... : High flow capacity, endurable, nontoxic,pressure proof PVC Drainage Pipes: Thickness* Dia.=mm*mm8.0*400 6 ... .0*50 1.8*40 Main charactricstics1. PVC-U is a rigid unplasticized material with good ... as high compressive rating and pipe safety factor2. PVC-U has good aging resistance with normal lifetime ... coefficient of linear expansion of , thermal expansion of pvc-u pipe is less than polyolefin by , low ...