PVC Dual Pipe/Four Pipe Extrusion Line

JWELL's JWG series PVC twin-pipe and four-pipe extrusion lines are designed for efficient, continuous production of UPVC round pipes, covering a diameter range of Φ16 mm to Φ200 mm. The series includes three twin-pipe models (JWG-PVC63, JWG-PVC110, JWG-PVC200) and two four-pipe models (JWG-PVC32, JWG-PVC32-H). All models use high-torque SJ series extruders, with main motor power ranging from 37 kW to 110 kW, and stable hourly output between 250–800 kg.

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Application

These extrusion lines are designed to manufacture unplasticized PVC (UPVC) pipes for the following applications:
Electrical conduit – Φ16–32 mm pipes for residential and commercial wiring.
Drainage and water supply pipes – Φ50–200 mm pipes for sewage, vent, and ventilation systems.
Telecommunication ducts – lightweight, corrosion-resistant conduits.
Irrigation – medium-diameter pipes for agricultural water supply.
Real case: A pipe manufacturer in Southeast Asia upgraded from a single line to our JWG-PVC110 twin-pipe model. They now produce Φ75 mm water supply pipes at 450 kg/h, doubling daily output in the same workshop area.

Advantages

Feature	Advantage
Twin-pipe (Φ16–200 mm) and four-pipe (Φ16–32 mm) options	One line covers a wide diameter range. For small-diameter pipes (Φ16–32), the four-pipe configuration produces 4 times the hourly length of a single-pipe line with the same 37 kW motor.
High-torque extruder (SJ265/132, SJ280/156, SJ292/188)	Larger screw diameter (up to 292 mm) and L/D ratio ensure perfect plasticization and mixing. The SJ292/188 on JWG-PVC200 delivers 110 kW – enough to push 800 kg/h of melt, even with highly filled PVC formulations.
Energy-efficient main motor	37 kW for medium lines, 55 kW for large twin-pipe lines, 110 kW for high-output models. Actual energy consumption per kg is 1520% lower than comparable machines due to optimized screw geometry.
Stable output range	Output guaranteed within ±5% (e.g., 250–300 kg/h on JWG-PVC63). No sudden drops – suitable for continuous 24/7 production.
Fast mold change	Φ50–200 mm twin-pipe dies can be changed within 20 minutes. Φ16–32 mm four-pipe dies use interchangeable inserts, reducing downtime.

Real case: A European pipe extruder replaced two old lines with one JWG-PVC200 twin-pipe (110 kW, 700–800 kg/h). They reduced energy costs by 35% and labor costs by 50% – one operator now achieves the output that previously required three people.

Process

Each JWG line undergoes rigorous in-house and on-site testing, conforming to ISO 9001 and CE standards.
A. In-process quality control (during extrusion)

Parameter	Test method	Acceptance standard
Pipe outer diameter	Laser gauge (online)	Φ16–63: ±0.2 mm; Φ50–200: ±0.5 mm
Wall thickness	Ultrasonic scanner	±0.1 mm (conforms to EN 1329 / ASTM D1785)
Ovality	Rotating caliper	≤ 1.5% of nominal diameter
Surface finish	Visual inspection (2x magnification)	No bubbles, burn marks, or unmelted particles

B. Raw material & compound testing|
PVC dry blend – K value 65–68, bulk density 0.55–0.60 g/ml, moisture <0.2%.
Calcium carbonate filler – particle size ≤10 µm, whiteness ≥90%.
Stabilizers & lubricants – dispersion uniformity checked before production.

C. Final product testing (random sampling every 4 hours)
Hydrostatic pressure test (20°C, 1 hour): Φ16–63 pipes ≥25 MPa; Φ50–200 pipes ≥16 MPa.
Drop weight impact test (0°C, 2 kg weight, drop height 1 m): no cracks after 10 impacts.
Vicat softening temperature ≥78°C (for hot water conduit applications).
Real case: A client in the Middle East needed pipes for underground telecom ducts. Using our JWG-PVC110 line, we performed a 24-hour continuous run test at 380 kg/h. All pipes passed compression testing (10 kN for 1 minute) with zero deformation. The line was shipped with a detailed QC report signed by a third-party inspector.

Parameters

Type	Pipe spec (mm)	Extruder	Main Power (kW)	Output (kg/h)
JWG-PVC63 (Two strand)	Φ16 ~ 63	SJZ65/132	37	250 ~ 300
JWG-PVC110 (Two strand)	Φ50 ~ 110	SJZ80/156	55	350 ~ 450
JWG-PVC200 (Two strand)	Φ50 ~ 200	SJZ92/188	110	700 ~ 800
JWG-PVC32 (Four strand)	Φ16 - 32	SJZ65/132	37	250 ~ 300
JWG-PVC32-H (Four strand)	Φ16 - 32	SJZ65/132	37	250 ~ 300

Q1: Can the same line produce both solid-wall and foamed PVC pipes?
A: Yes – simply change the screw (standard screw for solid-wall; optional barrier screw for foam). The extruder's torque and cooling capacity (SJ series) are designed for both. For foam pipes, output decreases by about 15% to ensure uniform cell structure.

Q2: How do you clean a twin-pipe die when switching from dark to light color pipes?
A: Use our purging compound (PVC-based) at 160–180°C. Run the extruder at 20 rpm for 5–10 minutes until the melt turns white. Then only disassemble the die lips – no need to remove the entire die. Typical cleaning time: 15 minutes.

Q3: What are the power supply requirements for installation?
A:
JWG-PVC63 / 32 / 32-H: main motor 37 kW + auxiliaries (vacuum tank, puller, cutter) 15 kW → total approx. 52 kW, 380V/50Hz (60Hz optional).
JWG-PVC110: 55 kW + 25 kW → 80 kW.
JWG-PVC200: 110 kW + 40 kW → 150 kW.
We provide detailed electrical layout drawings and equip motors with soft starters to avoid inrush current.

Q4: How do you guarantee 700–800 kg/h output on JWG-PVC200?
A: The guarantee is based on a standard UPVC formulation (100 kg PVC, 5 kg CPE, 3 kg stabilizer, 20 kg CaCO₃, 1.2 kg lubricant). Screw speed 45 rpm, melt temperature 185±5°C. We test each line in our factory with your formulation (or a similar one) and provide a video record of the run.

Q5: What spare parts should I stock?
A: Recommended spare parts kit:
2 heater bands (per zone)
1 spare screw tip + non-return ring
1 set of die inserts (for your most common pipe sizes)
5 cutting blades (for automatic cutter)
3 puller belts
We can also supply a full spare parts kit at 5% of the line cost.

Q6: Can the four-pipe line (JWG-PVC32-H) run continuously at 300 kg/h?
A: Yes – the H version features reinforced barrel cooling (two fans per zone) and a grooved feed section. At 300 kg/h, melt temperature stays below 190°C. We recommend a cooling tank length of at least 6 m for four pipes to avoid deformation.

Q7: Do you provide remote troubleshooting?
A: Absolutely. All lines come with a PLC control panel (Siemens or Delta) and a remote access module. Our engineers can log in via TeamViewer to adjust parameters, diagnose alarms, or update recipes – typically within 2 hours of your request (24/7 support).