國標鍛鋼固定球閥

應用規范Application Specification

1、設計制造:GB/T 12237-2007

2、結構長度:GB/T 12221-2005

3、法蘭連接:JB/T 79-1994

4、檢驗試壓: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