![]() There is not much to say about this issue, apart that just having a look at Figure 1 for easiness. Do the number of settlement measurement locations and maximum spacing, calculated in. The diametrical lines shall be spaced at equal angles, with a maximum separation measured at the tank circumference of 10 m (32 ft). A minimum of four diametrical lines shall be used. Introduction and Workbook API-653 - Inspection, Repair, Alteration, & Reconstruction API-650. Measurements shall be made at maximum intervals of 3 m (10 ft) measured on diametrical lines across the tank. Internal bottom elevation measurements shall be made before and after hydrostatic testing. N is the minimum required number of settlement measurement points.ġ) The maximum spacing between settlement measurement points shall be 32 ft.īefore any hidrostatic test, elevation measurements should be taken inside the tank, as stated in 7.3.6.8 of API 650 In a tank, the number of settlement points around the periphery for external settlement measurement is given by the following formula DETERMINING THE NUMBER OF POINTS FOR SETTLEMENT MEASUREMENT The inspector should be able to calculate the number of survey points for determining tank settlement.Īt least one question on this matter will show up in the exam. If you want to become a certified API 653 inspector, this is what the body of knowledge for the 2015 API 653 certification exam asks from you This is a short post, written to teach you how to calculate the number of points for settlement measurement around a tank. ![]()
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