On post-weld heat treatment of pressure vessels
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Apart from the different purposes of post-weld stress-relief heat treatment and post-weld dehydrogenation treatment for pressure vessels, are there any other differences between them? Can post-weld stress-relief heat treatment replace post-weld dehydrogenation treatment?
If post-weld stress-relief heat treatment is carried out immediately after welding, hydrogen removal heat treatment can be omitted
I get it a bit now! The temperature for hydrogen removal treatment, also known as post-heating treatment, is generally around 200 degrees, while the temperature for stress relief treatment after welding is usually around 620 degrees! ! Timely post-weld heat treatment can eliminate the need for hydrogen removal treatment, but the time must be kept within 1 hour! ! :) :) :)
The main purpose of post-weld stress-relief heat treatment is to eliminate welding residual stresses, with the temperature typically around 620 degrees! Timely post-weld heat treatment can eliminate the need for hydrogen removal treatment. Hydrogen removal treatment, also known as post-heat treatment for hydrogen removal, is a heat treatment process designed to release hydrogen and prevent crack formation; the temperature used in this process is generally around 200 degrees.