12m diameter API standard 650 stainless and carbon steel tank
API standard 650 stainless and carbon steel tank construction must adhere to the design drawings, acceptance specifications and construction plans. If the design needs to be modified during API standard 650 stainless and carbon steel tank construction, it must be approved by the original design unit or Party A’s representative and relevant personnel of the supervision unit, and written visa procedures must be completed in advance. The equipment and main materials used in the oil tank construction project must have certificates of conformity and quality assurance.
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 stainless and carbon steel tank 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.
This specification, in conjunction with API 650 Standard, prescribes minimum standards for the API standard 650 stainless and carbon steel tank design, supply fabrication, erection, and testing of field erected welded steel storage tanks complete with accessories as specified herein and as shown on attached datasheets and/or drawings.
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