Mike Lamb 65 Posted January 23 Report Share Posted January 23 The main runs of this boiler piping is silver. What material is this??? Quote Link to post Share on other sites
Bill Kibbel 82 Posted January 24 Report Share Posted January 24 Occasionally, I'll see stainless steel piping. 1 Quote Link to post Share on other sites
Rob Amaral 7 Posted January 27 Report Share Posted January 27 Another reason to bring magnet.. Quote Link to post Share on other sites
Mike Lamb 65 Posted January 27 Author Report Share Posted January 27 I thought of grabbing my magnet but my tool box was at the other end of the crawlspace, and I was too lazy to go get it. Quote Link to post Share on other sites
CNewhouse 1 Posted January 27 Report Share Posted January 27 Can stainless steel piping be sweated to copper fittings without galvanic corrosion? Quote Link to post Share on other sites
Marc 90 Posted January 28 Report Share Posted January 28 The potentials between copper and stainless is about half that between copper and iron. Still, what I've seen on the net discourages such direct connections. What interesting is that the copper erodes when joined to stainless. When joined to iron, the iron is the one that erodes. Quote Link to post Share on other sites
Chad Fabry 55 Posted January 28 Report Share Posted January 28 Stainless and copper can be sweat connected. I've seen it done with boiler systems- usually the boiler systems of engineers who worked at Kodak when Kodak was famous for being the stainless hardware supplier to felonious employees. I've never seen any sign of galvanic corrosion though- the 98:2 tin/copper solder likely isolates the dissimilar metals with an atoms-thick loving layer of protection. Quote Link to post Share on other sites
Mike Lamb 65 Posted January 29 Author Report Share Posted January 29 This boiler piping is about 20 yrs old. Never seen it before. Quote Link to post Share on other sites
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