dry pipe galvanized vs steel pipe
dry pipe galvanized vs steel pipe
(OP)
any opinon if galvanized is any better than steel in a dryp pipe system???
http://ecscorrosion.com/galvanized-steel-piping/
http://ecscorrosion.com/wp-content/u...er-Systems....
http://ecscorrosion.com/galvanized-steel-piping/
http://ecscorrosion.com/wp-content/u...er-Systems....





RE: dry pipe galvanized vs steel pipe
I do not know if single issues are available.
DISCLAIMER: My relation with FPC is as a satisfied subscriber.
RE: dry pipe galvanized vs steel pipe
To me, it appeared a bit like a sales pitch for their services.
There was another study similar to the one in FPC that appeared in Sprinkler Age in Oct 2013 that seems to validate some of their opinions - although the use of nitrogen with galvanized pipe was the best.
The new UFC 3-600-01 Fire Protection Engineering for Facilities (Army Corp of Engineers) has prohibited galvanized piping on dry and preaction systems, where it was previously allowed.
My opinion, is a lot of the problems have to do with installation and testing problems (pipes not drainable, use of rolled groove fittings, not getting the system dry after testing, etc., but since the designer cannot always control those very well, there will continue to be problems.
I like the greater focus on using nitrogen as the atmosphere in the dry pipe. It is dry and does not promote corrosion so even if all the water is not evacuated, there is no oxygen for corrosion to occur.
RE: dry pipe galvanized vs steel pipe
RE: dry pipe galvanized vs steel pipe
There are millions of sq ft of galv pipe out there for dry systems. As others have noted, this has been problematic, so the new approach is black with a n2 fill.
RE: dry pipe galvanized vs steel pipe
As per NFPA-13 clause 8.4.7.2.1 - where steel pipe is used in pre-action and drypipe system, piping materials shall be limited to internally galvanized steel.
Furthermore, as per my opinion galvanized pipe can be a galvanized iron pipe or a galvanized steel pipe. what we can compare is that a black iron pipe vs. galvanized steel pipe.
hope it helps,
RE: dry pipe galvanized vs steel pipe
Chicopee: regarding the c factor, it is interesting to note that the C value of 120 for galvanized pipe has disappeared in the latest edition (NFPA 13-2013 Table 23.4.4.7.1). It is now 100, just like black steel.
RE: dry pipe galvanized vs steel pipe