... to 630mm pressure:0.4MPa to 1.6MPa material:pe 80, 100 Production process:Automatic feeding → heating ... Product DescriptionMaterial: PE80/ PE100 (now we mainly use pe 100).Sizes: 20mm--630mmSDR: SDR11,SDR13.6,SDR17, ... cracking, good creep resistance4.Good flexibility: small diameters PE pipe for water supply can be coiled and ... .Recyclable, benefit to the environment hdpe pipes manufacturer in China