PLC-Controlled PUR Foam Spray PE Spiral Wrapping Production Line for Large-Diameter Pre-Insulated Steel Pipes with Three-Layer Trinity Composite Structure

Our professional PUR spray HDPE wrapping steel pipe thermal insulation production line is independently engineered by Huashida for manufacturing large-diameter pre-insulated steel pipes ranging from 508mm to 1620mm. This all-in-one polyurethane foam insulation pipe machine combines three core functional modules: steel pipe external shot blasting derusting unit, continuous polyurethane spray foaming system and HDPE strip wrapping production section for complete buried district heating pipe fabrication.

As premium patented Thermal insulation pipe manufacturing equipment, the whole set owns multiple national utility patents, third-party Level 5 technology certification and Shandong Provincial First Set of Technical Equipment accreditation, complying with top domestic industrial standards for large diameter pre-insulated pipeline production.

Adopting continuous automatic PUR spray technology, this fully PLC-controlled pre-insulated steel pipe production line boosts overall output while cutting raw material and power wastage. It forms stable three-layer trinity composite structure (steel pipe + PU foam insulation + HDPE outer jacket) with high closed-cell foam rate and low water absorption. Finished eco-friendly low-carbon polyurethane insulated steel pipes hold consistent insulation performance for underground heating pipeline projects.

• Steel pipe surface shot blasting & full derusting
• Medium-frequency induction preheating for uniform PU bonding
• Precise automatic polyurethane spray foaming
• HDPE strip wrapping around solid PU insulation layer
• Finished insulated pipe end trimming

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 more than 20 years of production experience.

We are always attaching great importance to research and development, collaborating closely with Tsinghua University, Beijing University of Chemical Technology, South China University of Technology and scientific research institutions. By absorbing advanced technology home and abroad, we now rank one of the top 3 manufacturers in the industry in China.

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

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