3PE anti-corrosion coating is that the steel pipe is protected by three layers to prolong the life of service from 5-10years to 50-100years.
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.Application
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.Technological flow
Upload pipes→pipes conveyor→rust removal→intermediate frequency heating→Epoxy powder coating→Middle layer &polyethylene stripe winding→water cooling→pipes conveyor→ pipe chamfer→unload pipes
Blasting machinery
steel pipe conveyor
FBE Coating machinery
PE/PP layer wrap extruder line Product Parameters
Main Equipment of 3PE anti-corrosion coating processingNo. | Name | Set |
A. Derusting Equipment |
1 | Pipe-conveying Equipment | 1 |
2 | Shot Blast Cleaning 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 | Coating transfer equipment | 1 |
2 | IF heating device | 1 |
3 | Powder spraying device | 1 |
4 | Automatic loading dryer | 2 |
5 | SJ-65/30 Extruder | 1 |
6 | SJ-180/30 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 platform | 1 |
2 | Post-rust removal transition platform | 1 |
3 | Product tube storage platform | 1 |
4 | Hydraulic Equipment | 3 |
D.Groove Equipment |
1 | PE Beveling Machine | 2 |
2 | Hydraulic Lifting and Turning Machinery | 1 |
3 | Hydraulic Equipment | 1 |
4 | PLC | 1 |
E.Compressed air Equipment |
1 | Screw Air Compressor | 1 |
2 | Cold dry machine | 1 |
3 | Precision filters | 3 |
4 | Gas tanks | 1 |
Company Profile
Qingdao Huashida Machinery Co., Ltd was established in 2003. Since
its
inception, Huashida has focused on plastic polyurethane insulation
pipe
production line, 3PE anti-corrosion pipe production line, large
diameter
underground pipe production line and plastic pipe joints for 20
years.
We always attach great importance to research and development,
collaborating closely with Tsinghua University, Beijing University
of
chemical technology, South China university of technology and
scientific
research institutions. by absorbing advanced technology home and
abroad, we now rank one of the top 3 manufacturers in the industry
in
China.