Valves with CS body and CRA (other than SS316) trim
Valves with CS body and CRA (other than SS316) trim
(OP)
I have observed our client has used valves with CS body and Duplex SS/SDSS/Alloy 825 trim. Generally manufacturers may recommend DSS/SDSS/ALloy 825 etc grades for valve trim incase they need more strength or torque however from corrosion stand point, can it be justifies using such valves?





RE: Valves with CS body and CRA (other than SS316) trim
in a corrosive service, generalised corrosion at a low rate maybe acceptable for pressure casing but valve internals usually need geometric dimension stability to ensure seal and correct functionning, thus a more noble material can be justified for some parts
RE: Valves with CS body and CRA (other than SS316) trim
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P.E. Metallurgy, Plymouth Tube
RE: Valves with CS body and CRA (other than SS316) trim
Valve trim material should be of concern as Corrosion is mainly due to the fluid/wetted parts.
PME
Hard Work with Smartness is the key to success
RE: Valves with CS body and CRA (other than SS316) trim
What are the conditions that the valve is subjected to?
Am I right saying, using carbon steel with 825 cladding?
Thanks,
Jeffrey