A516 Gr 415 plates API standard 650 stainless and carbon steel tank

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According to the standard of head of API standard 650 stainless and carbon steel tank, there should be no crack, delamination, inclusion and other defects on the groove surface, which is consistent with the steel plate standard. The API standard 650 stainless and carbon steel tank head polishing can adopt different technology according to different requirements, including rough polishing, medium polishing and fine polishing. Only the materials used for the third type of pressure vessels must be retested, and the materials used for the first and second class pressure vessels are not generally re inspected.

API 620 crude oil tank piping materials made according to ASTM A333 and A350 may be used at API standard 650 stainless and carbon steel tank design metal temperatures no lower than the impact test temperature required by the ASTM specification for the applicable material grade without additional impact tests. For temperatures below those allowed by the ASTM specification, the following paragraph shall apply.