NFPA 13 Minimum pipe size for pilot line detectors?
NFPA 13 Minimum pipe size for pilot line detectors?
(OP)
Dear Forum,
I have previously used 1" pipe as pipe size for pilot line detector lines for deluge systems. However in figures for deluge systems of cooling towers in the Annex (A.22.21.2.1 thru 22.21.2.3), it indicates 1/2" pilot line.
Has anyone seen anything that would specify NFPA 13 minimum pipe size for pilot line detectors?
I have previously used 1" pipe as pipe size for pilot line detector lines for deluge systems. However in figures for deluge systems of cooling towers in the Annex (A.22.21.2.1 thru 22.21.2.3), it indicates 1/2" pilot line.
Has anyone seen anything that would specify NFPA 13 minimum pipe size for pilot line detectors?





RE: NFPA 13 Minimum pipe size for pilot line detectors?
RE: NFPA 13 Minimum pipe size for pilot line detectors?
A bit strange that it isn't specified anywhere no?
RE: NFPA 13 Minimum pipe size for pilot line detectors?
Travis Mack
MFP Design, LLC
www.mfpdesign.com
"Follow" us at https://www.facebook.com/pages/MFP-Design-LLC/9221...
RE: NFPA 13 Minimum pipe size for pilot line detectors?
RE: NFPA 13 Minimum pipe size for pilot line detectors?
Concensus certainly seems to 1/2" is the norm which matches the diagrams in NFPA so it's 1/2" from here on ;)
Makes sense enough LCREP that it is just holding air, etc. but similarly to Travis I was taught one way many moons ago and just figured that it was subject to the minimum of 1" minimum for steel pipe as required for sprinkler system pipe. I am wiser now.
Thank you both very much for your insight.
RE: NFPA 13 Minimum pipe size for pilot line detectors?
RE: NFPA 13 Minimum pipe size for pilot line detectors?
RE: NFPA 13 Minimum pipe size for pilot line detectors?
RE: NFPA 13 Minimum pipe size for pilot line detectors?