Section 3 Surveys

301. General

1. Units classed with the Society are to be subjected to the following surveys to maintain the classification.

(1) Special Surveys

(2) Intermediate Surveys

(3) Annual Surveys

(4) Docking Surveys

(5) Surveys of Propeller Shaft and Stern Tube Shaft, Etc.

(6) Boiler Surveys

(7) Continuous Surveys

(8) Alteration Survey

(9) Occasional Surveys

2. Damage, failure and repair

(1) Examination

Damage, failure, deterioration or repair to the unit or its elements which affects or may affects classification is to be submitted by the Owners or their representatives for examination by the Surveyor.

(2) Repairs

Where repairs to the unit or its elements which may affect classification are planned in ad- vance, a complete repair procedure, including the extent of the proposed repair and the need for the Surveyor's attendance, is to be submitted to and agreed upon by the Surveyor reasonably in

advance. Failure to notify the Society in advance of the repairs may result in suspension

of the

unit's classification until such time as the repair is redone or evidence is submitted to satisfy the Surveyor that the repair was properly carried out.

Note : The above applies also to repairs during voyage or on site.

The above is not intended to include maintenance and overhaul to hull, machinery and equip- ment in accordance with manufacturer's recommended procedures and established marine practice and which does not require the approval of the Society. However, any repairs as a result of such maintenance and overhauls which affects or may affect classification is to be noted in the unit's log and submitted to the Surveyors for use in determining further survey requirements as required by (1) above. All repairs found necessary by the Surveyor are to be completed to the Surveyor's satisfaction.

Guidance for Floating Liquefied Gas Units 2015 9

3. Continuous Surveys

(1) At the

system carried

request of the Owner and upon the Society's approval of the proposed arrangements, a of Continuous Surveys may be undertaken whereby the Special Survey requirements are out in regular rotation to complete all of the requirements of the particular Special

Survey within a 5-year period. Each part(item) surveyed becomes due again for survey approx- imately five(5) years from the date of survey. The due parts(items) are generally to be com- pleted each year. Continuous items that are three(3) months or more overdue at the time of Annual Survey attendance will be basis for the Annual Survey not to be credited and for non-

endorsement of the Certificate of Classification. Consideration may be given by the Society to an extension to complete survey items. If any defects are found during the survey, they are to be dealt with to the satisfaction of the Surveyor.

(2) Docking Survey or equivalent In-water Survey, as required by 304., may be performed at any time within the five-year Special Survey period, provided that all requirements of 305. are met and thickness measurements are taken when the unit is surveyed.

4. Lay-up and reactivation

(1) The Society is to be notified by the Owner that a unit has been laid-up. The surveys falling due during lay-up may then be held in abeyance until the unit reactivates. Lay-up procedures and arrangements for maintenance of conditions during lay-up may be submitted to the Society for review and verification by survey.

(2) The requirements for surveys on reactivation are to be specially considered in each case, with due regard given to the status of surveys at the time of the commencement of the lay-up peri- od, the length of the period and the conditions under which the unit has been maintained dur- ing that period.

(3) Units returning to active service, regardless of whether the Society has been informed previously that the unit has been in lay-up, will require a Reactivation Survey.

5. Survey Reports File

All survey reports and records of all abnormalities found are to be compiled into the Survey Report File that is to be kept onboard the unit at all times for reference during any survey. The records to be kept include, but are not limited to, the following:

(1) Approved Survey and Inspection Plan, as required by 204. 2.

(2) The updated status records of all class surveys

(3) The records of all abnormalities found that are to include all videos and photographic records

(4) The

records of all repairs performed on any abnormalities found and any further repetitive ab-

normalities found subsequent to the repairs

(5) Records of all corrosion prevention system maintenance, including records of all cathodic poten- tial readings taken, records of depletion of all sacrificial anodes, impressed current maintenance records, such as voltage and current demands of the system, coating breaks and the monitoring records of the steel material wastage in way of the coating break areas

(6) All classification survey reports pertaining to the unit

(7) All records of any findings of abnormalities by the crew personnel onboard, including all lea- kages in bulkheads and piping

(8) Reports of thickness measurements of the unit

(9) Reports of all NDE performed

6. Surveys using risk-based techniques

A properly conducted Risk-Based Inspection Plan or Reliability Centered Maintenance Plan may be credited as satisfying requirements of surveys for maintenance of class for the corresponding unit. The application of this requirements does not cover any statutory survey requirements that may ap- ply to the unit being considered. Although the Society is authorized to perform statutory surveys on behalf of some authorities, the Society is not in a position to alter or waive them. The Owner is to ensure that in developing the inspection plan or maintenance plan, due consideration is given to applicable requirements external to the Society.

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302. Annual survey

1. Due range

Annual Survey is to be carried out within 3 months before or after each anniversary date.

2. Hull and equipment

(1) Ship and barge type units

For ship and barge type units, at each Annual Survey, the weather decks, hull plating and their closing appliances together with watertight penetrations are to be generally examined as far as practicable and placed in satisfactory condition. The following documents, as applicable, are to be available onboard during Annual Surveys:

(a) General Arrangement

(b) Capacity Plan

(c) Hazardous Area Classification Plans

(d) List of Electrical Equipment

(e) Operations Manual

(f) Construction Portfolio

(g) Survey Reports File, as required by 301. 5

(2) Survey is to be in accordance with Ch 2, 302. 2. of Guidance for Floating Production Units, if applicable.

3. Fire protection and fire fighting systems

Fire protection and fire fighting systems is to be in accordance with Ch 2, 302. 3. of Guidance for Floating Production Units, if applicable.

4. Machinery and electrical equipment

(1) Annual Survey of machinery and electrical systems is mandatory for all types of units.

(2) Ship and barge type units

Survey for machinery and electrical equipment is to be in accordance with Pt. 1, Ch 2, 203. of

Rules for the Classification of Steel Ships, if applicable.

(3) Non self propelled unit

Machinery items installed consistent with the services of the installation are subject to a general examination and are to be placed in satisfactory condition.

(4) Self propelled unit

(A) Surveys of self propelled installations is to comply with applicable requirements of Pt 1, Ch 2, 203. of Rules for the Classification of Steel Ships.

(B) Thruster surveys, where installed, are to comply with the requirements of Pt 1, Annex 1-9

of Guidance relating to the Rules for the Classification of Steel Ships.

(5) Surveys of machinery that has been accepted for surveys based on preventative maintenance techniques are to comply with the requirements of Pt 1, Annex 1-8 of Guidance relating to the Rules for the Classification of Steel Ships.

(6) Enclosed hazardous areas, including ventilation, electric lighting, electric fixtures and in-

strumentation is to be examined.

(7) The integrity of explosion-proof equipment is to be verified.

(8) Corrosion protection systems are to be examined.

(9) Remote shutdown arrangements for fuel and ventilation equipment are to be examined and tested.

(10) Emergency control stations are to be examined and tested.

(11) Safety relief valves are to be externally examined and tested.

(12)

All machinery, pumps and pumping arrangements, including valves, cocks and pipes are to be

externally examined during operation.

(13) Preventative maintenance records are to be examined.

(14) Structure, piping, electrical systems and machinery foundations are to be for damage or deterioration.

5. Dynamic positioning systems (if relevant notations are assigned)

generally examined

Surveys of dynamic positioning systems are to comply with the requirements

Rules for the Classification of Steel Ships.

of Pt 9,

Ch 4 of

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6. Regasification systems

Survey for regasification systems are to be in accordance

for the Classification of Steel Ships as applicable.

7. Process systems(if relevant notation is assigned)

Survey for process systems are to be in accordance with

Production Units as applicable.

8. Loading and offloading system

with Pt 1 Ch 2 Sec 2, 204.3 of Rules

Ch 2 302. 6 of Guidance for Floating

(1) A general examination is to be performed on all electrical system, cargo piping and valves, ex- pansion joints and seals associated with loading and offloading system.

(2) All navigational aids are to be examined and functionally tested.

9. Import system and export system (if relevant notation is assigned)

Survey for Import system and export system are to be in accordance with Ch 2 302. 7 of

Guidance for Floating Production Units as applicable.

10. Additional survey items

Survey is to be in accordance with Pt 1, Ch 2, 204. 3. of Rules for the Classification of Steel Ships, if applicable.

303.

Intermediate Surveys

1. Due range

Intermediate Surveys are to be carried out either at the second or third Annual Survey or between these surveys.

2. Hull and equipment

(1) Ship and barge type units

Survey is to be in accordance with Ch 2, 303. 2. of Guidance for Floating Production Units, if applicable. At the approval for registration survey if documents for repairs, corrosion protection and survey method are submitted and approved by classification society, relevant sur- veys should be required.

3. Fire protection and fire fighting systems

At each Intermediate Survey, all the requirements of Annual Survey are to be complied with.

4. Machinery and electrical equipment

At each Intermediate Survey, all the requirements of Annual Survey are to be complied with.

5. Regasification systems

Survey for regasification systems are to be in accordance with Pt 1, Ch 2, 304. 3. of Rules for the Classification of Steel Ships as applicable.

6. Process system(if relevant notations are assigned)

At each Intermediate Survey, all the requirements of Annual Survey are to be

7. Loading and offloading system

At each Intermediate Survey, all the requirements of Annual Survey are to be

8. Import system and export system(if relevant notations are assigned)

At each Intermediate Survey, all the requirements of Annual Survey are to be

complied with. complied with.

complied with.

9. Additional survey items

Survey is to be in accordance with

Steel Ships, if applicable.

Pt 1, Ch 2, 304. 3. of Rules for the Classification of

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304. Special Surveys

1. Due range

(1) A Special Survey is to be completed within five(5) years after the date of build or after the crediting date of the previous Special Survey. The fifth Annual Survey must be credited as a requirement of the Special Survey. The interval between Special Survey may be reduced by the Society if it considered necessary.

(2) Special Survey may be commenced at the fourth Annual Survey and be continued with com- pletion by the fifth anniversary date. Where the Special Survey is commenced prematurely, the entire survey is normally to be completed within 15 months if such work is to be credited to the Special Survey.

(3) Special consideration may be given to Special Survey requirements in the case of units of un- usual design, in lay-up or in unusual circumstances. Consideration may be given for extensions of rule-required Special Surveys under exceptional circumstances.

2. Hull and equipment

Special Survey is to be in accordance with Ch 2, 304. 2. of Guidance for Floating Production Units, if applicable. However "(13) Thickness measurement" and "(14) Tank testing" of Pt 1, Ch 2,

403. 1. of Rules for the Classification of Steel Ships are to be applied instead of "(I) Close-up

Survey requirements", "(J) Thickness measurements requirements" and "(K) Tank testing" of Ch 2,

304. 2. of Guidance for Floating Production Units.

3. Fire protection and fire fighting systems

Special Survey is to include compliance with the Annual Survey requirements and to be in accord- ance with Ch 2, 304. 3. of Guidance for Floating Production Units, if applicable.

4. Machinery and electrical equipment

Special Survey is to include compliance with the Annual Survey requirements and to be in accord- ance with Ch 2, 304. 4. of Guidance for Floating Production Units, if applicable.

5. Inert Gas Systems

Surveys of inert gas systems are to comply with the requirements of Pt 1, Ch 2, Sec 5-2, Par 1

of Rules for the Classification of Steel Ships.

6. Dynamic positioning systems

Surveys of dynamic positioning systems are to comply with the requirements of Pt 9, Ch 4 of

Rules for the Classification of Steel Ships.

7. Regasification systems

Survey for regasification systems are to be in accordance with Pt 1, Ch 2, Sec 5-2, Par 3 of

Rules for the Classification of Steel Ships as applicable.

8. Process system(if relevant notations are assigned)

Surveys for process systems are to be in accordance with Ch 2, 304. 7 of Guidance for Floating Production Units as applicable.

9. Loading and offloading system

At each Special Survey, all the requirements of Annual Survey are to be complied with.

10. Import system and export system(if relevant notations are assigned)

Surveys for import systems and export systems are to be in accordance with

Guidance for Floating Production Units as applicable.

11. Additional survey items

Survey is to be in accordance with Pt 1, Ch 2, Sec 5-2, Par 3 of

Classification of Steel Ships, if applicable.

Ch 2, 304. 8 of

Rules for the

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305. Docking Survey

The underwater parts of a unit are to be examined at certain intervals. This examination may be conducted by In-water Survey in lieu of drydocking or, if necessary, a survey on drydock. During this survey, the Surveyors are to survey the unit, its structural condition, corrosion protection sys- tem, mooring system and(if classed) the loading and export systems.

1. Due range

(1) There is to be a minimum of two Docking Survey during each five-year Special Survey period.

One such Docking Survey is to be carried out in conjunction with the Special Survey. In all cases the interval between any two such Docking Surveys is not to exceed 36 months.

(2) Consideration may be given for extensions of rule-required Docking Survey under exceptional

circumstances. An In-water Survey may be required for such extensions.

2. Requirements of survey

(1) For ship type and barge type units, the following items are to be examined, as applicable:

The keel, stem, stern frame, rudder, propeller, and outside of side and bottom plating are to be cleaned as necessary and examined, together with bilge keels, thrusters, exposed parts of the stern bearing and seal assembly, sea chest, rudder pintles and gudgeons, together with their re- spective securing arrangements. All sea connections and overboard discharge valves and cocks, including their attachments to the hull or sea chests, are to be externally examined. All non- metallic expansion pieces in the sea-water cooling and circulating systems are to be examined both externally and internally. The stern bearing clearance or weardown and rudder bearing clearances are to be ascertained and reported on.

(2) Corrosion prevention system - underwater body

In addition to the above (1) requirements, the following are to be to be performed during all of the Docking Surveys(or equivalent In-water Surveys):

(A) Cathodic potential readings are to be taken from representative positions on the entire under- water body and evaluated to confirm that the cathodic protection system is operating within design limits.

(B) Sacrificial anodes are to be examined for depletion and placed in satisfactory condition, as considered necessary.

(C) Impressed current system anodes and cathodes are to be checked for damage, fouling by marine growth and carbonate deposits. The current and voltage demands of the system are to also be checked to ensure the system is functioning properly.

(D) Additional examinations are to be performed on the wind and water areas of the structures where coating breaks are evident. Thickness measurements in these areas may be required if

found necessary by the attending Surveyor.

(3) Mooring system

For mooring systems, the following are to be cleaned and examined, where applicable:

(A) The mooring anchor chain or cable tensions are to be measured and the end connections of

these components are to be examined. All mooring chains are to be generally examined for their entire lengths.

(B) Anchors, cables and their respective handling means are to be examined.

(C) The buoyancy tanks are to be cleaned and examined, if applicable.

(D) Chain and stopper assemblies are to be cleaned, examined and NDE performed, as consid- ered necessary by the Surveyor.

(E) Areas of high stress or low fatigue life are to be preselected, cleaned and NDE performed, if considered necessary.

(F) Scour in way of anchors or anchor piles is to be examined.

(G) Cathodic potential readings are to be taken from representative positions on the entire un- derwater structure of the mooring system to confirm that the cathodic protection system is operating within design limits.

(H) Highly stressed, high wear and tear areas of the mooring chain are to be closely examined and nondestructively tested, if considered necessary by the Surveyor. These include areas in way of the stoppers and sea bed touchdown areas.

(4) Import and export systems (if relevant notations are assigned)

For import systems, the following are to be cleaned and examined, where applicable:

(A) The entire riser system

(B) The arch buoyancy tanks including their structures and clamping devices.

14 Guidance for Floating Liquefied Gas Unit 2015

(C) The flexible riser, including all end flanges and bolting arrangements and spreader bars, if applicable.

(D) The entire export flexible system is to be examined for damage due to chafing and fatigue

fractures.

(E) Hoses designed and manufactured based on OCIMF standards are to be tested in accordance with the "OCIMF Guide for the Handling, Storage, Inspection, and Testing of Hoses in the Field".

3. In-water Survey

(1) For units with IWS notation in accordance with relevant requirements specified in Pt 1, Ch 2, 604. of Rule for the Classification of Steel Ships, an approved In-water Survey by a diver

may be considered equivalent to a Docking Survey, up

The In-water Survey Procedures in accordance with

to and including Special Survey No. 4.

Ch 2, Sec 3, 309. of Rules for

Classification of Mobile Offshore Drilling Units are to be submitted for review and approval

in advance of the survey.

This approved procedure is to be made available onboard. In addition, the inspection procedures are to also consist of the following:

(A) Scope of inspection

(B)

(C)

Procedure for divers to identify the exact location at which they are conducting their in- spection

Procedure for cleaning the marine growth for inspection purposes that is to include the ex- tent and location of the underwater cleaning

(D) Procedure and extent for measuring the cathodic potential readings in way of the structures

(E)

Procedure and extent for taking thickness measurements of the structures and NDE of crit- ical joints

(F) Qualifications of all divers conducting the inspection, NDE and thickness measurements

(G) The type of underwater video and photography, including means of communication, monitor- ing and recording

(H) For In-water Surveys in lieu of Docking Surveys associated with Special Survey, means are

to be provided to permit the opening up of all sea valves and overboard discharges for in- ternal examination. In addition, all Special Survey items related to the underwater portion of the hull or structure, including the thickness measurement requirements are to be dealt with during the In-water Survey.

(2) For each In-water Survey in lieu of Docking Survey after Special Survey No. 4, requests to

conduct an In-water Survey are to be submitted for consideration well in advance of the pro- posed survey. Approvals to conduct the In-water Survey in lieu of Docking Survey after Special

Survey No. 4 are to be made available onboard for the Surveyor's reference.

306. Tail Shaft and Tube Shaft Surveys

For Tail Shaft Surveys of self-propelled units, applicable requirements of Pt 1, Ch 2, Sec 7 of Rule for the Classification of Steel Ships are to be complied with. However, due to low run- ning hours on tail shafts of units, the interval between tail shaft surveys may be extended.

307. Boiler Surveys

Boiler Surveys are to comply with the requirements

Classification of Steel Ships.

of Pt 1, Ch 2, Sec 8 of Rule for the