本欧洲标准规定了用于制冷系统，热泵和二次冷却和供暖系统的固定管道的材料，设计，制造，测试和文件的要求。这些制冷系统和热泵系统在本标准中被称为EN 378-1中定义的制冷系统。 1.2本欧洲标准适用于包括焊接或钎焊附件的管道，直到并包括法兰，螺纹，焊接或钎焊连接器或焊接或钎焊在第一圆周接头连接管道或其他元件上的边缘。 1.3本欧洲标准适用于在制冷循环的各个阶段期间保护管道的安全附件的选择，应用和安装。 1.4本欧洲标准适用于以下管道: - 用于冷却或加热管道方面主要的空气的管道的热交换器; - 结合到组件中的管道（例如，独立的系统，冷凝单元）; - 现场竖立管道。 1.5本欧洲标准适用于内部压力低至1巴的管道，以便在充满制冷剂之前排除管道。 1.6本欧洲标准a

1.1 This document specifies the requirements for material, design, manufacturing, testing and documentation for stationary piping intended for use in refrigerating systems, heat pumps and secondary cooling and heating systems. These refrigerating systems and heat pump systems are referenced in this document as refrigerating systems as defined in EN 378-1:2016. The term "refrigerating system" used in this document includes heat pumps. 1.2 This document applies to piping, including welded or brazed attachments up to and including the flanges, screwed, welded or brazed connectors, or to the edge to be welded or brazed at the first circumferential joint connecting piping or other elements. 1.3 This document applies to the selection, application and installation of safety accessories intended to protect the piping during the various phases of the refrigeration cycle. 1.4 This document applies to the following piping: - heat exchanger consisting of piping for the purpose of cooling or heating air where piping aspects are predominant; - piping incorporated into an assembly (e.g. self-contained system, condensing unit); - field erected piping. 1.5 This document applies to piping with an internal pressure down to -1 bar, to account for the evacuation of the piping prior to charging with refrigerant. 1.6 This document applies to both the mechanical loading conditions and thermal conditions as defined in EN 13445 3:2014/A5:2018 associated with refrigerating systems. It applies to piping subject to the maximum allowable temperatures for which nominal design stresses for materials are derived using EN 14276-1:2020 or as specified in this document. In addition, piping designed to this document will have a maximum design temperature not exceeding 200 °C and a maximum design pressure not exceeding 160 bar. Outside of these limits, the EN 13480 series can be used for the design construction and inspection of the piping. Under these circumstances, the unique nature of a refrigerating plant, as indicated in the introduction of EN 14276-1:2020, will also be taken into account. 1.7 This document applies to piping where the main pressure bearing parts are manufactured from metallic ductile materials as defined in Clause 4 and in EN 14276-1:2020.