Great comments. Great information.
1" pipe with cast iron fittings filled with water explodes the side out of the
cast iron ell in 52 minutes at 17⁰F and that piece flies 65 feet when not
confined. I’ve done these experiments outside in winter.
Scott
Office: (763) 425-1001 x 2
Cell:
It is and has been surprising to me when fire protection contractors ask the
pipe freezing question or when they ask piping support questions in context
with approval by local AHJ of any kind. The reason for the surprise is because
contractors have ready access to materials, labor and space to
Hopefully, your sprinklers are not already installed.
Ryan L. Hinson, PE*, SET** \ Burns & McDonnell
Senior Fire Protection Engineer
O 612-900-3755 NEW \ M 763-688-4045 \ F 952-229-2923
rhin...@burnsmcd.com \ burnsmcd.com
8201 Norman Center Drive, Suite 500 \ Minneapolis-St. Paul, MN
Currently - NFPA 13-2019 allows pulling plugs and installing sprinklers
without another hydrostatic test.
28.2.1.8* When systems are being hydrostatically tested, tests shall be
permitted to be conducted with pendent or horizontal sidewall sprinklers or
plugs installed in fittings. Any plugs
Matt,
I think I agree with all of Bob's points. Likelihood of freeze damage in a
drained system should be lower, but in the event of damage the manufacturer
would probably use that as an excuse to not be held liable. So there is some
probably some risk there.
What are they hoping to
Just wondering, what would be the point of doing a hydrostatic test and then
replacing all the sprinklers. In a 40,000 sq. ft. system at 100 sq. ft. per,
that a potential for 400 new leaks.
-Original Message-
From: John Denhardt via Sprinklerforum
To:
Again personally, I would never knowingly put water in a wet piping system
unless the "client" can ensure or take responsibility" for any damage due
to freezing. Pulling the pendent sprinklers is not a viable option.
As a contractor, in almost all cases, our client backed down. In the case
when
Matt,
Not sure many people are lurking around the forum this week, so I’ll offer my 2
cents worth…. 1st and foremost, I would get the GC to sign off on a letter
stating that you are not responsible for any freeze damage resulting from their
request to perform the hydro prior to having heat in
we have a GC who wants to hydro test a pendant ESFR system before they have
heat in the building. They want to fill and test during the day while
temperatures are over 40F, and then drain the system before it gets cold again.
I thought it did not sound like a great idea, but I can't
