... ISO 4429 and BS6920Certification: ISO9001, ISO14001, OHSAS18001Applications: water supply, industrial liquids transportation and sewage treatmentHDPE Pipe Application:1 ... non-toxic, not fouling, more suitable for urban water supply main conduit and buried tube, safety, hygiene, ... years under proper useRecycled and Environment-friendly PE80 Water Supply Pipe SDR33, PN0.4MPaSDR21, PN0.6MPaSDR17, PN0 ...