应用规范Application Specification

1、设计制造:GB/T 12237-2007

2、结构长度:GB/T 12221-2005

3、法兰连接:JB/T 79-1994

4、检验试压:GB/T 13927-2008

1.Design and manufacturing: GB/T 12237-2007

2.Face to face: GB/T 12221-2005

3.Flange connecting: JB/T 79-1994

4. Inspection and testing: GB/T 13927-2008