Chapter 2 Survey Requirements of Steel Ship
2.16 Classification Survey of Ships not Built under Survey
The requirements of the intermediate survey are to the same extent as the previous special survey.
However, internal examination of fuel oil tanks and pressure testing of all tanks are not required unless deemed necessary by the attending Surveyor.
(iii) Double Skin Bulk Carriers 15 < age
(1) The requirements of the intermediate survey are to the same extent as the previous special survey. However, internal examination of fuel oil tanks and pressure testing of all tanks are not required unless deemed necessary by the attending Surveyor.
(2) A survey in dry dock is to be part of the intermediate survey.
(iv) Minimum requirements of overall and Close-up survey and thickness measurements at intermediate survey are to be surveyed as Table I 2-26 for double skin bulk carriers.
2.15.3 Special Survey
(a) In addition to the requirements of annual surveys in 2.15.1, following items are also to be carried out:
(i) All cargo holds, ballast tanks, including double bottom and double side tanks, pipe tunnels, cofferdams and void spaces bounding cargo holds, decks and outer hull are to be examined.
(ii) All piping systems within the above spaces are to be examined and operationally tested to working pressure.
(iii) Bottom survey in dry dock is to be part of the special survey.
(iv) An overall survey of all tanks and spaces is to be carried out. Fuel oil tanks in cargo length area are to be surveyed as Table I 2-22.
(v) Minimum Close-up survey is to be surveyed as Table I 2-23 for double skin bulk carriers, excluding ore carriers and as Table I 2-24 for ore carriers, respectively.
(vi) Minimum thickness measurements are to be carried out as Table I 2-25.
(vii) All boundaries of water ballast tanks, deep tanks and cargo holds used for water ballast within the cargo length area are to be pressure tested. For fuel oil tanks, only representative tanks are to be pressure tested.
2.15.4 Extended thickness measurements is to be increased in accordance with Table I 2-27 when considered necessary by the surveyor, or where substantial corrosion exists in each survey.
2.16 Classification Survey of Ships not Built under Survey
2.16.1 The following drawings and documents, necessary for classification purpose, are to be submitted as far as practicable together with the application for classification:
(a) Hull
(i) General arrangement.
(ii) Mid-ship section.
(iii) Scantling profile and deck plans.
(iv) Shell expansion.
(v) Capacity plan.
(vi) Piping and pumping diagrams.
(vii) Rudder and stern frames.
(viii) Data of chain cable and anchor.
(ix) Lines and hydrostatic curves (if freeboard assignment is required).
(x) Lumber storage plan (if timber freeboard assignment is required).
(xi) Loading and stability information (i.e. loading manual).
(xii) Outfitting arrangement of ship's side fittings.
(xiii) Inert gas system (if required to be installed).
(xiv) COW system (if required to be installed).
2.16 Classification Survey of Ships not Built under Survey
(b) Machinery
(i) Engine room arrangement.
(ii) Piping system in engine room.
(iii) Detail and arrangement of propulsion shafting.
(iv) Machinery particulars.
(v) General arrangement of electric equipment.
(vi) Electric wiring diagram of power, lighting and interior communication system.
(vii) Electric equipment particulars.
(viii) Main switchboard.
(c) CAS/CAU/CAB
(i) Machinery arrangement plans showing location of control stations in relation to controlled units.
(ii) Arrangements and details of control consoles including front view, installation arrangements together with schematic diagrams for all power, control and monitoring systems including their functions.
(iii) Kinds and sizes of all electrical cables and wiring associated with control systems including voltage rating, service voltage and currents together with overload and short circuit protecti on.
(iv) Schematic plans of hydraulic and pneumatic control systems together with all interconnections, piping sizes and materials including working pressures and relief valve settings.
(v) Description of all alarms and emergency tripping arrangements, functional sketches or description of all special valves, actuators, sensors and relays.
(vi) Schematic plans and supporting data of fire protection and extinguishing systems, including fire detection and alarm system, bilge high water level alarms.
(d) Cargo refrigerating machinery and installations
(i) General arrangement of the insulated chamber in elevation and plan.
(ii) Drainage arrangement and detail of non-return trap.
(iii) Arrangement of air ducts, fan coolers and thermometers.
(iv) General arrangement of the refrigerating machinery.
(v) Piping diagram of primary and secondary refrigerant systems including full particulars of safety devices, valves and pipes.
(vi) Electric wiring diagram.
(vii) The log book of the refrigerating machinery for the preceding years is to be submitted for investigation.
(viii) Weights and descriptions of cargoes required to be cooled down in each chamber.
(ix) Proposed time required for cooling down.
(x) Initial temperature at which the cargo is to be loaded.
(xi) Carrying temperature of the cargo in refrigerated chamber.
(xii) Proposed air circulation and fresh air quantity required to cool down refrigerated chamber.
2.16.2 Ships without classification
For the ships which have not been classed with any other Classification Society, all surveys to the extent as specified in the Rules, are to be carried out by the Surveyor who is to take into account the age, the standard of construction, the past maintenance, and the present status of the ships concerned.
2.16.3 Ships with classification
If the ship keeps the Class of another recognized Classification Society with sufficient status, in general, a survey to the extent of an intermediate survey is to be conducted except the ship being within 3 months of the due date of special survey. Some intermediate survey items may be omitted by the Surveyor in view of the ship's condition. In such case, the period of class is to remain as assigned by the previous Classification Society.
2.16 Classification Survey of Ships not Built under Survey
2.16.4 Subsequent surveys
Subsequent surveys are to be carried out as in the case of ships built under survey.
2.16 Classification Survey of Ships not Built under Survey
Input:
Drawings, Reports, Acceptable Corrosion Allowance
Design Related Risk
Collection of information
Corrosion Damage Similar Ship where Available
Corrosion Damage This Ship
Coating Condition Anodes Condition Usage of Tanks
Present Areas where Damage has been Found and Risks Considered High. Mark Sketches or Drawings
Hull Damage:
General Experience Analyse Hull Damage for Similar Ships Where Available Analyse:
Hull Damage This Ship
Survey Plan
Survey
Locations for Thickness Measurement and Close-up Survey Coating Condition Anode Condition Usage of Tanks
Corrosion Risk
Acceptance by Administration
Fig. I 2-1
Technical Assessment & The Survey Planning Process
2.16 Classification Survey of Ships not Built under Survey
level c
level a
Fig. I 2-2
Ships without Lower Stool
level c
level b
Fig. I 2-3
Ships with Lower Stool
2.16 Classification Survey of Ships not Built under Survey
Fig. I 2-4
Close-Up Survey and Thickness Measurement Areas
2.16 Classification Survey of Ships not Built under Survey
Fig. I 2-5
Close-Up Survey and Thickness Measurement Areas
Ordinary Transverse Frame in Double Skin Tank
2.16 Classification Survey of Ships not Built under Survey
Table I 2-1A
Minimum Requirements for Internal Examination at Hull Special Surveys
Spaces andTanks (1),(2),(3)
SS No. 1 (Age 5)
SS No. 2 (5 < Age 10)
SS No. 3 (10 < Age 15)
SS No. 4 (Age > 15) Fuel oil bunker tanks
- Engine room None None One One
- Cargo area None One Two(4) Half, minimum 2(4)
Lube oil None None None One
Fresh water None One All All
Other spaces:
1. All spaces including holds and their 'tween decks where fitted; double bottom, deep, ballast, peak and cargo tanks; pump rooms, pipe tunnels, duct keels, machinery spaces, dry spaces, cofferdams and voids are to be internally examined including the plating and framing, bilges and drain wells, sounding, venting, pumping and drainage arrangements.
2. Internal examination of fuel oil, lube oil and fresh water tanks is to be carried out in accordance with this Table above.
3. Engine room structure is to be examined. Particular attention is to be given to tank tops, shell plating in way of tank tops, brackets connecting side shell frames and tank tops, and engine room bulkheads in way of tank top and bilge wells. Particular attention is to be given to the sea suctions, sea water cooling pipes and overboard discharge valves and their connections to the shell plating. Where wastage is evident or suspect, thickness measurements are to be carried out, and renewals or repairs made when wastage exceeds allowable limits.
4. For spaces used for salt water ballast, excluding double bottom tanks, if there is no protective coating, soft or semi-hard coating, or Poor protective coating condition and it is not renewed, maintenance of class is to be subject to the spaces in question being internally examined at annual intervals. Waiver of internal examination at annual intervals for tanks of 12 m3or less in size, with soft or semi-hard coating, may be considered.
5. When such conditions are found in salt water ballast double bottom tanks, maintenance of class may be subject to the spaces in question being internally examined at annual intervals.
6. Hatch covers and coamings are to be examined to verify that no unapproved changes have been made, that hatch covers are structurally sound and weathertight, and where mechanically operated steel covers are fitted, satisfactory operation is to be verified.
Notes:
(1) Tanks of integral (structural) type.
(2) If a selection of tanks is accepted to be examined, then different tanks are to be examined at each special survey, on a rotational basis.
(3) Peak tanks (all uses) are subject to internal examination at each special survey.
(4) One deep tank is to be included, if fitted.
2.16 Classification Survey of Ships not Built under Survey
Table I 2-1B
Additional Requirements of Internal Examinations for Oil Tankers
Special Survey Tanks and Spaces subject to anExamination Note
All special survey
1. All cargo tank
For oil tankers, combined cargo/ballast tanks, if any, are to be examined carefully taking account of ballast history and the extent of the corrosion prevention system provided.
For oil tankers, condition of the inner surface of the bottom plating of the tank is to be examined in order to ascertain that the there is no excessive pitting of the plating.
For oil tankers, bell mouths of the cargo suction pipes are to be removed to enable examination of the bottom plating of the tank and bulkheads in that vicinity as considered necessary by the Surveyor.
2. All tanks and spaces adjacent to cargo tanks (ballast tanks, pump rooms, pipe tunnels, cofferdams and void spaces)
For oil tankers and ships carrying dangerous chemicals in bulk, an internal examination of ballast tanks is to be carried out at annual intervals, where a protective coating is found in Poor condition, and it is not renewed or where a protective coating has not been applied to the tanks.
An internal examination of pump room is to be carried out carefully paying attention to the sealing arrangements of all penetrations of bulkheads, ventilating arrangements, foundations and gland seals of pumps.
Table I 2-1C
Additional Requirements of Internal Examinations for Bulk Carrier
Special Survey Tanks and Spaces subject to anExamination Note
All special surveys
1. All cargo holds
Combined cargo/ballast tanks, if any, are to be examined taking account of ballast history and the extent of the corrosion prevention system provided.
2. All tanks and spaces adjacent to cargo holds (ballast tanks, pipe tunnels, cofferdams and void spaces)
For ballast tanks where a protective coating is found in Poor condition, and it is not renewed or where a protective coating has not been applied, an internal examination is to be carried out at annual intervals.
Ballast tanks converted to void spaces are to be examined applying the provisions for ballast tanks correspondingly.
2.16 Classification Survey of Ships not Built under Survey
Table I 2-2A
Requirements of Pressure Tests for Cargo Ships
Special Survey (SS) Tanks subject to Pressure Test
SS No.1 (Age ≤ 5)
1. All water tanks including cargo holds used for ballast and all cargo tanks
Special consideration may be, however, given to limit testing of fresh water tanks to representative tanks provided that, after an internal and external examination of the tanks, the Surveyor is satisfied with the condition of the tanks.
2. All fuel oil tanks
Special consideration is to be given to limit testing of fuel oil tanks to representative tanks provided that, after an internal and external examination of the tanks, the Surveyor is satisfied with the condition of the tanks.
3. All lubrication oil tanks
Special consideration may be, however, given to limit testing of lubrication oil tanks to representative tanks provided that, after an external examination of the tanks, the Surveyor is satisfied with the condition of the tanks.
SS No.2
(5 < Age ≤ 10) 1. Same requirements as special survey No.1
SS No.3 (10 < Age ≤ 15)
1. All water tanks including cargo holds used for ballast and all cargo tanks 2. All fuel oil tanks
Special consideration is to be given to limit testing of double bottom tanks to representative tanks including one forward and one aft tank and of deep tanks to representative tanks provided that, after an internal and external examination of the tanks, the Surveyor is satisfied with the condition of the tanks.
3. All lubrication oil tanks
Special consideration is to be given to limit testing of lubrication oil tanks to representative tanks provided that, after an internal and external examination of the tanks, the Surveyor is satisfied with the condition of the tanks.
SS No.4 (Age > 15)
1. All water tanks including cargo holds used for ballast, all cargo tanks, all fuel oil tanks and all lubrication oil tanks
Table I 2-2B
Minimum Requirements to Tank Testing at Special Survey of Oil Tankers, Ore/Oil Ships and etc.
SS No. 1 (Age ≤ 5)
SS No. 2 (5 < Age 10) 1. All ballast tank boundaries 1. All ballast tank boundaries 2. Cargo tank boundaries facing ballast tanks, void
spaces, pipe tunnels, pump-rooms or cofferdams
2. All cargo tank bulkheads
2.16 Classification Survey of Ships not Built under Survey
Table I 2-2C
Requirements of Pressure Tests at Special Survey of Bulk Carriers
Special Survey (SS) Tanks subject to Pressure Test
SS No.1 (Age ≤ 5)
1. All boundaries of ballast tanks, deep tanks and cargo holds used for ballast within the cargo length area
2. Representative tanks for fresh water, fuel oil and lubrication oil within the cargo length area
3. All water tanks
Special consideration may be, however, given to limit testing of fresh water tanks other than tanks specified in 1. and 2. above to representative tanks provided that, after an internal and external examination of the tanks, the Surveyor is satisfied with the condition of the tanks.
4. All fuel oil tanks
Special consideration may be, however, given to limit testing of fuel oil tanks other than tanks specified in 2. above to representative tanks provided that, after an internal or external examination of the tanks, the Surveyor is satisfied with the condition of the tanks.
5. All lubrication oil tanks
Special consideration may be, given to limit testing of lubrication oil tanks other than tanks specified in 2. above to representative tanks provided that, after an external examination of tanks, the Surveyor is satisfied with the condition of the tank s.
SS No.2
(5 <Age ≤ 10) 1. As special survey No.1
SS No.3 (10 <Age ≤ 15)
1. All water tanks including cargo holds used for ballast 2. All fuel oil tanks
Special consideration may be, however, given to limit testing of double bottom tanks to representative tanks including one forward and one aft tank and of deep tanks to representative tanks provided that, after an internal and external examination of the tanks, the Surveyor is satisfied with the condition of the tanks.
3. All lubrication oil tanks
Special consideration may be, however, given to limit testing of lubrication oil tanks to representative tanks provided that, after an internal and external examination of the tanks, the Surveyor is satisfied with the condition of the tanks.
SS No.4 (Age > 15)
1. All water tanks including cargo holds used for ballast, all fuel oil tanks and all lubrication oil tanks
2.16 Classification Survey of Ships not Built under Survey
Table I 2-3A
Minimum Requirements for Thickness Measurements at Hull Special Surveys
SS No. 11. Suspect Areas throughout the vessel
2. A minimum of three transverse sections in way of cargo spaces within the amidships 0.5L(5)
3. Internals in forepeak tank and after peak tank
3. Internals in forepeak and after peak tanks
4. All cargo hold hatch covers and coamings (plating and stiffeners)
4. All cargo hold hatch covers and coamings (plating and stiffeners) 5. All exposed main deck plating full
length
6. Representative exposed
superstructure deck plating (poop, bridge, and forecastle deck) 7. Lowest strake and strakes in way of
'tween decks of all transverse bulkheads in cargo spaces together with internals in way(5)
8. All wind- and water strakes, port and starboard, full length 9. All keel plates full length. Also,
additional bottom plates in way of cofferdams, machinery space, and aft end of tanks
10. Plating of sea chests. Shell plating in way of overboard discharges as considered necessary by the attending Surveyor
Notes:
(1) Thickness measurement locations are to be selected to provide the best representative sampling of areas likely to be most exposed to corrosion, considering cargo and ballast history and arrangement and condition of protective coatings.
(2) Thickness measurements of internals may be modified at the discretion of the Surveyor if the protective coating is in Good condition.
(3) For vessels less than 100 meters in length, the number of transverse sections required at Special Survey No.
3 may be reduced to one, and the number of transverse sections required at Subsequent Special Surveys may be reduced to two.
(4) For vessels more than 100 meters in length, at Special Survey No. 3, thickness measurements of exposed deck plating within amidship 0.5 L may be required.
(5) For vessels without defined cargo spaces, thickness measurements are to be taken at the appropriate, most onerous locations selected to provide the best representative sampling of areas likely to be exposed to corrosion the most.
2.16 Classification Survey of Ships not Built under Survey
Table I 2-3B
Minimum Requirements for Thickness Measurements at Hull Special Survey of Oil Tankers, Ore/Oil Carriers and etc.
SS No. 1 4. Selected wind and water
strakes outside the cargo area
4. Selected wind and water strakes outside the cargo
6. Internals in peak tanks 6. Internals in peak tanks 7. Exposed superstructure
2.16 Classification Survey of Ships not Built under Survey
Table I 2-3C
Minimum Requirement for Thickness Measurement at Hull Special Surveys of Bulk Carriers
SS No. 1
2. Within the cargo length:
a. Two transverse section of deck plating outside line of cargo
5. Selected wind and water strakes outside the cargo
9. Internals in peak tanks 9. Internals in peak tanks 10. Exposed superstructure
2.16 Classification Survey of Ships not Built under Survey
Table 1 2-4A
Requirements of Additional Thickness Measurements for Cargo Ships in way of Substantial Corrosion
Structural Member Extent of Measurement Pattern of Measurement
Plating Suspect area and adjacent plates 5 point pattern over 1 square meter
Stiffeners Suspect area 3 measurements each in line across web and flange
Table I 2-4B
Requirements for Extent of Thickness Measurement in way of Substantial Corrosion at Hull Special Survey of Oil Tankers, Ore/Oil Carriers and etc. within the Cargo Tank Length (1/2)
Structural member Extent of measurement Pattern of measurement
Bottom Structure
1. Bottom plating
Minimum of 3 bays across tank including aft bay
Measurements around and under all bell mouths
5 point pattern for each panel between longitudinals and webs
2. Bottom Longitudinals Minimum of 3 longitudinals in each bay where bottom plating measured
3 measurements in line across flange and 3 measurements on vertically web
3. Bottom girders and brackets
At fore and aft transverse bulkhead bracket toes and in centre of tanks
Vertical line of single measurements on web plating with one measurement between each panel stiffener, or a minimum of three measurements
Two measurements across face flat 5 point pattern on girder/bhd brackets 4. Bottom transverse webs
3 webs in bays where bottom plating measured, with measurements at both ends and middle
5 points pattern over 2 square metre area Single measurements on face flat
5. Panel stiffening Where provided Single measurements
Deck Structure
1. Deck plating Two bands across tank Minimum of three measurements per plate per band
2. Deck longitudinals Minimum of 3 longitudinals each of two bays
3 measurements in line vertically on webs, and 2 measurements on flange (if fitted)
3. Deck girders and brackets
At fore and aft transverse bulkhead, bracket toes and in centre of tanks
Vertical line of single measurements on web plating with one measurement between each panel stiffener, or a minimum of three measurements
Two measurements across face flat 5-point pattern on girder/bulkhead brackets 4. Deck transverse webs
Minimum of two webs, with
measurements at middle and both ends of span
5-point pattern over about 2 square metre areas
Single measurements on face flat
5. Panel stiffening Where provided Single measurements
2.16 Classification Survey of Ships not Built under Survey
Table I 2-4B
Requirements for Extent of Thickness Measurement in way of Substantial Corrosion at Hull Special Survey of Oil Tankers, Ore/Oil Carriers and etc. within the Cargo Tank Length (2/2)
Structural member Extent of measurement Pattern of measurement
Structural member Extent of measurement Pattern of measurement