... smooth outside and inside wall, and little internal stress.4Producing pipe limit Φ20-Φ160 mm , manufacture velocity up to ... be used to produce HDPE silicon core tube ,ordinary PP-R, PEand PEX pipes.6.Low cost :The cost ... & ribbon width Φ65,33:1Φ65,30:1 Φ75,33:1 Φ75, 30:1 Output 120kg/h 220kg/h Linear velocity ... capability 58 85 Productivity for year 350 150 production line for stable PPR pipe machinery