Quality control of large diameter thin-walled stainless steel pipeline welding in-service in nuclear power station

XIA Jun; LI Jie; MIN Yulong; CHEN Yingjie; FENG Xingwang; LIU Chao

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Quality control of large diameter thin-walled stainless steel pipeline welding in-service in nuclear power station
Vol. 49, Issue 4, Pages: 216-221(2019)
Published：2019
DOI：
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DOI：

XIA Jun, LI Jie, MIN Yulong, et al. Quality control of large diameter thin-walled stainless steel pipeline welding in-service in nuclear power station[J]. Eletric Welding Machine2019, 49(4): 216-221. DOI：

摘要

不锈钢薄壁管道广泛用于核电站辅助管道系统

是在役核电维修中的重要项目

其焊接质量直接影响核电的运行质量。在役核电站维修中对于大口径不锈钢薄壁管道的焊接存在充氩困难、管道变形、根部氧化等问题。重点论述了通过氩气室的选择和效果验证、使用合适的管道组对方法和采用合适的焊接方法和工艺参数

以及焊接过程中的关键点验证

能够确保大口径不锈钢薄壁管的焊接质量

并在中广核多个电站机组大修中得到应用

具有良好的适用性。

Abstract

Thin-walled stainless steel pipes are widely used in auxiliary systems of nuclear power stations. They are important items in nuclear power welding in service

and their welding quality affects the operation quality of nuclear power plants.This paper mainly introduces the welding technology characteristics and difficulties of thin-walled stainless steel pipes with large diameter in nuclear power stations. It is emphasized that the welding quality of large diameter stainless steel thin-walled pipe can be ensured by the selection of argon chamber

the validation of effect

the use of appropriate pipe group

the adoption of appropriate welding methods and process parameters

and the key point validation in the welding process. This method has been applied in many nuclear power stations in Guangdong Nuclear Power Group of China and has good applicability.