API 653 FORMULAS Key Revision Questions and CORRECT Answers
Linings- Typically anchor profile of steel surface required for the installation of a tank bottom lining 652: 7.5 1.5-4.0 mils Welds- Maximum undercut of a vertical weld & nozzle weld 650: 8.5.2.b 1/64" Welds- Maximum undercut of a horizontal weld 650: 8.5.2.b 1/32" Welds- Maximum diameter of a surface porosity cluster 650: 8.5.2.c 3/32" Weld Qualification- Max allowed discontinuity in a bend test IX: QW-163 1/8" Nameplates- Minimum size of name plate letters 650: 10.1.1 & 653: 13.1.1.1 5/32
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