Underground Steel Pipe PU Pre-Insulation HDPE Jacket Pipe Extrusion Equipment
The HDPE Jacket Pipe Extrusion Line is a high-output, energy-efficient production system designed for manufacturing thin-wall HDPE outer casing pipes used for PU foam pre-insulated pipelines that comply with international standards.
The finished jacket pipe consists of a steel pipe, a PU polyurethane insulation layer, and a durable protective HDPE outer shell. Pipe Diameter Range: 110-2200mm
Main Advantages:
Utilizes a vacuum calibrating technique.
Ensures smooth internal and external walls.
Offers a long service life with excellent anti-corrosion properties.
High-efficiency extruder gives larger output, stable performance.
Typical Output Capacity:
SJ-75/33: 250-350 kg/h
SJ-120/33: 700-900 kg/h
SJ-150/33: 800-1200 kg/h
Pipe Usage:
HDPE jacket pipe is out case of thermal insulating pipe, which is widely used in central heating, oil, nature gas and other industrial area.



High-efficiency single screw extruder
The screw is with barrier & mixing head; the barrel is a new model with slotting (channel). Both guarantee the good jellification, large output and stable performance of the extruder.

Die-Head
Die-head is mainly composed of mandril, neck mold, spiral body, cover, die-head body, bolts, and heating rings.

Vacuum Calibration Tank
The vacuum calibration tank is mainly composed of a frame, stainless steel tank, vacuum system, spray cooling system, position adjustment device. Spray nozzles spray cooling water from all directions on pipe surface to cool down the pipe promptly.
Haul-off Machine
The haul-off machine is mainly composed of a driving device, track, clamping structure, adjusting system, side plate and foundation bed. Haul-off caterpillars are driven by AC motor with frequency conversion control to adapt to different extrusion speeds.
Chipless cutting
It adopts the blade punching principle to realize no-dust cutting.

Control system
ABB frequency converter or EUROTHERM speed controller
Japan RKC temperature controller
SIEMENS AC contactors
A controlling system can be designed according to customers' requirements. 






