Number of Class D designs
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Is there a minimum number of designs required during the validity period of the Class D design qualification for pressure vessels?
I’ve never heard of the quantity; the variety should cover it all.
There is no explicit rule, but it must be held every year. It’s too little; having evidence from the unit isn’t useful either.
Each type is required; otherwise, there will be no representative works during the next review.
If the quantity is too small, it’s not cost-effective to collect evidence. There’s no need for that either.
At the very least, it should be there; then it depends on how close your relationship is with the institution, haha