输水和输气用球墨铸铁管、配件、附件及其接头

[中文适用范围]： 本国际标准规定了用于建造输送水（例如用于人类饮用和原水）的管道的球墨铸铁管、管件、附件及其接头的要求和试验方法。这些管道在有压或无压条件下运行，可安装在地面以下或地面以上。注：在本国际标准中，所有压力均为以 bar 表示的相对压力。本国际标准规定了管材、管件和附件的材料、尺寸和公差、机械性能以及标准涂层。它还给出了包括接头在内的所有组件的性能要求。本国际标准适用于通过任何类型的铸造工艺铸造或通过铸造部件制造而成的管、管件和附件，以及相应接头，尺寸范围为 DN 40 至 DN 2600（含）。它适用于具有承口、法兰或插口端（接头设计和垫圈形状不在本国际标准范围内）的管、管件和附件，通常内外均涂有涂层。管、管件和附件根据允许的操作压力进行分类。 [外文原描述]： ISO 2531:2009 specifies the requirements and test methods applicable to ductile iron pipes, fittings, accessories and their joints for the construction of pipelines: - to convey water (e.g. for human consumption and raw water), - operated with or without pressure, and - installed below or above ground. It specifies materials, dimensions and tolerances, mechanical properties and standard coatings of pipes, fittings and accessories. It also gives performance requirements for all components including joints. ISO 2531:2009 applies to pipes, fittings and accessories cast by any type of foundry process or manufactured by fabrication of cast components, as well as corresponding joints in the size range DN 40 to DN 2600 inclusive.