提高山洞储油罐的控制压力,是从1965年以后开始进行的。以前,我们对油罐大小呼吸规律认识不够,因此所建油罐,有的没有设置呼吸阀;有的虽然设了呼吸阀,但质量差,不好使用,多是利用油气管线上的阀门来调节,曾多次发生过油罐罐底边缘上翘和罐体吸瘪事故。有的单位让油气管线上的阀门长期开启,使油罐畅通无阻的进行呼 Increasing the pressure on the control of cave storage tanks started after 1965. In the past, we did not know enough about the breathing pattern of the size of the tank. Therefore, some of the oil tanks built did not have a breathing valve installed. However, although some breathing valves were provided, the quality was poor and not good to use. Mostly, the valves on oil and gas pipelines were used Regulation, there have been many times on the tank bottom edge upturned tank suction deflated accident. Some units to long-term oil and gas pipelines on the valve, so that the tank unimpeded call