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CLASSIFICATION NOTES No. 10.1

ALTERNATIVE SURVEY ARRANGEMENTS FOR MACHINERY AND AUTOMATION SYSTEMS

SHIPS AND MOBILE OFFSHORE UNITS

JANUARY 1999

DETNORSKE VERITAS Veritasveien I, N-1322 Hevik, Norway Tel.: +47 67 57 99 00 Fax: +47 67 57 99 11

FOREWORD DET NORSKE VERJT AS is an autonomous and independent Foundation with the objective of safeguarding life, property and the environment at sea and ashore.

DET NORSKE VERITAS AS is a fuUy owned subsidiary Society of the Foundation. It undertakes classification and certification of ships, mobile offshore units, fixed offshore structures, facilities and systems for shipping and other industries. The Society also carries out research and .development associated with these functions.

DET NORSK F. VRRTT AS operntes a worldwide network of sur:rey stations and is authorised by more than 120 national administrations to carry out surveys and, in most cases, issue certificates on their behalf.

Classification Notes

Classification Notes are publications that give practical information on classification of ships and other objects. Examples of design solutions, calculation methods, specifications oftest procedures, as well as acceptable repair methods for some components are given as interpretations of the more general rule requirements.

A list of Classification Notes is found in the latest edition of the Introduction booklets to the "Rules for Classification of Ships", the "Rules for Classification of Mobile Offshore Units" and the "Rules for Classification of High Speed and Light Craft". In "Rules for Classification of Fixed Offshore Installations", only those Classification Notes that are relevant for this type of structure, have been listed.

The list of Classification Notes is also included in the current "Classification Services - Publications" issued by the Society, which is available on request. All publications may be ordered from the Society's Web site http://exchange.dnv.com.

C Det Norske Veritas AS 1999

Data processed and typeset by Division Technology and Products, Det Norske Veritas AS

Printed in Norway by Det Norske Veritas AS 99..01-29 10:46 • CnlO. I.doc

1.99.2000

If any person suffers los.s or damage which is proved to have been caused by any negligent act or omission of Dl!t Norske Veritas, then Det Norske Veritas shall pay compensation to such person for his proved direct loss or damage. However, the compensation shall not exceed an amount equal to ten times the fee charged for the service in question, provided that t he maximum compensation shall never exceed USO 2 million.

In this provision "Det Norske Veritas" shall mean the Foundation Det Norske Veritas as well as all its subsidiaries, directors, officers, employees', agents and any other acting on behalf of Det Norske Veritas.

CONTENTS

1. l.l 1.2 1.3 2. 2.1 3. 3.1 4. 4.1 4.2 4.3 4.4 4.5 4.6

4.7 4.8 4.9 5.

5.1 5.2 5.3 5.4

Introduction ............................................................. 4 Scope ......................................................................... 4 The classification concept.. ........................................ 4 Components and systems subject to Surveys ............. 4 Continuous machinery surveys (CMS) .................. 4 Conditions .................................................................. 4 Surveys by the chief engineer ................................. 4 Conditions ............................ ....... ......................... ...... 4 Planned maintenance system (PMS) ...................... 4 General conditions ..................................................... 4 Classification surveys which can be included ........... 5 Procedures for obtaining approval ............................. 5 Requirements to planned maintenance systems ......... 5 Implementation survey on board ...................... ......... 6 Retention of planned maintenance survey arrangement ............................................................... 7 Attention by the chief engineer .................................. 7 Damages and repairs .................................................. 7 Fees ......................................... ................................... 7 Survey arrangement condition monitoring (SACM) of rotating machinery ............................... 7 Introduction ............................................................... 7 Requirements to a SACM .......................................... 8 Procedures for obtaining approval ............................. 8 Annual survey ............................................................ 8

5.5 Retention of the approval .......................................... 8 5.6 Costs and fees ............................................................ 8 6. Tailshaft monitoring system (TMON) ................... 9 6.1 Introduction ............................................................... 9 6.2 Teclutlcal requirements ............................................. 9 6.3 Procedures for obtaining approval ............................ 9 6.4 Annual survey .................... ....................................... 9 6.5 Fees .................................................................... ..... 10 7. Appendix A. Planned Maintenance System -

Type Approval ....................................................... 11 8. Appendix B. Planned Maintenance System -

System Approval ............................. ...................... 13 9. Appendix C. Planned Maintenance System -

Vessel Approval ..................................................... 14 10. Appendix D. Planned Maintenance System -

MOU Approval ..•...•...•...•...••...•..•...............•....•...•.. 16 11. Appendix E. Survey Arrangement Condition

Monitoring ........ - ................................................... 18 12. Appendix F. TaiJshaft Monitoring ...................... 21 13. Appendix G. Guideline for Stern Tube

Lubrication Oil Analysis ....................................... 22 13.1 Scope ............................. ..................................... ..... 22 13 .2 General .................................................................... 22 13.3 Sampling Procedure ................................................ 22 13.4 Metal Analysis and Content Values ........................ 22

DET NORSKE VERITAS

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1. Introduction

1.1 Scope

The intention of this Classification Note is to give ship/Mobile Offshore Unit (MOU) owners and managers more detailed information than given by the Rules for the different alternative survey arrangements for machinery and automation systems. If nothing else is specified, all rule references in this Classification Note are given with references to Rules for Classification of Ships/MOU Pt.7 Ch.2.

1.2 The classification concept

The classification service is performed on the basic assumption that all ships and mobile offshore units are to be subjected to periodical surveys, to verify that the ship/MOU is properly maintained and thereby that the structure and machinery installations are in satisfactory condition.

In order to arrange the surveys as conveniently as possible for all parties, DNV provides a flexible range of survey procedures that are well adapted to different modes of operations and maintenance systems. Owners/Managers may choose the most favourable combination of the following arrangements.

1.3 Components and systems subject to Surveys

An Inventory List for machinery is to be established for each vessel identifying all components and systems subject to class survey.

2. Continuous machinery surveys (CMS)

2.1 Conditions

The Society may, upon request from the Owners/Managers, as an alternative to the renewal surveys, accept continuous surveys of all machinery items listed in the lnventory List.

This is based on the conditions that the items are surveyed at intervals not exceeding 5-years for vessels with main character of class LA 1.

3. Surveys by the chief engineer

3.1 Conditions

The Society may, upon request from the Owners/Managers, accept that continuous machinery surveys be partly carried out by the Chief Engjneer of the vessel/MOU.

The vesseVunit has to be manned with a Chief Engineer having in his possession a valid Authorisation Letter issued by the Society in accordance with the requirements given in the Rules for Classification of Ships/MOU Pt.7 Ch.2. On request, the Authorisation Letter is to be presented to the Society's surveyor.

Classification Notes No. JO.I

January 1999

The request for authorisation of Chief Engineer is to be forwarded by the owner to DNV, which will issue the authorisation letter when the candidate is found to satisfy the rules. A Chief Engineer approval is automatically terminated ifhe changes employment.

For MOU where it is not required to have a certified Chief Engineer, other persons in charge of the maintenance may be accepted on a case by case basis (Ref. Rules for MOU Part 7 Ch.2).

All surveys taking place at ports where the Society is represented are to be carried out by surveyors to the Society.

Half of all items covered by the continuous machinery surveys scheme, of which there are more than one, may be surveyed by the Chief Engineer (i.e. the Chief Engineer may survey half of all identical items in one five-year survey cycle). The Chief Engineer may wholly survey auxiliary diesel engines and turbines. Only a test run including testing of safety functions in the presence of the surveyor will normally be required.

It is a condition that all surveys carried out under supervision of the Chief Engineer are recorded in the engine logbook and relevant extracts are given to the first attending surveyor. Direct reporting from the Chief engineer will not be accepted. The surveyor may, if he finds it necessary, require a re-survey of the parts in question.

Overdue items will not be accepted surveyed by the Chief Engineer.

4. Planned maintenance system (PMS)

4.1 General conditions

The Society's Rule requirements to periodical surveys make it possible to establish a survey arrangement for retention of class based on planned maintenance on board. This survey arrangement is described in the Rules for Classification of Ships/MOU Pt.7 Ch.2 "Survey Arrangement based on Planned Maintenance System".

This type of survey arrangement has to be approved and can be granted to any type of ship and mobile offshore unit, provided that requirement in this part is complied with. Among others, sufficient instructions for a preventative maintenance as well as instructions for "Main Overhaul"/"Class Survey" of all types of class related machinery are to be available onboard.

Jn order to retain the PMS survey arrangement it is a condition that a Chief Engineer or on a MOU, an other person, with DNV Authorisation Letter is responsible for the surveys carried out, which later are to be credited by a surveyor as "passed class surveys".

In case of sale of the ship/MOU or change of management, the survey arrangement is automatically cancelled. The new Owner/Manager must then apply for a new approval according to the specified procedure.

DETNORSKE VERITAS

Classification Notes No. 10.1

January 1999 In case of change of the Owners/Managers name, DNV is to be notified in order to update the relevant certificates.

The Society reserves the right to cancel this survey arrangement, usually with 12 months notice. If, however, it should be evident that the condition for granting the survey arrangement is not adhered to or complied with, the approval can be withdrawn with immediate effect.

It should be noted that the Owners/Manager at any time might revert to the Renewal or Continuous Survey procedure.

4.2 Classification surveys which can be included

4.2.l Machinery Surveys.

A survey an-angemcnt based on PMS shall include at least machinery and equipment included in the Continuos Machinery Survey scheme, CMS, according to the Inventory List, and the instrumentation and automation equipment covered by the Rules for Classification of Ship and for Classification of Mobile Offshore Units Rules Pt 7 Ch.2. For Mobile Offshore Units, drilling and production equipment may be included if requested. Owners/Managers shal 1 provide necessary documentation in order to include drilling and production equipment in the PMS scheme.

4.2.2 Exceptions

Sea- and sanitary valves and scuppers included in the CMS arrangement are always to be surveyed by a surveyor. (See inventory list: MM SEA, MM SAN).

Parallel operation and testing of electrical generators are to be carried out in the presence of a surveyor. (See inventory list: XX OVE)

4.2.3 EO and ECO Surveys

The PMS survey arrangement may also include as a minimum the test programme/procedure for the surveys of the additional class notation EO for "Periodically Unattended Machinery Space" and ECO for "Machinery Centralised Operated (Pt.6 Cb.3 in the Rules for Classification of Ship) at Owner's cho ice.

4.3 Procedures for obtaining approval A survey arrangement based on planned maintenance is obtained in three steps, as follows:

• PMS system approval or type approval • PMS implementation survey • PMS final vessel approval

4.3.1 PMS Approval

a) To obtain a System Approval, the Owner/Manager is to make a formal request to DNV, accompanied by the documentation as listed in chapter 4.4

This documentation should include a comprehensive description of the system, and also how the machinery items are identified in order to convert from applied maintenance system into DNV coding system or vice versa.

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Owner/Manager must apply for a system approval, but if the Owner/Manager wants a consulting firm to do this on his behalf, he may do so. A certificate "Planned Maintenance System - System Approval" will be issued when the system is f<;mnd to satisfy the DNV requirement, see Appendix B.

The system approval is valid for all ships/units managed by the Owner/Manager, having this Planned Maintenance System implemented on board.

If the Owner's Planned Maintenance System is to be conve1ted, altered or renewed, the changes are to be documented and are to be approved by the Society in advance.

b) A system supplier of PMS may apply for a Type Approval of their system. The condition and requirements are specified in document Type Approval Programme No.: 10-706.70-1, Certification Notes No. 1.2 and a Type Approval Certificate, see Appendix A.

If an Owner/Manager chooses to purchase a Type Approved PMS, all the requirements in chapter 4.4 are covered in the Type Approval Programme.

The main advantages for the Owners/ Managers with a Type Approved PMS are as following:

A system assessment has been carried out and Class approval granted. The Owner/Manager may choose a Type Approved system from a list of Type Approved Products issued by the Society.

No fee charged the Owner/Manager for system assessment/approval.

4.3.2 PMS - Implementation Survey

The second step is the implementation survey of the Planned Maintenance System on board as basis for granting this survey arrangement to each ship/MOU. This is described more detailed in chapter 4.5.

4.3.3 Final PMS Vessel Approval

As a last step in the approval procedure, a certificate "Planned Maintenance System - Vessel Approval" will be issued by DNV, upon confirmation from the attending surveyor that a successful implementation survey has been carried out, see Appendix C.

4.4 Requirements to planned maintenance systems A PMS should be considered as a part of the managemen~ system, and is considered to at least satisfy the minimum requirements laid down in the International Standard of Management Code (ISM) concerning class related machinery items, and the automation equipment covered by the Rules.

DETNORSKE VERITAS

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The basis for intervals and extent of maintenance are normally as recommended by manufacturers, documented operator's experience and condition monitoring where fitted.

For all it.ems and systems covered by the PMS, the maintenance category and job description for "Main Overhaul" of the respective it.ems should at least cover/fulfil the Rules for Classification of Ships Pt. 7 Ch.2 (TableE1 Machinery Surveys) requirements for "Class Survey" with respect to opening up, testing etc.

It is a condition that the job description for "Main Overhaul" and ,,Class Survey" should be harmonised and given on the same job order.

A "Main Overhaul" of a component includes:

A representative internal inspection, and e.g. measure tolerances, clearances, followed by replacement or overhaul if defectv are detected. In cases where the overhaul consists of more sub-actions at different intervals, "Main Overhaul" is when the Iota! cycle is completed.

When the manufacturers recommendation for "Main Overhaul" intervals based on running hours or Condition Monitoring normally exceed 5-years, the items can still be credited at the completion of the CMS cycle, provided that satisfactorily maintenance history is documented.

When the EO/ECO class is to be included in the PMS, test intervals should not exceed the intervals as specified in the EO/ECO maintenance manual and in no case exceed 12 months. The instructions for testing should cover the extent as specified in the EO/ECO maintenance manual and the Rules for Classification of Ships Pt.7 Ch.2, for Annual - and complete Renewal Survey.

Testing of all items covered by this class notation may be directly included in the maintenance system. However, it is also considered as sufficient that there is a reference from the maintenance system to the BO/ECO maintenance fiJe and manual, so that the latter is used as an indirect part of the maintenance system.

Documentation on all maintenance work carried out on items/systems covered by the Rules is to be signed by the Chief Engineer. With computer systems, the Chief Engineer is responsible for the updating of the system.

For computerised systems, back-up routines are to be established.

The description and documentation of the Planned Maintenance System are to be in English. For ships trading in specified areas, for instance ferries, Planned Maintenance Systems using other languages than English may be accepted. ln such cases, a surveyor who understands the language will have to carry out the Implementation Survey and Annual surveys. Possible extra costs concerning this service will be invoiced the owner. The survey arrangement based on planned maintenance is then automatically cancelled in case of change of trade.


January 1999

A planned Maintenance System is to include documentation of:

• Inventory Content, i.e. items/systems included in the maint.enance program.

• Maintenance Time Intervals, i.e. time intervals at which the maintenance jobs are to take place.

• Maintenance Instructions. i.e. maintenance procedures to be followed.

• Maintenance documentation and history, i.e. records of maint.enance jobs carried out and the results.

• Routines for "Handling of Postponed Jobs", i.e. the system is able to keep the control of new due dated.

• Reference Documentation, i.e. performance results and measurements taken at certain interval for trend investigations.

• Electrical equipment, i.e. generators, el. motors, mainand emergency switchboard etc., documentation of test/maintenance procedure and time intervals to be followed.

• Instrumentation/ Automation Equipment, i.e. if EO/ECOclass is included, documentation oftest/maintenance procedures a,nd time intervals to be followed.

• Condition Monitoring, i.e. if applicable, specification of the machinery covered including:

engine rpm, load condition location and orientation of sensors and measurement point~

type and model of instrumentation schedule of measuring acceptance criteria calibration interval of measuring devices It is a condition that base line data are available.

• Routines for reporting and use of maintenance history data for continuous improvement of the Platllled Maintenance System.

• Examples of all of these types of documentation are to be submitted in connection with the system approval, together with:

A description of the Owners/Managers maintenance policy. (Copy of the Maintenance part in an operation/QA manual is acceptable) Organisation Flow-Chart, i.e. identifying reporting procedure between the vessel/Owners office and the areas of responsibility.

4.5 Implementation survey on board

When the Owner's PMS has been approved and the system has been used onboard for at least 6 months, the Owner may request, DNV for an implementation survey by a surveyor. The purpose of this survey is to verify that the PMS is implemented in accordance with the approved documentation, and that all components in CMS, EO/ECO (if applicable) are covered by the planned maintenance system.

During the implementation survey, the surveyor shall verify that the following items are fulfilled:

DETNORSKE VERITAS


January 1999 The ship/MOU is manned with a Chief Engineer having a valid Authorisation Letter issued by the Society in accordance with the requirements of the Rules for Classification of Ship and for Classification of MOU, Pt.7 Ch.2) The personnel on board are familiar with, and motivated towards using the Pl anned Maintenance System as an important tool for improving safety Every job description and extent of "Main Overhaul" at least cover/fulfil the Rule requirements for "Class Survey" with respect to opening up, testing etc The system can produce "printout"/ summary of classrelated items which have been subject to ''Main Overhaul" since last annual survey Acceptance criteria/limitations are clearly defined if some maintenance intervals are based on condition monitoring (CM) It is clearly stated when maintenance intervals are based on operating hours Routines for reporting and use of maintenance history data for continuous improvement of the Planned Maintenance System.

In some cases, it is impossible for the Owner/Manager to have at all times a Chief Engineer with an Authorisation Letter on board. In such cases the Owner/Manager is obliged to establish an arrangement with a Chief Engineer (DNV approved) who is responsible for the planned maintenance on board. He is to be on board at least 6 months during the last 12 months.

4.6 Retention of planned maintenance survey arrangement

An annual survey for PMS is required to prolong the validity of the arrangement approval. This survey will nonnally be carried out together with the regular Annual Survey (AS)

The purpose of this survey is to review and evaluate the past period's maintenance activities and experience.

The performance and maintenance records will be examined to verify that the machinery has fu nctioned satisfactorily since the previous survey and the overhaul intervals have been generally maintained.

The attending surveyor will carry out function tests, confirmatory surveys and random check readings, where condition monitoring equipment is in use, as found necessary. Based on the outcome of the evaluation of the maintenance history, function tests etc. the surveyor will confirm the validity of the planned maintenance system until the next Annual Survey.

By completion of the 5-year CMS cycle, all items shall have been credited. Items maintained according to running hours or condition monitoring criteria, without a "Main Overhaul" carried out in the cycle, may be credited based on a satisfactory maintenance/condition monitoring records, clearly indicating that the maintenance is not calendar based.

4. 7 Attention by the chief engineer

Surveys carried out by the Chief Engineer according to the rule requirements are not considered as "passed class surveys" until accepted by the attending surveyor.

Survey for crediting 6'f class surveys in connection with the PMS survey arrangement is nonnally to be requested only once a year (in connection with the Annual Survey). By change of the ownership a survey may be requested in order to credit the surveys carried out by the Chief Engineer, according to the rules as "passed class surveys".

4.8 Damages and repairs

If machinery or equipment covered by PMS sustain damage of such an extent that it is presumed to lead to a "Condition of Class'', this is to be reported to the Society without any delay. A Survey will then be carried out as found necessary by the Society.

4.9 Fees

The Society will charge a fee for the System Approval according to the current scale of fees. For each ship/MOU, the fee will be charged for implementation of the survey arrangement. The PMS fee charged during the subsequent Annual Survey will be 20% of total CMS-fee, with a reduction of 15% compared to the original fee.

If EO/ECO is included in the survey arrangement, a reduction of 15% will be given compared to the original fee for the annual EO/ECO survey. Travelling and subsistence allowance is additional.

5. Survey arrangement condition monitoring (SACM) of rotating machinery

5.1 Introduction

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Turbine machinery equipped with fixed and/or portable instrumentation making it possible to ascertain the condition by observing or monitoring certain parameters under running conditions, has been accepted for a special SACM with reference to the Rules for Classification of Ships Pt.7 Ch.2.

As an integral part in a PMS the same condition assessment and measurement technique/method(s) may also be applied to other rotating machinery components. (As for instance, diesel engines upon special request.)

It is emphasised that the condition monitoring system does not replace neither the nonnal daily surveillance nor the Chief Engineer's responsibility for taking decisions in accordance with his judgement.

An approval document will be issued by DNV, specifying the extent and method of the surveys. This is described in the Certificate of Approval, see Appendix E. The Certificate of Approval is to be kept on board. The approval of this survey arrangement will have a validity of 5 years.

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Jn case of sale of the vessel or change of operating management, the survey arrangement is automatically cancelled. The new Owner/Manager must then apply for a new approval according to the specified procedure.

The Society reserves the right to cancel this survey arrangement, usually with 12 months notice. Tf, however, it should be evident that the condition for granting the survey arrangement is not adhered to or complied with, the agreement can be withdrawn with immediate effect.

5.2 Requirements to a SACM

It is a basis that the machinery is surveyed according to the CMS scheme. The machinery covered by the SACM should at least be fitted with alarms and controls in accordance with the Rule requirements for unmanned operation, EO/ECOclass, Rules for Classification of Ships Pt.6 Ch.3. A condition monitoring system should for instance be composed of the following items or combination of items, perfonnance measurements and verification of

• Bearing wear down measurement • Rotor axial displacement • Power input/outputs • Pressures/Temperatures • Flow velocity/volume • Thennodynamic efficiency • Vibration measurements and analysis of rotating

machinery, including ball and roller bearings • Lubrication oil analysis

The vessel is to be equipped with a portable battery operated instrument for vibration measurement, or a pern1anent sensor arrangement for vibration COlUlected to a central processing unit. It is required that the instrument provides possibilities for frequency analysis. The instrumentation equipment and if computerised, the software is to be suitable for the specific installation.

The survey arrangement is accepted if the crew of the ship is measuring and recording at regular intervals (I to 3 months) the above listed parameters. Moreover, certain performance measurement data have to be forwarded to DNV, every 3 months for evaluation.

5.3 Procedures for obtaining approval The Owner/Manager requests approval to DNV.

A request to the Society has to include information about the machinery the Owner/Manager wants to be covered by the survey arrangement They are free to choose the machinery components as long as they are suitable for such an arrangement.

For establishment of an SACM a specially authorised surveyor, will carry out a complete reference measurement taken under defined operating conditions, as well as a limited visual inspection of all machinery involved in the ai:rangement.


January 1999

Based on the machinery included in the survey arrangement and the reference measurements carried out the Society prepare:

an "Instruction-Guideline Record File" a machinery database (if computerised system) a complete interpretation/analysis of reference data alann/reporting level will be estahlishecl

All performance and interpretation of data, together with data sheets (if manual recording) of condition monitoring measurements will be included in the "InsttuctionGuideline".

5.4 Annual survey An annual audit will be canied out by a surveyor. The surveyor will examine the database or data sheets (as applicable) and check that all the required measurements have been carried out systematically and that the measurements and recording procedures specified in the "Instruction-Guidelines" are generally being complied with. Furthermore, he will check that the data obtained are witl1in the specified limits. This survey is to be carried out in connection with the regular Annual Survey (AS).

5.5 Retention of the approval

The SACM renewal survey at the end of each 5-year period starting from the date where the reference measurements were established, has to be carried out by a surveyor with a Certificate of Competence. For re-evaluation of the condition of machinery data, the surveyor will carry out condition monitoring measurements and performance tests, similar to those carried out when the reference measurement data were taken.

Provided that the surveyors own measurements and analysis indicate that no significant deterioration have taken place in the condition/performance of a machinery component, the survey will in general be limited to the survey requirements specified in the

"Instruction-Guidelines". This implies that the Society will not nonnally require these components to be opened up for extensive visual inspection upon Renewal Survey.

Otherwise, if the surveyor finds that there is indication in the measurements of a possible deterioration in the condition of a component, he has the right to require opening as found necessary or revert to nonnal inspection procedures according to the Society's Rules .

The SACM renewal survey is to be requested to DNV.

5.6 Costs and fees Approval, implementation survey and SACM renewal surveys of the SACM survey agreement will be charged according to time spent.

D ET NORSKB VERITAS

Classification Notes No. 10.l

January 1999 For annual survey, no fee is charged if carried out simultaneously with the regular Annual Survey (AS), otherwise charged according to time used.

Travel and subsistence will be charged according to the Society's standard practice.

6. Tailshaft monitoring system (TMON)

6.1 Introduction

For oil lubricated tailshaft arrangements equipment with instrumentation making it possible to ascertain the condition of the tailshaft and bearing, the Society may grant special approval for 15-year intervals between complete surveys. This survey arrangement is described in the Rules for Classification of Ships Pt.7 Ch.2 - "Tailshaft Monitoring".

Based on an approval of the tailshaft arrangement and a satisfactory implementation survey on board, a "Certificate of Approval for Alternative Survey Arrangement Tailshaft Monitoring" is issued, see Appendix F. The certificate is to be kept on board.

The survey arrangement is valid until cancelled, in writing, by the Society, generally with 12 months' notice. The cancellation can be made with immediate effect, if it is evident that the conditions are not adhered to.

The Owner/Manager may at any time revert to the norma1 survey arrangement in accordance with the Rules for Classification of Ships Pt.7 Ch.2 "Tailshaft Survey".

6.2 Technical requirements

The tailshaft arrangement should be equipped as follows :

• At least two {2) temperature sensors are to be installed in the aft stem tube bearing, in the aft part of the aft bearing bush as close as possible to the bearing surface, or submerged in the aft part of the bottom, longitudinal slot for lubricating oil, in the aft bearing bush, where max. heat can be expected. One (I) sensor is acceptable if the sensor is easily replaceable (at sea) and a spare sensor is stored on board.

• High stern tube bearing temperature alarm. • Low level alarm for lubrication oil gravity tank. • Oil sealing rings arc to be replaceable without removal

of propeller or shaft. • Arrangement for cl1ecking of bearing wears without

removing of sealing box.

For vessels with keyed propeller satisfying the above requirements, the survey arrangement may be granted, if the propeller is dismantled and the keyway and fore part of the taper is checked for cracks at 5-year intervals.

6.3 Procedures for obtaining approval

The Owner/Manager may request approval to DNV. The following information is to be submitted:

• Drawings showing shafting arrangement, stern tube bearing, shaft sealing, position of temperature sensors. The Owner/Manager is to request an implementation survey by a surveyor to the Society. The purpose of this survey is to verify and report the following:

• Information on lubrication oil supplier, quality, volume in system, set point for stem tube bearing temperature alarm.

• Correct readings of remote thermometers for stem tube bearing, seawater and alarm set point.

• Test low level alarm, lubrication oil gravity tank. • Verify normal stem tube bearing clearances by records

from previous measurements (if any).

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• A general survey of shafting and sealing arrangement. If the implementation survey is done during dry-docking, the surveyor will in addition to the surveys mentioned above:

• Verify stern tube bearing clearance measurement, and check the sealing boxes for possible oil leakages. Based on the above mentioned infonnation the Society will prepare a "Tai lshaft Monitoring Record File" for filing on board, together with supplies of a test kit for control of the water content in the stern tube lubrication oil system. The "record file" contains technical information on the tailshaft arrangement, conditions for the alternative survey arrangement and forms for regular recording of all necessary measurements.

The lubricating oil is to be monitored regularly for water content and possible debris of white metal. Tests to be taken at least once a month by the crew.

6.4 Annual survey

An annual survey is required to prolong the validity of the approval. This survey is to be carried out in connection with the regular Annual Survey (AS).

Upon this survey the surveyor will review and evaluate all parameters recorded by the Chief Engineer at regular intervals in the "Record File".

Tn addition to the regular monthly checking of the lubrication oil by the ship's staff, the surveyor will also check that the stem tube lubrication oil has been analysed by a recognised laboratory at least once a year. The documentation from this analysis is to contain a conclusion regarding further use of the oil. Reference is also made to guideline from IACS (International Association of Classification Societies), see Appendix G.

A correct functioning of all instruments and alarms required for the monitoring is a condition for acceptance. In addition, it will be checked that a spare temperature sensor is available on board if only one sensor is fitted in the stem tube bearing.

DET NORSKE VERITAS

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6.5 Fees The Society will charge a fee for the approval, implementation survey and the "test kit'1 all included. The fee for annual tailshaft monitoring survey is included in the "Annual Survey" fee.


January 1999

Surveys for tailshafts with key at each 5-year interval and Complete Tailshaft Monitoring survey each 15-year will be charged according to the "Scale of fees".

DET NORSKE VERITAS

Classification Not~ No. 10.1

January 1999

7. Appendix A. Planned Maintenance System - Type Approval

-DET NORSKE VERITAS

TYPE APPROVAL CERTIFICATE

CERTIFICA'IENO. M-PMS-1997 This Certificate consists of2 pages

This is to certify that the PLANNED MAINTENANCE SYSTEM FOR MACHINERY

with type designation(s) EROS-A, VERSION. 1.02.1

Developed by System Supplier A/S

OSLO, NORWAY

is found to comply with DET NORSKE VERITAS' RULES FOR CLASSIFICATION OF SHIPS AND MOBILE OFFSHORE UNITS

CERTIFICATIONN01E2.9, TYPEAPPROVALPROGRAMMENO. 10-706.70-1 CERTIFICATION NOTE 1. 2, TYPE APPROVAL DECEMBER 1996

Application The PlaMed Maintenance System is approved for use onboard DNV classed vessels with the

Survey Arrangement based on Planned Maintenance System (SA-PMS)

Place and date H0vik, 24th June 1997

for DET NORSKE VERITASAS

Head of Section

This Certificate is valid until 24th June 2001

Surveyor

N oUce: Tiu. CerUftcate i. aubjeet to ~nns and condltlou overleaf. A1f1 lipltlcmtt chanie In dt91p or cmutructton may render lhJa Cutlllc1lte Invalid.

If .ny pen,on,..,,,.,.. mt« ,. • to.._.,. bewl y ll'(f negl~ ad or ori•.tkin of Git t«w'ak9 .a., Vwn o.t ~vent .. tNI pay ~IMllllon to wet\~ br • ~ lfreii:t • « dam.age. ~. tM~onWI not uotff an 'ilnOt.lt ....... fOtln..,,.. tM fM cMt;itd kir~ w.b llt ..... on,, SinM6"1tlwt °"' ,,.,.J!Mlm CO~M ~ MW1dOMdUSO 2. mtfm.ln this pcOYIMon 'Cwt~· V.:ttat• lhal me•nlht,~DlfNrcnkeV--•wofu.,lt9*'*....._,~aflotn,efl1>lo1ff9,a..,c•McJMYdhwdloonblNWcl0...Hot..uV_..,

DET NORSKB VERITAS AS

Form No.: 20.90a Issue: Ja.nuuy 98

V£1UTASVEIEH 1, 1322 Hllll/IK, NORWAY TEL.: (+.C7) 67 57 Dll 00

DETNORSKE VERITAS

FAX: (+.47) 67 57 99 11

P11ge 1 ot2

11

12 Classification Notes No. 10.1

January 1999

Cert. No.: M-PMS-1997

System description

This system is a WINDOWS based tool for systematic planning of maintenance and as documentation of maintenance carried out.

Application/Limitation

The system shall at least cover all Class related machinery items and EO/ECO items. In order to obtain the Sunrey Arrangement based on a Planned Maintenance System (SA-PMS) for a specific vessel, an Implementation Survey is required to be carried out onboard by the Society.

Type Approval documentation

• User guide for EROS-A FOR WINDOWS • Database Specification • Standard tender • EROS-A Development Manual • Program for training and suppon • Technical and economical analysis procedure • Backup procedure • Complete software package of EROS-A FOR WINDOWS, ver 1.02.1, including database

form existing vessel

Tests carried out

A System Evaluation is carried out to verify that all the requirements are included in the system.

Identification of system

The identification is stated in "About" in the "Help-menu".

Certificate retention evaluation

Before the expiry date, an evaluation of new requirements and changes to the system shall be carried out according to the requirements in Certification Note 2.9 for renewal of the certificate.

During the validity of this Type Approval Certificate, all relevant changes and launching of new versions to be reported and approved by DNV.

END OF CERTIFICATE

DET NORSK.E VERITAS AS \IERITASVEIEN 1, 1322 H0VIK, NOFMIAY

Form No.: 20.9Qa ls.sue: January 98

DETNORSKE VERITAS

TEL: {+47) 07 57 98 00 FAX: (+41) 67 57 9911

Page 2 of2

Classification Note No. 10.1

January 1999

8. Appendix B. Planned Maintenance System - System Approval

MACHINERY PLANNED MAINTENANCE SYSTEM

SYSTEM APPROVAL

This is to certify that the

Owner/Manager: BILLY TANKER & CO. AJS have been granted approval of their computerised Planned Maintenance System, type: EROS-A Version 1.02.1 as basis for survey of machinery for retention of class. The Approval is based on a description of the Owners maintenance policy and the Plaruted Maintenance System, submitted with the Owner's/System SY!Wlier's letter of 24th June 1997.

GENERAL This Approval will be accepted as basis for a survey arrangement as stated in the present Rules of the Society for Classification of Ships, Part 7, Chapter 2, and components and systems covered by the present Rules of the Society for the additional class notation EOIECO.

Each particular ship operated by the above mentioned Owner/Manager having this approved Planned Maintenance System in operation, may be granted a separate approval for the mentioned survey arrangement with reference to this document after a survey of the implementation of the Planned Maintenance System has been carried out on board with satisfactory result.

The Chief Engineer in charge of the Planned Maintenance System is to have in his possession a valid Letter of Approval issued by the Society as stated in the present Rules for Classification of Steel Ships, Part 7, Chapter 2.

VALIDITY OF APPROVAL The approval is valid until cancelled, in writing, by the Society, generally with 12 months notice. The cancellation can be given with immediate effect, if it is evident that the conditions of the approval are not adhered to.

H0vik/Oslo,

for DET NORSKE VERIT AS AJS

Head of Section

DETNORSKE VERITAS

13


January 1999

9. Appendix C. Planned Maintenance System - Vessel Approval


VESSEL APPROVAL

This is to certify that: MIT "BLACK BIRD" - ID. NO. - 01999

Managed by: BILLY TANKER & CO. AJS has been granted a survey arrangement in accordance with the present Rules for Classification of Ships, Part 7, Chapter 2, based on the computerized Planned Maintenance System, type: EROS-A Version 1.02.1 approved by the Society, Approval No. PMS/S- 499 dated 24'" June 1997.

GENERAL The conditions stated in the Approval of the Planned Maintenance System and in the Appendix to this Approval are to be complied with. The Society reserves the right to make alterations in these conditions at any time due to amendments in our Rules or approval practice.

EXTENT OF APPROVAL The survey arrangement includes the following:

Machinery components and systems covered by the Rules of the Society and which are subject to the Continuous Machinery Survey scheme. A detailed listing of the items are given in the "Inventory List", Fonn No. 72.65a, for this ship. Components and systems covered by the Rules of the Society for the additional class notation EO/ECO.

VALIDITY OF APPROVAL The survey arrangement is valid until cancelled, in writing, by the Society, generally with 12 months notice. The cancellation can be given with immediate effect, if it is evident that the conditions are not adhered to or complied with. The survey arrangement is automatically cancelled in case of sale or change of management of the ship. The Owner/Manager may at any time revert to the nonnal Continuous Machinery Survey or alternatively the Renewal Survey procedure.

Hevik/Oslo,

for DET NORSKE VERIT AS AJS

Head of Section

DET NORSKE VERITAS


January 1999

PLANNED MAINTENANCE SYSTEM

BASIC CONDITIONS

Appendix to Approval PMS/S- 499/05

(revised 1997.01.01)

The machinery survey arrangement is granted on the condition that the Ship's Chief Engineer is responsible for: adherence to the approved systems for planned maintenance and function control proper records of maintenance, machinery functions, and control activities are kept on board, written in the English language and are made available to the Society's Surveyor at all times on his request reference operating data for all essential machinery, are kept available on board a Surveyor is notified to carry out an annual review of machinery functions and maintenance a Surveyor is notified and his presence requested in case of sustained damage which may have significance for the availability of machinery functions.

The following surveys are to be carried out: Annual Survey of Planned Maintenance System This survey is required to prolong the validity of the approval of the granted survey arrangement. The nonnal procedure will be to carry out this survey in connection with the Annual Survey. See the Rules, Part 7 Chapter 2.

- Survey of Damages If machinery or equipment which is covered by class inspection sustains damages of such extent that they may be presumed to lead to Condition of Class, the ship is to be surveyed by a Surveyor to the Society. The survey is to be of the extent which the Surveyor considers necessary for ascertaining the amount of damage.

- Survey of Repairs When machinery or equipment which is covered by classification is to be subjected to repairs of any significance, the work is to be carried out under supervision of the Surveyor according to the Rules applying to new constructions as far as these are applicable.

EXTENT OF ANNUAL SURVEY FOR PLANNED MAINTENANCE SYSTEM (SA PMS) Review and evaluation of the past period's maintenance activities and experience The items which have been subject to "main overhaul"/"class survey" under the Chief Engineer's supervision during the last year shall be recorded as "passed survey'' on Fonn No. CME 001. The "passed survey" date will be the date when the surveyor attend the vessel for the annual inspection of the PMS records. This date will be noted in the inventory list Fonn No.72.65a on .board. A "print-out" of'the maintenance work "main overhaul"/"class survey" carried out since the last annual survey to be handed to the attending surveyor. At the discretion of the Surveyor function test will be carried out on the items recorded as "passed survey" when practicable. At the discretion of the Surveyor spot checking of the control and monitoring systems for the machinery items and, when relevant, for the additional class notation EO/ECO will be carried out for the items recorded as "passed survey". If deemed necessary, due to evaluation of history documents or result of testing, the Surveyor may require opening and/or testing of machinery. In severe cases he will issue a Condition of Class to compliance with the condition set forth for the survey arrangement.

FEES The fee charged during the Annual PMS Survey will be 20% of the total current Scale of Fee for Continuous Machinery Survey. For Continuous Machinery Survey and EO/ECO a discount of 15% will be credited. Until the vessel has completed her present 5-year cycle; i.e. until the expiry date of the classification certificate is reached. The fee to be charged in accordance with our present routines, the number of items reported multiplied by the fee with a 15% discount. Expenses in connection with travel and subsistence will be added.

DET NORSKE VERIT AS

15

16 Classifi.cation Notes No. 10.1

January 1999

10. Appendix D. Planned Maintenance System - MOU Approval S4krpL lVoT To £ OJVL Y

Bl£ lIS1£]) PMS/DR - 499105


MOBIL OFFSHORE UNIT APPROVAL

This is to certify that: D/R "OIL DRILLING" - ID. NO. 01999

Managed by: OIL DISCOVERY & CO. A/S has been granted a survey arrangement in accordance with the present Rules for Classification of Mobile Offshore Units, Part 7, Chapter 2, based on the computerized Planned Maintenance System, EROS-A Version 1.02.1 approved by the Society, Approval No. PMS/DR- 499 dated 24'h June 1997.

GENERAL The conditions stated in the Approval of the Planned Maintenance System and in the Appendix to this Approval are to be complied with. The Society reserves the right to make alterations in these conditions at any time due to amendments in our Rules or approval practice.

EXTENT OF APPROVAL The survey arrangement includes the following:

Machinery components and systems covered by the Rules of the Society and which are subject to the Continuous Machinery Survey scheme. A detailed listing of the items are given in the "Inventory List" , Form No. 72.65a, for this MOU. Components and systems covered by the Rules of the Society for the additional class notation, EO/ECO, Drill/Drill(N) and Production equipment.

VALIDITY OF APPROVAL The survey arrangement is valid until cancelled, in writing, by the Society, generally with 12 months notice. The cancellation can be given with immediate effect, if it is evident that the conditions are not adhered to or complied with. The survey arrangement is automatically cancelled in case of sale or change of management of the MOU. The Owner/Manager may at any time revert to the normal Continuous Machinery Survey or alternatively the Renewal Survey procedure.

H 11JVik/Oslo, for DET NORSKE VERIT AS A/S

Head of Section

D ET NORSKE VERlT AS


January 1999

PLANNED MAINTENANCE SYSTEM

BASIC CONDITIONS

Appendix to Approval PMS/DR-

The machinery survey arrangement is granted on the condition that the Rig's Chief Engineer or an other persons in charge of the maintenance is responsible for:

adherence to the approved systems for planned maintenance and function control - proper records of maintenance, machlnery functions, and control activities are kept on board, written in the

English language and are made available to the Society's Surveyor at all times on his request reference operating data for all essential machinery, are kept available on board a Surveyor is notified to carry out an annual review of machinery functions and maintenance a Surveyor is notified and his presence requested in case of sustained damage which may have significance for the availability of machinery functions.

The following surveys are to be carried out: Annual Survey of Planned Maintenance System This survey is required to prolong the validity of the approval of the granted survey arrangement. The normal procedure will be to carry out this survey in connection with the Annual Survey. See the Rules, Part 7, Chapter 2.

- Survey of Damages If machinery or equipment which is covered by class inspection sustains damages of such extent that they may be presumed to lead to Condition of Class, the rig is to be surveyed by a Surveyor to the Society. The survey is to be of the extent, which the Surveyor considers necessary for ascertaining the amount of damage.

- Survey of Repairs When machinery or equipment, which is covered by classification, is to be subjected to repairs of any significance, the work is to be carried out under supervision of the Surveyor according to the Rules applying to new constructions as far as these are applicable.

EXTENT OF ANNUAL SURVEY FOR PLANNED MAINTENANCE SYSTEM (SA PMS) - Review and evaluation of the past period's maintenance activities and experience - The items which have been subject to "main overhaul"/" class survey" under the Chief Engineer's supervision

during the last year shall be recorded as "passed survey" on Form No.CME 001. The "passed survey" date will be the date when the surveyor attend the rig for the annual inspection of the PMS records. This date will be noted in the inventory list Form No. 72.65a on board. A "print-out" of the maintenance work "main overhaul"/" class survey" carried out since the last annual survey to be handed to the attending surveyor. At the discretion of the Surveyor function test will be carried out on the items recorded as "passed survey" when practicable. At the discretion of the Surveyor spot checking of the control and monitoring systems for the machinery items and, when relevant, for the additional class notation EO/ECO, Drill/Drill(N) and Production equipment, will be carried out for the items recorded as "passed survey". If deemed necessary, due to evaluation of history documents or result of testing, the Surveyor may require opening and/or testing of machinery and equipment. In severe cases he will issue a Condition of Clasl? to compliance with the condition set forth for the survey arrangement.

FEES Tbe fee charged during the Annual PMS Survey will be 20% of the total current Scale of fee for Continuous Machinery Survey. For Continuous Machinery Survey and EO/ECO a discount of 15% will be credited. Until the rig has completed her present 5-year cycle; i.e. until the expiry date of the classification certificate is reached. The fee to be charged in accordance with our present routines, the number of items reported multiplied by the fee with a 15 % discount. Expenses in connection with travel and subsistence will be added.

DETNORSKE VERITAS

17


January 1999

11. Appendix E. Survey Arrangement Condition Monitoring SAJ\fpL NOTroBEONLy

E llSED SACM -07-1997

CONDITION MONITORING

This is to certify that

TIT "BLACK BIRD" - ID. NO. 01999

Owned/Managed by: OIL TRANSPORT & CO. A/S has been granted approval of a survey arrangement, Condition Monitoring, based upon the present Rules for Classification of Ships, Part 7 Chapter 2. "For machinery equipped with instruments making it possible to ascertain the condition of the machinery components, special approval may be made as to the extent and method of the survey".

EXTENT The following components are included in this survey arrangement:

Propulsion Machinery main turbine and reduction gear

Auxiliary Machineq 1 turbine driven main feedwater pump 1 electric motor driven main feedwater pump 1 electric motor driven auxiliary feedwater pump 1 turbo-generator 1 turbine driven ballast water pump 4 turbine driven cargo oil pumps

CONDITIONS OF APPROVAL The conditions on which the Approval is granted are given in an Appendix to this Approval. The approval further assumes that:

Surveyor is notified and his presence requested in case of sustained damage which may have significance for the availability of machinery functions. An annual review of the machinery covered by this agreement, their functions and maintenance, is to be made by a Surveyor to the Society.

VALIDITY OF APPROVAL The procedure is valid until cancelled in writing. However, the Society may cancel the agreement immediately if it is evident that the basic assumptions are not adhered to or the relevant Rules of the Society are not complied with. The procedure is automatically cancelled in the case of sale or change of management of the ship. The Owners may at any time revert to another established survey procedure, upon written request.

H0Vik/Oslo,

for DET NORSKE VERITAS A/S

Head of Section

DETNORSKE VERITAS


January 1999

CONDITION MONITORING

The survey arrangement is granted on the folJowing conditions:

1. CONTROL AND MEASUREl\fENTS

Appendix to Approval No. SACM-07-1997

1.1 Control and measurements are to be carried out in accordance with instructions specified in the manual -"Instruction Guidelines". The results of measurements are to be entered on the forms specified in the manual, chapters 3 and 4.

1.2 The forms, which cover the registration and report procedure, are to be filed on board. The Chief Engineer is to sign and date the reports in accordance with the actual progress of the control and measurements carried out. Copies of the report forms, correctly completed are to be forwarded to Det Norske Veritas A/S, Hevik, as required by the "Instruction Guidelines".

1.3 For Owner/Manager duties in connection with sustained damage, reference is made to "Rules for Classification of Steel Ships".

2. SURVEYS

2.1 The agreement does not entail any change in the Renewal Survey period.

2.2 Renewal survey A renewal survey for condition monitoring to be carried out at the end/beginning of each five-year period starting from the date where the reference measurements were established. The surveys and measurements required shall be carried out according to the procedures described in the manual, chapters 3 and 4. Additional surveys and measurements may be required as deemed necessary by the Surveyor. Until further notice, a renewal survey of the condition monitoring system, at the end/beginning of each five year interval, is to be requested through Det Norske Veritas A/S, H0Vik.

2.3 Annual survey An annual survey is to be carried out by a Surveyor. This survey is required to prolong the validity of the approval of the granted survey arrangement. The Surveyor is to check that the control and measurements have been carried out in accordance with instructions in the manual, and that the registration on the pertinent form has been duly filled in. When accepted, the forms will be signed by the Surveyor. The normal procedure will be to carry out this survey in connection with the Annual Survey (AS) as required in the Rules, Part 7 Chapter 2.

2. 4 Survey of damages If machinery or equipment which is covered by class inspection sustains damages of such extent that they may be presumed to lead to a Condition of Class the damage is to be surveyed by a Surveyor to the Society. The survey is to be of the extent, which the Surveyor considers necessary for ascertaining the amount of damage.

DETNORSKE VERITAS

19

20 Classif!cation Notes No. 10.1

January 1999

Page2

2.5 Survey of repairs When machinery or equipment, which is covered by classification, is to be subjected to repairs of any significance, the work is to be carried out under supervision of the Surveyor according to the Rules applying to new constructions as far as these are applicable.

3. CONDITION OF CLASS

3.1 If any machinery defects occur, the Society may issue a Condition of Class regarding surveys and repairs according to the Rules.

3.2 If the control program is not followed as specified, the Society may issue a Condition of Class regarding surveys, performance tests, etc. as considered necessary to verify condition of the machinery.

3 .3 If any instrumentation defects or registration errors occur, without any defect indications of the machinery itself, the Society may issue a Condition of Class related to the modified machinery survey arrangement.

3.4 If the Owner/Manager wish to revert to another established machinery survey arrangement, the, Condition of Class may be deleted, and the special survey arrangement will be cancelled.

4. VALIDITY

4.1 The machinery survey procedure is valid until cancelled in writing by either party, generally with 12 months' notice. If it is evident that the basic assumptions are not adhered to or that the relevant Rules of the Society are not complied with the Society will immediately cancel the agreement.

4.2 The procedure is automatically cancelled in the case of sale or management change of the ship.

4.3 The Owner/Manager may at any time revert to another established survey procedure, upon written request.

S. COSTS AND FEES

The basic fees correspond to those valid for the relevant components/systems.

Expenses in connection with surveys, measurements, travel and subsistence will be charged according to the Society standard.

DETNORSKE VERITAS

Classification Note No. 10.t

January 1999

12. Appendix F. Tailshaft Monitoring

TMON-1999

T AILSHAFT MONITORING

This is to certify that

MIT "BLACK BIRD" - ID. NO. 01999

has been granted an alternative survey arrangement for the tailshaft based on condition monitoring, implying up to 15 year intervals between tailshaft withdrawals.

CONDITIONS The conditions for continuance of this arrangement are laid down in the Tailshaft Monitoring Record File on board.

V ALIDJTY OF APPROVAL This alternative survey arrangement is valid until cancelled, in writing, by the Society, generally with 12 months notice. 111e cancellation can be made with immediate effect, if it is evident that the conditions are not adhered to. The Owners may at any time revert to the nonnal survey arrangement in accordance with the present Rules for Classification of Ships, Part 7 Chapter 2.

H0Vik/Oslo,

for DET NORSKE VERIT AS AS

Head of Section

DET NORSKE VERITAS

21

22

13. Appendix G. Guideline for Stern Tube Lubrication Oil Analysis

13.1 Scope This appendix is based on an extract of the recommended procedure for the determination of contents of metals and other contaminants in shaft lubricating oil, worked out during the 32°d session of the IACS working party on. engines.

13.2 General

The documentation on lubrication oil analysis is to be available onboard. Each analysis, to be performed by an appropriate method, should include the minimum parameters as listed:

• Water contents • Chloride contents • Contents of bearing metal particles

13.3 Sampling Procedure Oil samples should be taken under service conditions, i.e. with a rotating shaft and the system at service temperature. The samples are to be taken from the same agreed position in the system that should be positively identified. These samples, unless supervised by a surveyor, are to be collected and identified by the Chief Engineer.

13.4 Metal Analysis and Content Values

The metal and water content values should be considered taking into account the type of seals used, the lubricating oil quality and the chemical composition of the bearing material.

It is important to have a number of sequential analyses in order to observe any trends taking place.

DETNORSKE VERITAS

Classification Notes No. IO.I

January 1999

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