ISO 8066的本部分规定了橡胶或热塑性塑料软管和软管组件的要求 汽车空调系统中的循环液体和气体R134a（四氟乙烷）。软管 软管组件的设计应能限制制冷剂损失和空气污染 系统工作温度范围为40°C至+125°C。 由于该应用中软管和联轴器之间的关键关系，要求 规定了用于服务和测试。

This part of ISO 8066 specifies the requirements for rubber or thermoplastic hoses and hose assemblies used for circulating liquid and gaseous R134a (tetrafluoroethane) in the air-conditioning systems of automobiles. The hoses and hose assemblies are designed in such a way as to restrict losses of refrigerant and contamination of the system. The operational temperature range is _ 40 °C to +125 °C. Due to the critical relationship between the hose and coupling for this application, a requirement that the coupling to be used in service be used for testing is laid down.