Butt weld and flanged valves have the same end - to - end dimensions for class 300 and up 300磅级以上的对焊和法兰阀门具有相同的面到面尺寸。
2.
Face - to - face and centre - to - face dimensions of flanged valves shall be as in table 4 for other than [ b ] [ red ] oblique pattern globe [ / red ] [ / b ] or oblique pattern lift check valves 除了斜角式球形止回阀和斜角式提升止回阀之外，法兰阀门的面对面尺寸和中心对面尺寸已在表4中给出。
