管道带压焊接氢致裂纹的研究进展

Research Progress on Hydrogen-Induced Cracking of Pipeline In-Service Welding

在油气管道服役过程中,因油气对管道的腐蚀、冲刷出现管道壁厚局部减薄,或因机械损伤出现管道破损,需要对管线减薄及破损部位进行带压焊接修复。然而带压焊接时,因管内介质的压力、流速等作用,冷却速度加快,易产生氢致裂纹。本文从氢致裂纹的产生机理、影响因素、评价指标及预防措施等方面阐述管道带压焊中氢致裂纹问题的研究现状及进展,为相关人员提供参考。

During the service of oil and gas pipelines, the wall thickness of the pipeline is locally thinned due to the corrosion and erosion of oil and gas, or the pipeline is damaged due to mechanical damage. It is necessary to repair the thinned and damaged parts of the pipeline by in-service welding. However, during in-service welding, the cooling rate is accelerated due to the pressure and flow rate of the medium in the pipe, and hydrogen-induced cracks are prone to occur. The research status and progress of hydrogen-induced cracking in pipeline in-service welding were described in terms of the mechanism,influencing factors, evaluation indicators and prevention methods of hydrogen-induced cracking, which can provide reference for relevant personnel.