... pipe PPR-Steel pipe 1.ISO9001 2.Size(mm):20 to 75 3.Quickly connection 4.Inner wall is smooth,quick flow Composite pipe ... PPR-Steel pipe Size(mm): 20,25 32,40,50,63,75Brand ... connection and recyclable materials.2. Unlike copper-plastic composite pipe, PP-R pipe can have heavy caliber pipes produced, with a maximum ...