A420 grade WPL6 pipe API Std 650 carbon and low-alloy steel tanks

After the API Std 650 carbon and low-alloy steel tanks is manufactured, air tightness test and water filling test are carried out according to the design requirements, and the pipeline must be subjected to pressure test to fully meet the acceptance technical specifications. Improve the quality assurance system, adhere to the principle of who constructed is responsible for the quality of the project, conduct regular quality inspections, and immediately rectify any problems. Fill in the API Std 650 carbon and low-alloy steel tanks installation technical records in time to ensure the synchronization, integrity and reliability of the technical data.

A refrigerated tank may be a single-wall insulated tank or a double-wall tank that consists of an inner tank for storing the refrigerated liquid and an outer tank that encloses an insulation space (which usually has a lower gas pressure) around the inner tank. A double-wall tank is a composite tank, and the outer tank is not required to contain the product of the inner tank. In a double-wall tank, differences in API Standard 620 tank materials, design, and testing exist between the inner and outer tanks.

Welding certification is regulated by Section 10 of the American Society of Mechanical Engineers (ASME). For both API Std 650 carbon and low-alloy steel tanks storage tank API 650, non-destructive inspection is required, but third-party inspection is not required.

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