CARGO HATCH COVERS

PROGRAM AND TECHNIQUE OF COMMISSIONING TESTS

B616-266.00-200

Nikolaev 2007

Rev Sheet Docum N Sign. Data

Design. Contr.

Chief of sec. Inspect. Approv.

B616-266.00-200 CARGO HATCH COVERS 1,2 PROGRAM AND TECHNIQUE OF

COMMISSIONING TESTS NIKOLAEV DESIGNING CENTRE

Letter Sheet Sheets 2 9

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Contents Sheet 1. Object and purpose of tests 3 2. General provisions 3 3. Safety precautions 4 4. Technique of test 4 5. Inspection and control check 6 Enclosure 1. List of testing instruments 7 Enclosure 2. Table of measurements of parameters when hatch covers testing 8 Enclosure 3.Table of measurements of electrical parameters 9

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1. OBJECT AND PURPOSE OF TESTS. 1.1 The present Program and Technique provides the scope of acceptance tests of the

cargo hatch covers manufactured in accordance with drawings B616-266.00-204, B616-266.00-205 and assembled onboard a ship of the B616 project.

1.2 The tests are acceptable and should be carried out with the purpose of compliance of

the cargo hatch covers to the Technical Specification and designing documentation. 1.3 The cargo hatch covers to be delivered aboard to be tested wholly completed in

accordance with documentation ( see dwg. 616-266.00-200).

2 GENERAL PROVISIONS

2.1. The tests are to be carried out on board a ship in Register Inspectors presence on the strength of the following documents: 2.1.1. Approved Program of the cargo hatch covers tests; 2.1.2. Present approved Technique; 2.1.3. Notice about readiness of the hatch covers to be tested; 2.2. Prior to the test the Shipyard through its responsible Commissioner should submit to the Commission the following documents: 2.2.1. Notice of the Shipyards Quality Control Department about acceptance of hatch covers assembly and their check in operation. 2.2.2. Set of the design documentation taken into account all alternations put in during manufacturing the cargo hatch covers; 2.2.3. Act of hatch cover flap weighing; 2.2.4. Certificates or results of chemical analyses on hatch cover main parts materials: sections, power and idle hinges, hatch dogs, levsers, brackets, axles as well on used grease and working liquid; 2.2.5. Means of measurements with acted acceptance stamps; 2.2.6. Operation Manual 616-266.00-200 2.2.7. Service documentation on installed hydraulic and electrical equipment; 2.2.8. Act of hydrodrive washing; 2.2.9. Table of measurements of squeezing values of packing rubber when hatch covers are dogged down, made in accordance with 5.9862-81; 2.2.10. Act of testing of the hydrodrive on leakage by test pressure of 1,25 nominal. 2.2.11. Normative documentation: 5.9862-81 and 5.2263-78. 2.2.12. Results of preliminary tests. 2.3. After each type of testing it should be carried out the visual inspection of main parts, assemblies and details of the hold hatch covers. In case of finding the defects, the latter should be repaired following which the tests should be continued.

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2.4. During tests it is carried out the log book and filled up tables (see Enclosures), in which the progress of tests are fixed, readings of instruments are written down as well as all comments arisen during tests. 2.5. Hatch covers should be submitted to the Commission after applying primering; 2.6. Preparation of the hatch covers to operate and operation of the hatch covers during testing should be carried out in accordance with the Operation Manual as well as the present approved Technique. 2.7. Having been got the satisfactory test results the representative of the Register should sign a certificate in the List of certificates.

3. SAFETY PRECAUTIONS

3.1. Only persons certified by the skilled commission of the Shipyard on knowledge of structures, principle of operation, safety precautions and been able to control them in accordance with the maintenance and operation manual, could be accepted to control devices. 3.2. To comply with safety precautions provided by the Operation Manual 616-266.00-200 3.3. To provide the personnel safety carrying out some works on maintenance, testing or repair of the hatch covers it is necessary to have both electrodrive and electrical system de-energized. Having been de-energized the electrical power supply, it is necessary to hang up nameplates with inscription DO NOT SWITCH ON! PERSONS ARE OPERATING!. 3.4. When arising emergency situation during operation of the hatch cover in accordance with location of operator, it is necessary additionally to be guided by instructions laid in the Requirements of safety precautions produced to general arrangement, gears and equipment of sea-going ships 1.81.01-87, as well as conforming to requirements P 5.9862-81 and P 5.0241-78. 4. TECHNIQUE OF TEST 4.1. Check of submitted documentation. 4.1.1. Commision should check the completeness of the submitted design and operational documentation. 4.2. Visual inspection and checks before testing. 4.2.1. Before testing to be carried out preparation for operation of the hatch covers in accordance with 616-266.00-200, in so doing: 4.2.1.1. It is necessary to check the electrical circuits insulation resistance: 1) Resistance of insulation of motor windings to be checked with a megohmmeter for a voltage of 500 V, and control circuits megohmmeter for a voltage of 100V; 2) Resistance of insulation of motor windings to be not less than 5 MOh, and control

circuits not less than 1 MOh. 4.2.1.2. It is necessary to check the throttle valves adjustment in accordance with the documentation of the hydroequipment Supplier.

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4.3. Testing of hatch covers in operation. 4.3.1. The tests of the hatch covers are carried out with the purpose of compliance of the technical characteristics to given ones as well as of check of interaction and serviceability of all main parts. 4.3.2. The test are carried out after complete assembling aboard at being ships heel and trim. 4.3.3. Hatch covers operation check should be carried out by complete opening and closing of all hatches up to position CLOSED DOWN. In so doing the number of openings-closings should be not less than three. The hatch covers tests to be carried out by the standard pump station operation. 4.3.4. When testing it should be checked: 1) correctness of interaction of parts and assemblies; 2) smooth movement of sections, absence of skewnesses and wedgings in joints;

3) operation of battening devices of the hatch covers; 4) structure and reliability of stopping of sections in the open position; 5) possibility of parts and assemblies greasing; 6) pressure in the hydrodrive by means of standard pressure gauge. The pressure should be

in the range from 1,0 to 25,5 P (from 10 to 255 kgf/ m2); 7) control both pumps and hydrodrives of the hatch covers is carried out from control units;

4.3.5. When opening or closing the hatches it is necessary to check safety of hatch cover operation when breaking pipelines, as well as the possibility of quick recovery of hydrodrive serviceability when emergency cases, for which purpose on one of leaf of hatch covers 1 or 2 it is necessary to be sure of smooth lowering of sections against coaming at sharp pressure drop in the hydrodrive. For this purpose it is necessary to open the standard throttle valves which connect the piston cavities of the hydrocylinders with discharge hydroline. (see B616-266.00-200, B616-266.00-200, item 2.24, 2.34, 2.44, 3.14, 3.24, 3.34). It is necessary to watch the working liquid level, do not permit the tank overfilling. After lowering leaf the valves to be closed. 4.3.6. When testing it is necessary to make the following measurements and take them in the table of the Enclosure 2:

1) time of opening of each hatch cover up to the position OPEN without regard to time of auxiliary operations ( batten up, preparation of a drive and so on );

2) time of closing of each hatch cover up to the position CLOSED without regard to time of auxiliary operations;

3) time necessary for batten down of each natch cover up to position BATTENED DOWN; 4) temperature of ambient air and oil in the hydrodrive; 5) maximum pressure in the hydrodrive when closing and opening of the hatch covers.

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4.3.7. When testing it is necessary to measure voltage, current intensity and required power of the electric motor. Results are taken in the Table of the Enclosure 3. 4.4. Watertightness tests. 4.4.1. Hatch covers N 1 and N 2 are watertight tested 4.4.2. Before testing the hatch covers are put in position BATTENED DOWN. 4.4.3. Sealings along hatch perimeter and between sections is subjected to testing. 4.4.4. The testing is carried out by hose watering in accordance with requirements of 5.2263-78. Watering should carry out from a distance of one to tree meters from the tested position. Minimum pressure in the barrel should be at least 200kPa (2kgf/cm2). Diameter of nozzle should be at least 12mm. Velocity of water jet should not more than 2 m/min. When watering it should not be drops or down-flows on inner surfaces of the hatch cover sealings. 4.5. Raintightness testing. 4.5.1. Before testing the hatch cover sections should close a hatch completely without

pressing by the battening device. 4.5.2. The testing is carried out by hose watering of sections. Velocity of water jet should not more than 2 m/min. In so doing the water jet should be directed up vertically and water should fall on a section scattered making when falling the downpour imitation. During testing there should not be some water ingresses inside the hold.

5. INSPECTION AND CONTROL CHECK.

5.1. When cargo hatch cover tests completed, if necessary, it is carried out the partial dismantling of assemblies for the purpose of determination of technical condition after tests. The scope of inspection is determined by the Commission. Results of inspection should be taken into the Protocol. . 5.2. Upon completion of inspection it is necessary to carry out the control check of hatch covers in operation. In so doing the scope of the control check is determined by the commission.