标准摘要
[中文适用范围]： SAE J3291涵盖了用于汽车空调系统中润滑剂、液体和气体制冷剂的包含和循环的软管和耦合软管组件。本推荐实践将用于建立对软管、软管组件或非金属管线组件的验证要求，这些组件用于汽车空调系统中考虑使用的任何新制冷剂或制冷剂混合物。 本文件涵盖的新制冷剂和混合物不包括当前使用的R134a、R1234yf和R152a制冷剂。本文件也不包括以前使用的R12制冷剂或用于超临界系统的制冷剂，如R744。 系统制造商有责任确保对新制冷剂、混合物和润滑剂组合与预期软管材料进行充分的兼容性测试。推荐测试包括但不限于体积膨胀、分层和快速减压。这些测试不包括在本推荐实践的范围内。 按照本推荐实践测试收集的数据在最终标准发布时将可接受，前提是测试方法或验收标准没有实质性变化。 根据SAE J2911的认证细节将在未来修订中包括。 [外文原描述]： SAE J3291 covers hoses and coupled hose assemblies intended for containing and circulating lubricant, liquid, and gaseous refrigerant in automotive air-conditioning systems. This recommended practice will be used to establish requirements for the validation of hoses, hose assemblies, or nonmetallic line assemblies with any new refrigerant or refrigerant blend being considered for use in automotive air-conditioning systems. The new refrigerants and blends covered by this document do not include current refrigerants R134a, R1234yf, and R152a. This document does not cover previously used refrigerant R12 nor refrigerants used in transcritical systems, such as R744. It is the system manufacturer’s responsibility to ensure that adequate compatibility testing is completed with new refrigerants, blends, and lubricant combinations together with intended hose materials. The recommended tests include, but are not limited to, volume swell, delamination, and rapid decompression. These tests are not included in the scope of this recommended practice. Data gathered while testing to this recommended practice shall be acceptable as applied to the final standard when released, providing that no substantive changes to the test methods or acceptance criteria have been made in the final standard. Details for certification per SAE J2911 will be included in a future revision.
英文名称Evaluation of Air Conditioning Hoses and Coupled Hose Assemblies using New Refrigerants or Refrigerant Blends