UL FM Fire Pump Systems Lunch Learn 04 18 05

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

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

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

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

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).

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

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)

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.

Discharge Pipe & Fittings

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

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.

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.

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

Pressure Sensing Lines

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.

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

Electric Driven Power Supply Arrangement

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)

Fuel System design

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.

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