Re: thumb rules of general piping

From: <Geoff>
Date: Thu Sep 15 2005 - 19:44:00 EDT

Hi,
Hazen Williams with Equivalent charts is acknowledged as being far less accurate than Darcy and Colebrook White.

I suggest that you download Epanet (freeware) and learn to use that. You can select Hazen Williams or Darcy. It allows you to put in pump curves and model a system. The Likes of Haestads Watercad and Mikenet use the Epanet engine for their very expensive software. Only problem is that you dont get vendor support with Epanet. However there are Forums about the place that allow you to get help when necessary.

If you are unsure about the basics what the hell are you doing being responsible for the design for a fire system? Suppose the place burns down because you get it wrong. You go to jail! The charge culpuble homicide, depraved indifference or what ever the statutes have listed. In some third world countries they could shoot you. And frankly you would be deserving.

Arturo Murillo T Visa CLN <amurillo@t-visa.com.mx> wrote: Sudhish ,

1)

You should get, NFPA 14 , or NFPA 31 bulletin.

They have a specific Equivalent Pipe Length Chart , and they use Hazen Williams .

2)

Logic, common sense, etc. ..

Trust your self.

Arturo M.

• Original Message ----- From: "sudhishjoseph" <sudhishjoseph@yahoo.com> To: <PipingDesign@yahoogroups.com> Sent: Thursday, September 15, 2005 6:46 AM Subject: [PipingDesign] thumb rules of general piping

> Hello,
> I would like to know general rules used when designing piping for say
> fire fighting. That is general procedure like:
> 1) Which formula used for computing friction head(I used darcy
> equation--is it practical)
> 2) How do u find out if the calculated friction head is correct?
>
> Could anyone give a brief procedure, I understand it is very vast field
> but still ---
>
> Thanks,
> Sudhish
>
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[Non-text portions of this message have been removed] Received on Thu Sep 15 19:44:00 2005