Large Diameter HDPE Casing Pipe Extrusion Line for PUF Pre-Insulated Pipelines

The PE series pre-insulated pipe extrusion line, designed by Qingdao Huashida Machinery Co., Ltd. with advanced German extrusion technology, features an integrated system for extrusion, vacuum calibration, cooling, pulling, cutting, and stacking. It delivers high automation, large extrusion capacity, stable performance, and long service life.

Compared with internal pressure calibration methods, the vacuum calibration method offers superior pipe stiffness, pressure resistance, and surface smoothness, making it the most advanced and popular technology in the world.

This production line is specially designed for manufacturing the outer HDPE casing pipes used in PUF (polyurethane foam) pre-insulated pipelines, widely applied in energy-saving heating networks and trenchless pipeline laying.

Working pressure: up to 1.6 MPa

Water temperature: up to 130 °C (403 K)

Short-term temperature peak: 150 °C (423 K)

• Inner carrier pipe: Steel or galvanized steel
• Middle layer: Polyurethane foam thermal insulation
• Outer jacket pipe: High-density polyethylene (HDPE) for underground installation or galvanized steel sheet for above-ground installation

• Higher reliability of heating pipeline systems
• Remote condition monitoring capability for early leak detection
• Accident prevention by timely maintenance
• Long service life with excellent mechanical strength and corrosion resistance

Qingdao Huashida Machinery Co., LTD is a manufacturer of series of plastic pipe machines, municipal pipe machines, pipe insulation & anticorrosion machines, and pipe jointing & anticorrosion materials, with 21 years of production experience.

1. HDPE jacket pipe for pre-insulated pipe Production Line (110-2000mm)
2. Rigid pre-insulated pipe Production Line
3. Flexible pre-insulated pipe (PERT) production line
4. Steel pipe FBE/2LPE/3LPE anti-corrosion coating line
5. Steel pipe derusting line
6. PE pressure pipe/Water Gas supply pipe production line
7. PP/PE plastic board/sheet/geomembrane production line
8. NBR PVC Thermal insulation tube/plate production line
9. Pipeline anti-corrosion materials and instruments: heat shrink joint coating sleeve, electro-fusion weldable joint sleeve, portable welding gun (extruder), PE PP welding rod

We have been working with more than 400 overseas customers and exporting our products to Kazakhstan, Uzbekistan, Iran, Turkey, Russia, Nigeria and other countries.