×
INTELLIGENT WORK FORUMS
FOR ENGINEERING PROFESSIONALS

Log In

Come Join Us!

Are you an
Engineering professional?
Join Eng-Tips Forums!
  • Talk With Other Members
  • Be Notified Of Responses
    To Your Posts
  • Keyword Search
  • One-Click Access To Your
    Favorite Forums
  • Automated Signatures
    On Your Posts
  • Best Of All, It's Free!
  • Students Click Here

*Eng-Tips's functionality depends on members receiving e-mail. By joining you are opting in to receive e-mail.

Posting Guidelines

Promoting, selling, recruiting, coursework and thesis posting is forbidden.

Students Click Here

Jobs

Estimating system water volume

Estimating system water volume

Estimating system water volume

(OP)
Are there any rules of thumb that would allow a consulting engineer to estimate the water volume in a preaction sprinkler system before the actual system layout is designed by the sprinkler contractor. I need an estimate to define the HP of the air compressor for the system

Thanks

Chaz12

RE: Estimating system water volume

There isn't much to go on it all depends on the size of the system, the water supply and hazard which has all to do with size of pipe.

On a double interlocked system http://www.vikinggroupinc.com/databook/preaction/070789.pdf you are supposed to maintain 50 psi for water pressure to 175 psi.  

I looked at a system I did; .30/2000 with a water supply of 70, 50 and 1200 and came up with 719 gallons over40,000 sq. ft. for 0.018 gallons per sq. ft..

A 10,000 sq. ft. system would have around 180 gallons based on the last system I did.

For you, me not knowing particulars, this information is all but useless but maybe it will give some sort of an idea.

Sorry I couldn't be more specific.

RE: Estimating system water volume

(OP)
Thank you, sir. Your post was helpful. Our system is single interlock and I have read that 20 psi in the system is normal. Our hazard is O2 and our pressure may be a little better: 82 static, 68 residual, at 1150 gallons.

But the compressors I looked at on the Viking site show that any volume over 300 gallons gets into a horsepower larger than 1/2. So I am going to tell the electrical engineer to provide a voltage higher than 120.

Thanks again.

Chaz12

Red Flag This Post

Please let us know here why this post is inappropriate. Reasons such as off-topic, duplicates, flames, illegal, vulgar, or students posting their homework.

Red Flag Submitted

Thank you for helping keep Eng-Tips Forums free from inappropriate posts.
The Eng-Tips staff will check this out and take appropriate action.

Reply To This Thread

Posting in the Eng-Tips forums is a member-only feature.

Click Here to join Eng-Tips and talk with other members!


Resources