The three-layer HDPE stripe winding process, with epoxy powder coating as bottom layer and binding adhesive as second layer, is the widely used technique in steel pipe anti-corrosion all over the world. The anti-corrosion steel pipe are applied in oil, gas and water supply pipelines.
Three-Layer structure of 3PE anti-corrosion pipe
The three-layer PE anti-corrosion structure includes fusion bonded epoxy-powder bottom layer, polymer adhesive middle layer and polyethylene outside layer. The epoxy powder is a kind of thermosetting nontoxic coating, forming the high molecular weight cross-linking structure coating after solidifying, featuring good chemical anti-corrosion and high mechanical properties. Function of epoxy layer is to form continuous coating and to provide the steel tube surface with good chemical resistance and cathodic disbanding resistance. The function of polymer adhesive is to agglutinate the epoxy layer and the polyethylene outside layer, which unites all three layers together. The polyethylene layer protects the pipe from abrasion, bump and water.
First layer is Fusion bonded epoxy layer (FBE> 100µm), the second layer is adhesive (AD) 170 ~ 250µm, and the third layer is polyethylene (PE) stripe 2.5 ~ 3.7mm.
3PE steel coating pipe has the features of high mechanical strength, excellent electrical insulation performance, Process accuracy and environmental friendliness.
Huashida 3lpe fbe Coating Line - Smarter, Faster, Cleaner
From rust removal to finished pipes - all in one line.
PLC fully automatic control, high efficiency, energy saving.
Eco-friendly system with high-efficiency powder recovery.
Upgrade your pipeline protection with reliable, customized solutions.
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Technological process of 3LPE coating:
Pipe uploading→Shot blasting→Medium frequency induction heating→Epoxy powder spraying→Adhesive and polyethylene coating→Water cooling→Pipe end cutting back→Bevelling→Pipe unloading
The line can be customized to fit individual layout and application.![]()
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-Adopt advanced technology
-Stable operation
-High degree of automation, saving labor costs
-Good anti-corrosion quality, meets international standard
-Provide process design - installation - commissioning - technical training full link services to ensure that customers quickly put into production
-Share you 389 sets of production experience from all the world
-We have a top technical team of 9 professional senior engineers
-Possessing a domestic high - end expert workstation for plastic machinery and equipment
Main Equipment List
| No. | Name | Set |
| A. Derusting Equipment | ||
| 1 | Pipe wheel conveyor | 1 |
| 2 | Shot Blasting Machine | 1 |
| 3 | Cyclone Dust Collector | 1 |
| 4 | Pulse dust collector | 1 |
| 5 | Centrifugal exhaust fan | 1 |
| 6 | Rust removal equipment PLC | 1 |
| B. Coating equipment | ||
| 1 | Pipe wheel conveyor | 1 |
| 2 | Induction heating device | 1 |
| 3 | Powder spraying device | 1 |
| 4 | Automatic loading dryer | 2 |
| 5 | SJ-65/30 Extruder | 1 |
| 6 | SJ-120/30 Extruder | 1 |
| 7 | Hot melt adhesive extruder die | 1 |
| 8 | PE sheet extruder head mold | 1 |
| 9 | Hot melt adhesive/PE sheet coating device | 1 |
| 10 | Environmental Protection Ventilation equipment | 1 |
| 11 | Cooling Spray equipment | 1 |
| C.Platform Equipment | ||
| 1 | Steel pipe uploading platform | 1 |
| 2 | Downloading platform | 1 |
| 3 | Pipe storage platform | 1 |
| 4 | Turnover machanism | 3 |
| D.Groove Equipment | ||
| 1 | PE Beveling Machine | 2 |
| 2 | Hydraulic Lifting and Turning Machinery | 1 |
| 3 | Hydraulic Equipment | 1 |
| 4 | PLC automatic control system | 1 |
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