TÜYAK BİLDİRİLER KİTABI 2009 PROCEEDINGS BOOK 1.13. Supports Many contractors do not consider the right type of supports, numbers, and locations, and some time piping weight, or fittings will be supported on the pump flange, which can lead to piping movement, or breaking pump flange, supports, with considering seismic calculation in some countries of the world, need to look to it very carefully. 1.14. Going Though Walls Many contractors will put piping through walls, not considering required space as per NFPA, which lead to stress on piping, specially in case of earth quake. 1.15. Suction Strainer NFPA required only suction strainer for vertical turbine pumps, or inline fire pumps, many wrong use it for end suction, or split case, and even forget to make space for cleaning. 1.16.Exhaust Piping Length Over 4 meter length, you need to go back to engine manufacture to get the right exhaust pipe size, we see clients going 90 meters with small size, facing chance of back pressure on the engine power. 1.17. Wiring Many mistakes as follows:w Selecting wrong CB for power supply to electric fire pump. w Using fire controller as junction box to another pump, like jockey pump. w Using wrong cable gland size. w Connecting Fire pump transfer switch, to the building transfer switch. w Not securing the cables supplying power to fire pump room from fire hazard. w Not connecting the fire pump remote connections to building alarm panel. w Going to the controller from bottom, and going inside the panel from bottom to top, forcing many components under cable weight. w Using bigger cable to enter controller gland, and remove few wires to accommodate the smaller gland. 1.18.Common mistakes: w Tank overflow pipe inside the pump room, to pit, losing power at night, the submersible pump is not working, water level go higher till submersible pump starter, power back, short at submersible pump panel, room flood by water. w Short length fuel tank vent pipe, which lead to fuel gas inside the room. w Bad ventilation or no ventilation. w Discharge test head inside the pump room. w Using wrong size air vent valve. w Forget to install casing relief valve on electric fire pump, or radiator cool diesel engine fire pump. w Connecting many other pumps on the same fire pumps header. w Using wrong or smaller size batteries, especially at replacement of original batteries. w No emergency lighting inside the fire pump room. w Putting valve on the supply on the sensing line. w Using butterfly valve or suction reducing valve on distance less than 15 meter from pump flange. 6 TÜYAK 2009 w Using wrong fuel grade. w Forget to make sump inside the pump room for water leakage, or engine heat-exchanger outlet. w Returning the outlet of heat-exchanger to the tank, or suction line. w Return the relief valve outlet to the suction line, or to the flow meter discharge line. w Mixing between raised face flange, and flat face flange. w Using non-OS&Y gate valves. w Install sensing line check valve in wrong direction. w Not follow the NFPA example, and rules of setting the pressure switches of the controllers. 2. Conclusion Fire pump is very critical equipment, and life of many people depend on how you select, install, operate, and maint it, special consideration need to be taking during installation process, it is not normal pump, not like others, please look to NFPA code before starting the design of the installation work, check with manufacture representative, it is your rights to ask for his help as the pump performance depend on how you going to install it. Get the pump manufacture representative, engine manufacture representative, and controller representative to inspect the installation, attend the start-up. Ask now, clarify any misunderstanding, it is better to others question you after fire loss. 3. References 1. NFPA20 2. NFPA 70, section 695. Brief Curriculum Vitae Eng. Hatem Kheir – General Manager Kheir Group, Cairo - Egypt Graduate from Cairo University 1981 with graduation project of designing of low lift pump, then one year as professor assistance in Mansour University, the 2 years with Peerless agent in Egypt, then 5 years with Zahid Tractor, Saudi Arabia till he achieved the position of branch manager of Qasuim branch, then 3 years as Peerless Pump area manager in Egypt, and since 1992 as the agent for Peerless Pump in Egypt, starting Kheir group as 2 person company till achieved to be one of the top 3 in pump business companies in Egypt, with 53 persons, aiming on the best engineering support, and best after sales service. Member of the following Business Organizations: w American Chamber of commerce in Egypt. w Dutch business club in Egypt. w British Egyptian Business Association. w German Arab Chamber of Industry and Commerce. w Subscriber to many information sources, like Noonz.com, TAS, Encomiast, Fire contractors, Fire Engineering, Pump Analyst … etc. Member of the following Engineering Associations: w Society of Fire Protection Engineers – USA w Fire Protection Association – UK
w One of the founders, and board member of Egyptian Fire Protection Association. w Represent Egypt in Confederation of Fire Protection Association – International (28 fire protection Associations) w Member of Board of Directors for Confederation of Fire Protection Association – International, (The Only One From Africa&Middle East). w Full Member of NFPA 20 Technical Committee (The only International member). w Member of Ashrae Cairo Chapter BİLDİRİLER KİTABI TÜYAK PROCEEDINGS BOOK 2009 TÜYAK 2009 7
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