5086 aluminum tube API standard 650 aluminum tanks

When API 650 storage tank is designed, when the design pressure is small F2 kPa, the impact of air pressure on the API standard 650 aluminum tanks tank wall thickness is not considered in the tank wall design.

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Butt-welded joints used to fabricate large steel storage tank fittings shall be completely radiographed. Lines carrying liquid shall be hydrostatically or pneumatically pressurized at a minimum pressure of 35 lbf/in.2 and API standard 650 aluminum tanks butt welded joints shall be simultaneously visually examined (hydrostatic) or solution film tested (pneumatic) for tightness. If manufactured pipe has been hydrostatically tested previously to ASTM requirements, then only circumferential welds need to be examined.