? 应用规范 Application Norm:
1. 设计制造按 12236-89
Design Manafacfure According to 12236-89
2. 结构长度按 GB 12221-89规定
Face to Face According to GB
122221-89
3. 法兰型式及尺寸 JB/T79-94
End Flange Dimenaion Accoring to
JB/T79-94
4. 阀门检查和试验按 API STD.598
Valve Check and Test According TO API
