Fixed pressure water spraying systems for machinery spaces.
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(3) Except in open ships fire buckets provided in compliance with these regulations shall not be used for any purpose other than extinguishing fire.
38. (1) Every fixed pressure water spraying system fitted in compliance with these regulations shall be provided with a pump, piping system, control valves, and spraying nozzles.
(2) The spraying nozzles referred to in paragraph (1) shall be of such a type, sufficient in number and so arranged as to ensure distribution of water spray such as will effectively extinguish oil on fire in the spaces protected thereby,
(3) Such spraying nozzles shall be fitted above bilges, tank tops and other areas over which oil fuel is liable to spread and above other main fire hazards in the spaces to be protected.
(4) The water spraying system referred to in paragraph (1) may be divided into sections and shall be controlled from distribu- tion manifolds the valves of which shall be capable of being operated from easily accessible positions outside the spaces to be protected and which will not be readily cut off by an outbreak of fire.
(5) Such water spraying systems shall be kept charged at the necessary pressure and the pump supplying the water for the system shall be automatically put into action by a pressure drop in the system,
(6) The pump referred to in paragraph (1) shall be capable of supplying water at the necessary pressure simultaneously to all sections of the water spraying system in any one compartment to be protected.
(7) The pump and its controls shall be installed outside the space or spaces to be protected.
(8) The system shall be arranged so that it is not possible for a fire in the space or spaces protected by the water spraying system to put the system out of action.
(9) Means shall be provided which will prevent nozzles from becoming clogged by impurities in the water or corrosion of piping. nozzles, valves and pump.
(10) The water spraying system shall include mobile sprayers ready for immediate use in the firing area of the boiler or in the vicinity of the oil fuel unit.
(11) No part of the water spraying system shall be situated forward of the collision bulkhead in any passenger steamer.
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(12) Operating instructions in clear and permanent lettering shall be affixed to every water spraying system or in a position adjacent thereto.
39. (1) This regulation applies to every lixed fire smothering gas or steam installation fitted in compliance with these regulations other than an installation filled in a ship of Class VIII or of Class X of under 150 tons in compliance with paragraph (5) of rule 45 of the Rules.
(2) In every such installation provided for the injection of gas or steam into machinery or cargo spaces for fire extinguishing purposes, the pipes for conveying the gas or steam shall be pro- vided with control valves or cocks which shall be so placed that they will be easily accessible and not readily cut off from use by an outbreak of fire.
(3) Such control valves or cocks shall be permanently marked to indicate clearly the compartments to which the pipes are led.
(4) Suitable provision shall be made to prevent inadvertent admission of the gas or steam to any compartment.
(5) Where cargo spaces fitted with a gas or steam smothering system for fire protection are used as passenger spaces the smother- ing gas or steam pipe connexion shall be blanked during service as a passenger space.
(6) The piping referred to in paragraph (2) shall be so arranged as to provide effective distribution of fire smothering gas
or steam.
(7) Where steam is used in any hold exceeding 60 feet in length there shall be at least two pipes one of which shall be fitted in the forward part and one in the after part of the hold.
(8) Except in tankers and ships used for the conveyance of coal, pipes for conveying steam shall be fitted with outlets as low as practicable in the space which they serve and as nearly as possible to the centre line of the space.
(9) In tankers the piping shall be so arranged that the steam or fire smothering gas will be distributed over the surface of the cargo.
(10) When carbon dioxide is used as the extinguishing medium in cargo spaces, the quantity of gas available shall be sufficient to give a minimum volume of free gas equal to 30 per centum of the gross volume of the largest cargo compartment in the ship which is capable of being sealed.
Fixed Are smothering gas and steam installations.
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