Skipdeiter
Mechanical
I have a vessel 2.5" thick, P1 Gr. 2, and I want to weld the manway, also P1 Gr. 2, in with a partial penetration joint, either details (i), (j), (k).
Concerns exist (not mine) that the void in this nozzle has pressure during the stress relief cycle. Applying the gas law, with a fixed volume:
P1 / T1 = P2 / T2
100,000 Pa / 293 K * 894 K = 305 000 Pa.
There is no way this pressure is detrimental to any of these welds.
Is there any experience out there pertaining to stress relieving partial penetration Cat. D welds?
No NDE is proposed, but MPI / LPI is probably a smart idea for quality assurance.
Thanks,
Concerns exist (not mine) that the void in this nozzle has pressure during the stress relief cycle. Applying the gas law, with a fixed volume:
P1 / T1 = P2 / T2
100,000 Pa / 293 K * 894 K = 305 000 Pa.
There is no way this pressure is detrimental to any of these welds.
Is there any experience out there pertaining to stress relieving partial penetration Cat. D welds?
No NDE is proposed, but MPI / LPI is probably a smart idea for quality assurance.
Thanks,
