Acceptable grade for head butt welds
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The equipment requires 20% RT inspection, while the welds at the head joints need 100% RT inspection. Should these welds be classified as grade II or grade III?
The welding joint coefficient used in the calculation of end caps: a coefficient of 1.0 corresponds to grade II, while a coefficient of 0.85 corresponds to grade III; this is for reference only
This issue has already been discussed on the forum.
The qualified level is the same as that of the main equipment.
If it’s designed according to national standards, it’s completely correct
Generally speaking, under normal circumstances, the 2nd floor is sufficient. However, there are certain situations and devices with special conditions: for some important components, although only partial testing is carried out, it is necessary to raise the acceptance standard to level 2 ； For some, conduct a full inspection and lower the pass level to Level 3! Such as spliced end caps.
I agree with you; under the current system of lifelong responsibility, it is necessary in my opinion to raise the standards for individuals
For the situation mentioned by the original poster, a level III qualification is sufficient