Brass/Bronze valves on SS316L pipes on seashore
Brass/Bronze valves on SS316L pipes on seashore
(OP)
I have used brass/bronze valves on 316L piping before, and the results have generally been good.
However, this time I'll be using it onshore, next to the sea. Anybody have experience with galvanic corrosion in this case? I'll be piping nitrogen. I'm worried about the atmospheric condition. Is isolating the connection necessary in this case? The connection is NPT thread.
However, this time I'll be using it onshore, next to the sea. Anybody have experience with galvanic corrosion in this case? I'll be piping nitrogen. I'm worried about the atmospheric condition. Is isolating the connection necessary in this case? The connection is NPT thread.





RE: Brass/Bronze valves on SS316L pipes on seashore
External sealant to prevent moisture from entering the threaded joint should be all that you need.
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P.E. Metallurgy, Plymouth Tube
RE: Brass/Bronze valves on SS316L pipes on seashore
Thanks for your input.
As for the 316 corrosion, we don't have much choice in materials as this section will be cryogenic. We are looking into other alternatives, but currently we are exploring the use of an aluminium based coating to protect the surface. Have you had similar experience before?
RE: Brass/Bronze valves on SS316L pipes on seashore
But if there are places where the rain wont wash it off and it ever gets real hot you could be in serious trouble.
Will the lines be insulated? That has pros and cons also.
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P.E. Metallurgy, Plymouth Tube
RE: Brass/Bronze valves on SS316L pipes on seashore
Lines won't be insulated. Since it's a part of a vapourising system, introducing as much heat as possible is desirable.
RE: Brass/Bronze valves on SS316L pipes on seashore
Not only will it be rained on, but when you are running there will be condensation, which should help.
I am concerned about thermal expansion, but that is another issue.
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P.E. Metallurgy, Plymouth Tube