PRODUCTS

The SUHUI PPR pipe extrusion line is a specialized manufacturing system for producing polypropylene random copolymer (PPR) pipes, widely used in hot and cold water supply, heating systems, and industrial fluid transport. PPR pipes offer high-temperature resistance up to 95°C, excellent corrosion immunity, and long-term pressure durability — making them the preferred choice for modern plumbing and building infrastructure.

This fully automated line integrates precision extrusion, vacuum sizing, and multi-stage cooling to ensure smooth inner and outer surfaces with consistent wall thickness. It supports pipe diameters from Φ20 mm to Φ250 mm, compliant with ISO 15874 and ASTM F2389 standards. Color variants including green, white, and gray are supported with quick changeover capability.

SUHUI offers two PPR extrusion line series: the standard 33-series for conventional output requirements, and the high-performance 38-series for higher throughput and dual-outlet configurations up to 450 kg/h.

Key Features of SUHUI PPR Pipe Extrusion Line

• PPR-Optimized Screw Design: Single-screw extruder with optimized screw geometry for uniform PP melting at 220–260°C, minimizing thermal degradation and ensuring consistent melt quality.
• Multi-Stage Vacuum Calibration: Precision vacuum calibration sleeves fix outer diameter and ensure smooth internal and external pipe surfaces.
• Closed-Loop Cooling System: Three to four-stage water cooling tanks with temperature control prevent pipe warping and relieve internal stress during solidification.
• Servo-Driven Haul-Off: Precision servo motor maintains stable line tension and consistent wall thickness uniformity across all pipe diameters.
• Laser / Inkjet Marking: Integrated marking system permanently prints pipe specifications including size, pressure rating, standard compliance, and batch codes.
• Flying Saw Cutting Unit: Synchronized flying saw cuts pipes to precise lengths without stopping the line, ensuring burr-free ends.
• Dual-Outlet Configuration (38-Series): High-performance 38-series supports dual-pipe simultaneous extrusion, significantly increasing output per line.
• Energy-Saving Heaters: Insulated barrel and die heating zones reduce thermal loss and lower operating energy consumption.
• Color Changeover Support: Modular die and feed system allows quick color changes between green, white, and gray PPR pipe production runs.

Technical Data – PPR Pipe Extrusion Line 33 Series

Technical Data – PPR Pipe Extrusion Line 38 Series

PPR Pipe Extrusion Process Workflow

1. Material Drying & Feeding: PPR pellets and color masterbatches are dried if required, then fed into the extruder via a precision gravimetric hopper for consistent material flow.
2. Extrusion & Die Forming: The single-screw extruder melts the PPR compound and forces it through a spiral mandrel die, ensuring uniform circumferential melt flow distribution for consistent wall thickness.
3. Vacuum Sizing: The molten pipe exits the die and enters a vacuum calibration sleeve that fixes the outer diameter and surface finish to the target specification.
4. Cooling & Annealing: The pipe passes through three to four stages of water cooling tanks, gradually reducing temperature to relieve internal stress and stabilize final dimensions.
5. Surface Marking: A laser or inkjet marking unit prints pipe specifications — including outer diameter, wall thickness, pressure rating, standard compliance, and production batch code — onto the pipe surface.
6. Haul-Off & Cutting: A servo-controlled caterpillar haul-off unit pulls the pipe at a precise, adjustable speed, followed by a synchronized flying saw that cuts pipes to the specified length without interrupting production.
7. Testing & Packaging: Finished pipes undergo hydrostatic pressure testing (2.5× rated pressure for 1 hour), visual inspection, and dimensional checks before being bundled or coiled for delivery.