Qingdao Huashida independently develops and manufactures the Polyurethane Spray-Winding Pre-Insulated Steel Pipe Production Line, which has been awarded the First (Set) Technical Equipment of Shandong Province.
The production line integrates steel pipe shot blasting, polyurethane foam spraying, and PE protective layer winding. It features high automation, high production efficiency, low material consumption, and stable product quality.
The complete production line consists of three main systems:
| Steel Pipe Diameter (mm) | Insulation Thickness (mm) | Outer Pipe Diameter (mm) | Minimum Outer Layer Thickness (mm) |
|---|---|---|---|
| 500 | 30–60 | 580–640 | 5.6 |
| 630 | 30–60 | 710–772 | 6.6 |
| 710 | 30–60 | 790–850 | 7.2 |
| 800 | 30–60 | 885–950 | 7.9 |
| 900 | 30–60 | 980–1054 | 8.7 |
| 1000 | 30–60 | 1090–1155 | 9.4 |
| 1100 | 30–60 | 1190–1250 | 10.2 |
| 1200 | 40–100 | 1316–1436 | 11 |
| 1400 | 50–100 | 1538–1638 | 12.5 |
| 1500 | 50–100 | 1638–1738 | 12.5 |
For underground hot water transmission and central heating systems in residential areas, commercial buildings, and industrial parks.
For thermal insulation and transportation of chilled water in commercial, industrial, and municipal cooling networks.
For maintaining fluid temperature and reducing heat loss during long-distance crude oil transportation.
For transporting hot and cold media in municipal infrastructure, power plants, chemical facilities, and other industrial projects.
Suitable for direct-buried, trench, and overhead pipeline installation, depending on project design and operating conditions.
Intelligent shot blasting, variable-frequency control, automatic abrasive cleaning, and three-stage dust removal.
Heavy-duty spiral conveying system ensures stable transportation and continuous production of large-diameter insulated pipes.
Automatic pipe loading, conveying, positioning, processing, and unloading reduce manual labor.
Continuous spraying ensures uniform foam thickness, reduces material waste, and improves insulation quality.
Energy-saving extrusion and mechanical winding ensure a uniform, compact, and reliable outer protective layer.
Integrated cutting and end-processing equipment ensures accurate dimensions and consistent finished pipe quality.
Qingdao Huashida Machinery Co., Ltd. specializes in plastic extrusion machinery, pipe insulation equipment, and pipeline anti-corrosion production systems.
With more than 20 years of manufacturing experience, we provide complete production solutions, installation, commissioning, and technical support for customers worldwide.
Huashida — Professional Pipeline Equipment Manufacturer and Solution Provider.
Client project case
Container delivery