... .Standard: GB, ISO 3.Low flow capacity, endurable PVC water supply pipe (PN0.63) with high quality 1.Material; PVC2.Standard: GB ... and tensile resistance, as well as high compressive rating and pipe safety factor 2. PVC-U has good aging resistance with ... coefficient of linear expansion of ,thermal expansion of pvc-u pipe is less than polyolefin by, low thermal conductivity and elastic ...