This standard deals with the selection and installation of pumps that supply liquids for special fire protection. The scope of this document is fluid supplies; suction, discharge and auxiliary equipment; power supplies, including power supply arrangements; electric drive and control; diesel engine drive and control; steam turbine drive and control; and acceptance testing and operation. This standard does not cover system fluid supply capacity and pressure requirements, nor does it cover requirements for periodic inspection, testing and maintenance of fire pump systems.
Since occupational safety and protection of human health are essential in fire pump systems, the manufacture and combination of products is made in accordance with the standards set by the American Fire Protection Association. This standard is called NFPA 20 for fire pumps and is the most adopted fire extinguishing standard in the world. Automatic sprinklers, fire cabinets for the building, external hydrant systems are designed according to NFPA 20 Standards.
According to this standard;
If the flow at the pump operating point increases by 150%, the operating pressure should not exceed a minimum of 65%. The pump closed valve pressure should not exceed 140% of the working pressure. Pump body should be cast iron (GG25-GG40). Parts that come into contact with water must be made of water-resistant, non-oxidizing material. Soft packing should be used as a sealing element in pumps and should be arranged in at least 5 rows.
'Relief Valve' should be used in fire extinguishing pump systems to prevent high pressure from damaging system equipment. Fire pump extinguishing systems should be in the form of 1 main + 1 spare + Jockey pump. Where there is no generator, the backup pump must be diesel engine driven. Bearings should be selected according to 5000 hours life calculation.
In the facilities where there is enough powerful generator, the backup pump can be electric motor driven. Jockey pump operating pressure must be at least 0,7 bar above the fire pump pressure. NFPA 20 suitable jockey pump selection is 1% of the desired flow or 3-3.5 m3/h capacity per hour. It covers the types of fire pumps, horizontal split case pumps, end suction pumps, multistage pumps, inline pumps conforming to NFPA 20. should consist of the characteristics of the fire pump and pump systems.
NFPA 20 suitable jockey pump selection is 1% of the desired flow or 3-3.5 m3/h capacity per hour. Fire pumps conforming to NFPA 20, horizontal split case pumps, end-suction pumps,
It covers the types of multistage pumps, inline pumps. should consist of the characteristics of the fire pump and pump systems.
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