KITECH Completes HDPE Pipe Recycling Line Testing for Chilean Client

From heavily contaminated waste pipes to clean, high-value material, KITECH has completed pre-shipment testing of a customized HDPE pipe recycling line for a Chilean pipe manufacturer serving the fishery and aquaculture industries.

In the HDPE pipe recycling process, raw material quality plays a decisive role in the performance of subsequent extrusion operations. If used pipes are shredded/crushed and pelletized without adequate washing, soil, sand, oil, and other contaminants will be introduced into the extrusion system. These impurities not only cause black spots or visible specks on the finished products, but also lead to extrusion instability and ultimately compromise the Physical properties and surface quality of the end products — challenges that represent a core concern for most pipe manufacturers today.

To address these pain points, KITECH has developed a customized compact pipe shredding, washing, and drying system for its customers. By processing contaminated HDPE pipes through shredding, washing, and drying prior to pelletization, this system effectively removes various impurities from the feedstock, significantly enhancing the purity of the recycled pellets and ultimately improving the overall quality of the extruded products.

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Why Washing System in HDPE Pipe Recycling

Outdoor-collected HDPE pipes are often exposed to soil, mud, sand, gravel, oil, and other contaminants. Simply reducing the pipe size is not enough to prepare the material for high-quality HDPE pipe recycling.

When dirty HDPE pipes enter a pelletizing machine directly, contaminants can remain in the material and affect melt filtration, extrusion stability, and the appearance of recycled pellets.

A properly designed plastic washing system therefore plays an important role in the overall HDPE pipe recycling process.

By combining crushing, friction washing, rinsing, dewatering, and drying, the recycling line can remove different types of contamination step by step and provide cleaner material for subsequent pelletizing.

For applications where recycled pellets will be used to manufacture new pipes or other demanding products, this upstream cleaning process becomes especially important.

From Pelletizing Equipment to a Complete HDPE Pipe Recycling Solution

This Chilean has been working with KITECH for several years.

The company previously purchased a KITECH KSP100 single-stage pelletizing machine in 2023, and the machine has maintained stable operation over time.

However, as recycling operations continued to expand, the customer procured large volumes of post-consumer recycled (PCR) waste pipes from the market. These pipes typically contain high levels of sand, sediment, and other contaminants, with dimensions ranging from 20–200 mm in diameter and wall thicknesses of up to 10 mm. To effectively remove impurities and improve pellet cleanliness prior to pelletization, the customer required KITECH to deliver a cost-effective, easy-to-operate pre-treatment system.

In response, KITECH custom-engineered a complete crushing and washing line with the following process configuration: economy claw type crusher→ flotation washing tank → friction washer → dewatering machine → vertical mixing dryer.

Customized HDPE Pipe Recycling Machine

After evaluating the pipe dimensions, wall thickness, contamination level, target output, and downstream pelletizing requirements, KITECH designed the following process:

Claw type Crusher → Friction Washer → flotation washing tank→ Dewatering Machine → Vertical Mixing Dryer

Each component has a specific role in the HDPE pipe recycling process.

1:Claw type Crusher for Thick-Walled HDPE Pipes

The first stage of the plastic pipes recycling machine is the Claw type crusher.

Designed for rigid plastics and plastic pipes, the crusher can process pipes with wall thicknesses of up to approximately 10 mm.

For customer’s 10 mm HDPE pipes, KITECH optimized the blade configuration according to the material characteristics.

The optimized cutting action helps achieve:

★ Anti-slip gripping for stable, jam-free material feeding

★ Compatible with high-toughness materials for superior crushing efficiency

★ Stable equipment load ensures extended service life

★ Lower energy consumption with simplified operation and maintenance

The claw crusher handles pipes up to 2–3 m directly, significantly reducing the manual labor required for pre-cutting.

2: Washing Tank for Heavy Impurities

The flotation washing tank is a core unit in plastic recycling washing lines, integrating impurity removal, density-based sorting, and deep cleaning. In HDPE pipe recycling, for example, crushed material contains heavy contaminants such as sand, gravel, cement chunks, metal fragments, pipe sludge, and aged deposits, alongside light impurities including plastic film scraps, paper, and wood chips.

Operating on the principle of density separation in water, the system achieves precise stratified purification through buoyancy differentials: heavy impurities sink rapidly to the tank bottom and are periodically discharged by a sludge screw conveyor; light impurities float to the surface and are removed via overflow weirs and a skimming mechanism. This simultaneous dual-stream separation effectively enhances the cleanliness of recycled plastic flakes.

3: Friction Washer for Surface Contaminants

After washing, the material enters the friction washer.

Powered by high-speed blades, The friction washer creates a turbulent vortex where plastic particles collide, scrub, and polish one another at high velocity. This intense self-abrasion action strips away stubborn surface contaminants for a deeper clean.

4:Dewatering and Drying for Better Material Preparation

After washing, the HDPE material contains a certain amount of surface moisture.

The material first enters the high-efficiency dewatering machine, where centrifugal force removes most of the surface water.

It then moves into the vertical mixing dryer.

Hot air circulation combined with mechanical agitation further reduces moisture and helps prevent the washed HDPE material from sticking and clumping.

The final output is clean, dry material that can be efficiently transferred to the next stage of the HDPE pipe recycling process.

Pre-Shipment Testing of the HDPE Pipe Recycling Line

For KITECH, factory testing is not simply about checking whether a machine can start and run.

The purpose of a pre-shipment test is to verify whether the complete HDPE pipe recycling system can achieve the customer’s expected processing results.

For this project, KITECH used HDPE pipes with characteristics similar to the customer’s actual material.

The test material contained common contaminants found in outdoor-collected pipes, including:

• Soil and mud
• Sand and gravel
• Oil residue
• Surface dust
• Other loose contaminants

Before washing, the pipe surfaces were heavily covered with soil and other contaminants. After passing through the complete plastic washing system, the natural HDPE color became visible again, and the material surface was significantly cleaner.

These results confirm the main purpose of the customized HDPE pipe recycling solution: not simply to wash the material, but to create consistent https://www.kitechrecyclingmachine.com/kwph-series-hard-plastics-washing-machine.htmlmaterial for downstream processing.

A Plastic Washing System Designed for Long-Term Operation

Washing performance is only one part of an industrial HDPE pipe recycling solution.

For long-term operation, KITECH also focuses on equipment durability, energy efficiency, automation, and operating costs.

1:International-Brand Core Components

Depending on the equipment configuration, KITECH uses drive and electrical components from internationally recognized brands, including SEW, WEG, Siemens, ABB, and Schneider.

Selected core components are backed by a 24-month warranty, supporting reliable operation over the equipment’s service life.

2:Dynamic Balancing and Shaft Treatment

All equipment operating above 500 rpm undergoes dynamic balancing to improve running stability.

The main shaft receives dual quenching and tempering treatment, which improves surface strength, wear resistance, and impact resistance.

These engineering measures help reduce wear and extend the service life of key components in the HDPE pipe recycling machine.

3:Lower Operating Costs

KITECH also optimizes the consumption of water, electricity, and compressed air throughout the plastic washing system.

Under comparable operating conditions, the overall energy consumption of the line can be approximately 15% lower than comparable systems, helping customers control long-term operating costs.

For industrial HDPE pipe recycling, reducing operating costs is just as important as achieving good washing performance.

4:Automated Process Control

The complete recycling line integrates automated feeding, crushing, impurity removal, washing, dewatering, and drying.

An intelligent control system monitors production status and key equipment parameters in real time.

This reduces manual intervention while helping operators manage the HDPE pipe recycling process more efficiently.

The integrated process design also helps reduce the risk of material blockages and machine jams, supporting stable continuous production.

Why Customer Chose KITECH Again

The relationship between this chilean customer and KITECH started with pelletizing equipment.

After several years of stable operation with the KSP100 pelletizer, the customer returned to KITECH when a new challenge emerged in its HDPE pipe recycling process.

This time, the problem was not the pelletizer.

It was the quality of the material entering the pelletizer.

KITECH therefore focused on solving the actual process problem instead of simply recommending additional equipment.

The final plastic pipes recycling machine was developed according to the customer’s:

• Pipe diameter
• Wall thickness
• Material contamination
• Required washing performance
• Downstream pelletizing requirements
• Production needs
• Investment budget

This approach reflects KITECH’s engineering philosophy:

The goal is not to install more machines. The goal is to make every stage of the recycling process solve a real production problem.

KITECH’s Complete Plastic Pipe Recycling Expertise

KITECH specializes in the engineering application of plastic recycling and regeneration technologies.

Our solutions cover multiple stages of the recycling process:

Pre-treatment → shredding→Crushing → Washing → Separation → Dewatering → Drying → Pelletizing

For different materials and contamination levels, KITECH can develop customized systems for HDPE pipe recycling, PP pipe recycling, PVC pipe recycling, PE film recycling, and other plastic waste applications.

A complete plastic pipes recycling machine can integrate different processing stages according to the customer’s actual requirements rather than relying on a standard configuration.

This engineering-based approach helps customers achieve better material quality while maintaining stable production and reasonable operating costs.

With extensive international project experience, KITECH provides support from process design and equipment selection to factory testing and delivery.

Looking for an HDPE Pipe Recycling Solution?

If your HDPE pipe recycling operation is facing similar challenges, KITECH can help.

Common problems include:

• Dirty HDPE pipes causing high impurity levels after pelletizing
• Black specks or contamination in recycled products
• High labor costs from manual pipe cutting
• Friction washing alone not achieving the required cleanliness
• Uncertainty about the right plastic washing system
• Difficulty selecting the appropriate plastic pipes recycling machine
• Concerns about washing performance and downstream pelletizing quality

To recommend a suitable HDPE pipe recycling solution, KITECH only needs basic information about your material:

Material type | Pipe diameter | Wall thickness | Contamination level | Target capacity

Based on these parameters, KITECH can design a customized HDPE pipe recycling process and recommend the appropriate crushing, washing, drying, and pelletizing equipment.

An effective recycling system is not about adding more equipment. It is about ensuring that every stage adds value to the material and contributes to better quality, higher efficiency, and more profitable HDPE pipe recycling.