... is more than 15 years. All our products pass ISO9001:2000 certification and meet national quality standard. Also ... HDPE80 or HDPE100 Standard: GB/T13663-2000 Certification: ISO9001,ISO14001,OHSAS18001 FeaturesMaterial: high quality HDPE80 or HDPE100 ... joint,flanged joint Standard: GB/T13663-2000 Certification: ISO9001,ISO14001,OHSAS18001 Applications: water supply, industrial liquids transportation ...