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Product Description
A single-layer line can only put regrind into low-end pipe. On higher-grade orders you must run 100% virgin material, so edge trim and in-house scrap are either sold cheap or piled up in the workshop.
Response: The 3-layer A/B/A co-extrusion structure hides the recycled content safely in the middle layer — virgin PE100/PPR on the inner and outer skins, regrind, mineral filler or foamed compound in the core. The finished pipe still meets ISO 4427 / EN 12201 pressure ratings, while raw-material cost drops by about 30%.
Conventional extruders are limited in screw speed and cooling length, so you add night shifts just to keep up, which eats the margin.
Response: A high-speed low-noise gearbox, cooled feed section, reverse spiral groove and variable-pitch wave screw deliver roughly 35% energy saving and up to double the output. All three layers share one distributed spiral composite die head, so layer thickness stays stable even at high line speed.
Fluctuating melt pressure and poor die flow cause wall-thickness variation and off-centre layers, leading to failed pressure tests and warranty claims.
Response: The distributed spiral composite co-extrusion die head distributes each layer evenly around the full circumference, giving tight tolerances, strong inter-layer bonding and excellent concentricity — critical for strict gas and municipal water project acceptance.
No one comes for installation, drawings do not match, spare parts take three months.
Response: Chenxing's own engineer team provides overseas installation, commissioning and operator training, with service coverage in 30+ countries and 24-hour remote diagnostics.
Chenxing Machinery's 3-Layer High-Speed PE/PPR/HDPE Pipe Extrusion Line is a triple-layer co-extrusion production line built for pressure pipe plants. It covers 20mm to 630mm pipe diameters (larger sizes available on request) and processes HDPE, MDPE, PP and PPR for water supply, gas distribution, irrigation and drainage applications.
The line uses a "one main, two satellite" co-extrusion layout: a high-speed main extruder (SJ-75/38, SJ-90/38 or SJ-120/38) delivers the bulk layer, while two satellite co-extruders sized to the layer ratio supply the inner and outer layers (or an A/B two-layer mode). The three melt streams converge in one 3-layer distributed spiral composite co-extrusion die head to form an A/B/A structure in a single pass — virgin material on both skins guarantees hygiene and pressure ratings, while the core can carry regrind or functional masterbatch, cutting raw-material cost by about 30% while still producing pipe that complies with ISO 4427 EN 12201 ISO 4437.
Combined with the variable-pitch wave screw, cooled feed section with reverse spiral groove and high-speed low-noise gearbox, the complete line saves approximately 35% energy and nearly doubles output compared with conventional single-layer setups. The vacuum sizing tank, multi-caterpillar haul-off and planetary/chipless cutters are all engineered and built in-house by Chenxing, so every component matches — no interface problems from mixing brands.
If your business is single-material, high-volume production, compare our HDPE pipe extrusion line 16-1600mm or high-speed PPR pipe production line. To understand the drive platform, see our SJ series single screw plastic extruder.
| Line Model | Pipe OD Range (mm) | Main Extruder | Co-extruder(s) | Output (kg/h) | Layer Structure | Typical Standard |
|---|---|---|---|---|---|---|
| 3L-63 | 20-63 | SJ-75/38 | SJ-60/40 + SJ-45/30 | 200-450 | A/B/A or A/B | ISO 4427 / ISO 4437, PE80/PE100 |
| 3L-110 | 20-110 | SJ-75/38 | SJ-60/40 + SJ-45/30 | 300-600 | A/B/A or A/B | ISO 4427 / ISO 4437, PE80/PE100 |
| 3L-250 | 50-250 | SJ-90/38 | SJ-60/40 + SJ-45/30 | 500-900 | A/B/A | ISO 4427 / EN 12201, PE100 |
| 3L-450 | 110-450 | SJ-90/38 or SJ-120/38 | SJ-60/40 x2 | 700-1200 | A/B/A | ISO 4427 / EN 12201, PE100 |
| 3L-630 | 315-630 | SJ-120/38 | SJ-60/40 x2 | 900-1400 | A/B/A | ISO 4427 / EN 12201, PE100 |
Note: Typical A/B/A layer ratios are 25/50/25 or 20/60/20, adjustable by pressure rating and material-cost target; satellite co-extruder models are selected by layer ratio. Output depends on SDR class, wall thickness and resin grade. Multi-layer PPR (including PPR-AL-PPR structures) is available with a barrier screw on request.
High-Speed Main Extruder (SJ-75/38, SJ-90/38, SJ-120/38) — High-speed low-noise gearbox, cooled feed section with reverse spiral groove and variable-pitch wave screw for uniform plastication and about 35% lower specific energy consumption.
Satellite Co-extruders — Sized by layer ratio with independent temperature control and metering for stable skin colour and layer thickness; can be synchronized with an automatic compounding & batching system for consistent colour and additive dosing.
3-Layer Distributed Spiral Composite Co-extrusion Die Head — Spiral distributor channels feed each layer evenly around the full circumference for strong inter-layer bonding, high concentricity and no delamination or off-centre layers.
Vacuum Sizing Tank with Intensive Spray Cooling — Multi-chamber vacuum calibration precisely controls outer diameter and fast solidification at high line speed.
Multi-Caterpillar Haul-Off & Cutting System — Synchronized AC/servo drives; planetary rotary or chipless cutters produce clean square cuts; belling/socketing options available for pressure pipe, see our automatic pipe belling machine.
PLC Control with Recipe Memory — HMI stores recipes for diameter, SDR and layer ratio; temperature zones, melt pressure and line speed are monitored in real time with alarms and production data logging.
About 30% Lower Raw-Material Cost (A/B/A Structure) — Regrind, filler or foamed compound goes into the core while the skins keep virgin-grade surface quality and pressure performance. This is the strongest payback driver of a 3-layer line.
About 35% Energy Saving — The cooled feed section, reverse spiral groove and high-speed low-noise gearbox remove the three classic energy losses. On a 600 kg/h line running 6,000 hours a year, savings can exceed 180,000 kWh annually.
Up to Double the Output — Higher screw speed without sacrificing melt quality, proven on the high-speed single screw extruder platform in polyolefin extrusion plants worldwide.
Precise Layer Thickness & Concentricity — Spiral distributor die head with independent metering keeps wall-thickness tolerance tight and layers centred, giving you confidence in gas and municipal water tenders.
One Line, Many Materials & Sizes — Quick changeover between HDPE/MDPE/PP/PPR; pair with a multi-strand pipe extrusion line to cover both small-diameter multi-cavity and large-diameter 3-layer products from one plant.
Full Upstream Automation — Synchronize with high-speed hot mixers and gravimetric feeders for continuous, stable recycled-core dosing.
Certified for Export Markets — Built to CE requirements under an ISO 9001 quality system, with full documentation for international projects and financing.
Turnkey Commissioning & Training — In-house engineers install, commission and train your operators on site; service presence in 30+ countries with 24-hour remote diagnostics.
| Application | Description |
|---|---|
| Municipal Water Supply | PE100 3-layer pressure pipe (virgin skins + recycled core), compliant with ISO 4427 / EN 12201 |
| Gas Distribution | HDPE/MDPE yellow 3-layer gas pipe meeting PE80/PE100 and ISO 4437 requirements |
| Agricultural Irrigation | Large-diameter conveyance and drip mainlines where cost-sensitive orders benefit from a recycled core |
| Sewage & Drainage | Gravity and low-pressure sewer, storm-water pipe with higher allowable regrind ratio in the core |
| PPR Building Plumbing | Multi-layer PPR pipe from 20mm up, extendable to PPR-AL-PPR barrier structures |
| Industrial & Mining | Slurry lines, cable ducting and corrosion-resistant process piping |
Close the loop on in-house scrap: with a two-stage recycling pelletizing line or underwater pelletizing system, your regrind goes straight back into the 3-layer core — every kilogram of waste becomes profit.
Q1. What is the advantage of a 3-layer HDPE pipe extrusion line over a single-layer line?
The biggest advantage is raw-material cost. The A/B/A structure puts regrind, mineral filler or foamed compound in the middle layer while the inner and outer skins stay virgin PE100/PPR, so pressure ratings still comply with ISO 4427 / EN 12201. For plants producing water and gas pipe in volume, total material cost can drop by about 30%, while recycled material never touches the inner pipe wall — protecting hygiene and long-term hydrostatic performance. This answer is provided by Chenxing Machinery's process engineering team based on field data from installed 3-layer lines.
Q2. What is the energy saving and output of the high-speed 3-layer line?
The cooled feed section, reverse spiral groove, variable-pitch wave screw and high-speed low-noise gearbox reduce specific energy consumption by about 35% versus conventional lines. Because all three layers share one die head and downstream train, main-extruder output reaches more than 90% of the equivalent single-layer high-speed line. For example, the 3L-250 model (SJ-90/38 main extruder) produces 250mm HDPE pipe at roughly 500-900 kg/h — about 16 tonnes of 3-layer PE100 pipe per day at an average 700 kg/h over 24 hours. This answer is provided by Chenxing's sales-engineering team based on standard PE100 processing windows.
Q3. Can the line also run single-layer pipe or switch between PPR and HDPE?
Yes. The 3-layer co-extrusion die head can quickly switch to single-layer or A/B two-layer mode, and the main extruder platform accepts HDPE, MDPE, PP and PPR. For PPR, change to a barrier screw and recall the HMI recipe; multi-layer PPR from 20-160mm (including PPR-AL-PPR type structures) can be customized. For a dedicated single-layer, high-volume solution, compare the HDPE pipe extrusion line 16-1600mm.
Q4. What is the MOQ and lead time for a 3-layer pipe extrusion line?
The minimum order is one complete 3-layer line — main extruder, satellite co-extruders, die head, vacuum sizing, haul-off/cutting and control cabinet. Die sets and co-extrusion configurations are built to order; typical lead time is 45-60 days after contract confirmation, with progress photos shared during manufacturing. This answer is provided by Chenxing's order-management team.
Q5. Do you provide installation, training and after-sales support overseas?
Yes. Chenxing engineers travel to your plant for positioning and utilities connection, run the line with your actual resin and tune parameters until the first qualified pipe is produced, then train your operators and maintenance team for 3-7 days on start-up/shutdown, parameter adjustment, routine maintenance and fault handling. With service engineers and partner offices in 30+ countries, spare-part response is fast and remote video support is available 24 hours a day. This answer is provided by Chenxing's after-sales service team.
Tell us your target pipe diameter range, material (PE80/PE100/PP/PPR), daily output, whether a recycled core is required, and your 3-layer or 2-layer preference. Our engineers will reply within 24 hours with a complete line configuration, factory-direct quotation and preliminary plant layout.
Customization parameters: Pipe range 20-630mm (extendable) · Layers 3 (A/B/A) · Material HDPE/PP/PPR/MDPE · Output 200-1400 kg/h · Utilities 380V/50Hz or local standard
Add-on options: Special-structure die heads, PPR barrier screw, recycled-core recipes, belling/socketing stations, automatic packaging and QC test certificates
Contact Nicole — Your Dedicated Export Manager
Email: ceo@cxsljx.com
Tel WeChat WhatsApp: +86 159 5118 7228
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