![]() ![]() ![]() Even for VSR, it is normally applied before machining so that it will not move during machining. The second thing you want to look at would be whether it would accomplish what you are looking for dimensionally. However, since it is not addressed, then VSR is not prohibited by the code either, but it can't take the place of TSR. As mentioned by Jon, it is not addressed by ASME, so it is not allowed to be substituted. It is also not a replacement for thermal stress relief (TSR) if it is specified by the code. If you need it to improve the performance of the manifold by reducing that hardness of the weld/HAZ, and prevent cracking during service, then VSR will not accomplish this. The first thing you want to consider before looking at VSR, is what is the purpose of your stress relief in the first place.
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