Huashida 3-Layer Polyethylene (3LPE) Pipe Coating Line is designed to provide high-performance anti-corrosion protection for steel pipes used in oil, gas, water supply, district heating, and other pipeline transmission systems.
This internationally recognized coating system combines epoxy powder, adhesive, and polyethylene into one integrated protective layer, delivering excellent corrosion resistance, strong mechanical protection, and long-term durability for buried and underground pipelines.
A 3LPE anti-corrosion steel pipe is composed of three bonded protective layers, each playing a critical role in pipeline protection:
Applied directly to the steel surface, this layer ensures:
Excellent adhesion
Strong initial corrosion resistance
Reliable bonding foundation
A specially formulated copolymer adhesive layer that:
Bonds the epoxy powder to the PE outer layer
Improves interlayer strength
Enhances coating stability
The outer polyethylene coating provides:
Mechanical protection
Moisture resistance
Impact and abrasion resistance
Long-term environmental protection
Together, these three layers form a strong, durable, and highly reliable anti-corrosion coating system firmly bonded to the steel pipe surface.
Huashida’s production line supports two mature coating methods:
Both methods ensure uniform coating thickness, strong adhesion, and stable product quality.
The 3LPE coating system provides outstanding resistance against corrosion, chemicals, soil stress, and moisture, significantly extending the service life of steel pipelines.
Pipelines coated by this system can achieve a service life of 30–50 years with minimal maintenance.
The PE outer layer provides excellent:
The coating maintains stable performance even under:
The polyethylene outer layer has very low water absorption, effectively preventing water penetration and protecting the steel pipe body.
The combination of:
ensures excellent coating integrity and anti-corrosion reliability.
With high sealing performance and long-term durability, the coating helps reduce:
The line features:
Huashida 3LPE anti-corrosion coating line is widely used for the production of steel pipes in:
Oil Transmission Pipelines
Gas Transmission Pipelines
Urban Gas Supply Networks
Water Supply Pipelines
District Heating Pipelines
Industrial Fluid Transmission Pipelines
It is especially suitable for buried steel pipes and underground pipeline projects requiring long-term corrosion protection.
Huashida’s integrated coating line follows a complete and efficient production process:
Steel Pipe Uploading
→ Pipe Screw Conveyor
→ Shot Blasting / Rust Removal
→ Intermediate Frequency Heating
→ Epoxy Powder Coating
→ Adhesive & Polyethylene Outer Layer Coating
→ Cooling Spray
→ Pipe Screw Conveyor
→ Pipe End Grinding / Beveling
→ Pipe Unloading
This process ensures:
| Item | Specification |
|---|---|
| Pipe Diameter Range | 50mm – 4200mm |
| Processing Capacity | ≥ 250 m²/h |
| Cleaning Level | ≥ Sa2.5 |
| Coating Materials | Epoxy Powder, Adhesive, Polyethylene |
Qingdao Huashida Machinery Co., Ltd. is a professional manufacturer specializing in plastic pipe machinery, municipal pipe equipment, pipe insulation and anti-corrosion machinery, as well as pipeline joint coating and anti-corrosion materials.
With more than 20 years of manufacturing experience, Huashida is committed to providing customers worldwide with high-quality equipment, complete production solutions, and reliable technical support.
Our product range mainly includes:
