Comparative analysis and study on technical route unification of welding procedure qualification standard between NB/T 20002.3 and NB/T20450.3 in nuclear power industry

核能行业焊评标准NB/T 20002.3与NB/T 20450.3的比较分析和技术路线统一研究 Comparative analysis and study on technical route unification of welding procedure qualification standard between NB/T 20002.3 and NB/T20450.3 in nuclear power industry 王宇欣 WANG Yuxin 1 first-author 马迎兵 MA Yingbing 1 高宇 GAO Yu 1 李哲 LI Zhe 1 张跃 ZHANG Yue 2 中国核电工程有限公司 中国核电工程有限公司 China Nuclear Power Engineering Cooperation,Ltd. China Nuclear Power Engineering Cooperation,Ltd. 生态环保部核与辐射安全中心 生态环保部核与辐射安全中心 Nuclear and Radiation Safety Center Nuclear and Radiation Safety Center 焊接工艺评定标准是焊接标准领域最核心、最基础的标准。目前国内三代核电存在两份焊评标准NB/T 20002.3和NB/T 20450.3,这增加了设计制造成本和监管难度,也不利于出口。本文比较了两份标准内容范围差异,关于检验试验项目及验收要求、焊接变素、覆盖范围等主要技术分歧,同时对差异项进行分析研究,并在此基础上给出标准统一的建议。焊接工艺评定标准技术路线统一的开创性研究工作,对于完善我国核电标准体系,提升标准自主化水平,促进我国核电"走出去"具有重要的现实意义。 Welding procedure qualification is the core and basic standard in the field of welding standard. At present,there are two welding procedure qualification standards in China,NB/T20002.3 and NB/T 20450.3,which increases the cost of design and manufacturing and the difficulty of supervision,and is not conducive to export. In this article, the differences in the scope of two standards,and the main technical differences about the inspection and acceptance requirement,welding variables and coverage are compared,analyzed and studied. Finally route unification solutions are given. The pioneering work on technical route unification of welding procedure qualification standards has great practical significance for perfecting the standard system of nuclear power in China,improving independence of the standard and facilitating the "go global" of China’s nuclear power. NB/T 20002.3 NB/T 20450.3 焊接工艺评定 技术路线统一 TG44;TM623 2022-03-08 11 50