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Product Overview:
The 3LPE (Three-Layer Polyethylene) Steel Pipe Coating Production Line by Qingdao Huashida Machinery Co., Ltd. is engineered for high-performance anti-corrosion coating of steel pipes. This line supports pipe diameters ranging from 159mm to 1400mm, with an extrusion capacity up to 350 kg/h, customizable to specific production requirements.
This advanced production line is the result of years of dedicated development and innovation, fulfilling the increasing market demand for durable, efficient, and high-performance anti-corrosion solutions.
The 3LPE anti-corrosion coating system comprises:
Fusion-Bonded Epoxy (FBE) Primer Layer
Thermosetting, non-toxic coating that cures into a high molecular weight, cross-linked structure.
Provides excellent chemical corrosion resistance and superior adhesion.
Polymer Adhesive Middle Layer
Typically a polyolefin copolymer (e.g., vinyl copolymer) that chemically bonds with both the epoxy primer and polyethylene top layer.
Polyethylene (PE) Top Layer
Ensures high mechanical protection and environmental resistance, ideal for buried pipelines.
This 3-layer coating structure ensures superior adhesion, excellent mechanical strength, and long-lasting anti-corrosion performance, making it widely used in oil & gas pipelines, urban gas distribution, and water transmission lines.
Pipe Loading
Screw Conveyor Transfer
Surface Cleaning & Induction Heating
Epoxy Powder Coating
Adhesive and Polyethylene Extrusion Coating
Cooling Spray Treatment
Pipe Unloading & Grinding
Pipe Diameter Range: 159mm - 1400mm
Extrusion Output: ≤350 kg/h
Application: Steel pipe external anti-corrosion coating for buried pipeline systems
Configuration list
| No. | Name | Unit | Qty | Remarks | |||||
| External cleaning and 3PE system of the steel pipes | |||||||||
| 1 | Flatform of Upload pipes | M | 15 | Combination of dual structure | |||||
| 2 | Hydraulic tube pulling machine | set | 8 | Double lift,lifting force more than 8T |
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| 3 | Air hydraulic station | Set | 3 | Air cooler, throttle valve | |||||
| 4 | Derusting spiral transmission line | M | 27 | Variable frequency speed regulation, solid tyre | |||||
| 5 | Synchronous dynamic spiral single-frame | Set | 2 | Variable frequency speed regulation, solid tyre | |||||
| 6 | The lower type shot blasting machine | Set | 1 | Max pipe diameter 1220mm | |||||
| 7 | Dedusting system | Set | 1 | first degree dust removal + pulse bag type dust collector | |||||
| 8 | transition platform line |
M | 15 | Combination of dual structure | |||||
| 9 | PE Spiral transmission line | M | 54 | Variable frequency speed regulation,solid tyre |
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| 10 | Intermediate frequency heater | Set | 1 | 800K |
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| 11 | Dynamic high temperature roller | Set | 1 | Variable frequency speed regulation |
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| 12 | Epoxy powder coating system | Set | 1 | Max pipe diameter 1220mm |
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| 13 | The powder room, vulcanization barrel | Set | 1 | Non inductive heating material |
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| 14 | two stage powder recovery device | Set | 1 | cyclones dust collector+ pulsed dust collector |
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| 15 | Automatic vacuum feeding machine | Set | 2 | 800kg/h+300kg/h |
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| 16 | SJ-180/30Extruder SJ-180/30Extruder |
Set | 1 | Q≈650kg/h 250KW DC,Q≈650kg/h |
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| 17 | SJ-65/30 Extruder SJ-65/30 Extruder |
Set | 1 | 45KW Q≈150kg/h 45KW AC,Q≈150kg/h |
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| 18 | Extruder moving mechanism | Set | 1 | Electric control | |||||
| 19 | Hot melt extrusion die head | Set | 1 | T die head | |||||
| 20 | PE sheet extrusion die mould | Set | 1 | T die head | |||||
| 21 | Hot melt adhesive PE coating device |
Set | 1 | Silicon rubber roller, double cylinder, internal water cooling |
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| 22 | Environmental protection ventilation system | Set | 1 | 4KW |
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| 23 | cooling spray system | Set | 1 | Water pump, water spray, pipelines, reflux tank | |||||
| 24 | The cooling splash-prevented plastic curtain-wall | Set | 1 | Approx 110m2 | |||||
| 25 | External anti-corrosion pipe unload platform | M | 15 | Combination of dual structure | |||||
| 26 | Pipe beveling grinding machine | Set | 2 | 4KW motor electrical control system of walking | |||||
| 27 | Dedusting system | Set | 2 | Pulse dust collect | |||||
| 28 | Hydraulic lifting rotary pipe device | Set | 1 | Hydraulic lift,the four round of the WPA direct drive | |||||
| 29 | The electrical control system of 3PE steel pipes production line | Set | 1 | main line of centralized control/individual/control PLC Control |
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| compressed air system | |||||||||
| 30 | Screw type air compressor | Set | 1 | 6m³/min,0.7MPa |
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31 |
freeze drying machine | Set | 1 | 6m³/min,Enter temperature≤80ºC | |||||
| 32 | Precision filter | Set | 3 | 0.1PPM |
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| 33 | Gas tank | PC | 1 | 1m³ | |||||
Qingdao Huashida Machinery Co., Ltd was established in 2003 and has focused on plastic pipe extruder production line and joints of plastic pipes and 2PE 3PE pipes machinery for over 16 years, we are a private high-tech enterprises integrated by R&D, manufacturing, selling, service and trading.
We are always concertrating on research and development of plastic extrusion equipments, tightly cooperating with Tsinghua University, Beijing University of chemical technology, South China university of technology and some other colleges and scientific research institutions. Meanwhile, by absorbing advanced technology home and abroad, we have been one of the top manufacturers of plastic extrusion machines in China, especially of PE insulation jacket pipe extrusion line, PE PP sheet extrusion line, and PE hollow wall spiral pipe production line.
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