EN 13476-3:2018
无压地下排水和污水塑料管系统.未增塑聚氯乙烯(PVC-U),聚丙烯(PP)和聚乙烯(PE)结构壁管系统.第3部分:B型,有平滑内外表面的管和配件及系统用规范
Plastics piping systems for non-pressure underground drainage and sewerage - Structured-wall piping systems of unplasticized poly(vinyl chloride) (PVC-U)@ polypropylene (PP) and polyethylene (PE) - Part 3: Specifications for pipes and fittings with smooth