Firefighting Lesson 1 | Sizing the pump for standpipe and fire hose system

You don't have good experience in fire fighting design! don't worry, in this lesson we will go step by step showing how to size a fire pump for the stand pipe and fire hose systems.

NFPA 14 is the required code to use in this lesson.

Note: I assumed only one riser is existing (F) when I performed the friction loss calculations for the 60 m portion of pipe. However, in case we have more than one riser like the schematic in the video which has six risers, A, B, C, D, E, and F, then the friction losses should be calculated based on the Hazen Williams formula as follows:

1. Flow in Riser F = 500 gpm (length to be considered: from bottom of riser E to 2nd remote unit on riser F because the most remote one is calculated in the 4 m portion)
2. Flow in pipe connecting E, F = 250 + 500 = 750 gpm (Length from bottom of D to bottom of E)
3. Flow in pipe connecting D, E, F = 250 + 250 + 500 = 1000 gpm (Length from bottom of C to bottom of D)
4. Flow in pipe connecting C, D, E, F = 250 + 250 +250 + 500 = 1250 gpm (Length from bottom of B to bottom of C)
5. flow from pump to bottom of riser C = 1250 gpm, because total not to exceed 1250 gpm.

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Видео Firefighting Lesson 1 | Sizing the pump for standpipe and fire hose system канала AMJ Engineering