Huashida's independently developed PUR Spray & PE Wrapping Insulated Steel Pipe Production Line (suitable for 508-1620 mm steel pipes) integrates three core sections: an external pipe shot blasting and rust removal line, a polyurethane spray foaming line, and a PE wrap winding line.

This advanced production system is supported by multiple national utility patents and has received a Level 5 technology rating from a third-party evaluation, meeting domestic leading industry standards. It has also been recognized as a "First Set of Technical Equipment" in Shandong Province.

The line adopts a continuous PUR spraying process and is fully automated, delivering high production efficiency, reduced raw material consumption, and optimized energy savings. It ensures excellent polyurethane foaming quality, a high closed-cell rate, low water absorption, and a stable three-in-one (trinity) molded structure.

The resulting insulated pipes are eco-friendly and low-carbon, offering stable performance along with outstanding economic and social benefits.

The spraying and winding production process ensures the uniformity of the density of the insulation layer, significantly improving product quality and reducing production costs.

The PUF spray PE winding pre-insulated pipe production line mainly consists of the following parts:

• Steel Pipe Outer Wall Shot Blasting Line: Cleans the outer wall of the steel pipe, removing impurities and rust to provide a good surface condition for subsequent spraying.
• Polyurethane Spray Molding Line: Precisely controls the amount and uniformity of polyurethane spraying to form a high-quality insulation layer.
• Polyethylene Sheet Extruding Winding Line: Extrudes and winds the polyethylene material onto the insulation layer to form a sturdy outer casing.
• Water Cooling Line: Cools the formed pipe to ensure stable product dimensions.
• End-Cutting Equipment: Precisely cuts the two ends of the pipe to meet installation requirements.

Qingdao Huashida Machinery Co., Ltd was established in 2003. Since its inception, Huashida has focused on plastic polyurethane insulation pipe production line, 3PE anti-corrosion pipe production line, large diameter underground pipe production line and plastic pipe joints for 20 years. We always attach great importance to research and development, collaborating closely with Beijing University of chemical technology, Qingdao university of technology and scientific research institutions. By absorbing advanced technology home and abroad, after 20 years of endeavor we now rank one of the top 3 manufacturers in the industry in China. Huashida machines have been well received in Saudi Arabia, Kazakhstan, Uzbekistan, United Arab Emirates, Turkey, Russia, etc.

• Supply full completed production solution: design, installation, commissioning, and training
• Share you 389 sets of production experience from all the world
• Having 9 professional senior engineers
• Having a high-end plastic machinery equipment expert workstation in China

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

Our main products are:

• 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
• 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.

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