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Minimum thickness calculation

Minimum thickness calculation

(OP)
I am trying to clarify if performing a calculation for t-min. on a vessel, when inputing the pressure(P), would you use the MAWP/design from the dataplate or U-1 form only, or would you add the static head to the MAWP.

Question 2: After performing t-min calcs, would you add the corrosion allowance to the result or just use the calculated t-min by itself.( I was taught to add the corrosion allowance to the Radius in the calculation and was wondering if this was the same as adding at the end or not)

Question 3: Like in the first question but now calculating for MAWP, would you add the static head to the result?

I have heard different opinions on these questions and I want to be sure to use the correct way of doing things.

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