Rising Demand for Efficient PVC Pipe Production in Burundi’s Building Sector

In recent years, Burundi’s construction and small-scale infrastructure development has gradually increased the demand for stable and efficient PVC pipe production systems.

Local manufacturers supplying building water supply pipelines, drainage systems, and electrical conduit applications are focusing more on production solutions that can improve output consistency while maintaining dimensional stability during continuous operation.

Against this background, a regional pipe producer introduced a PVC Double Pipe Extrusion Line, with technical support provided by LANGBO Machinery, to enhance its continuous production capability for twin PVC pipes used in building and utility applications.

The system is mainly applied in:

• Residential water supply piping systems

• Building drainage networks

• Electrical conduit installations

• Light infrastructure pipeline projects

This project aims to improve production efficiency while maintaining stable pipe quality under long-cycle operation conditions.

What Is a PVC Double Pipe Extrusion Line?

A PVC Double Pipe Extrusion Line is a continuous extrusion system designed to produce two PVC pipes simultaneously using a shared extrusion platform with a dual-channel die structure.

Compared with single-line production, this system allows manufacturers to increase output within the same production space while maintaining controlled pipe quality.

It is widely used in building and utility pipe manufacturing, particularly for medium and small diameter PVC pipe production.

Production Stability Challenges in Twin Pipe Extrusion

In dual-pipe production systems, stability depends on precise coordination between two parallel extrusion channels.

Manufacturers typically focus on:

• Balanced melt distribution across both channels

• Consistent pipe diameter and wall thickness

• Synchronized haul-off speed control

• Stable vacuum calibration performance

• Uniform cooling during continuous production

Any deviation between the two outputs can affect installation compatibility in building pipeline systems.

Equipment Configuration Overview

PVC Plasticization System

A conical twin screw extruder is applied to ensure stable PVC melting and homogenization.

It provides:

• Continuous material processing

• Stable melt pressure output

• Reduced fluctuation during long production cycles

Dual Pipe Die Head System

The die head is designed with two independent flow channels to ensure balanced extrusion.

Its main function is to:

• Maintain uniform melt distribution

• Ensure consistent pipe geometry on both outputs

• Reduce pressure imbalance during operation

Vacuum Calibration and Cooling Section

After forming, both pipes pass through a vacuum calibration and cooling system.

This section helps:

• Stabilize pipe outer diameter

• Control shrinkage during cooling

• Reduce deformation in continuous production

Haul-Off and Cutting System

The dual haul-off system operates under synchronized speed control to maintain balanced pipe movement.

The cutting unit ensures:

• Stable fixed-length cutting

• Continuous production operation

• Consistent finished pipe quality

Application Areas in Burundi

The PVC double pipes produced by this system are widely used in:

• Residential construction projects

• Small municipal drainage systems

• Electrical conduit installations

• Building utility pipeline networks

• Low-pressure fluid transport systems

These applications require stable pipe geometry to ensure reliable installation performance in construction environments.

Production Performance and Integration

After commissioning, the manufacturer reported improved stability during continuous operation.

According to the production team, supported by LANGBO Machinery technical guidance, the system achieved:

• More stable output across dual pipe channels

• Improved synchronization between extrusion and haul-off systems

• Reduced fluctuation during long production cycles

• Better consistency for building pipeline applications

• Smoother integration into existing production workflow

The system is now part of the customer’s continuous PVC pipe manufacturing line for construction-related applications.

Engineering Conclusion

This project in Burundi demonstrates how a PVC Double Pipe Extrusion Line supported by LANGBO Machinery can enhance production efficiency in building and utility pipe manufacturing.

Through coordinated plasticization, dual-channel die design, synchronized control systems, and stable cooling calibration, the production line ensures continuous and balanced twin-pipe output.

It provides a practical solution for manufacturers aiming to improve productivity while maintaining stable pipe quality in construction pipeline applications.