Section 4 Auxiliaries and Piping Arrangement

401. Pressure pipes and pipe connections 【See Guidance】

1. Pipes, flanges, valves and pipe fittings and their joints subject to internal pressure are to have an adequate strength conforming to the service conditions.

2. Sleeve threaded joints are generally not to be used for the joints of direct connection of pipe length and flange-pipe connections which pipings are used for fuel oil, lubricating oil or other in- flammable oil systems.

402. Piping arrangement

Piping arrangements are to comply with the requirements in Pt 5, Ch 6 of the Rules for the Classification of Steel Ships. However, slip joints maybe acceptable subject to the approval of the Society.

403. Sea suction Valves and overboard discharge valves

Sea suction valves and overboard discharge valves are to be constructed and installed in accordance with the requirements in Pt 5, Ch 6, Sec 3 of the Rules for the Classification of Steel Ships.

404. Pneumatic system

1. Air reservoirs are to be provided with a sufficient drainage system.

2. Air compressors are to be provided with a relief valve to prevent the pressure from than 0.01 times above the maximum pressure in the cylinders.

3. In the case of water cooled air compressor, and where water jacket of compressors might be subjected to dangerous excessive pressure due to leakage into them from parts, safety device for overpressure is to be provided at their cooling space .

rising more and coolers

air pressure

4. Where air reservoirs can be isolated from the relief valves prescribed in Par 2 or air reservoirs are charged by hand air compressor only, they are to be provided with a pressure relief device to re- lease the pressure automatically in the event of fire.

5. Starting air piping systems for internal combustion engines are to be provided with non-return

74 Rules for the Classification of Steel Barges 2015

valves or other equivalent devices.

405. Fuel oil systems and lubricating oil systems

1. Arrangements for the storage, distribution and utilization of fuel oil and lubricating oil are to be such as to ensure the safety of the barge and persons on board.

2. Machinery spaces in which oil vapour is like1y to accumulate, are to be adequately ventilated.

3. Fuel oil systems are to be so arranged that defects and leakage can readily be observed, and the spaces in which the systems are installed are to be adequately illuminated.

4. Materials used for pipes, valves and other fittings of fuel oil systems and lubricating oil systems are to be of the fire resisting metals.

5. Tanks used for the storage of the fuel oil or lubricating oil and oil strainers are not to be installed above hot parts.

6. Fuel oil tanks which do not form part of the barge's structure are to be of steel and to be of rigid construction.

7. Provision is to be made to prevent overpressure in any part of the fuel oil system and lubricating oil system. Any relief valves are to be discharged to a safe position.

8. Coamings or other arrangements are to be provided at each oil tank, oil pump and oil strainer, and suitable means are to be provided for disposing of fuel oil drains.

9. The suction pipes from all tanks, except double bottom tanks, are to be provided with stop valves or cocks secured to the tank walls

10.Valves, cocks or other fittings fitted on tanks are to located in safe positions as to protect them from the external damage.

11.Main suction valves of all fuel oil tanks except for double bottom tanks are to be capable of be- ing closed from a remote position which will always be accessible. This requirement, however, may not be applied to tanks for which the Society specially approved considering the arrangement or the capacity of the tanks.

12.Fuel oil pipings are to be entirely separated from other pipings. Where, however, it is unavoidable to interconnect to any other pipings, effective means are to be provided to prevent the accidental contamination with other liquids while in operation.

13.Lubricating oil pipings are to be entirely separated from other pipings, unless specially approved by the Society.

14.As for the systems of fuel oil having a flash point below 60 ℃ are to comply with the require- ments in Pt 5, Ch 6, Sec 9 of the Rules.

406. Air pipes, overflow pipes and sounding devices 【See Guidance】

1. Air pipes, overflow pipes and sounding devices are to comply with the requirements in Pt 5, Ch 6, Sec 2 of the Rules for the Classification of Steel Ships except the following requirements for the in side diameter of the air and overflow pipes and for the arrangements of overflow pipes.

2. Air pipes fitted to tanks which do not form part of the barge's structure are to be in accordance with the discretion of the Society for the capacity and service conditions of the tanks.

3. Overflow pipes are to be provided to settling tank and service tank for fuel oil which can be pumped up, or to other tanks having any openings below the open end of air pipes.

4. The overflow pipes are to have sufficient area for pump capacity to prevent overflow from other opening of the tanks while liquid is filled.

5. For unmanned barges, if it is recognized that the safety of the barge is not impaired, the air pipes and sounding devices may be dispensed with for particular compartments except tanks, irrespective of the provision in 1.

Rules for the Classification of Steel Barges 2015 75

407. Bilge systems

1. An efficient bilge pumping system is to be provided in all barges capable of pumping from and draining each watertight compartment when the barge is on an even keel and either upright or list- ed 5 deg. If the Society is satisfied that the safety of the barge is not impaired, the bilge system may be dispensed with for particular compartment.

2. Where common bilge main connected with branch bilge suction from each compartment is pro- vided, at least two independent power bilge pumps are to be provided. Each pump is to be con-

nected to the bilge main, and is to be capable of

discharging the bilge effectively even where the

one pump gets out of order. These pumps may be substituted by bilge ejectors in combination with sea water pump.

3. The power bilge pumps prescribed in Par 2 are

to be in accordance with the discretion of the

Society. Area and length of the bilge suction pipes and the bilge main are to be such that the ca- pability of the bilge pumps is not impaired.

4. Where any source of power is not available on board, such means as manual bilge pumps are to be provided to drain each watertight compartment.

5. Where centrifugal pumps are employed in bilge drainage, they are to be of the self-priming or the equivalent type.

6. The manual pumps prescribed in Par 4 are to be located above the upper deck, or at the high convenient level which is easily accessible, and they are to be capable of operating effectively.

7. Special bilge systems are to be subjected to the approval of the Society.

8. Bilge suction pipes are to be entirely separated from pipes used for filling or emptying spaces car- rying water ballast or all.

9. Non-return valve or cock which does not permit the communication between bilge and ballast water tanks, fresh water tanks or fuel oil tanks is to be provided to bilge suction pipes connected to any pump having a seawater or fuel oil suction in order to prevent the possibility of water or fuel oil passing into the water-tight compartments from the sea, fuel oil tanks or water tanks or bilge pass- ing from one compartment to another through the bilge pipes.

10.Valves and cocks which are connected to bilge system are to be located at an easily accessible position.

11.Branch pipes of each bilge suction are to be led to mud boxes or rose boxes which are to be ar- ranged for easy cleaning without disconnecting any joint of the pipe.

12.For barges which are intended to carry oil having a flash point 60 ℃ or be1ow as cargo, bilge in a pump room and compartments which are adjoining to cargo oil tanks is not to be led to com-

partments which do not adjoin to the cargo tanks. Further, bilge pipes in a cargo oil pump room

and compartments which are adjoining to cargo oil tanks are to be entirely separated from the bilge pipes in other compartments not adjoin-ing to the cargo tanks.

13.For unmanned barges, in general, portable pumps or other suitable drainage means are to be provided.

408. Scuppers 【See Guidance】

1. Scuppers sufficient in number and size to provide effective drainage are to be provided in the free- board deck.

2. Scuppers draining weather decks and spaces within superstructures and deckhouses of which access openings are not provided with closing means complying with the requirements in Pt 5, Ch 6, Sec 3 of the Rules, are to be led overboard.

3. Scuppers from spaces below the freeboard deck or spaces within enclosed superstructures or en- closed deckhouses on the freeboard deck are to be led to the bilges. Alternatively, scuppers pro- vided with valves may be led overboard, where the Society is satisfied that the pipes are provided with adequate protection to prevent from flooding into the board.

4. Scuppers originating at any level and penetrating the shell plating either more than 450 mm below

76 Rules for the Classification of Steel Barges 2015

the freeboard an automatic

deck or less than 600 mm above the summer load waterline, are to be provided with non-return valve at the shell plating. This valve, unless required by Par 3, may be

omitted provided that the pipe thickness is in accordance with the Pt 5, Ch

the Rules for the Classification of Steel Ships.

6, Table 5.6.2. of

5. Scupper pipes passing through the shell plating below the freeboard deck are to be of steel or oth- er approved materials. Valves and shell fittings for scuppers passing through the shell plating below the freeboard deck are to be of steel, bronze or other approved ductile materials.