3PE 3lpe Steel Pipe Anticorrosion Layer Application Coating Line
Description
The coating manufacturing process consists of the following
operations:
The surface blast cleaning to Sa 2 1/2 acc.To ISO 8501-1,
The electrostatic spraying of epoxy powder onto a heated pipe,
Wrapping a pipe with extruded copolymer,
Wrapping a pipe with polyethylene/polyetylene in continuous way,
Cooling the coating and dressing the pipe ends.
An extruded polyethylene coating has higher mechanical properties
in comparison with cold applied polyethylene tape
coating.Anti-corrosive coatings made of three-layer PE/PP are
characterized by:
High mechanical strength,high adherence of the coating to the
pipe,guaranteed long
lastinganticorrosiveprotectionofundergroundpipelines for minimum 50
years,100% protection of weld zone of coated longitudinally and
spirally welded pipes,suitability for bending of coated steel
without damaging the insulation layer.
Technological processes
Upload pipes→pipes screw conveyor→rust removal of intermediate frequency heating→Epoxy powder coating→outer layer soli quid & polyethylene coating→cooling spray→pipes screw conveyor→grinding pipes, send→unload pipes
Main Equipment List
| No. | 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 |
