Quantitative Analysis of Fit-up Accuracy for Field Narrow Gap Orbital TIG Welding of Primary Piping in PWR Nuclear Power Plants

GUO Lifeng; WANG Quan; DONG An

Mar. 2025

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GUO Lifeng, WANG Quan, DONG An. Quantitative Analysis of Fit-up Accuracy for Field Narrow Gap Orbital TIG Welding of Primary Piping in PWR Nuclear Power Plants[J]. Nuclear Power Engineering, 2012, 33(2): 139-144.

Citation:

GUO Lifeng, WANG Quan, DONG An. Quantitative Analysis of Fit-up Accuracy for Field Narrow Gap Orbital TIG Welding of Primary Piping in PWR Nuclear Power Plants[J]. Nuclear Power Engineering, 2012, 33(2): 139-144.

Citation:

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Quantitative Analysis of Fit-up Accuracy for Field Narrow Gap Orbital TIG Welding of Primary Piping in PWR Nuclear Power Plants

China Nuclear Power Engineering Co., Ltd., Beijing, 100840, China

Received Date: 2010-11-29
Rev Recd Date: 2011-10-12

Available Online: 2025-03-08

Abstract

Abstract

Field Narrow Gap Orbital TIG（NGOT） welding of the primary piping requires much more strict fit-up accuracy.To satisfy this requirement,a 3-D geometric computer model was developed to conduct the quantitative analysis of the relationship between fit-up accuracy and variables in the manufacture and in-stallation process.The essential variables were identified and recommendations were given for the construc-tion program based on the analysis results.
- Primary piping,
- Narrow Gap Orbital TIG welding,
- Fit-up accuracy,
- Quantitative analysis