Steve, Just guessing, maybe with a jerry rigged stethoscope your ears can hear the difference between clean pipe, ice layer built up pipe and solid ice plugged pipe when you rap the pipe while listening to the pipe with a stethoscope rigged up in some way to directly couple the stethoscope to the pipe. Perhaps with some experimentation you can find a way to do this if it is possible. Of course you’ll need to know ahead of time where you are working with the real thing to figure this out. Don’t freeze your ears to the pipe.
Allan Seidel St. Louis, MO On Dec 2, 2013, at 6:19 PM, Steve Leyton <[email protected]> wrote: > Chris: > > We know exactly where the principal plugs are and why. I am programming a > remediation and upgrade to address the cause, which is flawed air supply > design and installation. The client raised the issue today of assessing the > entire installation and assuring it's free of all plugs that may have formed > downstream of where the recurring problem is located. Work area is very > cold, frozen food storage, can't introduce stuff that will dirty the air, > booger up the environment, etc. > > Anyone know for sure if ultrasound equipment will work in -20°F? > > Steve > > > > > -----Original Message----- > From: [email protected] > [mailto:[email protected]] On Behalf Of Cahill, > Christopher > Sent: Monday, December 02, 2013 3:20 PM > To: [email protected] > Subject: RE: Ice plug detection > > Why do you think you have plugs? Attic system or freezer? > > They usually form at the transition from warm to cold. Should be within a > few feet of that on the cold side. And I'm sure per NFPA 13, pick your > edition, been there a very long time. > 7.9.2* Spaces Maintained at Temperatures Below 32°F (0°C). > 7.9.2.1 General. > 7.9.2.1.1 Where sprinkler pipe passes through a wall or floor into the > refrigerated space, a section of pipe arranged for removal shall be provided > immediately inside the space. > 7.9.2.1.2 The removable length of pipe required in 7.9.2.1.1shall be a > minimum of 30 in. (762 mm). > > Chris Cahill, PE* > Senior Fire Protection Engineer > Burns & McDonnell > 8201 Norman Center Drive > Bloomington, MN 55437 > Phone: 952.656.3652 > Fax: 952.229.2923 > [email protected] > www.burnsmcd.com > > Proud to be one of FORTUNE's 100 Best Companies to Work For *Registered in: MN > > > > > > -----Original Message----- > From: [email protected] > [mailto:[email protected]] On Behalf Of Steve > Leyton > Sent: Monday, December 02, 2013 5:13 PM > To: [email protected] > Subject: Ice plug detection > > Okay, slow day, I'll go first. So ... who's got suggestions about how > to find ice plugs in existing systems without pulling everything apart or > running a borescope down the piping? > > > > Steve Leyton > > PROTECTION DESIGN & CONSULTING > > 2851 Camino del Rio South, Suite 400 > > San Diego, CA 92108 > > ------------------------------------------------------------- > > Ph: 858.751.2930 - ext. 102 > > Fax: 858.751.2933 > > Cell: 619.972.5696 > > > > > > > > > > _______________________________________________ > Sprinklerforum mailing list > [email protected] > http://lists.firesprinkler.org/listinfo.cgi/sprinklerforum-firesprinkler.org > _______________________________________________ > Sprinklerforum mailing list > [email protected] > http://lists.firesprinkler.org/listinfo.cgi/sprinklerforum-firesprinkler.org > _______________________________________________ > Sprinklerforum mailing list > [email protected] > http://lists.firesprinkler.org/listinfo.cgi/sprinklerforum-firesprinkler.org _______________________________________________ Sprinklerforum mailing list [email protected] http://lists.firesprinkler.org/listinfo.cgi/sprinklerforum-firesprinkler.org
