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Thanks Siggi, As you say PR1 and PR2 is differ as compare to amount of testing. so in PR1 how many testing required also in PR2 how many testing Required?

Hello All, I am making a drill stem (TYPE-A) sub according API 7-1 & 7-2. There is information about marking recess in the 7-1. But there is no dimensional info. about the recess. Qustion-1 I need Depth, width and length of recess or (any Code which is giving info. about recess dimension).

Thanks for your valuable replay, we are doing hydrotest like primary test and secondary test only. qustion-1 : Can you explain what is the validation test cycle like 3-cycle and 200-cycle. qustion-2 : Is Spools (Adapter and spacer) required PR ?

I read API6A code but i confused in PR Requirements, Qustion-1: How we can decide which product belong to which PR ? Qustion-2: How a Product differ from PR1 and PR2 Please Help me out to solve this problem.

I read API6A code but i confused in PR Requirements, Qustion-1: How we can decide which product belong to which PR ? Qustion-2: How a Product differ from PR1 and PR2 Please Help me out to solve this problem.

any other suggestion how to calculate bending stress (Sb)?

Hii, in API 16A and 16C closure bolting given, Bolt tensile stress based on the minimum cross-sectional area of the bolt and stud,shall not exceed the following limit 1)Sa ≤ 0.83Sy 2)Sb ≤ 1.0Sy Sa = is the maximum allowable tensile membrane stress Sb = is the maximum allowable tensile...