Surveys of General Dry Cargo Ships - Hull

(v) The internal and external condition of the tanks and associated structure are found satisfactory by the surveyor at the time of the overall and close up survey.

(b) The minimum requirements for thickness measurements are given in Table I 2 -7. The extent of thickness measurements at those areas of substantial corrosion in cargo area length is given in Table I 2-8.

2.11.4 Special survey - cargo area equipment

In addition to the requirements of the cargo system and pertinent safety devices stipulated in 2.11.2, the following items are to be examined:

(a) Cargo and ballast piping systems including valves and fittings, are to be inspected for corrosion, as deemed necessary by the Surveyor. Subsequently a pressure test is to be carried out.

(b) Cargo stripping and ballast pumps are to be examined. Pressure relief valves of pumps are to be function tested.

(c) Pressure/vacuum valves of cargo tanks are to be function tested and are to be opened up and adjusted, if deemed necessary by the Surveyor.

(d) Tank venting systems are to be examined. Flame arresters are to be opened up as far as necessary, and cleaned.

(e) Cargo tank heating systems are to be examined and pressure tested to 1.5 times the operating pressure.

(f) The bilge systems of pump rooms are to be examined and tested.

(g) All ventilation systems in cargo areas, including portable fans, are to be examined and function tested.

(h) The following equipment is to be function tested:

(i) Level indicators of cargo tanks.

(ii) Liquid level alarms.

(iii) Overflow controls.

(iv) Pressure and temperature alarms.

(v) Remote control systems of cargo pumps.

(vi) Sampling arrangements for cargo tanks, if fitted.

(vii) Inert gas systems, see 2.9.2.

2.11.5 Special survey  machinery

In addition to the special surveys of the ship's machinery as required in 2.7.6 and the inspections and testing as per 2.11.2(d), the protection devices of electric motors in gas dangerous spaces and zones are to be tested.

2.12 Surveys of General Dry Cargo Ships - Hull

These requirements apply to general dry cargo ships of 500 gross tonnage and above.

2.12.1 Annual Survey (a) General

(i) The due range of Annual Survey is to be in accordance with the applicable requirements of 2.5.

(ii) The survey is to consist of an examination for the purpose of ensuring, as far as practicable, that the hull, hatch covers, coamings and piping are maintained in a satisfactory condition.

(b) Examination of the hull

(i) Examination of the hull plating and its closing appliances as far as can be seen.

2.12 Surveys of General Dry Cargo Ships - Hull

(ii) Examination of watertight penetrations as far as practicable.

(c) Hatch covers and coamings

(i) Checking that no unapproved changes have been made to the hatch covers, hatch coamings and their securing and sealing devices since the last survey.

(ii) Where mechanically operated steel covers are fitted, checking the satisfactory condition of:

(1) Hatch covers; including Close-up Survey of hatch cover plating;

(2) Tightness devices (gaskets, gaskets lips, compression bars, drainage channels );

(3) Clamping devices, retaining bars, cleating, chain or rope pulleys;

(4) Guides, guide rails, track wheels and stoppers, etc.;

(5) Wires, chains, gypsies, tensioning devices;

(6) Hydraulic system essential to closing and securing; and (7) Safety locks and retaining devices.

(iii) Where portable covers, wooden or steel pontoons are fitted, checking the satisfactory condition of:

(1) Wooden covers and portable beams, carriers or sockets for the portable beams, and their securing devices;

(2) Steel pontoons, including close-up survey of hatch cover plating;

(3) Tarpaulins;

(4) Cleats, battens and wedges;

(5) Hatch securing bars and their securing devices;

(6) Loading pads/bars and the side plate edge;

(7) Guide plates and chocks; and

(8) Compression bars, drainage channels and drain pipes (if any).

(iv) Checking the satisfactory condition of hatch coaming plating and their stiffeners including close -up survey.

(v) Random checking of the satisfactory operating of mechanically operated hatch covers is to be made including:

(1) Stowage and securing in open condition;

(2) Proper fit and efficiency of sealing in closed condition; and

(3) Operational testing of hydraulic and power components, wires, chains and link drives.

(d) Suspect Areas identified at previous special or intermediate surveys are to be overall and close -up surveyed. Thickness measurements are to be taken of the area of Substantial Corrosion and the numb er of thickness measurement is to be increased to determine the extent of Substantial Corrosion as deemed necessary by the surveyor.

(e) Examination of cargo holds

Examination of cargo holds for annual survey of general dry cargo ships is to be carried out as given in Table I 2-10.

(f) Examination of ballast tanks

Examination of ballast tanks is required as a consequence of the results of the special survey and intermediate survey. When considered necessary by the Surveyor, or where extensive corrosion exis ts, thickness measurements are to be carried out. If the results of these thickness measurements indicate that Substantial Corrosion is found, then the number of thickness measurements is to be increased to determine the extent of Substantial Corrosion as deemed necessary by the surveyor.

(g) When thickness measurements as stated in (d), (e) and (f) above, indicate Substantial Corrosion, the number of thickness measurements is to be increased to determine the extent of Substantial Corrosion.

Table I 2-16 may be used as guidance for additional thickness measurements.

(h) Randomly examine and test the water level detectors and their alarms for single hold dry cargo ships.

2.12 Surveys of General Dry Cargo Ships - Hull

2.12.2 Intermediate survey (a) General

(i) Due range of intermediate survey is to be in accordance with the applicable requirements of 2.6.

(ii) At each intermediate survey, in addition to the requirements of the annual survey, the foll owing items are to be surveyed.

(iii) For general dry cargo ships exceeding 15 years of age, the requirements of the intermediate survey are to be to the same extent as the previous special survey as required in 2.12.3. However, an under water survey may be considered as equivalent in lieu of the requirements of 2.12.3(a)(vii) and pressure testing of ballast tanks and cargo holds used for ballast water, as applicable, is not required unless deemed necessary by the attending Surveyor.

(b) Examination of ballast tanks

Examination of ballast tanks for intermediate survey of general dry cargo ships is to be carried ou t as given in Table I 2-11.

(c) Examination of cargo holds

Examination of cargo holds for intermediate survey of general dry cargo ships is to be carried out as given in Table I 2-12.

2.12.3 Special survey (a) General

(i) The due range of special survey is to be in accordance with the applicable requirements of 2.7.

(ii) A survey planning meeting is to be held prior to the commencement of the survey.

(iii) The special survey is to include, in addition to the requirements of the annual survey, examination, tests and checks of sufficient extent to ensure that the hull and related piping is in a satisfactory condition.

(iv) All cargo holds, salt water ballast tanks including double bottom tanks, pipe tunnels, cofferdams and void spaces bounding cargo holds, decks and outer hull are to be examined as given in Table I 2-13. This examination is to be supplemented by thickness measurement and testing as deemed necessary, to ensure that the structural integrity remains effective. The examination is to be sufficient to discover Substantial Corrosion, significant deformation, fractures, damages or other structural deterioration.

(v) All piping systems within the above spaces are to be examined and tested under working conditions to ensure that the condition remain satisfactory.

(vi) The survey extent of ballast tanks converted to void spaces is to be specially considered in relation to the requirements for ballast tanks.

(vii) A survey in dry dock is to be a part of the special survey.

(b) Tank protection

(i) Where provided, the condition of the corrosion prevention system of ballast tanks is to be examined.

For tanks used for salt water ballast, excluding double bottom tanks, where a protective coating is found in Poor condition and it is not renewed, where a soft or semi-hard coating has been applied, or where a protection coating was not applied from the time of construction, the tank in question is to be examined at annual intervals.

(ii) When such breakdown of coating is found in salt water ballast double bottom tanks and it is not renewed, where a soft or semi-hard coating has been applied, or where a protective coating was not applied from the time of construction, the tank in question is to be examined at annual intervals.

When deemed necessary by the Surveyor, or where extensive corrosion exists, thickness measurements are to be carried out.

(iii) Where the protective coating in spaces is found to be in Good condition, the extent of close-up surveys and thickness measurements may be specially considered.