Identificação de qualidade de tubo PPR

A tubulação PPR real deve obedecer as normas de GB/T18742-2002< plastic="" piping="" systems="" for="" hot="" and="" cold="" water="" --pp="" second="" "part="" of="" the="" pipe="" fittings="" shall="" conform="" to="" the="" requirements="" of="" the="" gb/t18742-2002="" --pp="" plastic="" piping="" systems="" for="" hot="" and="" cold="" water="" pipe,="" the="" third="" part;="" the="" performance="" of="" pseudo="" ppr="" pipes="" and="" pipe="" fittings="" is="" not="" through="" the="" standard.="" it="" should="" be="" pointed="" out="" that="" the="" life="" span="" of="" the="" pseudo="" ppr="" tube="" is="" only="" 1-5="" years,="" and="" the="" real="" life="" of="" the="" ppr="" tube="" is="" over="" 50="">