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Welding Carbon steel pipe shoes to stainless steel pipe

Welding Carbon steel pipe shoes to stainless steel pipe

Welding Carbon steel pipe shoes to stainless steel pipe

(OP)
We are looking at welding carbon steel pipe shoes to hot insulated 316SS pipe. Are we going to have problems with corrosion because of the dissimilar metals?

thanks

RE: Welding Carbon steel pipe shoes to stainless steel pipe

Why weld? Did you think about "clamp on shoes"?

RE: Welding Carbon steel pipe shoes to stainless steel pipe

You may have a problem depending on operating conditions; e.g., thermal cycling with large temperature delta, corrosion under insulation due to moisture ingress through leak paths in insulation cladding.

RE: Welding Carbon steel pipe shoes to stainless steel pipe

This kind of pipe support failure has occured on a project I worked on some years ago - 22Cr duplex SS pipes on CS pipe supports - apparently the fabricator had missed out inserting teflon insulating material between the pipe shoe and the pipe.

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