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....
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