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The only way to get a plus rating is to non destructively measure the wall thickness (ultrasonically) at least 20+ times. Derive the average wall thickness and apply it to the formulas in the CFRs. Then find a sympathetic hydro tester willing to check your math and use your results to apply the plus.That is my purpose, for the + rating. Thanks.
The only way to get a plus rating is to non destructively measure the wall thickness (ultrasonically) at least 20+ times. Derive the average wall thickness and apply it to the formulas in the CFRs. Then find a sympathetic hydro tester willing to check your math and use your results to apply the plus.
Yes most hydro shops are not going to accept your hand derived REE even if you are a licensed engineer specializing in materials science - they want a number published by the manufacturer to cover their butts. Norris never published these so you are SOL.By reading here, and by multiple hydro techs I talked to, they all indicated that they need REE to be able to test for + rating, and they don't have it for Noris.
rjack321 described how you can establish the REE number yourself. honestly, it is a lot of extra effort for little gain.
Yes most hydro shops are not going to accept your hand derived REE even if you are a licensed engineer specializing in materials science - they want a number published by the manufacturer to cover their butts. Norris never published these so you are SOL.