... .Standard: GB, ISO 3.Low flow capacity, endurable PVC Piping with gluing socket1.Material; PVC2.Standard: GB, ISO3.Low flow capacity, ... flow capacity, endurable, nontoxic, pressure-proof 1. PVC-U is a rigid unplasticized material with good surface rigidity and tensile resistance, as ... compressive rating and pipe safety factor 2. PVC-U has good aging resistance with normal lifetime up to 50 years 3. ...