警告-使用本文件的人员应熟悉正常的实验室实践。本文件并非旨在解决与其使用相关的所有安全问题（如有）。用户有责任建立适当的健康和安全实践，并确保遵守任何国家监管条件。本文件规定了用于在汽车空调系统中循环液体和气体R1234yf（四氟丙烯）的橡胶或热塑性软管和软管组件的要求。软管和软管组件的设计应能限制制冷剂损失和系统污染。工作温度范围为-40°C至+125°C。购买本文件时可提供的所有当前修改件均包含在购买本文件中。

WARNING — Persons using this document should be familiar with normal laboratory practice. This document does not purport to address all of the safety problems, if any, associated with its use. It is the responsibility of the user to establish appropriate health and safety practices and to ensure compliance with any national regulatory conditions.This document specifies the requirements for rubber or thermoplastic hoses and hose assemblies used for circulating liquid and gaseous R1234yf (tetrafluoropropene) 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.All current amendments available at time of purchase are included with the purchase of this document.