Stress relief treatment – Weld repair depth
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TSG R0004-2009 4.2.4 (4): For pressure vessels that require post-weld heat treatment, welding repairs should generally be carried out before heat treatment. If welding repairs are done after heat treatment, it is necessary to determine whether heat stress relief treatment is required based on the depth of the repair welds; is there a quantitative standard for determining the depth of repair welds in this context? Or where can I find evidence? Looking forward to expert advice~
This issue has been discussed within the forum, and the answer is that there’s no definite answer
This post was last edited by qinghuangzj on 2012-8-10 at 16:50. There was no way to do it two years ago, but now there is. Clause 7.4.4 of GB150.4-2011, “. . . If repair is carried out after heat treatment, and the depth of the repair is less than 1/3 of the steel thickness and not more than 13 mm, post-weld heat treatment is not required. . . . ” Also, don’t forget to check clause 7.4.3, which defines the situations in which reheat treatment is required regardless of the depth of repair.
What was said upstairs is very comprehensive; come in and learn a bit*
HG/T20584 also contains relevant provisions, providing more detailed explanations on the basis of the requirements specified in GB150:
Uh, a post from two years ago – and still engaging in such digging up of old grievances! :handshake
If an individual component is forgotten to be welded, it must be welded again (not on the existing weld). How should this be calculated? It probably can’t be considered as a repair task. So what’s the proper way to handle this? Please advise
It seems that Amendment 1 to the Fixed Capacity Specification has relevant provisions.
It can be handled in accordance with the requirements of 7.4.3 and 7.4.4 of GB150.4-2011, and paragraph 6 of 8.0.2 of HG20584-2011. :lol