FIRE PROTECTION
PHILOSOPHY AND DESIGN GUIDEPROCEDURE NO.
PTD-DGS-133
REV
0
DATE
Nov. 11, PAGE OF 50
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Fire Hazardous Equipment – Equipment containing flammable materials. See Reference (4) API-2218
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Fire Hazard Envelope – “The three dimensional space into which fire hazardous (fire potential) equipment can release flammable or combustible fluids capable of burning long enough and with enough intensity to cause substantial property damage. This space extends 20 to 40 ft radially and 30 feet vertically from the fire hazardous equipment and from its drainage path.
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Fire Water Governing Case – The Fire Water Governing Case is the firewater requirement for the Fire Fighting Zone requiring the largest Fire Water capacity.
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Fire Water Pumps – The main firewater delivery pumps sized to deliver firewater at least the firewater governing rate and with sufficient pressure for effective fire fighting.
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Fire Water Ring Main – The main firewater header. A ring is used so that water can be delivered from more than one direction (in the event that one section of the header is isolated and out of service).
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Flammable Liquid – A liquid which produces flammable vapors and which has a flashpoint below F and a vapor pressure not exceeding 40
psia at 100 F.
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