API 650 self-anchored storage tanks machine welding

This API 650 tank standard is designed to provide industry with tanks of adequate safety and reasonable economy for use in the API 650 self-anchored storage tanks storage of petroleum, petroleum products. and other liquid products.

For all API 620 crude oil tank other materials, the impact test temperature shall be at least 30°F colder than the design metal temperature. Alternately, materials impact tested at the design metal temperature or lower with Charpy impact test energy value of 25 ft-lb (average), 20 ft-lb (minimum) are acceptable for design metal temperatures above –40°F. API 650 self-anchored storage tanks materials with an energy value of 30 ft-lb (average), 25 ft-lb (minimum) are acceptable for design metal temperatures of –40°F or lower.

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