IS we alow welding if we found leak on shell or at jacket , without releaseing presure ( pnumatic testing )

<Are you intending to weld on a vessel that is under pneumatic test pressure?
Please post here when and where you are welding, and I will be far far away.

I do not want to be offensive, but this idea sounds too stupid for a pressure vessel manufacturer.
On youtube there a some impressive videos of vessel explosions. Or you just take a rubber balloon, blow it up with a needle and compare the baloon's volume, it's overpressure of maybe 0,03 bar and the bang to your vessel size, the air pressure. Just try to imagine the bang.

DK

thanks

actually sir i dont have idea about such bad practicess but in last week i went at one small sjop n they doing welding on pressurised part to fill up leak

and in one interview one interviewer was asked me same que .