API Std 650 insulated tanks seismic use group ii

The business department is mainly responsible for communicating with customers, from the manufacturing of steel plates, steel pipes and other products, knowing customers' needs and processing conditions, etc. within the time agreed with customers, the delivery time is short, the price is the most competitive, and the service is the best. Their responsibilities are to deal with customer consultation, solve customer problems, update production plans, and instruct the logistics department to deliver products to customers.

When the day light gradually decreases, the temperature of oil in the API Std 650 insulated tanks will also decrease, the evaporation speed will gradually slow down, and the pressure in the API Std 650 insulated tanks will also decrease. When the pressure in the API Std 650 insulated tanks is lower than the negative pressure rating of the breathing valve, the outside air is sucked into the API Std 650 insulated tanks through the open vacuum valve, which is the "suction" process of the oil tank.

Proof Tests for Establishing Allowable Working PressuresBecause pressures in liquid storage tanks built according to these rules vary quite markedly from the tops to the bottoms of the tanks, proof testing of these tanks presents problems not usually encountered in the construction of unfired pressure vessels–especially where the API Std 650 insulated tanks parts under investigation are located near the bottoms of the tanks. The principal difficulty is devising a test or series of tests that will reliably establish the working pressure that can be permitted on the part of the unproven design without, at the same time, imposing hazardous conditions on other parts located at higher levels in the tank.