API standard 650 cylindrical liquid-storage tank flat-face pipe flange

Generally speaking, the duration of the "exhalation" of the API standard 650 cylindrical liquid-storage tank is longer than that of the "inhalation" of the API standard 650 cylindrical liquid-storage tank every day. There are many factors affecting the "small breathing" loss, mainly including the following points: the change of temperature difference between day and night, sunshine time of the API standard 650 cylindrical liquid-storage tank location, open area of the API standard 650 cylindrical liquid-storage tank, atmospheric pressure, filling degree of API standard 650 cylindrical liquid-storage tank, etc. When the API standard 650 cylindrical liquid-storage tank is full of gas, the space volume is small, and the "small breathing" loss is less; if the space volume is large, the loss is also large.

The opening pressure or vacuum of the pressure relief and API standard 650 cylindrical liquid-storage tank vacuum relief valves shall be checked by pumping air above the water level and releasing the pressure and then partially withdrawing water from the tank. After the tank has been emptied of water and is at atmospheric pressure, the anchorage, if provided, shall be rechecked for tightness against the hold-down brackets. Air pressure, equal to the design pressure, shall be applied to the empty tank, and the anchorage, if provided, and the foundation shall be checked for uplift.

This specification, in conjunction with API 650 Standard, prescribes minimum standards for the API standard 650 cylindrical liquid-storage tank design, supply fabrication, erection, and testing of field erected welded steel storage tanks complete with accessories as specified herein and as shown on attached datasheets and/or drawings.