GB/T 13295-2019 代替 GB/T 13295—2013
水及燃气用球墨铸铁管、管件和附件
Ductile iron pipes 9 fittings and accessories for water or gas applications (ISO 2531：2009,Ductile iron pipes, fittings, accessories and their joints for water applications* MOD)
2019-12-10 发布
2020-04-01 实施
目 次
前言..........................................1
1范围..........................................1
2規范性引用文件.....................................1
3术语和定义.......................................2
4技术要求........................................5
4.1总则.......................................5
4.2压力、壁厚分级和尺寸要求.............................7
4.3材料性能....................................12
4.4外涂层与内衬..................................13
4.5标记......................................14
5密封度求.......................................14
5.1管和管件....................................14
5.2柔性接口................................... 14
5.3铸造、螺纹连接、焊接和松套法兰接口...................... 16
6试验方法.......................................17
6.1 尺寸.....................................17
6.2管的直线度...................................18
6.3拉伸试验....................................18
6.4布氏硬度....................................20
6.5管和管件的工厂密封试验.............................20
6.6涂层和内衬...................................21
7型式试验.......................................22
7.1总则......................................22
7.2内压力下接口密封................................22
7.3外压力下接口密封................................22
7.4负内压下接口密封................................23
7.5循环压力下接口密封...............................23
7.6法兰接口的密封性和机械应力...........................23
8工厂检验与质址证明书.................................24
8.1检査和验收...................................24
8.2组批规则....................................24
8.3取样数址....................................24
8.4质址证明书...................................24
9尺寸表.........................................25
9.1承插管......................................25
9.2法兰接口管....................................28
9.3承接管件.....................................28
9.4盘接管件.....................................66
附录A （资料性附录）本标准章条编号与ISO 2531:2009 #条编号对照......83
附录B （资料性附录）本标准与ISO 2531,2009技术性差异及其原因........86
附录C （资料性附录）允许压力 .............................89
附录D （资料性附录）压力等级管的尺寸..........................92
附录E （规范性附录〉管的壁厚、径向刚度和径向变形 ...................94
附录F （资料性附录）外部防腐 .............................101
附录G （资料性附录）内部防腐..............................102
附录H《资料性附录）安全系数 ..............................103
附录1（规范性附录）质址保证...............................104
酎录J （资料性附录）凝水紅...............................105
参考文献.........................................108