标准摘要
[中文适用范围]： 本文件规定了用于非开挖更换地下无压和有压排水和排污网络以及地下供水和供气网络的塑料管道系统的管材和管件的要求和试验方法，更换方式为通过管道爆破和管道抽取。它适用于制造的聚乙烯 (PE) 管道和管件，也适用于已安装的更换系统。本文件旨在与适用于 PE 管道系统建设的标准结合使用。对于制造的管道，它适用于三种不同的 PE 管道类型： - PE 实壁单层管（公称外径，dn），包括任何识别条； - 管道内外任一或两侧均有共挤层的 PE 管道（总外径，dn），如附件 A 所述，其中所有层均具有相同的 MRS 等级； — PE 管（外径，dn）在管外部具有可剥离的连续热塑性塑料附加层（“涂层管”），见附录 A。此外，它还适用于： — 通过对接熔接接头连接管段； — 通过电熔接头连接管段； — 由 PE 制成的装配和注塑配件。由其他塑料（例如玻璃增强塑料 (GRP)）制成的管道不在本文件的范围内。 [外文原描述]： ISO 21225-1:2018 specifies requirements and test methods for pipes and fittings which are part of plastics piping systems for the trenchless replacement of underground non-pressure and pressure drainage and sewerage networks and underground water and gas supply networks, by means of pipe bursting and pipe extraction. ISO 21225-1:2018 is applicable to polyethylene (PE) pipes and fittings, as manufactured, as well as to the installed replacement system. ISO 21225-1:2018 is intended to be used in conjunction with standards applicable for the construction of PE pipeline systems where available. Regarding manufactured pipes it is applicable to three different PE pipe types: - PE solid wall single layered pipes (nominal outside diameter, dn), including any identification stripes; - PE pipes with co-extruded layers on either or both the outside and inside of the pipe (total outside diameter, dn), as specified in Annex A, where all layers have the same MRS rating; - PE pipes (outside diameter, dn) having a peelable, contiguous, thermoplastics additional layer on the outside of the pipe ("coated pipe"), see Annex A. In addition, ISO 21225-1:2018 is applicable to: - jointing of pipe lengths by means of butt fusion joint; - jointing of pipe lengths by means of electrofusion joint; - fabricated and injection-moulded fittings made of PE. Pipes made from other plastics, e.g. glass reinforced plastics (GRP), are outside the scope of this document.
英文名称Plastics piping systems for the trenchless replacement of underground pipeline networks — Part 1: Replacement on the line by pipe bursting and pipe extraction