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api 620 crude oil steel storage tanks welding procedure and welder qualifications

api 620 crude oil steel storage tanks welding procedure and welder qualifications

api 620 crude oil steel storage tanks welding procedure and welder qualifications

Strictly control the welding groove forming of api 620 crude oil steel storage tanks: in order to ensure the geometric dimension of assembly and good welding of welding seam, before hoisting and laying, the edge of all metal vertical storage tank plate shall be polished by grinder, and the flatness of plate shall be ensured according to the design requirements. Strictly control the size of api 620 crude oil steel storage tanks weld assembly: measures must be taken to strictly control the assembly size of metal vertical tank bottom plate during assembly.

refrigerated tanks secondary components are those whose failure would not result in leakage of the liquid being stored. Secondary components also include those api 620 crude oil steel storage tanks components that are not in contact with the refrigerated liquid but are subject to the refrigerated temperature vapors and have a combined tensile and primary bending stress under design conditions that does not exceed 6000 lbf/in.2. Secondary components that could be designed within this reduced stress are roof plates, including roof manways and nozzles with their reinforcement, roof-supporting structural members, and shell stiffeners.

The welded steel API 650 storage tank api 620 crude oil steel storage tanks is designed, manufactured and installed on the surface according to the API standard system classification. API 650, API620 and API 12D belong to the API standards for professional construction.

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