SS piping with threaded broze valves
SS piping with threaded broze valves
(OP)
Hello everyone,
I'm doubtful on material compatibility for a piping project compliant to ASME B31.3. Threaded bronze valves are to be installed on stainless steel pipe A-312 carrying crude water. As for corrosion between materials, is there a justification per standard ASME or ASTM that allows or forbids such instalation?
Thanks
I'm doubtful on material compatibility for a piping project compliant to ASME B31.3. Threaded bronze valves are to be installed on stainless steel pipe A-312 carrying crude water. As for corrosion between materials, is there a justification per standard ASME or ASTM that allows or forbids such instalation?
Thanks





RE: SS piping with threaded broze valves
What is the conductivity of the water? Temp, pH, and TDS also.
If the water is corrosive then you will likely have galvanic issues, especially since the area of the weaker alloy is relatively small compared to the more noble.
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P.E. Metallurgy, Plymouth Tube
RE: SS piping with threaded broze valves
Thanks for your reply. Exact water conditions for this case are unknown, however it should not be a of great concern since it is obtained from a clean river at 20ºC.
My primary concern is the interaction between stainless steel and bronze.
RE: SS piping with threaded broze valves
If this was very clean water (pH=7.5, TDS<100ppm) then I wouldn't worry, but river water will have higher conductivity and it will serve to promote the galvanic corrosion.
Find better valves. Alloys such as Ni Bronze, Ni-Al Bronze, and a few others are robust enough that they would work without concern.
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P.E. Metallurgy, Plymouth Tube
RE: SS piping with threaded broze valves
RE: SS piping with threaded broze valves