A537 Cl 1 plates API Std 650 carbon steel storage tanks
Crack treatment of API Std 650 carbon steel storage tanks weld area: find out the crack tip with ray or ultrasonic flaw detection, drill cut-off holes at both ends of the crack with the cut-off method, the hole depth is slightly greater than the crack depth, or groove (crack stop groove) is made by angle grinder at both ends of the crack, shovel and grind the whole crack, and grind it into a suitable groove; use radiographic inspection and dye detection to verify that the crack has been completely excavated, and finally repair welding.
The Charpy V-notch test shall be used, and the minimum impact value at the design metal temperature shall be as given in Table R-2. For subsize specimen acceptance criteria, see ASTM A20. An impact test temperature lower than the design metal temperature may be used by the API 620 welded storage tanks Manufacturer, but in such a case the impact values at the test temperature must comply with Table R-2.
Welded steel API Std 650 carbon steel storage tanks storage tanks that are designed, manufactured and installed on the ground are classified according to the API standard system. The three API standards API Std 650 carbon steel storage tanks all adopt on-site production and installation of storage tanks.
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