We are fabricating two vessels in SS316L (thickness 12mm) diameter
794mm each to be used as fuel gas separators. We have tried to
convince our client that we don't need any PWHT for the shell, since
the strain doesn't exceed 5% and that NACE MR0175 doesn' oblige that.
We decided to make the PWHT only for the dish ends.
But our client insisted to do it anyway for the whole vessels.
I need your input urgently
Best Regards,
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