sorry, I thought we were talking sensing lines....but all of the pilot lines I have ever seen run in cooling towers have also been galvanized. And if any of my fire pump sensing lines are not full of water, I'm in big trouble! ;-)
Garth ----- Original Message ----- From: "Ron Greenman" <[EMAIL PROTECTED]> To: <[email protected]> Sent: Saturday, July 14, 2007 8:21 PM Subject: Re: Why brass, copper or stainless steel, in Pressure Sensing Lines? > Garth, > > Hopefully the sensing lines on your fire pumps are full of water as do > those on any hydraulic pilot lines you install. And those on your > pnematic pilot lines have compressed air which having been heated > during compression per Boyle's Law will then cool and cause the water > vapor prevalent in all air will condense and precipitate as water > droplets. > > On 7/14/07, Garth W. Warren <[EMAIL PROTECTED]> wrote: > > Ron, > > fortunately there is never water running through our sensing lines so there > > is never a chance that such build-up could ever occur in sensing lines. > > > > Garth > > a fitter > > ----- Original Message ----- > > From: "Ron Greenman" <[EMAIL PROTECTED]> > > To: <[email protected]> > > Sent: Saturday, July 14, 2007 6:40 PM > > Subject: Re: Why brass, copper or stainless steel, in Pressure Sensing > > Lines? > > > > > > > Aydin, > > > > > > Sensing lines are always small diameter. Brass, copper & stainless > > > steel are not subject to corrosion beyond the thin protective layer of > > > oxidized material that is insignificant relative to the diameter of > > > the tubing. Galvanized steel, particularly when subject to a damp, > > > enclosed environment, exhibits all kinds of crazy organic and > > > inorganic reactions. Have you ever seen a piece of 1/2" water line so > > > full of scale that you'd be hard pressed to force a 12 gauge wire down > > > the little hole left in the center? Don't want sensing lines that look > > > like that. > > > > > > On 7/14/07, Aydın ÖZKAYA <[EMAIL PROTECTED]> wrote: > > > > Dear All, > > > > > > > > I wonder why, "brass, cooper or stainless steel" piping (but not > > galvanized > > > > steel for instance) is specified for pressure sensing line for Fire Pump > > > > Controls in NFPA 20 7-.5.2 & 9-5.2. > > > > > > > > What is the rationality behind the "brass, copper or stainless steel" > > > > limitation? > > > > > > > > Thanks in advance... > > > > > > > > Kind Rgds. > > > > > > > > Aydın ÖZKAYA > > > > KARİNA Design, Consultancy and Training Services Ltd.Co. > > > > www.karina.gen.tr > > > > > > > > _______________________________________________ > > > > Sprinklerforum mailing list > > > > [email protected] > > > > http://lists.firesprinkler.org/mailman/listinfo/sprinklerforum > > > > > > > > To Unsubscribe, send an email > > to:[EMAIL PROTECTED] > > > > (Put the word unsubscribe in the subject field) > > > > > > > > > > > > > -- > > > Ron Greenman > > > at home.... > > > > > > > > > -------------------------------------------------------------------------- -- > > ---- > > > > > > > _______________________________________________ > > > Sprinklerforum mailing list > > > [email protected] > > > http://lists.firesprinkler.org/mailman/listinfo/sprinklerforum > > > > > > To Unsubscribe, send an email to:[EMAIL PROTECTED] > > > (Put the word unsubscribe in the subject field) > > > > > > _______________________________________________ > > Sprinklerforum mailing list > > [email protected] > > http://lists.firesprinkler.org/mailman/listinfo/sprinklerforum > > > > To Unsubscribe, send an email to:[EMAIL PROTECTED] > > (Put the word unsubscribe in the subject field) > > > > > -- > Ron Greenman > at home.... > ---------------------------------------------------------------------------- ---- > _______________________________________________ > Sprinklerforum mailing list > [email protected] > http://lists.firesprinkler.org/mailman/listinfo/sprinklerforum > > To Unsubscribe, send an email to:[EMAIL PROTECTED] > (Put the word unsubscribe in the subject field) _______________________________________________ Sprinklerforum mailing list [email protected] http://lists.firesprinkler.org/mailman/listinfo/sprinklerforum To Unsubscribe, send an email to:[EMAIL PROTECTED] (Put the word unsubscribe in the subject field)
