PPR Pipe Extrusion Line

The SUHUI PPR pipe extrusion line is a specialized manufacturing system for producing polypropylene random copolymer (PPR) pipes in single-layer and multi-layer configurations (3–5 layers), widely used in hot and cold water supply, heating systems, and industrial fluid transport. Multi-layer PPR pipes can incorporate glass fiber reinforcement, aluminum foil barrier layers, or thermal insulation layers for enhanced performance in demanding applications.

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. The line also supports production of PE-RT (polyethylene of raised temperature resistance) and PB (polybutylene) pipes with the same equipment.

This fully automated line integrates precision extrusion, vacuum sizing, Siemens PLC control, 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

• 3–5 Layer Multi-Layer Capability: The line supports single-layer standard PPR pipe and multi-layer configurations with 3 to 5 layers — enabling production of glass fiber reinforced PPR, aluminum foil barrier PPR, and insulated composite pipe structures.
• Multi-Material Compatibility: Optimized screw geometry supports stable extrusion of PPR, PE-RT, PB, and MPP materials — all on the same platform with minimal changeover.
• European Gearbox & SEW Motor Drive: European gearbox design with SEW motor drive and ABB inverter ensures stable torque output and energy-efficient operation across the full speed range.
• Siemens PLC Control System: Automatic electric control system based on Siemens PLC with HMI for full line monitoring, parameter storage, and fast product changeover.
• Special Ceramic Heater & Nickel-Plated Adaptor: Ceramic heater zones for precise temperature control; nickel-plated adaptor between extruder and die for corrosion resistance and uniform melt flow.
• Multi-Stage Vacuum Calibration: Precision vacuum calibration sleeves fix outer diameter and ensure smooth internal and external pipe surfaces.
• Excellent Sleeve Water Cooling System: Double loop European style filter, water level control, and water flow meter provide stable closed-loop cooling to 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.
• Color Changeover Support: Modular die and feed system allows quick color changes between green, white, and gray PPR pipe production runs.
• Certified to International Standards: CE, ISO9001:2008, QS, GMP, and Soncap certified. Machine warranty: 13 months.

Technical Data – PPR Pipe Extrusion Line 33 Series

Technical Data – PPR Pipe Extrusion Line 38 Series

Configuration, die, and downstream equipment are matched to your specific pipe diameter range, layer structure, and output requirement. Contact SUHUI for a complete line proposal.

PPR Pipe Extrusion Process Workflow

1. Material Drying & Feeding: PPR, PE-RT, or PB pellets and color masterbatches are dried if required, then fed into the extruder(s) via precision gravimetric hoppers. For multi-layer production, each layer has an independent extruder and material feed.
2. Extrusion & Die Forming: The single-screw extruder(s) melt the compound via ceramic heater zones and force it through a co-extrusion die head, ensuring uniform circumferential melt flow distribution for consistent wall thickness across all layers.
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 a closed-loop multi-stage water cooling system with double loop European style filtration, water level control, and water flow meters, 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 with ABB inverter 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.

Frequently Asked Questions

What pipe diameters does the SUHUI PPR pipe extrusion line support?

The SUHUI PPR pipe extrusion line supports pipe outer diameters from Φ20 mm to Φ250 mm. The 33-series standard models cover Φ20–63 mm, Φ20–110 mm, Φ40–160 mm, and Φ50–250 mm ranges. The high-performance 38-series supports the same diameter ranges with higher output capacity and optional dual-outlet configurations for simultaneous two-pipe extrusion. Die and calibration tooling changes are required when switching between significantly different diameter ranges.

What materials and pipe types can the line produce?

The SUHUI PPR pipe extrusion line is optimized for PPR (polypropylene random copolymer) but also supports stable extrusion of PE-RT (polyethylene of raised temperature resistance), PB (polybutylene), and MPP materials using the same platform. In multi-layer configurations (3–5 layers), the line can produce glass fiber reinforced PPR composite pipe, aluminum foil barrier PPR pipe, and thermal insulation composite pipe structures — all on the same equipment with appropriate die and tooling setup.

What is the difference between the 33-series and 38-series PPR extrusion lines?

The 33-series is the standard PPR extrusion line with single-outlet configuration and maximum output of 180–330 kg/h depending on pipe diameter range, suited for conventional production volume requirements. The 38-series is a high-performance line with an enhanced extruder screw design (length/diameter ratio 38:1 vs. 33:1) that delivers higher output — up to 450 kg/h — faster haul-off speeds up to 20 m/min, and is available in dual-outlet configurations that simultaneously extrude two pipes for significantly increased production efficiency per line.

How does the vacuum calibration system ensure consistent PPR pipe dimensions?

The vacuum calibration sleeve creates a controlled low-pressure environment that draws the soft molten pipe against a precision-machined inner bore immediately after it exits the die. The calibration bore defines the exact outer diameter and surface finish of the pipe. Simultaneous water cooling at the calibration stage rapidly solidifies the outer pipe wall while it is held to dimension, locking in the target outer diameter and wall thickness before the pipe enters the downstream cooling tanks.

Can the line produce PPR pipes in different colors?

Yes. The SUHUI PPR pipe extrusion line supports green, white, and gray PPR pipe production — the three most common colors used globally for hot water (green), cold water (white/gray), and heating system (gray) applications. Color changes are made by adding color masterbatch to the hopper formulation. The modular die and barrel design supports quick color changeover with minimal purging waste between production runs.

What quality tests are applied to finished PPR pipes from this line?

Finished PPR pipes from the SUHUI line undergo hydrostatic pressure testing at 2.5× the rated working pressure for a minimum of 1 hour to verify pressure integrity. Dimensional checks confirm outer diameter, wall thickness, and pipe length against specification tolerances. Visual inspection identifies surface defects including voids, flow lines, and contamination. For export production, third-party certification testing to ISO 15874 or ASTM F2389 can be arranged to support product registration and market approval in target markets. The machine itself is certified CE, ISO9001:2008, QS, GMP, and Soncap.