Huashida Rigid polyurethane spraying polyethylene winding prefabricated directly buried insulation pipe consists of steel working pipe, spraying polyurethane rigid foam insulation layer and winding polyethylene outer protective pipe.
The line adopts continuous spraying production process.It features a high degree of automation, fast production efficiency, raw material saving, increased foaming and closed-cell rate, reduced water absorption rate, and three-in-one molding, making its performance more reliable. Low-carbon and environmentally friendly products have high economic and social benefits.
The production line is composed of three major parts:
Steel Pipe Shot Blasting Machine
Polyurethane Spraying Production Line
PE Outer Jacket Winding Production Line
Production steps:
1.External shot blasting for steel pipe rust removal
2.Steel pipe transferred to spraying conveyor line via pipe transport cart
3.Pipe preheating
4.Polyurethane foam spraying
5.Pipe transported to storage platform by lifting cart
6.PE jacket winding
7.Water cooling
8.Connection cutting
9.Finished pipe inspection
10.Pipe end repairing
11.Spray coding and packaging
Production line parameter:
1.Steel pipe range: 206mm-1820mm
2.Processing capacity:≤250m2/h
3. Cleaning class: Sa2.5
4.Used material: ISO (isocyanate), POLY (premixed polyether polyols), PE
5.Main equipment: Shot blasting and rust removal production line, Polyurethane spray production line, PE winding production line.
| Steel Pipe Diameter (mm) | Insulation Thickness (mm) | Outer Jacket Diameter (mm) | Minimum Outer Jacket Wall 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 |
1. Awarded the first (set) technical equipment in Shandong Province
2. Evaluation Report on Standardization of Scientific and Technological Achievements in Qingdao City
3.Having multiple national patents
4.Intelligence, automation, and reducing manual labor
5.Efficient and energy-saving, with low production costs
6.Stable and reliable, with a high yield of finished products and minimal waste
