As per API 650 Para 188.8.131.52 requires - One spot radiograph shall be taken in the first 3 m (10 ft) of completed horizontal butt joint of the same type and thickness (based on the thickness of the thinner plate at the joint) without regard to the number of welders or welding operators. If the contractor start welding on Horizontal butt Joint simultaneously at four locations, in that case how to select spot radiograph in the first 3 m (10 ft) of completed horizontal butt joint? Is it required to select 4 spots or one spot? Your expert interpretation /suggestions are highly appreciated.
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