API 650 self-anchored tank supporting legs

In the petrochemical industry and other industries, large vertical API 650 self-anchored tank are often used to store various production raw materials. Usually, the medium with high melting point and easy to crystallize at room temperature can be exported and used after heating, which involves the heating of large vertical storage tanks. The heating system is an auxiliary facility for heating of large vertical storage tank. It is often necessary to design external heating coil or internal heating coil system.

The tank shall be filled with water to the design liquid level unless height is limited as noted in API 620 standard Q.8.1. After the tank is filled with water and before the pneumatic pressure is applied, anchorage, if provided, shall be tightened against the hold-down brackets. All welds in the API 650 self-anchored tank shell, including the corner weld between the shell and the bottom, shall be visually checked for tightness.

Corrosion allowance, if specified, shall be added to calculated API 650 tanks shell and self-supporting roof thicknesses; to minimum nominal thicknesses of bottom and supported API 650 self-anchored tank roof plates; to nozzles and manholes; and to all exposed surfaces of internal structural members and non-removable internals.

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