According to API 510, post-weld heat treatment (PWHT) of a repair weld may be waived under certain conditions. Which factor most commonly allows this waiver?
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A
The weld is made during daytime hours only
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B
The base metal P-number, wall thickness, and preheat meet the exemption criteria in the construction code
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C
The vessel has been in service for more than 10 years
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D
The repair is made with a low-hydrogen electrode only