It is pointed out that the plugging and freezing of breather valve, variation in parameters and operation conditions of oil tank and human factors result in the shrink of oil tank.
指出导致油罐抽瘪的主要原因是呼吸阀堵塞和冻结、油罐参数和工艺条件发生变化以及操作失误等。
For deficiencies of its structure, the previous breather valve with fire protection is not suitable for installing on light oil storage tank at cold area.
原使用的轻质油储罐防火呼吸阀，由于结构缺陷，不宜使用于寒冷地区储油罐上。
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