... : ISO 4429 and BS6920Certification: ISO9001, ISO14001, OHSAS18001Applications: water supply, industrial liquids transportation and sewage treatmentHDPE Pipe Application:1 ... health non-toxic, not fouling, more suitable for urban water supply main conduit and buried tube, safety, hygiene, ... interior walls result in lower pressure loss and higher volume than metal pipeLongevity: more than 50 years under ...