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Stumbled on an old weld inspection report from 1978, the numbers floored me
I was digging through some files at the shop, trying to find a pressure vessel spec, and I found a copy of a 1978 inspection report from a refinery over in Gary. The acceptance criteria back then allowed for porosity we'd never pass today, and the reject rate was something like 15 percent on welds we'd consider routine. It made me realize how much the codes have tightened, especially around arc strikes and preheat. Anyone else ever come across old paperwork that changed how you look at current standards?
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richard_mason19d ago
Fifteen percent reject rate blows my mind. That means one out of every seven welds got cut out and redone, which is insane when you think about how much time and money that wasted. And the porosity they let slide back then? I have seen old radiographs from that era where you could drive a truck through the holes and they still stamped it good. Maybe it is just me but I feel like half of what we call a defect today would have been a normal Tuesday in 1978. It really makes you wonder how many of those old vessels are still out there running with welds that would get you fired now.
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