3LPE Coating Equipment with PLC Control System for SA2.5 Surface Preparation and 50-100 Years Lifespan
3LPE (Three-Layer Polyethylene) Steel Pipe External Coating Equipment for Oil & Gas Pipelines, Civil Gas and Water Supply Systems
Product Description
The three-layer PE process uses epoxy powder coating as the bottom layer and is bonded with polyethylene (PE) and adhesive to provide robust anti-corrosion protection for steel pipes. This method is widely adopted domestically and internationally for oil and gas pipelines, as well as civil gas and water supply systems.
Technological Process
Upload Pipes
→ Screw Conveyor for Pipes
→ Rust Removal (Intermediate Frequency Heating)
→ Epoxy Powder Coating Application
→ Outer Layer Coating (Solid/Liquid & Polyethylene Coating)
→ Cooling Spray
→ Screw Conveyor for Pipes
→ Grinding Pipes
→ Unload Pipes
Equipment Features
- Extended Service Life: extend lifespan from 5–10 years to 50–100 years
- Excellent Corrosion Resistance: epoxy powder base layer + PE + adhesive corrosion barrier
- High Mechanical Strength: withstand external physical impacts and wear
- Good Electrical Insulation: help prevent electrical corrosion
- Environmentally Friendly: minimize pollution and reduce harmful substance release
- High Degree of Mechanization: stable process parameters, improved efficiency, reduced labor intensity
- Versatile Applications: oil, gas, water supply, gas supply industries
- Low Maintenance Costs: reduced long-term operational expenses
- Strong Adhesion: tight bonding of the three-layer structure to the steel pipe
- Good Thermal Stability: suitable for high/low temperature environments
Product Parameters
Steel Pipe Outside Shot Blasting / Derusting Operation Line
| No. | Description | Qty. |
|---|---|---|
| 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 wind blower | 1 set |
| 6 | Derusting equipment electrical control system | 1 set |
Steel Pipe Outside Spiral 3PE Production Line
| No. | Description | Qty. |
|---|---|---|
| 1 | Coating transmit 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 press device | 1 set |
| 10 | Stainless steel spray powder chamber | 1 set |
| 11 | Cooling water spray system | 1 set |
Platform System
| No. | Description | Qty. |
|---|---|---|
| 1 | Steel pipe up load platform | 1 set |
| 2 | Derusting transition platform | 1 set |
| 3 | Finished pipe storage system | 1 set |
| 4 | Hydraulic system | 3 sets |
Grooving System
| No. | Description | Qty. |
|---|---|---|
| 1 | PE grooving device | 2 sets |
| 2 | Hydraulic elevating pipe turner | 2 sets |
| 3 | Operating cabinet | 1 set |
FAQ
Q1. What is the size of pipe diameter your equipment can produce?
A: We can produce four main models:
- Diameter 48–219 mm
- Diameter 219–1220 mm
- Diameter 800–1600 mm
- Diameter 1000–2400 mm
Q2. What is the descaling grade?
A: SA2.5
Q3. What is your anti-corrosion coating standard?
A: Our equipment meets: SY/T0413-2002, GB/T23257-2009, DIN 30670, DIN 30678, and relevant coating specifications from the American Corrosion Association and DNV; fully compliant with SY/T0315-2005 and CNPC38-2002.
Q4. What is the delivery time?
A: 2–3 months after deposit.
Q5. What is the production output?
A: Output varies by pipe diameter, with maximum 3 to 8 km/day and annual processing capacity up to 2 million square meters (Φ508 mm).
Q6. What is the coating thickness?
A: 80–800 µm
Q7. In which countries have you sold your 3PE equipment?
A: We have produced nearly 50 sets of 3PE processing lines for countries including Russia, Iran, UAE, India, Belarus, Kazakhstan, and others.
Q8. What is your after-sales service?
A:
- Trial operation before delivery to ensure quality
- Mechanical parts warranty: 12 months from date of pick-up
- Electrical parts warranty: 6 months from date of pick-up
- Engineers sent to buyer’s factory to test equipment and train operators
Company Profile
Qingdao Huashida is one of the largest professional manufacturers and exporters of anti-corrosion and insulation equipment in China. With over 20 years of experience and strong R&D capabilities, we provide both standardized and customized solutions for global clients.
Main products include:
- HDPE jacket pipe for pre-insulated pipe Production Line (110–2000 mm)
- 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
Get in Touch
Have questions about our products or want to discuss a custom order? Our team is ready to help you.