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某页岩气平台管道失效原因分析
Analysis of Failure’s Gas in Certain Shale Gas Platform

DOI: 10.12677/ME.2023.111014, PP. 104-113

Keywords: 页岩气,失效分析,氢含量,氢裂
Shale Gas
, Failure Analysis, Content of Hydrogen, Hydrogen Cracking

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Abstract:

某页岩气平台出站管道投产后短时间内发生管段失效事件,为找出该段管线失效的原因,分析了材料理化性能、腐蚀产物形貌成分测试结果及失效焊缝氢含量情况,认为失效焊缝存在一定程度的焊接余高超标等现象,这些问题会引起焊缝应力集中;且焊接时富含水的铁锈进入熔敷金属中导致焊缝氢含量超标。管道焊缝的应力集中和焊缝中氢含量超标会促进裂纹的发展,造成管道焊缝快速失效。
The perforation of a gas platform pipeline occurred when it goes into operation in a short time in certain shale gas platform pipeline. For founding the reason of gas pipeline corrosioin failure, combined with the physical and chemical properties of materials and the test results of the mor-phology and composition of corrosion products, the content of hydrogen in the weld. There hap-pened high welding residual in occurred pipeline is exceed standard, those situations may make the weld stress concentrated. And the rust full of water in the welding line makes the content of hydrogen excessive. With the effect of high stress and the content of hydrogen excessive, pitting of gas platform pipeline developed rapidly.

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