Hello everyone. According to API 650 paragraph 18.104.22.168 it is necessary to make some internal measurements in the tank before and after the hydrotest. What I understand is that with these measurements we could estimate some internal settlement at the bottom of the tank... but is there any tolerance for this? What is this code point for? Or are these values that one must maintain so that during a future intervention of the tank in operation, we can make a comparative between data and see settlements over time?
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