ASTM A1011 grade 33 sheets API Std 650 storage tank

API 620 crude oil tank piping materials made according to ASTM A333 and A350 may be used at API Std 650 storage 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.

API 650 internal floating roof oil tank executive standard: domestic design standard: GB50341-2003 "Vertical cylindrical steel welded oil tank design code"; domestic construction standard: GB50128-2005 "vertical cylindrical steel welded oil tank" Construction and Acceptance Specification; API Std 650 storage tank Foreign design standard: API650-2007 "Standard for Welded Steel Petroleum Storage Tanks."

Requirements for prefabrication of bottom plate of large vertical API Std 650 storage tank:
1. The diameter of tank bottom should be enlarged by 0.1% ~ 0.15% according to the design diameter.
2. The minimum dimension of edge plate along the radius direction of tank bottom shall not be less than 700mm.
3. The distance between any adjacent welds of the base plate shall not be less than 300 mm.