My experience was on hydrogen and sour service only.
For a carbon steel vessel on lethal service have firstly a look a the code, and then check the client specifications.
If no restriction are present go further with the weld you desire.
As I remember ASME doesn't have rules for welds on...
I'm new in this forum so first of all, hello to everybody [peace]
With lethal service all welds that connect internal plates to the clad/w.o. shall be full penetration. This is mandatory.
Personally, I would suggest to perform always full penetration welds on all attachments (internal or...
