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Aboveground piping

Question asked by Moises Garcia on Aug 15, 2016
Latest reply on Aug 15, 2016 by nocivus

Good morning,

I have a questions about the black steel pipe for sprinklers, i´m using black steel pipe A795 sch 40 welded, my doubt, why the pipe sch 40 A795 is not UL/FM? and the sch 10 is UL/FM.

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