NB-T 20216-2024 压水堆核电厂核辅助系统管道安装技术规程

ICS 27.120.99 CCS F63 NB 中华人民共和国能源行业标准 NB/T 20216—2024 代替 NB/T 20216-2013 压水堆核电厂核辅助系统管道安装技术规程 Technical regulations for PWR nuclear power plant auxiliary system piping installation 2024 - 09 - 24发布 2025 - 03 – 24实施国家能源局发布 NB/T 20216 —2024 I 目次前言 ................................ ................................ ........... III 1 范围 ................................ ................................ ................. 1 2 规范性引用文件 ................................ ................................ .......1 3 术语和定义 ................................ ................................ ........... 1 4 总则 ................................ ................................ ................. 2 5 通用技术要求 ................................ ................................ ......... 2 总要求 ................................ ................................ ........... 2 施工材料的要求 ................................ ................................ ...2 切割下料 ................................ ................................ ......... 3 产品焊接 ................................ ................................ ......... 3 6 支架预制 ................................ ................................ ............. 5 支架部件的成形 ................................ ................................ ...5 支架组装 ................................ ................................ ......... 5 支架焊接 ................................ ................................ ......... 5 支架检查、检验 ................................ ................................ ...6 表面处理 ................................ ................................ ......... 6 贮存 ................................ ................................ ............. 6 7 管道预制 ................................ ................................ ............. 6 管道部件的加工 ................................ ................................ ...6 管道弯制 ................................ ................................ ......... 6 管道的组对 ................................ ................................ .......7 管道焊接 ................................ ................................ ......... 7 检查和检验 ................................ ................................ .......7 表面处理 ................................ ................................ ......... 7 贮存 ................................ ................................ ............. 8 完工图 ................................ ................................ ........... 8 8 支架安装 ................................ ................................ ............. 8 支架的安装偏差要求 ................................ ............................... 8 支架基板及锚固螺栓的安装 ................................ ........................ 10 支架一阶段的安装 ................................ ................................ 12 NB/T 20216 —2024 II 二阶段支架的安装 ................................ ................................ 16 9 管道安装 ................................ ................................ ............ 18 管道及附件的安装要求 ................................ ............................ 18 法兰的安装要求 ................................ ................................ ..19 阀门的安装要求 ................................ ................................ ..20 管道及其部件的焊接 ................................ .............................. 20 标识 ................................ ................................ ............ 23 清洁 ................................ ................................ ............ 23 无损检验 ................................ ................................ ........ 25 现场补漆 ................................ ................................ ........ 25 安装完工试验 ................................ ................................ ....25 10 竣工文件 ................................ ................................ ........... 26 附录 A （资料性）推荐的支架焊缝接头类型 ................................ .......27 A.1 对接焊缝尺寸要求 ............................