城市燃气管道带压切接线施工技术探讨

Discussion on Construction Technology of Pressure Cutting Connection for Urban Gas Pipeline

燃气管道带压开孔是指在管道内天然气介质不停输带压的情况下焊接封堵管件(管线内的介质天然气,处于不停输状态),先安装夹板阀、开孔机等设备,在安全检查合格后,在燃气管道上钻孔,开孔大小与管道等径孔,也就是要求开孔直径与管道内径一致,以便于管道封堵。不停输封堵技术分为气囊式、皮碗式、膨胀桶式。

Pressure opening of gas pipelines refers to the welding and sealing of pipe fittings(natural gas in the pipeline is in a continuous transmission state)while the natural gas medium is under pressure in the pipeline.First,install equipment such as clamp valves and opening machines,and after passing the safety inspection,drill holes on the gas pipeline.The size of the holes should be the same as the diameter of the pipeline,which requires the diameter of the holes to be consistent with the inner diameter of the pipeline to facilitate pipeline sealing.The non-stop sealing technology is divided into airbag type,cup type,and expansion barrel type.