Method for replacing leakage valve through pressure tapping and leaking stoppage of amine liquid medium pipeline

The invention relates to the field of maintenance, first-aid repair and transformation of petroleum and natural gas pipelines, in particular to a method for replacing a leakage valve through pressure tapping and leaking stoppage of an amine liquid medium pipeline. The method comprises the following steps of 1, pipeline tapping, 2, pipeline plugging, 3, leakage valve replacing and 5, tapping plugging, and solves the problems that production is delayed, starting and stopping loss of devices and equipment is large, and the method is not economical when leakage valves are replaced in a shutdown mode in the prior art. 本发明涉及石油天然气管道的维护、抢修、改造领域，特别是一种胺液介质管道带压开孔堵漏更换泄漏阀的方法，包括以下步骤：三通管焊接步骤1）；管线开孔步骤2）；管线封堵步骤3）；泄漏阀更换步骤4）；开孔堵塞步骤5）；解决了现有采用停工方式更换泄漏阀门，延误生产，装置设备启停损耗大，不经济的问题。