ISO 2531:2009规定了适用于管道施工用球墨铸铁管、配件、附件及其接头的要求和试验方法: -输送水（例如供人类饮用和原水）， -有压力或无压力操作，以及 -安装在地下或地上。 它规定了管道、配件和附件的材料、尺寸和公差、机械性能和标准涂层。它还提供了包括接头在内的所有部件的性能要求。 ISO 2531:2009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制造的管道、配件和附件，以及尺寸范围为DN 40至DN 2600（含）的相应接头。

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.