长输管道干线相连法兰泄漏治理

Exploration on Selecting Treatment Schemes of Flange Leakage Linked with The Trunk of Long Distance Transmission Pipeline

以川气东送某输气站场与干线相连法兰泄漏为例,通过对带压封堵处理、碳纤维复合材料修复、应力消除紧固法以及卡具封堵技术治理方案进行对比分析,总结出如有沉降应力因素影响,应先消除相应管段应力作用,在做好防护措施前提下,实施高压卡具注胶封堵技术消除漏点。在对川气东送某输气站场实际应用处理泄漏时,采取了应力消除紧固法进行处理,最终成功消除了此处与干线相连接的泄漏点。

Taking the leakage of the flange connected to the gas field and the trunk of a gas transmission station from Sichuan to East China as an example, the paper compares and analyzes the pressure seal- ing, the carbon fiber composite material repair, the stress elimination and fastening technology and the plugging technology. If the settlement stress factors, should first eliminate the role of the corresponding pipe stress, under the premise of good protective measures, such as the implementation of high - pres- sure plastic injection plugging plugging technology to eliminate leakage. During the actual application leaking to a gas station in Sichuan - Sichuan Gas Transmission Station, the stress - relief tightening method was adopted for the treatment. Finally, leakage point connected with the main line was suc- cessfully eliminated.