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.

Founded in 2003, Qingdao Huashida Machinery boasts over 20 years' experience developing polyurethane spray HDPE wrapping insulation pipe production line, pre-insulated pipe making machine, 3PE anti-corrosion pipe equipment and large diameter underground pipeline machinery.

We cooperate long-term with renowned domestic universities for technical upgrade, adopting international production norms to rank among China's top three pipeline equipment manufacturers. Our reliable steel pipe insulation machinery and 3LPE coating lines have been exported to Russia, Turkey, UAE, Saudi Arabia, Kazakhstan, Uzbekistan and over 60 global territories, widely used for district heating underground pipeline construction.