×
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

Deluge system piping pitching ?

Deluge system piping pitching ?

Deluge system piping pitching ?

(OP)
Does piping for Deluge systems need to pitched ?
I have 5 deluge sytems protecting an glass wall atrium with open nozzles .  NFPA 13 call for all dry systems to be pitched , but I would be in the thought process to apply NFPA 15 Water spray fixed sytems(2007) 6.3.3.1 "all water spray systems pipe and fittings shall be installed so the system can be drained "

So any trapped piping would require a drain . Its not in an area where its supject to freezing either .

thanks in advance !



 

RE: Deluge system piping pitching ?

Main drain

Do not have the book, but it is not a dry system, so should not have to be pitchers,
Yes if trapped areas install drain if book requires it

Most of the piping should be open

RE: Deluge system piping pitching ?

It would be a good idea to get as much of the water out as possible to avoid corrosion.  

Even if the pipe is galvanised, I think it would be a good idea to get the water out.     

RE: Deluge system piping pitching ?

My Take.....

1. Will you ever trip the system and fill it with water?? Most likely not unless they(building owner) have provided drainage for the water, which most do not.
2. The pipe will have openings every 10-12'I assume since they will have open sprinklers and or nozzle's. So I would think any water that MAY be in the pipe will evaporate.
3. Any trapped pipe should have provisions to be drained via low point drains.

So to answer your question, NO and I think NFPA will agree.
 

****************************************
Fire Sprinklers Save Firefighters' Lives Too!


 

RE: Deluge system piping pitching ?

in NFPA 13 8.16 drains, deluge does not appear there with a requirement for pitch.

yes you still have to drain any sections of the pipe that may have trapped water.

RE: Deluge system piping pitching ?

I think the system will need to be filled with water so it can be pressure tested.  If that's the case, there should be a way of getting the water out after testing.  

 

RE: Deluge system piping pitching ?

Blue

Unless you plug every sprinkler head opening there is no way to pressure test it

Yes on initial install, but after that the piping is completely open, if we are talking about a true deluge system

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