be significantly elevated, then suitable steps shall be provided

down to the deck.

8B.12.2

The design shall ensure that the ladder will not be damaged or

derailed when exposed to the design wind velocity with the roof at its

highest operational level. The anti-derailment device shall be such

that there is no locking or permanent distortion.

88.1 2.3 The tilt ing effect of the loading from the rolling ladder and runway

shall be assessed and avoidance of the accumulation of rainwater at

local depressions shall be addressed for centredecks of pontoon

type roofs.

88.13 Anti-Rotation and Centerina Devices (C.3.12)

The type and configuration of anti-rotation and centering devices shall limit

lateral and rotational movement to the extent necessary to ensure that free

vertical movement and rim sealing are not compromised and that drain piping is

not unduly stressed. Roller type devices shall be provided with grease nipples.

88.14 Roof Sealing

The roof perimeter shall incorporate a flexible double sealing mechanism except

where

KOC

approves an alternative type. Irrespective of the type of seal,

details

of the proposed sealing mechanism shall be provided to

KO

for

approval. Details shall include data on the following:-

the suitability of non-metallic materials for the stored product and for

temperatures up to

80°C;

the fire-retardant properties of non-metallic materials;

foam application considerations;

the shell and roof (or rim gap) tolerances necessary to maintain the

seal;

operational constraints for inspection, maintenan,ce and component

replacement;



-

wh ethe r maintenance can be performed on secondary sealing w itho ut

affec t ing th e primary sealing;

-

self cleaning characteristics (eg. wax scraping);

means of electr ical insulat ion o f mechanical shoe hangers to ensure

th at no l ightning induced arcing can occur;

drainage of the seal sys tem for maintenance;

-

Corrosion resistance of metall ic sealing materials.

I r respect ive of the type of pr imary

/

secondary rim sealing, a weather shield

shall also be provided. This shal l be selected primari ly on i ts abi l ity to prote ct

th e ma in seals from du st, sand and paint ing operations rather than i ts rainwater

shedding capabi l ity

Bonding of th e roof and rol ling ladder to the shell shall be in accordance wit h

KOC-E-024.

88 . 1

Roof

S U D P O ~ ~

eqs

Roof supports shal l be designed to support the we ight of the roof

w i th adjacent f looded compartments and wi th 5 pounds per

square foo t uni form loading of the centre deck of pontoo n type roofs.

Pads of minimum 6 m m diameter shal l be provided to distr ibute

the support loads at the landing of the legs to the tank bot tom. The

pads shall be cont inuously welded to the tank b ot tom. Af te r l in ing of

th is p ad along w i th th e tank bot tom, an addit ional pad shall be

provided to avoid damage to the bot to m l in ing by the legs. This

second pad shall be slight ly smaller tha n the f i rst and shall be located

and l ight ly secured by an epoxy f i l let ro und i ts edges. C.3.10.2)

Drain holes at the bo ttom of support legs shall be ample to ensure

th at blockage b y sludge does n ot prevent th e legs from draining

completely w i t h the tank empt ied. C.3.10.1)

The upw ard project ion of support leg sleeves through the centre deck

shall be suf f ic ient to ensure tha t produ ct cannot f lo w onto the deck

under ei ther of the cond it ions described in

C 3 4 1

f API

650

Sleeves shall be adequately reinforced by means of topside pads and

gusse ts bu t shall also be welded t o the underside of the deck.

Supporting legs shall be adjustable so that, whatever is the grounding

height for operation, the height can be set to give 2 metres clearance

up to th e lowe st deck for maintenance. C.3.10.1)

T w o s lot ted st i ll wel ls of minimum 8 diameter sh all be provided for

man ual dipping and for level gauging. These shall be located close to

th e shel l so tha t they are operable from the gauger s p latform or the

wind girder accessway.



88 17 2 The stil l wells for manual dipping shall be provided with a hinged

brass cover to preclude the risk of sparking. semicircular top

reference plate notched 25 mm wide x

40

mm deep shall be welded

inside the manual still well.

88 17 3

The lower end of the still well pipes shall be restrained from lateral

movement

by

sleeves supported from the shell.

88 17 4

datum plate shall be provided below the manual still.wel1. This

shall be bare steel mounted level on the lined bottom and held in

place by resin.



DOC NO. KOC MV 007 of 73 REV 1

9 0 LOSS PREVENTION

This sect ion deals w i th potent ia l losses associated w i th tan ks used to store or process

liquids.

Where issues are not str ict ly wit hin the scope of this standard and ma y also

no t be wit hin the tank con structor s scope, then the relevant provisions are wri t te n as

recommendat ions.

9 1 Fire Protection

9.1 .1 Wa ter SoravlDeluqe

A f ixed water spray deluge system shal l be provided to cover the

exposed side(s) of ro ofs of f ixed ro of tanks as per the designated project

specif icat ion for Fire Protect ion Safety Equipment and NFPA-15 in the

fol lowing circumstances.

a) Wh en the tank is designed to contain crude or other low f lash

flammable l iquid.

b ) Other tanks whe re KOC has determined that the locat ion or

conte nt necessitates protec t ion from adjacent tanks or other

facil i t ies.

9.1.2 Fixed Foam installations

9.1.2.1 Fixed roof oi l ta nks require f ixed instal lat ions to apply a foam

blanket to the liquid surface. KOC may also require these

faci l it ies to be provided for other tan ks w hich are primari ly

designed to contain water bu t which normally have a layer of

f lammable l iquid having a volume of 1 0 m3 or more f loat ing on

th e surface. The foa m pourers shall be of the f langed typ e as

speci f ied on the data

sheet and shall be readily accessible for

maintenance.

9.1.2.2 Float ing roof tank s require faci l it ies for applying foam to the r im

space

and these shall also be fixed installations w he n specified

on the data sheet.

They shall be arranged to be compatible

w it h the selected roof seals.

9.1.2.3 In either of the above cases, fixed installation s shall be

according to NFPA-1 1 except that a minimum of

4

pourers shall

be required for tanks f rom 12 0 f t t o 1 4 0

t

in diameter.

9.1.3 Heat Detectors

F ixed roof tanks sha ll have fusib le l ink heat de tec tors i r ~ s r ~ ~ t..

indicated

on the Data Sheet . F loat ing roof tanks shal l have I~ i?a=r

ea t

dete ctors insta l led as indicated on the Data Sheet. Heat detectors

shal l com ply w i t h the designated project speci f icat ion for Fire Gas

Dete ct ion Equipment .



DOC NO. KOC MV 007 of 73

REV. 1

9 2 Ove r~ress ure rotection

9.2.1

Fixed roof open vented tanks shall be provided with weather shielded

open type breather vents. The vent shall not include flanges or any

other device which may introduce the possibility of inadvertent

obstruction. Vents shall be sized so that neither the design pressure nor

half the design vacuum may be exceeded at maximum tank breathing

rates.

9.2.2

Whether an essentially vapour tight roof is provided principally to limit

evaporation losses, or to allow recovery of tank vapour, or to retain an

inert gas blanket, such tanks shall be protected by pressure/vacuum

breather valves to limit the vapour space pressure within the design

pressure as established per paragraph 8A.

1

above.

9.2.3 Fixed roof pressurized tanks may additionally be protected by the

provision of a frangible roof to shell joint when required or agreed by

KOC. This feature may provide additional protection against preferential

failure of the shell to bot tom joint in circumstances such as:-

a liquid overfill

an internal explosion

an unexpectedly high degassing rate (where relie

not provide adequate discharge capacity),

or in the event of:-

failure of relief valves to operate

f valves might

However, wherever the risk of these events is judged to be acceptably

low, and the risk of failure by other mechanisms to be unacceptably

high, then KOC may prohibit frangible joints.

9.2.4

The venting of floating roof tanks is covered in Section 88 and none of

the provisions of this Section 9 apply.

9 3 Ventinq

Ca~acity

9.3.1 Normal Ventinq

Vent valves shall be sized for normal venting due to product

movement (including degassing and flashing) and for thermal effects in

accordance wi th API Std. 2000. Sizing shall also assume the coincident

failure of any vapour recovery compressor and of any control valve

designed for alternate vapour take-off or make-up under normal

operating conditions.

9.3.2 Emernencv Venting

9.3.2.1 Calculations shall be provided in accordance wi th API Std. 2000

for the emergency venting of

all fixed roof tanks intended to

contain flammable liquid. Environmental factor F shall be

t ken as 1.0 in all cases.



9 6 S ~ a r in q f PressureNacuum Protective evices

9.6.1

The number and ty pe of instal led devices shall satisfy the fol lowing

criteria:-

(a) Normal venting requirement

2

spare valves, (one spare t o be

blocked open

t o provide a safety m argin in the event o f a st icking

pal let and the other wi l l be also normally be blocked open but wi l l

be

a

maintenance spare.)

(b) Emergency venting requirement 1 spare valve which will be a

maintenance spare.

c) Flame arrested open vent requirement + safetylmaintenance

spare.

( d l Plain open or blanked ven ts d o no t require sparing.

9.6.2 The above sparing requirements shall be satisfied for both inbreathing

and outbreathing.

9.6.3

P IDv s shou ld indicate all protective valves or vents to be normally in

service. In addition,

a

note should be added to the effect th at only one

m ay be removed at a t ime for maintenance inspection when the tank is

in service.

9 7 Location and Installation of Protective evices

9.7.1

Pressure vacuu m valves shall be more or less equally spaced around the

tank per iphery except as ma y otherwise be approved by

KOC.

Butterfly

isolating valves shall be provide d and these shall have locking devices

fitted, and shall have clear indication of the position of the disk. Drip

accu mu lation trays and drain l ines shall be provided t o ground level for

fixed roof oil tanks.

9.7.2

Open vents shall be located near to the apex of the roof.

9 8 Overfill Protection

9.8.1

All tanks containing f lammable and / or combustible liquids should be

provided w it h a high level alarm located to avoid overf i ll .

9.8.1 I

In th e case of crude storage tanks, the alarms should satisfy

criterion (b) or (c) of NFPA

30

lause

2 10.1

f the tank w i l l not

be gauged at frequent intervals in accordance w it h criterion (a).

9.8.1.2 n

th e case of process tanks w hic h normally receive continuous

in flo w of flammab le and combu stible l iquids, the alarms should

normally satisfy criterion (b) of N FPA 30 lause 2 1 .1.



DOC.

NO

K O C M V 0 0 7

9.8.1.3 In the case of process tanks which receive only intermittent

inflow which is manually controlled, then the avoidance of

overflow may be achieved by application of either (a) or (b) of

NFPA 30 clause 2-10.1, irrespective of whether the inflowing

liquid is flammable and or combustible.

9 8 2

Fixed roof water tanks with inert gas blanketing shall be provided with

an overflow through a device designed to preclude discharge of blanket

gas or (if present) the oil layer.

9.8.3

Fixed roof water tanks without inert gas blanketing shall be provided

wit h a conventional liquid overflow. The downpipe shall be external to

the tank (except for the internal elbow tundish).

9 8 4

Calculations shall be provided to demonstrate that the required overflow

capacity will be achieved with the height of the overflow pipe(s) set at

an appropriate level below the design liquid level.

9 9

Boilover Prevention

The phenomenon of 'boilover' may occur when a large floating roof tank suffers

a full surface area fire and the heat wave travels down to reach the tank bottoms

where a significant quantity of water may be present. The resultant rapid boiling

action could eject large quantities of burning oil over the tank rim and into the

bund. To avoid this, a route should be provided to safely draw off the water

bottoms during such a fire to a location outside the bund.

9 10

Eva~oration oss Control

A

study of anticipated evaporative losses shall be performed for floating roof

tanks. This shall include losses from the rim seal and also around deck

penetrating fittings.

The study shall quantify the annual savings to be expected

from:-

a)

Selection of different roof types.

b

The installation of the different available rim seals and other loss control

devices.

The cost of procurement and installation of these devices shall be estimated on a

unit basis together with typical replacement intervals.

9 11

Protection Aqainst lqnition

The recommendations of API RP-2003 shall be implemented as far as practicable

in the design of tanks. Those operating recommendations that are contained in

this RP and which are pertinent to the actual design of the tank shall be writ ten

into the Technical, Operation Maintenance Manual.



DOC.

NO. KOC MV 007

of

73

REV.

1

10.0 FABRICATION 8 ERECTION

10.1

Health, Safety

8

Environment

During tan k fabrication and erection, all field activities shall adhere to KOC's

Fire and Sa fety Regulations and its Hea lth Safe ty Environment policies.

~ Fabrication Erection Procedure

A fabrication and erection procedure shall be subm itted for KOC 's approval and

shall describe the follow ing:-

Locatio ns for material receiving, cutting, shaping and pre-fabrication

operations.

Methods, techniques and equipment for cutting, shaping straightening

and marking.

Traceability and marking of m aterials and componen ts.

Pre-coating of material surfaces or edges.

Me thod (s) of positioning plates for w elding. 5.2.1.7)

Weather conditions under wh ich welding work may not proceed or

m ay only proceed under shielded conditions (described), or wi th

preheat. 5.2.1.2)

Dimensional control.

Erection sequence t o avoid built- in stresses and distortion 5.2.2)

and arrangements t o minimize cons truction loads and vulnerability to

buckling and other wi nd damage. (Win d girders and fixe d roo fs shall

be we lded at the earliest possible stage.)

Precautions t o be taken to maintain the slope of f ixed roof sheets

fro m the centre t o the shell and to prevent the development of f lat

areas or depressions.

Fabrication sequence to avoid distortion of floating roo f centre decks.

C.3.3.4)

10.3

Plate Suuareness

All shell plates shall be profiled t o a tolerance of k 2 m m in length and * 1

m m width . In addit ion, t o ensure tha t plates are truly rectangular, the

diagonals, measured across the rectangle formed by scr ibing lines 5 0 m m from

each edge, shal l not dif fer by more than 3 mm. 3.6.1.2) For lapped and

we lded r oof and bo tto m plates, no rmal mill tolerances are acceptable.

10.4 Cuttina , Forrnina Pre-fabrication

10.4.1

Plate material shall be straightened and or flattened by p

f y

r

rol l ing and this shall be done before the mater ial is pro ce s~ ~? r: r

way . 4.1.1.2)

10.4 .2 A ny proposals to extend the API-650 thickness l imitat ion of 0.375 up

t o w hic h plates for b uttweld ing ma y be cu t by shearing, shall be

submit ted for KO approval at th e tim e of tendering.

4.1.2)



DOC. NO. KOC-MV-007

I

ane

40

of

7

I

REV. 1

10.4 .3 When

the rat io of ta nk nominal diameter to shel l plate thickness is less

than

5000:l then the shel l plates shal l be rol led to the required

curvature. Addit ional pre-forming of plate ends to th e tank radius is

man datory for the fol lowing:- 14.1.3)

When the th ickness exceeds219mm or

-

Wh en the th ickness exceeds 1 0 mm and the diameter: th ickness

rat io is less than 10 00 : 1.

10.4.4 Manual gas cut t ing may be used for t r imming the corners of bot to m

plates whe re t w o lapped joints intersect and for cutt in g openings for

f i t t ings posit ioned on

site. Man ual gas cuttin g shall no t be othe rwise

ut i lized for con tainment par ts w i tho ut the approval of

KOC s

representative.

10.5 Ma rkinq an d Traceabi li ty

Al l plates and structural mem bers shall be marked for traceabi li ty in accordance

wi th the scheme out l ined in the Fabrication and Erection Procedure together

with any addit ional marks as may be required to faci l i tate si te erect ion.

Erect ion marks shall be painted clearly on plates and structural memb ers in

w h i t e

pain t and shall be at least 50 m m high. Heat numbers on each plate shal l

be

highl ighted to faci l i tate correlation w it h mi l l cert if icates and shall be located

on the outs ide of the completed tank e xcept for bo t tom plates.

10.6 Plate Preservat ion

10.6.1

Al l plate materials shall be shop primed for temporary protect ion during

shipment storage and construc t ion.

10.6.2 The

underside of tank bottom plates shal l be blasted and coated

according to System A 1 2 of KOC-P-001.

10.7 i n t e r ~ a s s le an in q

10.7.1 Al l completed welds shall be free from slag brushed and thoroughly

cleaned

before final inspection and subsequent painting / l ining.

Peening of we ld caps is prohibi ted.

10.7.2 The reverse side of double-welded

vert ical b ut t joints shall be back-

chipped ground or f lame gouged before the appl icat ion of the fi rst run

of welding to th is s ide and in a manner wh ich w i ll leave the exposed

surface

accessio le and sat is factory for the fus ion of the w eld m etal to

be added. Al l f lame-gouged surfaces mu st be dressed by grinding.

5.2.3.3)

10.8 We ld Proximi ty

10.8.1 Vert ical joints i n botto m shel l courses shall be at least 30 0 m m clear of

any annular plate joint.

10.8.2 Ver tical joints in adjacent shell courses shall in.general be offs et by at

least

3rd of

plate length but with

a

minimum of 500 where

make-up plates are used. 3.1.5.2)

--

.



DOC. NO. KOC MV 007 of 73 REV.

10.8.3 Vert ical and as far as pract icable, horizontal shel l seams shal l be

located t o clear all shel l connections and their reinforcing pads by the

minimum distances speci f ied in API-650. 3.7.3) n the event that

KOC agrees for horizontal seams only that it i s not practicable to

com ply w it h the above requirements, then penetrated, covered or

closely a pproached seams shall b e 1 0 0 % radiographed for at least

three t imes +he opening diameter or the length of the interference.

3.7.3.4)

10.8.4 Other shell at tachment welds shall clear these seams by 5 0 m m

exc ept whe re larger spacings are required by API-650 for the higher

material groups 3.8.1.2) Where it is impract ical to achieve these

spacings, the attachm ent should preferably be modif ied such that the

f i l le t we ld crosses the main seam by at least 50 m m and these welds

shal l be examined per para

1

1.2.2 of this Standard.

10.8 .5 Bu tt weld s joining compression r ings, top angles or win d girder

sect ions shal l be at least 1 5 0 m m a way f r om any shell ver t ical seam.

10.8.6 Rat-holesi ' shall be provided t o avoid con tact bet we en the radial

we lds o f st i f fening r ings and the shel l, and be twe en shell vert ical

seams and the r ings. The f i lle t welds that jo in the sect ions on to the

shell shall be deposi ted b y star t ing 5 0 m m from the rat -hole and

welding awa y f rom the rat-hole.

10.9.1 Requirements for preheating w i l l be established b y the welding

proced ure and tests. Howe ver, unless otherwis e agreed by KOC, the

fol low ing minim um requirements shal l apply:-

(a) Automat ical ly welded hor izontal seams may be welded wi tho ut

p rehea t up t o 3 8 m m th ick .

(b) Other plates over 2 5 m m and irrespect ive of locat ion shall be

preheated t o

1

OO°C m ini mu m.

( c )

Other shel l p la tes f rom 1 9 m m to 25 m m sha ll be preheated to

50°C minimum.

The above preheat requirements shall also apply t o attachm ent welds

and repairs to p late surfaces and shal l be based o n the thickness of the

shell or annu lar plate.

10 .9. 2 A n appropriate level of preheat shall also be appl ied wh en materials of

Group IV or h igher and 1 9 m m or th icker are f lame cut or arc-air

-

gouged.

10.10

Post

W eld

Heat

Treatment 3.7.4)

10.10.1 Hea t treatm ent procedures shall

be subject t o approval. These shall

include any temporary sup port or other provisions to avoid distort ion.



DOC. NO. KOC MV 007

o 7

REV

1

10.1 0.2 Clean ou t doo rs and any other assemb ly requiring stress rel ief shall be

furnace heat t reated

as per API

65 0. No local stress rel ief of these

assemblies is perm itted.

10.10.3 When s ide ent ry mixers wi l l or may be mounted on shel l manways,

then pos t weld heat t reatment o f the pre- fabricated man way assembly

shal l be mandatory.

3.7.4.3)

10.1 1 T e m ~ o r a r v

ttachments

10 .1 1.1 Holes in platework, to assist in erection, are not perm itted. Lugs, nuts,

c lamps, and other devices to assist in erection may b e attached to the

tank plates by welding, bu t all such attachments required only for the

purpose of erect ion shall u l t imately be removed and any not iceable

project ions of we ld metal remaining shall be careful ly ground or

ch ipped away.

10.1 1.2 Great care shall be exercised to avoid gouging or tearing of plates in

the process of removing attachments. 5.1.5) Howeve r when such

instance s do occur, remedial weldin g shall be restricted to areas whe re

th e dep th exceeds 1.5 mm . Shallower areas shall be careful ly

blended b y grinding only.

10.1 1.3 W hen required by KOC, repair welds shal l, on complet ion, be ground

smo oth (but not necessari ly f lush w i th the p la te) .

1Q.11 .4When it is proposed to use arc-air gouging on plates to remove

temp orary at tachments, the procedure to be used shall be subject to

approval by KOC The preheat requirements shall no t be less tha n

those speci fied in the procedure test for welding plates of equivalent

thickness b y the w elding m ethod and procedure under considerat ion.

10.12 Tank Isolation

After hydrostat ic tes t ing

of

the tank, it shall be sw ept c lean internally pr ior to

paint ing act iv i ties. Al l nozzles shall be blanked-off using temporary steel

blanks.

10.13

Coatinrr

&

Lining

10.13.1 The external and internal coat ing shall be in accordance w it h the Tank

Data Sheet and the referenced KOC-P-001 Appendix 3 systems. A

summary of surfaces requir ing coat ing

is also given in Table 8 9 in

Sect ion 8

10.13.2 Sur face

preparation shall include the rem oval of rem aining shop primer

as required by clause 1 0.6.1 of th is standard, exce pt where no internal

coat ing is required b y the Tank Data Sheet in wh ich case the shop

primer ma y b e lef t in place.

10.13 .3 Except for

the temporary shop pr imer, coat ing and l in ing is not

permi t ted pr ior

to hydrostat ic tes t ing of the tank. No pa in t or coating

shall be appl ied to we ld seams w hich are subject to leak test ing.



10.1 3.4.Bottom s shall have a thic k interna l lining in a ccordance w ith KOC-P-

0 0 2 Part 2. This lining shall extend up the shell as follows:-

i 0.5 m above the oil-water interface for Wet Crude Tanks

(including Test Tanks).

ii

0.5 m above the bottom for others.

10.13.5 Procedures for surface treatments and for the application, examination

and testing of coatings and linings shall be submitted for KOC's

approval together w ith product data.

10 14 Tank

alibration

10 .14 .1 Calibration is mandatory for tanks used for hyd rocarbon storage. The

liquid calibration method in accordance with API

2555

shall be used

unless otherwise agreed by KOC. Howe ver, calibration of the volume

below the minimum operating level of f loating roof tanks may

alternatively be calculated from linear measurements within the

guidelines contained in Appendix F of Section

2A

of the API Manual of

Petroleum M anagement Standard.

10.14.2Other oil tanks shall be calibrated when require'd by the Data Sheet.

Fixed roof Wet , Dry or Test tanks shall be taken as being for

operating control as defined in para l 3 ( a ) ( l ) of API 2550

The

metho d shall be at the Constructor's option within the

guidelines contained in Appendix F of Section 2A of the API Manual of

Petroleum Management Standard.

10 .14 .3 Calibration shall be performed and certified by an internationally

recognized specialized agency approved by KOC. Capacities shall be

tabulated for all oil tanks in millimeters and API (4 2 gallon) barrels.

Calibration data and tables shall be subject to KOC approval prior to

final issue.

10.14.4Water tanks whether with fixed or open roof need not be subject to

as-built calibration.

Their nominal capacity may be as calculated

from the design, and variations within the required dimensional



11.0

SITE INSPECTION TESTING

1 1 I General

1

1.1.1

lnspection shal l be performed by or on behalf of the constructor to an

extent necessary to ensure that all requirements of the Code, the

specification(s), the drawings and the inspection and test plans are

met.

1 1

I 2 KOC's inspection representatives shall have, at all times, free entry to

all work locations while work is in progress.

The constructor shall

afford reasonable facil it ies to ensure that the work is being carried out

in accordance w ith the requirements of this S tandard. 5.3.1

.I

11.1.3

The construc tor shall submit a Field lnspection Co-ordination

Procedure wh ich shall as a minim um deal wit h all the topics covered

in Appendix 8 f this Standard. Timely wr it ten activ i ty and

inspection notifications shall be provided to KOC's field inspection

representative as outlined in Appendix

8.

lnspection surveillance and

mo nitoring wi ll also be performed by KOC.

11.1.4

Mil l and shop mater ial test reports shal l be submitted to KOC for

approval prior to shop fabrication.

11.1.5

Shell plates shall be inspected by KOC at the tank fabricator's shop or

at site or both. (depending on the scope of any shop activities.)

11.1.6

Impact test results of plates after heat treatment ( if any) shall be

submitted to KOC for evaluation. Welding procedure qualification

records shall include such results.

11.1.7

The constructor shall inspect and keep stock of all materials and shall

also be fully responsible for their safekeeping and traceability. All

fittings, valves, plates, etc., shall be properly laid out on wooden

supp orts clear of the soil. Special care mus t be taken to ensure tha t

no damage or harmful sand or water ingress occurs.

11.1.8

All site welding shall be subjected to close visual inspection by

competent welding inspectors of the constructor as the work

progresses, and any faults or bad practices shall be corrected as soon

as possible. In particular, each pass of main shell seams shall be

examined after thorough cleaning for faults such as lack of fusion,

surface cracks, slag inclusions and unde rcutting. Special care shall be

tak en in the examination of double-bevel joints b efore welding the

second side.

Exam ination of fi l let welds shall not be confined t o the we ld itself. The

reverse side of fi l let welds on the shell and the floating roof

compartments and decks shall be examined for evidence of burn-

through. Such indications shall be repaired irrespective of the abil ity to

pass a leak test.



1

1 1 9

Assemblies wh ich will be stress relieved such as man ways , nozzles

and flush type clean-out f i tt ings shall be inspected by KOC at the tank

fabrica tor's shop prior to heat treatmen t.

11.2 Welded Joints

1 1.2.1 Tack Welds

Tack welds in shell to bo ttom welds shall be subject to visual

inspe ction p rior to comp leting th e jo int and any cracked tack welds

completely removed.

if tac k welds are to be incorporated into horizontal shell seams, these

shall be dressed to the general satisfac tion of KOC 's inspection

representative.

1 1.2.2 Fil let Welds

Fillet welds th at cross vertical or horizontal shell seams shall be 10 0

magnetic particle inspected.

Permanent fi llet welded attachme nts to the bo ttom shell course shall

be 1 0 0 magnetic particle examined irrespective of the material group

of the shell.

5.2.3.5)

1 1.2.3 Annular Rinas

Irrespective of whether radial joints in annular rings are single or double

welded , one spot radiograph shall be taken of each radial joint.

6.1.2.9)

Com pleted annular rings for tanks to contain hydrocarb ons and tanks

t o operate w ith gas blanke ting shall be ultrasonically examined for

laminations in a 150 mm wide band centered on the attachment

location of the shell. Any lam ination shall be cause for replacing that

segment of the ring.

1 1.2.4 Leak Testina of Bottom Joints

After welding of the bot to m plates has been completed, all welds shall

be leak tested b y using a vacuum box and soapsuds. The test shall be

mad e as soon as possible after welding of the bottom , removal of slag

and w ire brushing, but before any surface coating is applied. 5.3.4)

A partial vacuum of at least psi shall be applied. 5.3.3.4)

1 1.2.5 Shell t o Botto m Weld

The shell to botto m plate weld shall be we t m agnetic particle inspected

on th e inside and ou tside, after the first pass each side and after

hydrotest on the completed welds p rior to l ining.



DOC

NO. KOC MV 007 I

REV.

11 .3.2 A t horizontal and vertical shell seams the shell profile shall not deviate

from its design form by more tha n the fol lowing, measured over a

gauge length of 1m: 5.5.4)

-

1 0 mm for plates up to and including 13 m m thick.

8

m m for plates over 1 3 m m and up to and including

5

mm.

6 m m for plates over

25

mm. thick.

11.3 .3 The plumbness and roundness o f th e tan k shall be checked during

con structio n and in the eve nt of ma jor departures, the c onstructor shall

advise KOC of the situation and of the steps proposed to deal with it

11 .3.4 An y indication that the tank is settl ing unevenly during erection, such

as th e appearance of excessive gaps in the set up of circumferential

seams

or departure of the shell from the vertical shall prompt a

measurement of foundation settlement which shall be reported to

KOC.

In no circumstance s shall excessive force be applied to rectify such

dimensional deviations.

11.3 .5 The tank shell shall be carefully checked for circularity, dimensions and

level before the roof m embers (fix ed roof tank) are erected.

11.4 lnternals

11.4.1 Before installation in the tank, any gauging or dip tube shall be

inspected for straightness, freed om fr om internal o bstructions, e.g.

we lding burrs and drilling chips, and for correct positioning of all vent

holes along the leng th of th e pipe.

11 .4.2 W hen propeller mixers are installed, special attentio n shall be given to

their mounting. The m ixer man ufacturer's recommenda tion shall be

follow ed unless otherwise agreed in writ ing.

11.4 .3 Some form of leak test shall be applied to hollow section roof support

columns to ensure that product w il l no t rise up inside the column.

11.5 Floatina Roof C omaartments

Irrespective of any in-house pene trating oil tes ts performe d during fabrication,

each comp artmen t shail be subjected to a low pressure pneumatic leak test and

examined w it h a soapy water solution. (C.3.6)

1

1.6

Testina Procedure

11.6.1

or

hydrotesting,

brackish water shall be used in accordance w ith the

designated Project Specification covering this topic.

11 .6 .2 Procedures for h ydro static and leak testing shall be subm itted for

approval and shall address the follo win g topics as a minimum :-

(a)

Sequence of activities (including any anchorage checks)

(b)

Test level (and test pressure for fixed roofs)

(c)

Extent of any coating w hic h m ay be applied or left in place prior

to testing.



DOC.

NO.

KOC MV 007 Paae 48

of 73

REV. 1

11 7 Shel l est

Restraining effects of internals.

Test f luid and details of any chemical addit ions.

The min imum temperature for tes t water .

Fil ling rate (s) and holding t ime(s1.

Vent ing arrangements

+

means of ensur ing these are not

comprom ised dur ing f i l l ing or emptying)

Arrangements fo r emergency emptying.

Sett lement m easurement methods, locat ions and intervals.

Limiting sett lement criteria.

Leak detection methods.

Not i f icat ion to KOC of any leaks or deformations ident i f ied

during fil l ing.

Wa ter for hydrostat ic test ing shal l be at a temperature not lower than

1O°C. In exceptional circum stance s wh en test water temperature fal ls

be low this value, then f i ll ing shal l n ot proceed wit ho ut approval of

KOC. A ny such approval wi l l be based on an assessment of the risk of

br i t t le f racture.

The shel l o f f ixed roof tanks shall be tested after complet ion of the

roof and those of open top tanks af ter complet ion of the wind gi rder

and to p angle.

For the shel l test ing of a f loat ing roof tank, the weatherseal shall not

be installed. The test level shall be to a height such tha t the secondary

seal is just retained w ith in the shell. The design shall ensure tha t the

roof wi l l no t interfere w ith the gauger 's plat form or any other f i t t ing

wh en at th is tes t he ight .

To successful ly complete the test, th e tank shall stand for a per iod of

48

hours w ith no leaks.

In addi t ion

t o

a

foundation level survey prior to erection, level surveys

shal l be performed of the tank per iphery and bo tto m apex for

sett lem ent pr ior to f i ll ing for the hydrostat ic test and for the per iphery

at each of the ho ld po in ts l is ted in Table 11.7.5 be low. A t the ho ld

points , f i ll ing or em ptying should stop and the tank lef t standing for

the t ime indicated.

Measurements shal l be taken at th e beginning and

the end of the standing per iods.

Al l levels and sett lem ents shall be

measured w it h opt ical survey apparatus and the f inal record submit ted

fo r KOC rev iew approval. All measu rements shall be recorded and

plo tte d as i l lustrated in Fig.8-3 of API

653

Limiting sett lement criteria

shal l no t exceed the fol lowing (using th e def ini tions of 8.2.2 of API

653 :-

Uni form Set t lement

15 mm . (how ever f il ling shal l be stopped and KOC not i f ied i f uni form

sett lem ent reaches

5 0

mm.)



DOC. NO. KOC MV 007 I

of 73

REV.

1

Planar Tilt

Max of 1:400 for Oil Tanks or 1:250 for Water Tanks. Filling shall be

stopped and

KO

notified if t becomes evident that the limit would be

exceeded by proceeding further.

Out-of-Plane (Differential) Settlement

One half of the limit calculated by the formula in 8.3.2 of API 653.

Filling shall be stopped and KOC notified if t becomes evident that the

limit would be exceeded by proceeding further.

When any of the above criteria are exceeded, any remedial or

concessionary proposal shall be subject to KOC approval.

Table 11.7.5 : Hydrotest 'Hold Points

Operation evel Holdincr Time

Filling: Empty

25% full 24 hours

50% full

24 hours

75% full

24 hours

100% full

48 hours

Emptying: 50% 24 hours

11.8 Floatina Roof Test

11.8.1

The hydrostatic test of floating roof tanks shall include examinations

for water leaks inside pontoon and double deck compartments and

through the single deck. The examination for roof leaks may be

conducted at any convenient flotation level but not when it is wet or

raining. Roof drains shall have been pre-tested to 50 psig prior to filling

the tank and a further check shall be made for leaks from external

pressure when the roof is floating at its highest level. (C.4.3, C.4.5)

11 8.2 During filling and emptying of the tank, the roof shall be monitored for

even flotation. At half-full and full, the shell shall be checked for

circularity and measurements recorded.

11 9 Fixed Roof Test

11.9.1 All fixed roof tanks which are not open vented shall be deemed to

require gas-tightness and shall be subject to leak testing. (5.3.7.1,

F.7.6)

11.9.2 Pressurizing of the space under the fixed roof may not proceed until

the shell hydrostatic test has stood for the specified time with no

evidence of leakage.

11.9.3 manometer shall be set up for a roof pressure test such that any

significant overpressure will blow out the water. The bore of the

manometer shall be sufficient to release air from the tank at a rate

which will avoid a build up from the pressurizing source.



pressure. The pressurizing source shall be disco nne cted imm ediately

on completion of the test and the pressure shal l be released and the

space suitably vented without delay.

11 10 Coils

Heating coils or other heating devices containing fluid pressure shall be tested

hydrostatical ly whi le the tank is empty to a pressure o f

1.5 x

working pressure,

bu t no t less than 7 barg.

1 1

Internal Exam ination

Prior to internal l ining, the bottom apex and, if applicable the bottom outlet

connection, shall be checked for settlement relative to the shell and the

mea sureme nts recorded. Displacement of the bo tto m apex shall not increase or

decrease the bo tto m slope by more than 50 .

A

detailed survey of settlement of the bottom plates is not required, but any

area of pronounced depression or bulging shall be mapped and assessed against

the criterion in clause 8.3.3 of API 653 . The maxim um allowable depression or

bulge shall be two-th irds of t hat der ived from th e formula.



12.1 General

12.1.1 Com prehensive NDE procedures shall be sub mitte d for approval by all

NDE

contractors together with detailed technique sheets.

12.1.2 Interp retation of non-destructive examinations shall be made by or on

behalf of the constructor by ASNT SNT-TC-1A Level

II

or Ill personnel

or agreed equivalent.

1

2.2

Vo lum etric Exa mination General Requirements

12.2.1 Vo lum etric examination shall be by radiography except for lamination

checks or as otherwise agreed by KOC.

12.2.2

X

radiography shall be used unless prior approval has been obtained for

the use of the isotope Iridium 192. 6.1.3.1)

12.2 .3 Radiographic examination shall be made as the w ork progresses.

Wh ere shell seams require 10 0 exam ination this shall be delayed at

least 2 4 hours. Otherwise, radiography shall be performed as soon as

practicable to give an early indication of problems with equipment or

consumables. Mark up of the radiographic location record shall also be

done progressively. 6.1.8.1)

12.2 .4 Locations for th e spot radiography of vertical seams and intersections

may be selected

y

the constructor if KOC's inspection representative

is satisfied that welders are not aware of selected locations in

advance. 6.1.2.2)

12.2 .5 Locations for spot radiography of horizontal seams and for random

radiography of vertical seams shall be selected by KOC's inspection

representative. 6.7.2.3)

12.2 .6 Iden tification markers shall appear on the films as radiographic images.

12.2.7 W hen additional radiography adjacent to a defe ctive area of a spot or

randomly radiographed vertical seam reveals further unacceptable

defects, then tha t vertical seam shall be subject t o 1 00 radiographic

examination. 6.1.6)

12.2.8 KOC shall be afforded the right to have further additional ex m ina tio ns

performed. When the addit ional examinations required by K O ' w e a l

no defects which require repair ing then the cost of these e x a v i ~ :

- - s

ma y be charged to KOC.

12.3 lmaqe Q ualitv Indicators

Radiographic sensitivity shall be controlled by utilizing test method ASTM

E-

747 and image quality indicators or penetrameters conforming to that standard

or to BS 3971

or EN 46 2-1 . However the required visible wire shall be as per

Table 12.3 for th listed nominal material thicknesses . No additional thickness

shall be allowed for we ld reinforcement or for b acking strips.



DOC. NO.

KOC-MV-007

of 73

REV.

1

Table 12.3 Radiographic Sensitivity

Nominal Thickness Wire

NO

Wire

No.

Wire Diameter

BS

3971 EN

462-1

ASTM-E747

under

7

mm 8

14 0.006 (0.16 m m )

up to

8

mm

9

13 0.008 (0.20

m m )

up to 14 mrn

10 12 0.010 (0.25

m m )

ua

to 19

11 11

0.012 (0.32 m m )

Film Densitv:

The density through the weld metal shal l not be less than

2.0

and not more

than

3.2.

The density in parent metal adjacent to the weld shal l not exceed

4.0.

Film den sity shall be assessed using a su itably ca librated densitorneter.

Film

T V D ~

The ty pe of f i lm shall be at least medium speed (e.g. Kodak AX, Gevae rt

D 7

or

equ ivalen t). Intens ifying salt screens shall no t be used.

KO Acceptance

12.6.1

Exposure conditions shall be attested

in

the report by the organisat ion

responsible for shooting the radiographs. Af ter interpre tation and

checking

by

an ASNT level I or

Ill

qualified operator, all radiographs

complete with reports shal l be subject to KOC's review and

acceptance. Suitable viewing facil i t ies shall be provided and a

calibrated densitometer shall be made available.

12.6.2 When two or more types of weld defects are present in the same

radiograph whose extent equals the maximum acceptable l imit for

both , th e we ld shall be judged unacceptable.

Retention

o f

Radiociraohs

After completion and acceptance of a tank, the radiographic fi lms including

those showing defects to be repaired, shall be handed over to KOC suitably

sorted, box ed and indexed, and become the sole prope rty of KOC.

6.1.8.2)

Surface Examination

Surface examination shal l be by the wet magnetic part icle technique using

electromagnets except where other methods are agreed by KOC to be more

suitable fo r particular applications.



13.0

WELDING PROCEDURES QU LIFIC TIONS

13.1 eneral

13.1.1 W elding procedures and qualifications shall be in accordance w ith

Se ction IX of the ASM E Boiler and Pressure Vessel Code and any

Project S pecification for G eneral We lding Requ irements. 7.2.1.2)

13.1.2 W eld procedures shall be subm itted for approval together w ith

sup pon ing procedure qualification records and we ld key plans wh ich

shall indicate the procedures t o be applied for all welds or groups of

we lds i n the tank, including tempo rary we lds and repairs.

13.2 Weld Procedures

13.2.1

Lo w hydrogen electrodes shall be used for welding the shell to bo ttom

joint, for all steels w ith a specified minimu m tensile strength in excess

of 60,000 psi and for th e repair of surface defects. 2.2.6.2, 2.8.1)

13 .2.2 Al l shell ve rtical joints shall be welded by shielded metal arc welding

(S.M .A.W .) w ith uphill progression or, wh en specifically approved by

KOC, by automatic electro-gas welding (EGW). 5.2.1 . l )

13.2.3

Ho rizonta l shell joints shall be welded u tilizing either shielded me tal arc

welding (SM AW ) or automatic submerged arc welding (SA W ).

5.2.1.1)

13.2.4 When

t

is proposed to use a weldab le prote ctive coating on edges

prepared for welding, technical data on the coating shall be appended

to th e applicable weld procedures subm itted for approval. 5.2.1.9,

7.2.1.4)

13.2 .5 Primers applied principally to prote ct plate surfaces shall not be

considered weldab le and shall be locally rem oved by grinding or

brushing prior to th e w elding of attachments etc.

13.3

Qualification

Testina of Weld Procedures

13.3.1 The procedure q ualification tes t for submerged arc welding (SA W ) of

shell horizontal seams shall be executed in a tes t frame on plates w ith

a minim um length of 3 m etres under restrained conditions.

Procedure qualification for shell vertical seams shall be performed

vertically (3G) and shall be subject to impact testing of the weld m etal

of SM AW welds and weld me tal and heat affected zone of EGW

welds. Qua lifications for EGW shall be run on specimens of the full tier

height for

both the maximum and minimum shell thicknesses. Impact

testing of other procedures for thicknesses 38 m m and under

shall no t be required irrespective of any requirement for im pac t testing

of the plate

7.2.2.1)



DOC. NO. KOC MV 007

Pane 54

of 73

REV.

1

13.3.3 Procedure qualif ication for shell t o bo tto m joints shall be performed on

th e actua l joint configuration material grades and thicknesses to be

used. This procedure qualif ication tes t shall demonstrate that the

hardness of the heat affecte d zone at the shell t o bo tto m plate does

no t exceed

280

H

13 3 4

Hardness testing of procedure qualif ications shall be mandqtory for

Gro up IV and higher materials as outlined in para. 3.3.4a of API-650.

Hardness testing of EGW procedures shall also be mandatary

irrespective of the shell material group. Welds and heat affecte d zones

shall be surveyed. The maxim um allowable hardness shall be 280 Hi .

13 4

Welder Qualification

Welders shall be qualif ied in accordance w it h ASME Section IX and Appendix B

of this Standard.

7.3.2)



14.1 Cert i fy ina Let ter

14.1.1

A separate cer t i fy ing let ter shall be provided by the constructor to

cer t i fy tha t each tank has been constructed in accordance wi th the

requi rements of API 650, this standard and the data sheet. 8.3)

14.1 .2 When

t

is agreed tha t al l pert inent requirements have been met, KOC

shal l issue a let ter of acceptance whic h ma y be subject t o subsequent

sat isfactory compilat ion of the cert i f icat ion dossier or t o any other

condit ion . In the case of f loat ing roof tanks, acceptance wi l l be

condi t ional o n sat is factory leak- free f lotat ion on crude oi l when the

roof is less buoyant than o n test water .

14.2 M ark ing

14.2.1

Th e tan k shal l be identi f ied b y an austenit ic stainless steel nameplate

welded t o a bracket above one of the manw ays. The nameplate may

not be aff ixed unt i l KOC's acceptance letter has been received.

8.1.2)

14.2.2 Th e tan k identi f icat ion number shall also be painted onto each tan k

w it h a re-coatable urethane finish. Characters shall be painted in black

and be a minimum of 6 0 0 m m high. Identi f icat ions shall be painted at

t w o diametr ical ly opposite posit ions.

14.3

Safety Precautions

The constru ctor shall no t under any c i rcumstances remove spades f rom product

or process connections, or introduce product into the tank b y any other means

wi t ho ut pr ior the wr i t te n authorization of KOC whic h w i l l no t be issued before

the nameplate has been af fixed.

14.4

Cert i f icat ion Dossiers

Individual dossiers should be compiled for each tank. Dup l icat ion of docum ents

wi th in a dossier should be avoided.

Th e con ten t of a dossier shall be as follows:-

Mas ter and volume index.

Cert i f icate of Conform ity to the appl icable constru ct ion code together

w i t h as-buil t data sheet .

Concessions.

Cross reference t o vendor cert i f icat ion dossiers containing i tem

cert i f icat ion fo r appurtenances etc.

Material cert i f icates cross referenced to locat ion records.

Material repair records.

We ld key plan(s)

WPS's PQR's.

Summ ary sheet of qual i f ications of ut i l ized welders.



Produ ction we ld records t o include WPS and welder traceabi li ty and

cross references t o NDE reports and heat treatm ent records i f

applicable.

NDE reports records.

Heat treatment chartslrecords.

Dimensional records

Hyd rosta t ic and leak test reports.

Pre-erection foundation level survey record.

Sett lemen t records.

Surface preparat ion and coating appl ication records and examination

reports.

Al l design calculat ions.

Cert i f ied ta nk cal ibrat ion record.

Arrangement drawing.

Nam eplate facsimi le.

14 5

Technical , O ~e ra t in c l nd Maintenance Manuals

14 .5.1 Tech nical and Maintenance data may be consol idated for each tank or

each group of tanks.

The con tent shal l be as fol lows:-

a) Dra wing l ists.

b) Dra win gs including, tank construc tion, civi l, piping, electrical,

hazardous area dass ification , cathod ic protection, process

instrumen t, f iref ight ing and safety equipment, tank f i t t ings, etc.)

c)

Safe workin g loads for roofs, platforms, etc.

d l Maintenance intervals and procedures.

e l Tes t and calibration recom men dations for electrical installation,

cathod ic protect ion, instruments, controls and safety devices.

f) Spares l istslrecom men dations.

g) Lubricat ion schedulelrequirements.

h) Mix er performance data.

14.5.2

The Operat ing Manual may be integrated w ith data for the operating

centre as a whole or for the tankage area, as appropriate.

The c onte nt shal l be as fol lows:-

a) Start-up checks, precautions, sequence and parameters.

b) Sh ut-do wn checks, precautions and sequence.

(c) Lim its o f opera ting parameters pressures, temperatures, f lo w

rates, f luid compositions).

d) Mix ing recommendations.

15 0 SP RE P RTS ND M INTEN NCE

For all relevant requirements refer to

KOC G 009.



APPENDIX A FIELD INSPECTION CO -ORDINATION

For the purposes of this document, f ield shall refer to any locat ion wi thi n the borders

of Ku wa it at w hi ch tank pre-fabrication, construction, erect ion or test ing are

performed.

A.2 Forms

The Field lns pe ctio n Co-ordination Procedure as required by paragraph

1

1 1 3 of this

Standard shall ide nt i fy al l the forms whic h wi l l be ut i lized to con trol and record

inspect ion act ivi t ies and tests. Sample forms shall be appended. Outl ine indexes of

the content of inspection records and dossiers shall also be appended.

A.3 Desiqn Docume nts

The Field lnspe ct ion Co-ordination Procedure shall describe h o w the constructor wi l l

ensure tha t checks and inspections are performed against the correct issue of

drawings etc. The mean s by wh ich such docum ents wi l l be cert i f ied as-bui lt shall

also be described.

A.4 Punchlisting

Co-ordination asp ects o f pun chlisting shall be described. The Field lnspection Co-

ordination Procedure shall also provide for a

periodic report to be issued giving the

subject ma tter and close-out status of each punchl ist.

A.5 Communicat ions

The Field lnsp ect ion Co-ordinat ion Procedure shall address h o w form al comm unicat ions

from KOC's f ield inspect ion representat ive wi l l be dealt with. W hen the constructor is

unable to tak e immed iate a ct ion or to provide an immed iate response, the

comm unicat ion should nevertheless be formal ly and promp tly acknow ledged and an

indicat ion given of h o w th e issue is being handled and the ant icipated t imescale.

A.6

lnspect ion and Test E q u i~ m e n t nd Personnel

A.6.1

The constructor or his sub-contractors shall be responsible for making available

all th e e quipme nt and means of cal ibrat ion in suff ic ient qu anti t ies for the

performanc e of the tests and inspect ions required by the applicable codes and

speci f icat ions. When

t has been agreed to

make specific KOC facil i t ies

available, th is shall be indicated in the procedure.

A.6 2

NDE operator and interpreter qualif ications shall be mad e available t o KOC on

demand.

A.7 Ac t iv i tv Not i f icat ion

KOC's inspect ion representative shall be advised on a daily basis the intended

comm encem ent of qua l i ty related act ivit ies and their locat ion. This is bo th to faci l i tate

implemen tat ion o f inspe ct ion surveil lance, and to a l low for inspect ions to b e performed

on a f i rst- off basis to ,establish contacts, veri fy competence, veri fy adequacy of

tools and equipme nt and to ensure that requirements are properly understood.



DOC. NO KOC MV 007

Examp les of su ch first-o ff inspe ctions are cutting , roll ing,: bending, pre-heating,

welding, joint lapping, PWHT, tes t equipme nt calibration, blasting, and coa ting

appl icat ion and test ing .

A 8

Inspection Not i f icat ion

KOC's inspect ion representative shal l be provided w ~ t hormal individual not if icat ions

for inspect ions as below:-

Ide nti fy and inspect materials of construct ion.

Structu ral checks on foundations.

Check of foundation levels, orientations and slopes.

Sub-assemblies prior to any PWHT.

Fit-up o f annular ring joints.

Fit-up o f shell vertica l and ho rizontal joints.

Fi t -up of shel l to bo t tom jo int

/

Shel l roundness and circumferenc e at

1

ft. elevation.

Fi t -up of f loat ing roo f centre deck to pontoons.

Selection of locations for spot radiography (horiz. seams) and random

radiography (ve rt. seams).

Leak test ing of bo t tom jo ints.

Ma rke d nozzle locat ions prior to cutt ing.

Fit-up o f nozzles to shell .

Fi t-up and elevat ion of win d girders.

Air te st ing o f reinforcing plates.

Peaking and banding checks of each shell course.

Magnetic Particle and Ultrasonic Examinations.

Leak t ightness o f roo f su pport column s ( i f required.)

Checks of shell and st i l lwel l plumbness and datum p late level.

Leak test ing and overal l dimensions of f loat ing roof.

Level check of to p angle pr ior to erect ion of roof or framing.

Flatness and con dit ion of f lange faces of large openings prior to closure

for tes t .

Tes t ing o f f loat ing roof drains.

Hyd rostat ic test, sett lement measurement and volumetr ic cal ibration.

Leak testin g of roof joints (if required.)

Internal pre-commissioning examination.

Pre-commissioning tests of pressure and vacuum relieving devices.

Checks on pressure and vacuum rel ieving devices and other f i t t ings after

mount ing.

Instrument and electrical checks and calibrations.

A 9 l n s ~ e c t i o n T e s t R ec ord s

NDE reports shal l be cop ied to KOC's f ield inspec t ion representative after endc:<=.- .

b y al l relevant part ies.

A 10 R e ~ a i r s ,Non-Con formities, De viations etc.

A . 10.1 All non-conform ance reports shall be copied to KOC's f ield inspection

representative,

whether these are ini t iated by the con structo r or by a sub-

contractor .



A 1 0 2 KOC s field inspection representative shall b e no tified of any proposals to

dev iate fr om established specifications and procedures wh en

t

becomes clear

th at a requirement is impractical or cannot be met w itho ut an adverse effect.

A 10 3 Prior wr i t t en noti f ication shall be given to KOC s f ield inspection

representative of any intention t o repair defects in mater ials together w it h

applicable procedures.

A 1 0 4

Prior wr i t t en noti f ication shall be given to KO C s f ield inspection

representative of any intention to f i l l a tank for te sting or calibration purposes.

This shall be supported b y documentary evidence of the sta tus of fabrication,

inspection and

NDE.



DOC. NO. KOC M V 007 Page 6 0 of 7 3 REV.

APPENDIX : ESTABLISHMENT AND MAINTENANCE

OF

WELDER QUALIFICATIONS

B.

Qualification Testing

Weld ers shal l be subject t o test ing under surveil lance of KOC s inspect ion or

wel ding representat ive i r respect ive of any p revious qual i f icat ion perform ed

outs ide Kuwai t .

Employers s hould o perate a programme of regular med ical examinat ion of

welders.

Weld ers shal l be assigned an ident if icat ion code pr ior to u ndertak ing any tests.

A unique tes t number shall be a llocated t o each tes t and s tamped on the

spec imen. A l l te s t documentat ion shal l re ference th is tes t number .

Th e ident i ty, grade and thickness of parent test mater ial shal l be posi t ively

establ ished an d recorded.

Welder per formance tes t ing shall be carr ied out s t r ic t ly in accordance wi th a

sui tably qua l i f ied w eld procedure speci f icat ion

(WPS).

The tes t ma y be te rm ina ted a t the we lder s op t ion if he becomes aware tha t

he h as introdu ced a defect, and m ay b e restarted after re-preparation or

rep lacement o f the tes t specimen. Only one such welder s opt ional res tar t

ma y be a l lowed except for in tended restar ts for ne w e lect rodes or re-

posi t ioning. O n comp let ion of the test weld, no repairs shal l be al lowed i f for

exam ple a def ect is revealed by cosm etic gr inding or fi ling.

The tes t m ay be te rm ina ted by the emp loyer o r by KOC whenever

t

becomes

apparent tha t the welder lacks the requi red sk i ll to produce sat is fac tory resu lts

or i f he fa ils t o observe the requirements o f th e

WPS

In the event o f a tes t fa ilure , KOC reserves the r ight to d isa l low an immediate

re-test and t o insist on a per iod of further t raining before any re-test.

Qual i f ica t ion tes ts us ing

SAW

or

EGW

processes shal l in addi t ion to

radiographic exam inat ion be subject t o ei ther ul trasonic examinat ion or bend

test ing.

B.2 Qual i f icat ion on roduction Welds

In cer ta in c ircumstances, welders ma y be quali f ied by product ion weld ing. Th is fac i l i ty

wi l l be l imi ted t o automat ic and semi-automatic processes and wi l l on ly be a l lowed

w h e r e b o t h s id es o f t h e w e l d will be accessible t o c lose visual examinat ion. In the

event of a fai lure,

repair by a qual i f ied welder t o a sui tably qual i f ied and approved

repair

WPS

m ay b e al lowed a t KOC s discret ion.



8.3

Quali f icat ion Te st Records

The employer ma y use his o w n form to record the qual if icat ion test of a welder so

long as all essential tes t variables are recorded and the e xte nt of qu alif ication is clearly

indicated.

8 4 ldent i tv Cards

On sat isfac tory com plet ion and recording of welders tests, a card shall be issued to

each welder con taining the fol low ing information as a minimum:-

(a)

Photograph o f the welder (no t facsimi le)

(b) Welder s name.

( c )

Welder s ident i ty code

(d l

Brief details of qualif ied processes, positions, thicknesses, diameters and

consum able codes.

(e) KOC approval stamp, signature and date.

Cards w it h at least the welder s photograph, name and identi f icat ion number shall be

presented at the t im e of tes t ing as a means of posit ive identi ficat ion.

The welder shal l carry his card at all t imes w he n welding w ork is being performed.

B 5 Records

KOC shal l be prov ided w it h copies of qual i f icat ion test records, identi ty cards and

summ ary sheets of welders emp loyed on a project. Summary sheets shal l indicate the

star t and f in ish dates of each welder . No welder wh o actually work ed on the tank

con struct ion shal l be deleted from the sheet on his departure since this sheet wi l l be

required to be included in f inal records.

B 6 Maintenance of Qual i f icat ions throuqh Production Welding

0.6.1

The con structo r shall maintain product ion performance records for welders,

upd ated on a mo nth ly basis. Product ion and repair rates shal l be recorded on a

past mo nth and project overal l basis. Welders removed fro m the project for

any rea son shall be so indicated.

B.6.2 Th e reasons for significantly high repair or rejection rates shall be inves tigated

and appropriate correct ive act ion taken. These act ions ma y include any of the

fol lowing:-

(a) Dismissal of the welder.

(b) Downg rading to non-cr it ica l work.

c)

Wit hd raw al of qual i f icat ion for a part icular weldin g process or

posit ion.

(dl Retraining.

4

Recti f icat ion o f defect ive w elding equipment.

( f Au dit o f Consumable Controls.

8 6 3

Whe re signif icant ly high reject ion rates are attr ibutable t o supervisor

deficiency, correct ive act ion should be implemented in respect of the

supervision.



8 6 4

Failure t o observe the requirements of a WPS

n

production m ay be cause for

dismissal irrespective of the quality of welding as determined by visual or

other non destructive examination

B 6 5

A record of corrective actions shall be maintained

8 6 6

KOC reserves the r ight t o insist on the implementation of corrective actions in

t he event th at th e employer fails to take the steps

t

judges to be necessary



DOC. NO. KOC-MV-007 Page

6 of

73

REV. 1

KU WA R OIL COMPANY

STANDAR D FOR FIELD ERECTED STORAGE TANKS KOC-MV-007 APPENDIX C 1

FIXED ROOF OR UNROOFED TANK

DAT A SHEET API STANDA RD 650

TAG NO

SHEET

1

OF 4

Contncto r

V

Contractor

if

not cornoleted bv Purchaser

_

At .

A3.

A4.

AS.

A6.

A t .

A8.

A9.

AIO.

A l l .

A1 2.

A13.

A14.

AIS.

A16.

A l l .

A18.

PART A

:

GENERA L INFORMATION

C i a COUNTRY POST CODE FAX

RECTION SITE:

NOMINAL (RATED )CAPACITY

API BARR ELS (42 Gallon)

APACITY CALIBRATION REQUIRED

C]

YES

C]

NO refer to clause 10.14 o f KOC-MV-007)

V

PUMPING RATES: IN API BARRELSMOUR OUT APl BARRELSMOUR

DESIGN VAPOUR EVOLUTION RATE :NORMAL WM R

V MAXIMUM OPERATING TEMPER ANR E

RODU CT STORED PRODU CT SPECIFIC GRAVITY AT 'C

USCEPTIBLE TO PYROPH ORIC SCALING YES

C]

NO

if yes then l n m J n welding I nqulnd . Including roof plating)

DESIGN MINIMUM METAL TEMPERATURE (SHELL)

+ l o

V

DESIGN MAXIMUM TEMPERATURE SHELL INTERNAL 930C ROOF EXTERNAL

ORROSION ALLOWAN CE: SHELL MM ROOF 1.6 MM

ANNULA R RING 3 MM ROOF SUPPORT STRUCTURE MM

INTERNALS

V OPERATING PRESSURE RANGE

INCHES WG

DESIGN PRESSURE: INCHES WG DESIGN VACUUM 1 INCH

OTHER

ROOF DESIGN: FIXED CONICAL

ONE (UNROOFED)

V

FRANGIBLE ROOF JOINT:

1YES NO WA

UNIFORM LIVE LOAD

25 POUNDS PER SQUARE FOOT

C]

N/A

SPECIAL LOADS (PROVIDE SKETCH

GASES IN THE VAPOUR SPAC E

EARTHQUAKE DESIGN YES O N 0 ZONE IMPORTANCE FACTOR I

v s m

COEFFICIEHT

WIND LOADING: VELOCITY 100 MILES PER HOUR

SNOW ACCUMULATION NONE

SU E RESTRICTIONS: MAX. DIAMETER Metres)

MAX.

HEIGHT Metres)

OUNDATION TYPE

(Refer ta KOC-C-026)

MAXIMUM ALLOWABLE PERIPHERAL SEITLEMENT

:

UNIFORM

Dudng

Car.tructlon T n t )

TILT

OUT-OFPLANE

ROOF MAIN ACCESS: SPIRAL STAIRWAY

C]

RADIAL STAIRWAY

REMARKS:



DOC. NO. KOC -MV-00 7

.

REV. 1

KUWAIT OIL COMPANY

STA NDA RD FOR FIELD ERECTED STORAGE TANKS

:

KOC-MV-007 APPENDIX C1

FIXED ROOF OR UNROOFED TANK

DAT A SHEET API STANDA RD

650

TAG NO

SHEET 3 OF

lnfomution

to

comp tod by

Contnctor

V

Contactor if not completed by Purchaser

PART B CONSTRUCTION DETAILS corrtd

BIB.

817.

518.

B19.

BZO.

021.

822.

BZ3.

824.

BZ5.

VSUPPLEMENTARYNDE

V

LEAK TESTING: BOTTOM: VACUUM BOX

ROOF: AIR @ INCH WG

COLUMNS:

CALCULATED VENTING CA PA Cll Y REQUIREMENTS (STATE UNITS)

NORMAL INBREATHING

NORMAL OUTBREATHING (incl. Control V N Fai lun)

EMERGENCY PRESSURE RELIEF ( F i n E x p o r u n of Tank)

(Fim Exposure of Degassing Boot)

TOTAL EMERGENCY

PRESSURE ACUUM V A L M SET POINTS INCH WG PRESSURE INCH WG VACUUM

CAPACrrY OF VENllN G D M C E S AT DESIGN CONDITION (PER

UNIT :

PRESSURE VACUUM

rwn

M.nut.cbmfs

d t

and

Including

ma

M t

1

f l a m

uruton

or

other

flow

ruMctions

NUMBER

SIZ

OF INSTALLED VENTING D M C E S

P N V A L M S

VENTS

OVERFLOW CAPACITY (Volumetric)

V NUMBER, SIZE MODEL OF FOAM POURERS

DRAW ING NO:

M

TANK SUE: DIAMETER MM SHELL HEIGHT MM

MAXIMUM SAFE OPERATING LEVEL MM

V

DATE OF API STANDARD 650 EDITION EVlSlON

REMARKS

1.

All entries made after the first issue shall have triangular revision marks to identify the organisation responsible for the

entiy and the date.

2.

The Contractor shall submit this data sheet, completed as far as practicable, for approval in principle before proceeding

with preparation of detail drawings.



DOC. NO. KOC -MV-007

KUWAIT OIL COMPANY

STANDARD FOR FIELD ERECTED STORAGE TANKS

:

KOC-MV-007

:

APPENDIX C1

FIXED ROOF OR UNROOFED TANK (API STANDARD 650)

CONNECTIONS DATA

TAG NO

SH T OF

(DATA NOT

WTERED BY KUWAIT OIL

COMPANY S W

E

COMPLETED

BY THE

CONTRACTOR

Shell

.

Bottom

Cleanout Door

36 x 48

Bottom Flush

Shell Manway

24

.,

Shell Manwav as Mixer Mounttna

Maln lnlet

Man Liquid Outlet

Sklmmed

011

utlet

nn n

I

instruments

I

I

1

Nitrogen Purge

Corrosion Probe

Foam Pourer

Overtlow

I I

Fixed

Roof

@

Radius

I

2

D om pi pe

external to

the tank

Gas Dome

Vapour Outlet

Roof Manway

I

1 24

Open Vent I

Vapour Balance I 1 I

I

Gauge Hatch

Blanked Vent

I

I

I

PressureNacuum Vent

I

Blanket Gas lnlet

Blanket Gas Outlet

Anode Suspension

Referena Electrode Suspension



KUWAIT OIL COMPANY

STANDARD FOR FIELD ERECTED STORAGE TANKS KOC-MV-007 APPENDIX

C2

EXTERNAL FLOATING ROOF STORAGE TANK

DATA SHEET API STANDARD 650)

TAG NO.

SHEET 1 OF 4

Infamation

to

b

ompbted

by

urchaser

a

Contactor

PART A GENERAL INFORMATION

A l .

A2.

A3.

~i

AS.

A6.

A?.

A8.

A9.

AlO.

A l l .

A12.

A13

A14.

A15.

A16.

A l l .

ENGINEERING. CONTRACTOR

ADDRESS

CITY COUNTRY POST CODE FAX

EREC TION SITE:

NOMINAL (RATED) CAPACITY

API BARRELS (42 Gallon)

SAFE OPERATING CAPACITY APl BARRELS

TOP GAUGE OPERATING MAR^ Mlnutes g

Max.

Fllllng Rate

LOW GAUGE OPERATING MARGIN Minutes

@

Max

Pumpout Rate

NET WORKING CAPACITY API BARRELS

MAX. PUMPING RATES: IN APl BARRELS HOUR OUT APl BARRELS

START UP APl BARRELS HOUR

MAXIMUM OPERATING TEMPERATURE

PRODUCT STORED PRODUCT SPECIFIC GR AV IM AT

'C

VAPOUR PRESSURE psla

DESIGN MINIMUM METAL TEMPERATURE (SHELL) + W C

DESIGN MAXIMUM TEMPERATURE SHELL INTERNAL 93 ROOF EXTERNAL

CORROSION ALLOWANCE: SHELL 1.6 MM ANNU LARRIN G 3 MM

V

ROOF DESIGN:

UNIFORM LIVE LOAD

PONTOONTYPE DOUBLE DECK TYPE

25 POUNDS PER SQUARE FOOT

EARTHQUAKE DESIGN CIYE S O N 0 ZONE IMPORTANCE FACTOR I= 1.0

V

SITE COEFFICIENT

WIND LOADING: VELOCITY 100 MILES PER HOUR

SNOW ACCUMULATION NONE

RAINFALL (FROM KOC G00 7)

V ROOF DRAIN NUMBER, M P E 6 S E

SlLE RESTRICTIONS:MAX DIAMETER etres MAX HEIGHT M.ttar

FOUNDATION ?YPE

MAXIMUM ALLOWABLE PERIPHERAL SETTLEMENT UNIFORM

During orWmcUonL 1-1 TILT

OUTOFPLANE

V

MAXIMUM ALLOWABLE S E T N M E N T OF TANK BOTTOM AT OIL O W

ROOF MAIN ACCESS: RADIAL STAIRWAY

REMARKS:



KUWA IT OIL COMPANY

STANDA RD FOR FIELD ERECTED STORAGE TAN KS KOC -MV-00 7 APPENDIX C 2

EXTERNAL FLOATING ROOF STORAGE TANK

DAT A SHEET API STANDA RD 650

TAG NO.

SH T 2 OF

4

InfaMtion to compl.ted

by Contractor Contractor if not completed

by

Purchaser

PART B

:

CONSTRUCTlON DETAILS

l .

02.

03.

4

09.

10.

l l .

12.

Bl3.

814.

DESIGNER:

ADDRESS:

ClTY COUNTRY POST CODE FAT

CONSTRUCTOR ABRICATOR

ADDRESS

C rP l COUNTRY POST CODE FAX SERIAL NO.

MATERIAL SPE CIFICATIONSI TEELMAKING CHEMICAL ANALYSIS UMITATlONS MATERIAL GROUP (TABLE

2-

3)

V

SHELL ANNULAR RING:

ROOF:

3

BOTTOM:

STRUCTURALS:

V

SUPPLEMENTARY M ATERlAL TESTS AND/OR HEAT TREATMENT

NO. OF SHELL COU RSES

SHELL P LATE W IDTHS AND TH ICKNES S (INCLUDING CORROSION ALLOWANCE), IN MM:

1 3

5 7

2

4

6 8

TANK BOTTOM

:

THICKNESS MM SLOPE

MINIMUM WIDTH AND THICKNESS OF BOTTOM ANNULAR PLATES MM

INTERMEDIATE WIND GIRDER7 ES NO

TOP WIND GIRDER AS WA LKWAY?

YES

ROOF PLATE THICKNESS UPPER M Y LOWER ENTREDECK MM

OUTER RIM a 6M M OTHER MM

RIMSEALS

V

COATlNG TYPUCOL0URR)RY FILM THICKNESS SURFACE PREPARATlON

EXTERIOR:

SHELL INTERNAL: LINING ONLY

ROOF TOPSIDE:

ROOF OUTER RIM

ROOF UNDERSIDE: NONE

ROOF COMPARTMENTS INTERNAL NONE

STRUC TURAL INTERIOR:

V

BOT TOM LINING: YES HElGHT OF S HE U LINING

FIBREGLASS OTHER THICKNE SS

BOTTOM SURFACE PREPARATION

BOTTOM UNDERSIDE COATlNG

35

MICRONS COAL TAR EPOXY

V CATHODIC PROTECTION

:

BOTTOM UNDERSIDE

Typr

SUPPLEMENTARY NDE:



DOC.

NO.

KOC-MV-007 REV.

STANDARD FOR FIELD ERECTED STORAGE TANKS

:

KOC-MV-007 APPENDIX C2

EXTERNAL FLOATING ROOF STORAG E

TANK DATA SHEET API STANDA RD 650) TAG NO.

SHEET 3

OF

4

PART B CONSTRUCnON DETAILS contd.

W K ESTING: BOTTOM: VACUU M BOX FLOTAT ION COMPARTMENTS: AIR

@

INCH WG

PRESSURE REU EF SET POINT INCH WG

DETAILS OF INSTALLED VENTING D M C E S

apacttv

her Un lt l Number Nominal Ske odel

PRESSURE RELIEF:

8

INCH WG

RIMMHT:

INCH WG

AUTOM ATlC BLEED INCH WG

AUTOMATIC BLEED IN WG VAC

NUMBER S U E CAPACITY (State

U n b )

V

INSTALLED HEAT DETECTORS (NUMBER TYPEh LOCATION)

NUMBER SIZE h MOOEL OF FOA M POURERS

DRAW lNG NO:

TANKSIZE : DIAMETER MM SHELL HEIGHT MM

NUMBER OF ROOF SUPPORT LEGS

M - R O T A T l O N D M C E S

MAINTENA NCE HEIGHT OF ROO F SUPPORT LEGS

OPERAT lNG HEIGHT OF ROOF SUPPORT LEGS

ACTUATION LEMLOF AUTOMATIC BLEEDE R VENTS

MINIMUM SAFE OPERATING LIQU ID LEVEL

LOW GAUG E NORMAL OPERATING LEVEL

TOP GAUGE NO RMAL OPERATING LEVEL

DESIGN EST LIQUID LEVEL

DATE OF API STANDARD 650 EDITION R M SI O N

REMARKS

1.

All entries made after the first issue shall have triangular revision marks to identity the organisation responsible for the

entry and

the

date.

2. The Contractor shall submit this data sheet completed as far as practicable for approval in principle before proceeding

w th preparation of detail drawings.



KUWAIT OIL COMPANY

STANDARD FOR FIELD ERECTED STORAGE TANKS KOC-MV-007 APPENDIX C2

EXTERN L

FLOATING ROOF STORAGE

TANK DATA

SHEET

API STANDARD 650)

CONNECTlONS DATA TAG NO.

SHEET

4

OF

4

(DATA

NOT

ENE RED BY KUWAIT

OIL COMPANY

S H U BE

COMPLETED

BY THE

CONTRACTOR)

Quantity Size I Elevation Notes

Shell Bottom I

I

Cleanout Door I 36 x 48 Bottom Flush

Shell Manway

24

Shell ManwayN~xerMounting

Mam Prcdud Inlet

Mam Prcdud Bottom Outlet

Weir Height

500

mm with Vortex

Breaker

Water Draw-Off Sumps

Water Draw-Off Pipes

Nnrogen Purge

Corrosion Probe

1 I

Instruments

I

Other

Foam Pourer

Floating Roof I I I I

Rim Vent

r l r n U

I I

I

I

...elll,w,,,,,d Drain

(Plug) I 3

n. i



DOC.

NO.

KOC MV 007

I

Page 7 of 7 3 REV. 1

APPENDIX D SU MM AR Y OF DOCU MENT S ACTIONS FOR KOC APPROVAL

Routine Submission of Docume nts for Review pproval

lnspec tion Test Plans

Selection of Sub-contractors

Manufacturers of Shell Bottom Plates

Sub -orders for Procurement of Shell and Bo ttom Plates and Welded Pipe

Technical Purchase Specifications for Tank Fittings, Mountings, Seals, etc.

Material Certif ication Prior to Shipment in Certain Cases

Site Coefficient for Seismic Design

Crude Oil Storage Tanks requiring Anchorage

Calculations

Drawings

Overall Configuration of Floating Roof Tanks

Stre ng th Stab ility Criteria for Floating Roofs

Floating Roof Seal Type

Emergency Venting Calculations

Fab rication Erection Procedure

Heat Treatment Procedures

Procedures for Coa ting Lining

Tank C alibration Au thority

Tank Calibration Data / Tables

Field lnspection Coordination Procedure

Material Test Reports

Hydrostatic and Leak Test Procedures

NDE Procedures Technique Sheets

WPS's, PQR's W eld Key Plans

Comp leted Data Sheets prior to proceeding w ith detail design

Routine Submission of Documents for Information

9.5.4 Pressure/Vacuum Valve Capacity Data

9.10

Study of Evaporative Losses from Floating Roof Tanks

Alterna tive Proposals for Approval

4.7 Deviations from KOC -MV-007

7.1.1 Mate rial Sub stitutions

7.1.2

Equivalent Materials (no t l isted b y AP I-650)

7.1.3

Steels with Minimum Strength 70 000 psi

8.1 1

Alternative Arrangement of Bottom Connections

8.1 2.2

Use of shell banding

8.21.5 lnternal Fillets No t -Seal welded

8A.5 .1 Removal of Interna l Piping thro ugh Cleanout Doors

8A. 1 1.1 Attachment Detail of Top Angle-to-Shell

88.10 .2 Alternative Location of Oil Outlet.

9.2.3 Frangible Roof-to-Shell Join t

10 .4 Meth od of Cutt ing Plates

10.1 1.4

Removal of Temporary Attac hme nts b y Arc-Air Gouging

10.14.1

Alternative Calibration Method for Tanks for Hydrocarbon Storage

1 1.4.2

Deviation from Mixer Ma nufacturer's Installation Recommendations

1 1.7.1

Temperature o f Test Water

<

1O°C

1 1.7.5

Remedial Action for Excessive Settlement.

13.2.2

Use of Electrogas Welding for Vertical Shell Seams

R ou tin e Proposals fo r A D D ~ O V ~ ~

7.8.1

Proposal to Perform Repairs to Materials of C onstruction

12.8

Alternatives to W et Magne tic Partic le Examination

13.2.4 'Weldable Coatings



APPENDIX

E TANK CAPACITY LEVEL DEFINITIONS

D E S I G N L I Q U I D L E V E L

TO

THE

TOP O F T H E SHELL I N C L U D I N G

SHE

T O P A N G L E (IF ANY) AND

I H R E S P E C T N E O F T H E H E I G H T

OF NY O V E R F L O W P R O V I S I O N

MA X I MU M S A F E O P E R A T I N G

Y E L L IM I TE D BY THE

ECEV TlON OF

FOAM P O U R E R S ,

W E H P L O W , S K I M M I N G D E V IC E S ETC

MI N I MU M O P E R A T I O N L E V E L

I MI T E D

BY

P U M P S U C T I O N

H E A D R E Q U I R E M E N T S A N D

LIQUI O U T L E T E L E V A T I O N S .

FIXED ROO F OR EXTERNAL PLOA l ING

U N R O O F E D TYPE

./

R O O F

TYPE

- D E SI G N L I QU I D U V E L P E R C 4 3

AND

C . 4. 4 O F A P I R P

2350 1st Ed.)

-MIXER UT O U T L E V E L A T MI N I MU M

OPENA I IONAI, CLEAR ANCE FOR M W N C

t ~ ~

A U G E N O R MA L O P E R A T I N G L E V E L

LEGS A T T H E

- MIN I MU M S A F E O P E R A T I O N L E V E L W I TH

MINIMUM CLEARANCE BOTH

a

AND

b= 52 nm

AND

N O O T H E R I N T E R F E R E N C E

O F R O O F ,

S W .

D R A I N S LTC

NOTE.

MA R G I N S B E T W E E N S A F E O P E R A T I N G LEVELS A N D N O R MA L O P E R A T I N G

LIMITS AND

ALL

L E V E L I N S T R U ME N T S S H A L L B E D E F I N R D 1 N

THE

TANK

D A T A S H E E T I N T E R M S O F M I N U T E S

OF

F I L L I N G O R P U MP O U T

AT

MAXIMUM

S P E C I F I E D R A T E S .



Gen. Supd t. Consv. Insp.

Gen. Supdt. Fire Safe ty

DOC. NO KOC-MV-007

Gen. Supdt. Ahmadi Services

PRODUCTION EXPORT OPERATIONS GROUP

of

73

Gen. Supd t. Ma rine Expo rt Operations

Gen. Supdt. Prod. Svcs.

Gen. Supdt. Prod. Opns. (N&W)

Gen. Supdt. Prod. Opns. (S)

R N

This KOC Standard 'Field Erected Storage Tanks has been generated by the Task Force

(TF-Mech102) com prising the fol low ing members:-

ACKNOWLEDGEMENT

This Standard has been approved

by

th e Standards Technical comm ittee (STC) consisting o f

the fo l l ow ing :

Mr. Al i

H.

Baba

Mr. Mohd. Emam

Mr. S. Kumar

Dr. Moharnmad l lyas

Mr. Khalid S. AI-AIi

Mr. He nry S. Hi ll

Mr. Jassem Al-Quraini

Mr. S. Manickavachagam

(

Standard Div.

)

(

Insp. Con . Div.

)

(

Standards Div.

)

(

Standards Div.

)

(

Maint. Proj. Div.

)

Maint.'Plng. Div.

)

(

PMD North

)

(

Engg. Design Div.

Chairman

Depu ty Chairman

Member Secretary

Member

Member

Member

Member

Member

The draft of this Standard has been ci~cu late do the KOC User Departments for their revi ew

and comm ents were received from the fol lowing:

ENGINEERING GROUP MAINTENAN CE GROUP

Gen. Supdt. Engg. Services

Gen. Supdt. Maint. Services

Head of Tea m Engg. Projects

(N)

Gen. Supdt. Maint. (N W)

LOSS PREVENTION GROUP

INDUS TRIAL SERVICES GROUP

Koc_mv_007field Erected Storage Tanks

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