Materials used in the construction of API 650 open-top tanks

During heavy rain, closely observe the change of the water level in the storage area of the API 650 open-top tanks. If the water level rises to the dangerous range, drain the water immediately. There are more thunderstorms in heavy rain, and lightning protection devices should be installed in the API 650 open-top tanks area to avoid lightning accidents. Observe the groundwater level of the API 650 open-top tanks area at any time, clean and dredge the drainage ditch in time to ensure unobstructed drainage, and prevent the bottom of the API 650 open-top tanks from leaking and rusting due to untimely drainage

Changes in Tank ShapeIf in any of the foregoing tests there is an excessive rise of the bottom of the tank around the boundary of contact with grade, or off its foundations, or if any of the specified conditions of test loading cause other appreciable changes in the shape of the tank, the design shall be reviewed and means shall be provided in the tank for holding the shape within permissible limits under all conditions of loading,API 650 open-top tanks. Additional TestsThe tests prescribed in API 620 tank 7.18 are believed to be sufficient for most tanks constructed according to these rules; if, in the opinion of the designer, additional tests are needed to investigate the safety of a tank under certain other conditions of loading, as determined from the design computations, these tests shall be made on the tank involved in addition to the tests specified in this standard.

Floating roofs shall comply with API standard 650, Appendix C (Attachment 01) or with the API 650 open-top tanks requirements as layed (laid )down in the national Chinese specifications SH3046-92 and GBJ128-90.

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