GB/T 24925-2019 代替 GB/T 24925—2010
低温阀门技术条件
Low temperature valve—Technical specifications
2019-10-18 发布
2020-05-01 实施
目 次
前言...........................................1
1范围............................................1
2规范性引用文件.......................................1
3术语和定义.........................................2
4结构型式..........................................2
5技术要求..........................................9
5.1 一般要求......................................9
5.2 性能.......................................10
5.3阀体........................................11
5.4  阀盖.......................................11
5.5 阀杆.......................................14
5.6启闭件和阀座....................................14
5.7填料和填料函...................................14
5.8中法兰密封..................................   15
5.9操作........................................15
5.10 材料......................................15
5.11铸钢件外观质匿..................................16
5.12缺陷处理.....................................16
5.13 无损检测....................................16
6试验方法.........................................17
6.1标志检验......................................17
6.2铸钢件外观质量...................................17
6.3尺寸检査......................................17
6.4化学成分......................................17
6.5力学性能......................................17
6.6 常温试验.....................................17
6.7低温试验......................................17
6.8低温循环寿命试验..................................20
6.9无损检测......................................20
6-10防静电试验....................................21
7检验规则.........................................21
7.1检验项目......................................21
7.2 岀厂检验.....................................21
7.3  型式试验.....................................21
8标志...........................................22
9涂漆、包装、运输和储存..................................22
附录A （资料性附录）低温阀门推荐选用材料表........................23
附录B （资料性附录）内冷循环原理图 ...........................25