本标准涵盖了石油、化工和天然气工业服务中使用的包括平行轴正齿轮和斜齿轮的通用封闭式单级和多级齿轮机构的最低要求。根据本标准制造的通用齿轮和挤出机齿轮的节线速度不得超过60 m/s（12000 ft/min）。

This standard covers the minimum requirements for general-purpose, enclosed single and multistage gear units incorporating parallel shaft spur, and helical gears for use in the petroleum, chemical, and gas industry services. General-purpose and extruder gears manufactured according to this standard are limited to pitch line velocities that do not exceed 60 m/s (12,000 ft/min).