Is heat treatment required for the splicing of manhole flanges?
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I would like to ask the experts: For manholes on non-standard equipment that comply with standard HG/T21599, is stress-relief heat treatment after welding required for the flange joints? ? ?
Stress-relief heat treatment must be carried out on the flange after welding in order to avoid deformation caused by welding stresses and prevent leakage at the flange.
Stress-relief heat treatment must be carried out on the flange after welding in order to avoid deformation caused by welding stresses and prevent leakage at the flange.
Come in and learn* a bit; where did you get the screenshot from, original poster?
Stress-relief heat treatment must be carried out for the butt weld of the flange
Bro, you’ve already sent it out yourself – it’s definitely needed. Even for the equipment flanges, heat treatment and non-destructive testing are required if they are to be joined together.