... : ISO4427, ISO4437, GB/T 13663-2000 Certification: ISO9001, ISO14001Application: Water supply, Industries liquids transportation , sewage conduitIdentifies: black water pipe identifies the ... resistance.4.Good flexibility: small diameters PE pipe for water supply can be coiled and supplied for longer length, which saves ... , benefit to the environment HDPE pipe PE100 CRP100 for water supply black CMAX