May I ask which standard should be referred to for determining the acceptance level of non-destructive testing on welded joints?
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The inspection levels in 8.1.1 of 50184 should correspond to the testing ratios in 8.2.1, right? Do the inspection levels in Table 8.1.1 correspond to the respective quality grades? In my understanding, the testing ratio is determined from 50184, while the acceptable grade for the welds is determined from 47013. I’m not sure if this is correct; please feel free to offer any criticism or corrections!
Generally, NBT47013-2015 for non-destructive testing of pressure equipment is used
Non-destructive testing of pressure equipment per NBT47013-2015
In terms of ratio, the 20801 seems better.
What type of product it is can be determined by its design and construction specifications. . . Take your time to see how 47013 is done and what meets the requirements.