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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[@jaredcarian6277]

Thank u very much..more of these please ut is very helpful for me as an ME

[@wawansharpone7341]

Excellent explanation and very usefull . Thanks a lot

[@AMJEngineering]

Thanks

[@zian.2493]

Very informative video👍

[@salehshati1902]

ty

[@turguthuseynov5230]

Maybe it is the best explanation, thank you!!! Really, but what about the sizing of pump, if that pump is serving FHC + SPRINKLERS AND + HYDRANT systems together ? Please, respond me

[@m.arahman4731]

Thanks

[@AMJEngineering]

welcome👍

[@Justlikethat2030]

Thank you so much for this video.what if there is a single main line having 52 Hydrant( class 1) for 6.5km long road tunnel( elevation from one portal to the other is 145m , uniform gradient). How will then we calculate

[@paulomorales6505]

Thanks a lot.Good explanation at all. What about the sizing of pump with sprinklers and stand pipe? Or we just need to sum sprinkler hydrauclic calculation + hydraulic calculation of stand pipe? Hoping you will notice me

[@AMJEngineering]

Yes you have to sum it.

[@ironmatic1]

No. Whichever is greater, which is usually standpipe demand.

[@bagusbudi3018]

Hi sir, thanks for the video. just a question in 05:19 where did the 0.00271 came from?

[@AMJEngineering]

refer to 3:47, it is friction loss in pipes

[@darrelluzon5283]

great video. But why does the diameter of the pipe changes from 6 inches to 6.065 inches?

[@AMJEngineering]

6 inches is the nominal diameter size. for friction loss calculations you have to consider internal diameter.

[@MuhammadJawad-mx3yh]

Such a wonderful explanation, much appreciated keep it up. if there is one riser serving 9 floors of building and each floor has 4 fire hose cabinets, then what would be the size of main riser a/c to NFPA?

[@ironmatic1]

according to your hydraulic calculations...

[@mohammedmalik9311]

Please how u convert static head from 20 meters to 29.4 PSI

[@AMJEngineering]

10m water height means 1 bar pressure. 1bar = 14.7 psi

[@demonic__afzuu7554]

Hi what does inside and outside hose meaning ??

[@bimafernand4860]

please tell how to get 0.00271 psi and 0.00075 psi ? thank you

[@djestengineer8342]

Please explain how to get 0.00271 psi & 0.00075 psi. Thank you

[@AMJEngineering]

refer to 3:47 friction loss formula

[@Mrhandyhitman]

The 1250 GPM is only for non sprinkled buildings just an fyi

[@ajaysherekar6539]

Very informative video but for begineers its too fast. Need to slow down to understand all aspects.

[@keiramcdonald8802]

Is this American or British?

[@karthikk3192]

Mostly America follows NFPA code and UK with BS EN 12845 code

[@AMJEngineering]

yes it is American

[@HoraceHingCheungPoon]

Any certificates?

[@rinsonjacob9408]

Sorry. I dont have basics. Thats why i dont understand anything. Any suggestion to read basics.

[@AMJEngineering]

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