乙烯工业 ›› 2018, Vol. 30 ›› Issue (3): 31-33.

• 工业技术 • 上一篇    下一篇

乙烯装置蒸汽凝液管线带压包焊安全技术探索

李少林、潘延君、甘桂根、薛新超、刘泽涵   

  1. 中国石油天然气股份有限公司独山子石化分公司,新疆 独山子 833700
  • 收稿日期:2017-11-11 接受日期:2018-03-21 出版日期:2018-09-28 发布日期:2018-09-28
  • 作者简介:李少林,男, 2009年毕业于南京工业大学化学工程与工艺专业,工学学士,现从事乙烯生产运行及车间管理工作,副主任工程师。

Exploration on Repair Welding with Pressure Technology for Steam and Condensate Pipelines in Ethylene Plant

Li Shaolin, Pan Yanjun, Gan Guigen, Xue Xinchao, Liu Zehan   

  1. PetroChina Dushanzi Petrochemical Company, Dushanzi, Xinjiang, P.C.833699
  • Received:2017-11-11 Accepted:2018-03-21 Online:2018-09-28 Published:2018-09-28

摘要: 现代化化工企业有装置规模大、连续不间断生产的特点。蒸汽、凝液管道出现泄漏在无法进行能量隔离、释放且风险可控的情况下需要进行在线包焊作业。为防止泄漏蒸汽、凝液管道在包焊时发生不可控破裂泄漏,焊接前除了需对管道进行宏观检查、支吊架冷热态检查、测厚检查、弯管不圆度测量、硬度检测、蠕胀测量外,必要时还需应力计算,以确定施焊点的最小壁厚和焊条直径。具备焊接条件后,还需注意带压包焊时各个动火部位不宜同时进行,前一处动火部位的封堵、焊接工作完成后,方可进行下个部位的封堵、焊接等工怍。

关键词: 蒸汽及凝液管道, 减薄, 带压包焊

Abstract: Modern chemical enterprises are featured by large-scale unit and continuous production. If there is a leak in the steam and condensate pipelines, online repair welding is required when energy isolation and release is impossible and risk is controllable. In order to prevent the uncontrolled rupture and leakage of the steam and condensate pipelines during repair welding, in addition to the macro inspection of pipelines, the cold and hot state inspection of supports and hangers, the thickness measurement, the out-of-roundness measurement of bends, the hardness test and the creep test, stress calculations are required if necessary to determine the minimum wall thickness and the electrode diameter of the weld. After the welding conditions are met, it is also necessary to pay attention to the fact that the fire work should not be carried out at the same time during the welding with pressure. Only after the blocking and welding of a hot part is completed can the next hot part be blocked and welded.

Key words: steam and condensate pipeline, thinning;, repair welding with pressure