液化气站建成后交付生产或运行多年进行定期检修,需要预先进行置换。近年来,在我国使用400立米球罐的单位较为普遍,根据国务院有关文件的指示精神,400立米球罐都要求开罐检查,返修存在隐患的焊缝。这就给从事液化气管理工作的同志提出了一个带有普遍性的课题:置换问题。本文拟就这个问题谈谈我们的看法。 After the liquefied gas station is completed, it will be delivered for production or operation for many years to carry out regular maintenance, and it needs to be replaced in advance. In recent years, the use of 400-millimeter spherical tanks in our country is relatively common. According to the instructions of the State Council, the 400-millimeter ball tanks all require opening inspections and rework of hidden welds. This raises a common topic for comrades engaged in liquefied gas management: replacement issues. This article intends to talk about our views on this issue.