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R Stamping a non-U Stamped Pressure Vessel

M

MoTh97

Petroleum
Apr 8, 2025
1
Can a pressure vessel that is ASME Sec. VIII constructed, but not U stamped, be R stamped after any repair or alteration?
 
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Maybe. See NBIC, Part 3, 1.2(b).
 
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I am guessing without reading NBIC: "No", not an U stamped vessel by AI, why AI shall approve a "R" stamp. Just repair at your own risk.
 
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