制冷系统和热泵 - 确定组件和接头的密封性

[中文适用范围]： 本文件规定了制冷系统和热泵用绝热和封闭部件、接头和零件的型式试验资格鉴定程序。这些部件包括ISO 5149系列相关部分中所述的金属柔性管。它指定了组件整体及其装配的紧密程度等级，如制造商所规定的。它对可以被认定为绝热接头的机械接头规定了额外要求。本文件适用于最大DN 50的接头和内部体积最大为51且重量不超过50 kg的组件。它适用于制冷装置中使用的绝热和封闭部件、接头和零件（例如：配件、爆破片、法兰或固定式装配），无论其材料和设计如何。本文件不适用于非金属材料制成的柔性管的紧密性。这在ISO 13971中另有规定。在本文件发布之日前进行测试并被发现符合ISO 14903:2017的组件被视为符合本文件。 [外文原描述]： This document specifies the qualification procedure for type approval of the tightness of hermetically sealed and closed components, joints and parts used in refrigerating systems and heat pumps as described in relevant parts of the ISO 5149 series, including metal flexible piping. It specifies the level of tightness of the component as a whole and its assembly as specified by the manufacturer. It specifies additional requirements for mechanical joints that can be recognized as hermetically sealed joints. This document is applicable to joints of maximum DN 50 and components of internal volume of maximum 5 l and maximum weight of 50 kg. It is applicable to the hermetically sealed and closed components, joints and parts (e.g. fittings, bursting discs, flanged or fitted assemblies) used in the refrigerating installations, including those with seals, whatever their material and design are. This document does not apply to the tightness of flexible piping made from non-metallic material. This is covered in ISO 13971. Components tested before the date of publication of this document and found to comply with ISO 14903:2017 are considered to comply with this document.