Analysis method for perforation reinforcement
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How should clause e of 6.6.1 in GB/T150.3-2011, which states that \"Weld joints of types A and B within the reinforcement area shall not have any defects exceeding the specified limits,\" be understood? How to proceed during design?
The qualification level for testing is determined in accordance with the non-destructive testing standards applicable to the equipment, and it is the same as that of the equipment itself
As long as the location of the opening is not too awkward, during the process planning, for welds of type A and B, it is possible to provide a reinforcement area equal to 2 times the diameter of the opening. For these A and B class welds that cannot be avoided, flaw detection is necessary, and the inspection result must be at grade 2 or above. That’s why it’s best to combine design with manufacturing work; it can avoid many problems later on.
The entire device? Where is the basis?
Do you mean 100% inspection of Class A and Class B weld joints within the opening area, with a second-level acceptance standard?
Yes, it means that the weld here does not weaken the material. Because in hole calculation, the weld coefficient within the default calculation range is set to 1, which corresponds to a 100% inspection standard with grade 2 as acceptable. If the weld coefficient in the reinforcement calculation is adjusted artificially, then that’s another matter.