High Temperature material

[Manichum]

Hi

My client is needing a check valve which can handle 540 degrees Celsius.He has requested for 10 chrome and Moly 910.

My supplier has offered F22.

Would this be okay.

PLease help.

 

[davefitz]

F22 properties at 540C are OK, and for many years ( prior to 1990) that was the material of choice. However, if the component is a large size ( greater than 8" NPS) and the piping is P91 , there would be a large variation in wall thickness between the pipe and the valve's weld end- this can lead to thermal stresses at the butt weld during process startup and shutdown.

"Nobody expects the Spanish Inquisition! "

 

[metengr]

Make sure that the F22 valve material is purchased under ASME B16.34 or an equivalent. You can find temperature-pressure ratings for F22 material.