应用规范：

1、设计、制造按GB/T12238-1989

2、结构长度按GB/T12221-2005

3、连接法兰：JB/T79-1994

4、阀门检查和试验按JB/T9092-1999

Note：

1、Design Manufacture According to GB/T12238-1989

2、Face to Face According to GB/T12221-2005

3、End Flange Dimension According to JB/T79-1994

4、Valve Check And Test According to JB/T9092-1999

结构：

    B.B浮动结构、防火、防静电

Structure：

    two pieces， fire-proof structure，antistatic design