45ft diameter API standard 650 flexible liquid storage tanks

Generally speaking, the duration of the "exhalation" of the API standard 650 flexible liquid storage tanks is longer than that of the "inhalation" of the API standard 650 flexible liquid storage tanks 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 flexible liquid storage tanks location, open area of the API standard 650 flexible liquid storage tanks, atmospheric pressure, filling degree of API standard 650 flexible liquid storage tanks, etc. When the API standard 650 flexible liquid storage tanks 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 insert plate weld shall not cross any shell seams and shall be at least the greater of 10 times the shell thickness or 12 in. from any other weld in the API standard 650 flexible liquid storage tanks shell including shell seams, shell-to-bottom weld or attachment welds. The butt weld around the periphery of the plate shall be examined over 100% of its length by both liquid penetrant method and radiographic method. The liquid penetrant examination is required on the root pass, on the back-gouged surface, and on the inside and outside finished weld surfaces. Additionally, the weld shall be vacuum box leak tested.

API 650 petroleum storage tank body design is mainly the design of tank bottom, API standard 650 flexible liquid storage tanks tank top and tank wall, and the design of tank wall is particularly important. As the main pressure bearing part of API 650 petroleum storage tank, the tank wall bears loads including liquid pressure, wind pressure, seismic load, opening stress, etc. The calculation of such loads is explained in detail in various API standard 650 flexible liquid storage tanks storage tank design standards. But in addition, the API 650 petroleum storage tank wall also bears the push-pull force and torque of the connected pipeline.