Does the fitting seat of 12cr1movg require heat treatment?
Thread Content
Does the fitting seat for 12cr1movg DN40 require heat treatment? What thickness requires heat treatment?
It is necessary; when this material is used in pressure pipes or vessels, heat treatment is required after welding at any thickness. GB150 has requirements.
What you’re asking is whether it’s necessary after welding; definitely, heat treatment is required after welding equipment or pipes
It is described in detail in GB150 and DL/T 819, the technical regulations for welding heat treatment in thermal power plants; you can take a look. By listening to others, one will never improve; only by seeing and thinking for oneself does something gain true value and meaning