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UL/FM Fire Pump Systems Lunch & Learn 04/18/05

UL/FM Fire Pump Systems Lunch & Learn 04/18/05. Rules & Regulations. NFPA. CEA. National Fire Protection Association ( North America). Comité Européen Des Assurances (European). Fire Protection Pumps. End Suction Pumps Vertical In-line Horizontal Split Case

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UL/FM Fire Pump Systems Lunch & Learn 04/18/05

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  1. UL/FM Fire Pump Systems Lunch & Learn04/18/05

  2. Rules & Regulations NFPA CEA National Fire Protection Association (North America) Comité Européen Des Assurances (European)

  3. Fire Protection Pumps • End Suction Pumps • Vertical In-line • Horizontal Split Case • Vertical Mounted Split Case • Vertical Turbine

  4. Compliance to NFPA 20 • 100% Flow at 100% Head • Maximum of 140% of Head at Shutoff • Minimum of 65% of Head at 150% of Flow

  5. Maximum Allowed Pressure • The pump shutoff pressure plus the maximum static suction pressure shall not exceed the pressure for which the system components are rated for. • Pressure relief valves shall not be used as a means to meet this requirement. • Variable speed pressure limiting control drivers are acceptable in meeting this requirement (new in NFPA 2003).

  6. Fire Pump Drivers • Electric Motors • Diesel Engines • Steam Turbines • Combination of the above

  7. Fire Pump Accessories • Suction pressure/vacuum gauge. • Discharge pressure gauge. • Automatic air release valve • Casing relief valve (electric driven) • Main pressure relief valve (diesel driven and VFD applications)

  8. Suction Pipe & Fittings • Suction can be either from a city water supply or a fire water storage tank. • Suction shall be sized so that at 150% of rated capacity the velocity in the suction pipe located 10 pipe diameters upstream of the pump suction flange shall not exceed 15 ft/sec. • Concentric reducers are not allowed in the suction piping. • UL/FM OS&Y gate valve only.

  9. Discharge Pipe & Fittings

  10. Relief Valves • Used on Diesel Engines • Used with Variable speed pressure limiting control devices • Spring direct acting or pilot operated. • Relief discharges to an open or closed waste cone. • Discharges to suction source or splash block

  11. Test Meters • Where water usage or discharge is not permitted for the duration of the test. • Installed with upstream and downstream pipe runs per meter manufacturer. • Where meter downstream run goes back to suction side of pump proper pipe runs must be followed per NFPA-20. • A throttling valve shall be installed downstream of the flow meter.

  12. Hose Valve Test Header • Hose test valves are rated for 250 GPM. • Hose valves shall be mounted on a test head. • A UL/FM isolation valve shall be installed upstream of the test head. • A Ball drip valve shall be installed if the test head is mounted outside the building to prevent freezing.

  13. Specialty Valves & Accessories • Backflow Preventers • Suction Control Valves • Pressure Regulating Valves • Alarm Check Valves • Siemese Valves • Tamper Switches • Flow Switches

  14. Pressure Sensing Lines

  15. Electric Drive Pumps • Power derived by a reliable power source or two or more approved independent sources. • Second power source shall be from a second utility or on-site power generation • Automatic Transfer switch to be used if two or more power sources are used.

  16. Electric Drive Starting Methods • Across The Line • Part Winding • Wye Delta (open) • Wye Delta (closed) • Primary Resistance • Auto Transformer • Solid State

  17. Electric Driven Power Supply Arrangement

  18. Diesel Engine Driven Accessories • Cooling System • Fuel system • Raw Water outlet Drain • Battery Racks • Exhaust System • Air Intake Louver for Engine Air Intake (used with buildings)

  19. Fuel System design

  20. Pressure Maintenance Pumps • Rated for not less than normal leak load. (normally 1% of rated fire flow and 10 psig above rated boost pressure. • Discharge pressure shall be sufficient to maintain desired system pressure. • Where the shutoff pressure is greater than the pressure ratings of the system components a relief valve shall be installed on the pump discharge.

  21. House Utilities (per NFPA-20) • Approved or listed source of heat • Artificial Lighting • Emergency lighting (including fixed and portable). • Ventilation • Drainage • Convenience outlet

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