【国家标准】 埋地排水排污用聚丙烯(PP)结构壁管道系统　第2部分：聚丙烯缠绕结构壁管材

This part of GB/T 35341 specifies the terms，definitions，symbols and abbreviations，material，pipe classification，designation of wall construction and jointing methods，requirements，test methods，inspection rules，marking，transportation and storage of polypropylene(PP)spirally enwound structure-wall pipes(hereinafter referred to as pipes)for underground drainage and sewage.
This part is applicable to the spirally enwound structure-wall pipes made from polypropylene(PP)resin with auxiliary supporting-structure of polymeric material(generally polypropylene).Information of fittings(solid wall structure)is also provided.
This part is applicable to systems of polypropylene spirally enwound structure-wall pipes for non-pressure underground drainage and sewage with a long-term working temperature up to 45℃.By taking into account of the chemical and thermal resistance of the material，it can also be used in non-pressure systems for industrial underground drainage and sewage.