设计与制造 Design and Manufacture
结构长度 Face to face/End to end
法兰尺寸 Flange Dimension
对焊连接尺寸Butt welding dimension
压力-温度 Pressure Temperature Lating
试验-检验Inspection and Test
ANSI B16.34 BS1873
ANSI B16.10
ANSI B16.5
ANSI B16.25
ANSI B16.34
API 598
J40H美标法兰截止