Coil butt weld
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Which standard should be followed for the non-destructive testing of the butt welds of the coils inside the container? Thank you! Should ray or surface probe be used?
I generally choose to conduct 100% radiographic testing on the coil butt joints in accordance with NB/T47013.2, requiring a grade II pass
What is the standard based on? The coil size is too small, making it difficult to operate!
There is no basis for this; it’s just a personal design habit. The circumferential weld joint of small-diameter tubes can be inspected using the double-wall double-shadow method.
We all use 10% rt
It depends on your user design requirements – whether RT or a probe is needed. If there are no special circumstances, a surface probe will suffice.
This is generally the requirement, to prevent leakage from causing issues.
According to the standards, 100% radiographic inspection should be carried out, with the acceptance level being no lower than Grade III and the inspection technology level being no lower than Grade AB.