Rules for the Classification of Floating Docks - Boat Design Net

Chapter 6only, may reach every part of the dock that is normallyaccessible in every operative condition.In machinery spaces with an aggregate total power outputof not less than 750 kW, two hydrants are to be provided,whilst one hydrant only may be accepted formachinery rooms with smaller power output.4.1.3 Characteristics of pumps, piping, hydrants,and hosesa) Docks with capacity equal to 2000 t or above: the diameterof fire mains, the pressure at hydrants and thecapacity of fire pumps are to be in compliance, respectively,with items [1.4.1] c), [1.4.1] f) and [1.4.2] d) ofSection 3 of RINA Rules for fire protection, detectionand extinction for the issue of statutory certificates otherthan SOLAS certificates.b) Docks with capacity equal to 1000 t or more but lessthan 2000 t: the requirements of a) above generallyapply except that, with two pumps simultaneouslydelivering the required quantity of water through thenozzles, the minimum pressure to be maintained at allhydrants is to be such as to ensure that the above nozzlescan project the required jets of water to a distanceof 12 m.c) Docks with capacity less than 1000 t: where only onefire pump is provided, the minimum pressure specifiedin item b) above is to be maintained with such pumpdelivering the maximum required quantity of water. Fordocks having a capacity less than 200 t, the minimumdistance for the water jet may be 8 m.d) The fire main is to be located outside machinery spacesand is to be constructed with fire- and heat-resistantmaterials.Hydrants are to be located in easily accessible positionsand piping is to be laid in such a way as to prevent itfrom being damaged.Unless a hose and a nozzle are provided for eachhydrant, connections of hoses and nozzles are to becompletely interchangeable.e) The washing line of the deck may be used as the firemain if it complies with the requirements of these Rules.f) Fire hoses are to be of non-perishable material approvedby RINA and are to be sufficient in length to project a jetof water to any of the spaces in which they may berequired to be used. Each hose is to be provided with anozzle and the necessary couplings.Fire hoses are, together with any necessary fittings andtools, to be kept ready for use in conspicuous positionsnear the water service hydrants or connections. Firehoses are to have a length of at least 10 m, but not morethan:1) 15 m in machinery spaces;2) 20 m in other spaces and open decks; and3) 25 m for open decks on docks with a maximumbreadth in excess of 30 m.g) Standard nozzle sizes are to be 12 mm, 16 mm and 19mm or as near thereto as possible. Larger diameter nozzlesmay be permitted at the discretion of RINA. Foraccommodation and service spaces, a nozzle sizegreater than 12 mm need not be used.For machinery spaces and exterior locations, the nozzlesize is to be such as to obtain the maximum dischargepossible from two jets at the pressure mentioned in a)from the smallest pump, provided that a nozzle sizegreater than 19 mm need not be used.Nozzles are to be of an approved dual-purpose type (i.e.spray/jet type) incorporating a shut-off.4.2 Fire-fighting arrangements in spacescontaining auxiliary boilers or otherinstallations for liquid fuel4.2.1 For docks of lifting capacity equal to 1000 t orabove, in spaces where oil fired auxiliary boilers areinstalled, having working pressure over 0,18 N/mm 2 , or inspaces containing fuel oil units, one of the following fixedfire-extinguishing systems is to be provided:a) pressure water-spraying system;b) gas system or equivalent;c) high expansion foam system.Fire-fighting arrangements for docks with lifting capacityless than 1000 t will be specially considered.4.2.2 There are to be at least two portable foam fire extinguishersor equivalent in each firing space in each boilerroom and each space in which a part of the fuel oil installationis situated. In addition, there is to be at least one fireextinguisher for each burner; the total capacity of the additionalextinguishers need not exceed 45 l for any one boilerroom. In the case of domestic boilers of less than 175 kW,RINA may consider relaxation of the requirements of thisitem.In each firing space there is to be a receptacle containingsand, sawdust impregnated with soda, or other approveddry material, in such quantity as may be required by RINA.Alternatively, an approved portable extinguisher may beprovided.4.3 Fire-fighting arrangements in spacescontaining internal combustion enginesor gas turbines4.3.1 In spaces where internal combustion engines or gasturbines with total power output of not less than 750 kWare installed, if the dock lifting capacity is equal to 1000 t orabove, the following equipment is to be provided:a) one of the systems indicated in [4.2.1];b) one foam extinguisher with a capacity of not less than45 litres in each engine room and, in addition, one portablefoam fire extinguisher for each 750 kW or fractionthereof; the total number of said portable extinguishersis not to be less than 2 and need not exceed 6.The arrangements foreseen in b) are sufficient for dockswith lifting capacity less than 1000 t.For docks with lifting capacity less than 200 t, the 45-litreextinguisher is not required.24 Rules for floating docks 2010