What is the container quality grade?
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What is the quality grade of the container? ? What does quality grade mean? Not lower than Grade III, not lower than Grade II, not lower than Grade II
Really don’t know that? ? Only know the non-destructive testing quality grade! Who knows, learning *learning*!
That is the non-destructive testing grade, not the quality grade of the container.
As mentioned above, it is likely the non-destructive testing grade for pressure vessel welds~~~
I also assume that what the original poster is referring to is the non-destructive testing grade; the evaluation grades for the safety status of pressure vessels during regular inspections are grades 1, 2, 3, 4, and 5