1.1目的这些推荐规程为流体动力应用中的碳、合金和高强度低合金钢管组件的设计和制造提供了一般性建议，使用了常用的制造方法和管道选择和应用的一般指南。1.2应用领域这些推荐规程适用于工业设备和商业产品的一般应用和液压系统。本文件编制期间未考虑飞机和航空航天应用。 由于许多因素会影响液压系统正常工作时的压力，因此这些推荐做法不应被解释为保证最低压力。对于任何应用，用户和供应商都应进行充分的测试和审查，以确保达到所需的性能水平。在规定的压力和温度极限之外的条件下，应咨询制造商使用这些推荐做法和连接器。 应考虑公制和英制管道，以满足液压系统设计要求。在过去，这些要求主要通过英寸管道来满足；对于新设计，应考虑公制管道。

1.1 PurposeThese recommended practices provide general recommendations for designing and fabricating carbon, alloy and high strength low alloy steel tube assemblies for fluid power applications utilizing commonly available manufacturing methods and general guidelines for tube selection and application.1.2 Field of ApplicationThese recommended practices are intended for general application and hydraulic systems on industrial equipment and commercial products. Aircraft and Aerospace applications were not considered during the preparation of this document. Because many factors influence the pressure at which a hydraulic system will perform satisfactorily, these recommended practices should not be construed as guaranteed minimums. For any application, sufficient testing should be conducted and reviewed by both the user and supplier to ensure that required performance levels are met.The fabricator should be consulted for use of these recommended practices and connectors in conditions outside the pressure and temperature of limits specified. Both metric and inch tubing should be considered to accommodate hydraulic system design requirements. In the past, these requirements have been met predominantly with inch tubing; for new designs, metric tubing should be considered.