The three-layer polyethylene (3LPE) coating process consists of:
This three-layer structure provides excellent corrosion protection for steel pipes and can extend pipeline service life from 5–10 years to 50–100 years.
It is widely used in:
The 3LPE coating features:
The production line is widely used for steel pipe external anti-corrosion coating in:
1. Oil pipelines
2. Natural gas pipelines
3. Water supply pipelines
4. District heating pipelines
5. Chemical and industrial pipelines
6. Underground buried pipelines
| No. | Description | Qty. | Remarks |
|---|---|---|---|
| 1 | Transmission line | 1 set | |
| 2 | Shot blasting derusting line | 1 set | |
| 3 | Cyclone dust collector | 1 set | |
| 4 | Pulse filter cartridge dust collector | 1 set | |
| 5 | Centrifugal blower | 1 set | |
| 6 | Derusting equipment electrical control system | 1 set |
| No. | Description | Qty. |
|---|---|---|
| 1 | Coating transmission system | 1 set |
| 2 | Intermediate frequency heating system | 1 set |
| 3 | Epoxy spraying system | 1 set |
| 4 | Automatic feeding dryer | 2 sets |
| 5 | SJ-65/30 single screw high-efficiency extruder | 1 set |
| 6 | SJ-120/30 extruder | 1 set |
| 7 | Hot melt adhesive extrusion die head | 1 set |
| 8 | PE sheet extrusion die head | 1 set |
| 9 | Hot melt adhesive / PE sheet pressing device | 1 set |
| 10 | Stainless steel powder spraying chamber | 1 set |
| 11 | Cooling water spray system | 1 set |
| No. | Description | Qty. |
|---|---|---|
| 1 | Steel pipe loading platform | 1 set |
| 2 | Derusting transition platform | 1 set |
| 3 | Finished pipe storage system | 1 set |
| 4 | Hydraulic system | 3 sets |
| No. | Description | Qty. |
|---|---|---|
| 1 | PE grooving device | 2 sets |
| 2 | Hydraulic elevating pipe turner | 2 sets |
| 3 | Operating cabinet | 1 set |
Qingdao Huashida Machinery Co., Ltd. is one of the leading professional manufacturers and exporters of anti-corrosion and insulation equipment in China.
With more than 20 years of industry experience and strong R&D and customization capabilities, we provide both standardized and tailor-made solutions for customers worldwide.
