API Std 650 mechanically-anchored flat-bottom tanks dimensional tolerances

Tanks which are designed following rules and guidelines of API 650 are API 650 tanks. API 650 API Std 650 mechanically-anchored flat-bottom tanks 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 mechanically-anchored flat-bottom tanks Tanks must be above ground with a closed or open top.

Suggested Practice Regarding Installation of Low-pressure Storage Tanks
Access: All openings and accessories for tanks API Std 650 mechanically-anchored flat-bottom tanks constructed according to this standard shall be installed so that any periodic inspections required can be readily made.
Corrosion: When a tank bottom rests directly on the ground, a survey shall be made to establish the need for cathodic protection.
Drainage: All tanks in which water might accumulate under the hydrocarbon contents shall be provided with adequate drains that are suitably protected from freezing.

Proper use of API Std 650 mechanically-anchored flat-bottom tanks and precautions:
1. The API Std 650 mechanically-anchored flat-bottom tanks must be used within the safe height range;
2. Check before use to ensure that the safety valve and breathing valve are flexible and easy to use;
3. The explosion-proof and fire-proof safety measures for oil tanks are implemented effectively;
4. The oil level in the API Std 650 mechanically-anchored flat-bottom tanks should be accurately measured when receiving and delivering oil, so as to prevent overflow or empty;
5. In the process of receiving and sending oil, the flow rate of oil should be controlled, and it should not be too fast to avoid electrostatic accidents.

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