Small Diameter HDPE Multi Layer Composite Pipe Extrusion Line is designed for the efficient and high-speed production of high-density polyethylene (HDPE) pipes, widely used in water supply, gas distribution, drainage systems, telecommunications, and industrial applications. This production line integrates advanced extrusion technology, precision control systems, and high-performance downstream equipment to ensure consistent pipe quality and stable operation.
Main Components of Multi Layer Composite Pipe Extrusion Line
The material handling system consists of vacuum loaders and four drying hoppers, designed to accurately convey and dry raw materials including PE, EVOH, and adhesive layers. This guarantees high material purity and process stability, providing a reliable foundation for consistent extrusion quality.
Extrusion System:
Equipped with five single-screw extruders for independent feeding of each pipe layer.
JWS65/33: Outer PE layer, 120–150 kg/h
Two JWS35/25: EVOH and adhesive layers, 3–8 kg/h
JWS30/28: Inner PE layer
JWS25/25: Four color stripes, 3–5 kg/h
Efficient and precise multilayer extrusion.
Forming & Sizing System:
The die set (including die head and mandrel) fuses five layers of materials into a preliminary pipe shape. A 9-meter vacuum sizing tank uses negative pressure for rapid calibration, while a 9-meter spray cooling tank ensures further cooling and solidification, guaranteeing high dimensional accuracy - with chipless cutting precision up to ≤5 mm.
Downstream System:
A three-claw caterpillar haul-off unit (servo motor-driven) provides stable line speed control (0.3–8 m/min). The chipless cutter ensures precise cutting, and a single-station coiler collects finished pipes in an organized manner. Integrated with a hot stamping printer (with length marking accuracy of ±0.3%), the system achieves fully automated, closed-loop operation with clear product marking.
Advantages of Multi Layer Composite Pipe Extrusion Line
Multilayer Co-extrusion Technology:
By integrating independent extruders with precision dies, materials such as PE, EVOH, and adhesive layers are seamlessly bonded. The five-layer structure is formed in a single process, increasing production efficiency by over 30% compared to conventional methods.
Intelligent Control System:
Equipped with a Siemens PLC control cabinet, all operating parameters (such as screw speed and temperature) can be preset and stored. It also features safety alarms including motor overload and torque over-limit protection (automatic shutdown after 3 minutes at 105% torque), ensuring stable and controllable production at all times.
High Precision Assurance:
From raw material ratios (e.g., EVOH at 5–6%) to final product dimensions (pipe diameter 50–125 mm, supporting SDR9 to SDR21), as well as cutting and printing accuracy - the entire process maintains millimeter-level tolerances to meet stringent industry standards.
Flexible Operation & Support:
Remote commissioning services are prioritized, with fast-response on-site support available when needed. The entire system includes a one-year warranty and lifetime maintenance. A full stock of spare parts (e.g., screw disassembly tools, heating rings) minimizes downtime risk.
Application Industries
With its outstanding performance, the products of the small-diameter five-layer HDPE pipe production line are widely used in:
Gas Transportation:
The EVOH barrier layer effectively prevents gas leakage, while the conductive layer eliminates static electricity. Ideal for gas stations and municipal gas pipeline networks.
Cable Protection:
Featuring high compression resistance, corrosion resistance, and flame retardancy, these pipes provide reliable protection for underground cables against external damage.
Municipal & Industrial Applications:
Suitable for small-scale water supply systems and chemical fluid transportation pipelines, capable of adapting to complex working environments.
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