本标准操作规程适用于灰铸铁 带有法兰或螺纹端的闸阀。 本标准操作规程涵盖了 尺寸和压力温度额定值 此处规定用于一般用途。 该标准实践还包括:， 直接或通过引用，对 材料的化学和物理性质， 以及 常用。

This Standard Practice covers gray iron gate valves with flanged or threaded ends. This Standard Practice covers valves in sizes and pressure-temperature ratings specified herein for general purpose service. This Standard Practice also includes, directly or by reference, stipulations on chemical and physical properties of materials, and dimensions of end connections in common use.