本SAE推荐实践的目的是建立移动式CFC-12(R-12)空调(A/C)系统替代制冷剂选择的具体标准。本文件提供了候选制冷剂鉴定指南。要求包括实验室和现场测试。替代制冷剂应提供与本文定义的CFC-12(R-12)相当的系统性能。车辆试验应在拟使用制冷剂的代表性车辆制造商的产品线上进行，如循环离合器节流孔管、恒定运行节流孔管、循环离合器膨胀阀或连续运行膨胀阀制冷剂系统。 只有结合SAE J1657的要求，本文件才是完整的。

The purpose of this SAE Recommended Practice is to establish the specific criteria for the selection of a replacement refrigerant for mobile CFC-12 (R-12) air-conditioning (A/C) systems. This document provides guidelines for qualifying candidate refrigerant. The requirements include laboratory and field testing. The alternate refrigerant shall provide comparable system performance as CFC-12 (R-12) as defined herein. The vehicle testing shall be conducted on representative vehicle manufacturer’s product line, in which the refrigerant is intended to be used, such as cycling clutch orifice tube, constant run orifice tube, cycling clutch expansion valve, or continuous run expansion valve refrigerant system. This document is complete only when combined with the requirements of SAE J1657.