Design of socket welding joint of instrumentation pipes in nuclear power plant

WANG Lanlan; WANG Heng; ZHANG Le

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Design of socket welding joint of instrumentation pipes in nuclear power plant
Vol. 49, Issue 4, Pages: 250-253(2019)
Published：2019
DOI：
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DOI：

WANG Lanlan, WANG Heng, ZHANG Le. Design of socket welding joint of instrumentation pipes in nuclear power plant[J]. Eletric Welding Machine2019, 49(4): 250-253. DOI：

摘要

核电厂仪表管道插套焊接头在长期服役中存在疲劳开裂失效的风险

其接头质量关乎核电厂的安全运行。从应用场合、焊前轴向间隙设计、焊接过程控制要求、焊后焊脚尺寸、焊后检测等方面明确了仪表管插套焊接头设计应遵循的基本要求

提出相应的焊接工艺控制措施

以保证仪表管道插套焊接头的长期可靠服役。为仪表管插套焊接头的规范化设计制造提供了可借鉴的技术指导。

Abstract

Socket welding joints of instrumentation pipes have the risk of fatigue cracking failure in nuclear power plants during long service period. The quality of these joints is related to the safe operation of nuclear power plants. This paper presented the basic requirements of design of socket welding joints of instrumentation pipes from the aspects of suitable application

axial clearance before welding

welding process during welding

leg sizes and non-destructive tests after welding

etc. At the same time

the corresponding welding technology measures were put forward based on these requirements

and adopting these measures would ensure that socket welding joints of instrumentation pipes would be in long-term reliable service. It can provide recommendable technical guideline for normalized designing and manufacturing of socket welding joints of instrumentation pipes.