3LPE Coating Line for Steel Pipes with FBE and Polyethylene

The three-layer polyethylene (3LPE) process uses fusion-bonded epoxy (FBE) as the bottom layer, adhesive (AD) as the middle layer, and polyethylene (PE) as the outer layer. This structure provides superior corrosion protection for steel pipes, extending service life from 5-10 years to 50-100 years.
It is widely applied in oil and gas pipelines, as well as urban gas and water supply pipelines. The 3LPE coating offers high mechanical strength, excellent electrical insulation, and strong resistance to environmental degradation.

Technological Process
Pipe loading
Screw conveyor transportation
Rust removal & intermediate frequency heating
Epoxy powder coating (FBE)
Outer adhesive & PE coating (solid/liquid)
Cooling spray
Screw conveyor transportation
Grinding
Pipe unloading

Coating Structure & Thickness
First layer: Fusion bonded epoxy (FBE) > 100 μm
Second layer: Adhesive (AD) 170-250 μm
Third layer: Polyethylene (PE) 2.5-3.7 mm
Available Pipe Diameter Ranges (Four main models):
Φ48-219 mm
Φ219-1220 mm
Φ800-1600 mm
Φ1000-2400 mm
Descaling Grade: SA 2.5
Coating Thickness: 80-800 μm
Standards Compliance: SY/T0413-2002, GB/T23257-2009, DIN 30670, DIN 30678, American Corrosion Association, DNV, SY/T0315-2005, CNPC38-2002, and related international standards.
Production Capacity
Max. output: 3-8 km/day (depending on pipe diameter)
Annual capacity: 2 million m² (for Φ508 mm pipes)

Qingdao Huashida is one of the largest professional manufacturers and exporters of anti-corrosion and insulation equipment in China. With over 20 years of experience and strong R&D capabilities, we offer both standardized and customized solutions for global clients.