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sprinkler system calculations

sprinkler system calculations

sprinkler system calculations

(OP)
Hi, looking for info. on fire sprinkler calculations.

RE: sprinkler system calculations

That is a very broad question.  What specifically are you looking for?  NFPA 13, Chapter 8 outlines procedures for sprinkler calculations as far as what is required on working drawings.  Other books are available by Gagnon, Bryan, and Broman that go into greater detail.

-- Trashcan Man

RE: sprinkler system calculations

Firsly,  you need to know how to use the K value.  It is the same as mechanical engineers use as Cv of valves.

Cv=gpm/√psi        K=gpm/√psi

gpm=Cv*√psi        gpm=Cv*√psi

psi=(gpm/Cv)       psi=(gpm/Cv)

Second, You have to use the Hanzen-Willians pipe friction losses.

     4.52 * Q1.85
   p=________________
     C1.85  * d1.87
 
where: P= Loss in psi per ft.
       Q=gpm
       C=Friction loss coefficient (c=120)
       d=Inside diameter.

Now,  you can look at pages from 13-247 to 249 of NFPA 13.

Rdgs,

rewatson

RE: sprinkler system calculations

NFPA has a handbook titled "Automatic Sprinkler Systems" 1996/seventh edition.

It is an EXCELLENT reference.  Not only does it have code text, but also explanatory notes and examples.  

Chapter 6 deals with Plans and Calculations (Pipe Schedule and Hydraulic Calcualtions Methodes).

I greatly suggest you get yourself a copy.  It will pay for itself in not time.

Regards

RE: sprinkler system calculations

"not" = no

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