API Std 650 self-anchored tank constructed according to API Standard 650

Tanks which are designed following rules and guidelines of API 650 are API 650 tanks. API 650 API Std 650 self-anchored tank is the governing code for Welded tanks for Oil storage normally operating in the atmospheric pressure range. The code API 650 provides guidelines for design, fabrication, material, erection, and inspection of welded vertical and cylindrical storage tanks. Such API Std 650 self-anchored tank Tanks must be above ground with a closed or open top.

As we know, the vertical metal tank, API Std 650 self-anchored tank is welded by many components, and the welding quality of each component determines the later use effect of the API Std 650 self-anchored tank. Professional API Std 650 self-anchored tank manufacturers should have a set of professional skills in the welding process of API Std 650 self-anchored tank. Key points for weld inspection of vertical metal tank, API Std 650 self-anchored tank:
1. It is strictly forbidden to paint the welds before passing the inspection.
2. Visual inspection shall be carried out for welds.
3. NDT shall be carried out on the weld.

Investigation of Subgrade
On actual steel storage tank sites to be used, test borings or test pits, or both, may be made at the direction of a competent engineer who will specify the number and location. They need not be equally spaced but should be laid out to uncover possible weak spots.
In general, test loadings of subgrade at the bottom of test pits need be resorted to only when such heavy loading as may be imposed by footings for major column supports for spheres or similarly elevated API 620 low-pressure tanks is specified. Results may be deceptive if average load-bearing capacity over a considerable area is wanted. All field data shall be recorded with maps, and copies shall be supplied to all engineers concerned with design, erection, and later operation.

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