2. Specification of protection devices 3. Manufacturer details and specifications (including identification numbers) for all equipment
EMERGENCY GENERATOR AND GENERATOR FUEL SYSTEMS General Guide for New Emergency Generator and Fuel System Installations It is the best advice of FM Global to locate emergency generators and fuel tanks outside of the building. However, if a generator or tank must be located in doors or on a roof top, FM Global offers the following recommendations.
Main Tank Rooms
1. Provide one of the following
a. A 3 hour fire rated concrete or a 3 hour rated fire resistive covering specifically designed for a hydrocarbon fire exposure on any exposed steel in the tank room/vault, pump room/vault, and generator room. b. A 3 hour fire rated enclosure for the tank room/vault, pump room/vault, and generator room. Use concrete or masonry walls for the enclosures. Note: Design the tank room or vault, regardless of location, to contain the entire content of the fuel tank(s) plus a minimum of a 2 in. freeboard through the use of curbs or dikes. Ensure floors are liquid tight. Ensure walls are liquid tight for the height of the curb or dike. 2. For the main tank room, the following items should be provided: a. Provide an emergency drainage system in the tank room or vault or provide a special protection system. b. Arrange fuel tanks to be filled via a hard piped system that terminates outside the building. c. Provide overflow protection for the tank via a high liquid level device. d. Ensure the breather vent is hard piped to a safe location outside the building. e. Provide a properly sized emergency relief vent hard piped to a safe location outside the building. f. Arrange the discharge line for the tank to exit the top of the tank. For tanks with bottom discharge lines, provide a fusible link operated safety-shut- off-valve (SSOV) at the tank outlet. g. Provide automatic sprinkler protection in the tank room/vault designed to provide a density of 0.25 gpm/ft 2 over the tank room/vault area. h. Arrange tank filling operations to be automatically shut down upon detection of any of the following: i. High liquid level in the tank ii. A liquid spill in the tank room/vault
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