3LPE pipe coating machine
3LPE coating machines are specialized equipment used to apply three-layer polyethylene (3LPE) corrosion protection to pipelines. This coating system consists of:
Fusion-bonded epoxy (FBE) base layer for adhesion and cathodic protection.
Copolymer adhesive middle layer bonding FBE to the topcoat.
Polyethylene (PE) top layer for mechanical and environmental protection.
Below is a detailed analysis of their technology, components, innovations, and market trends:
Preheating System:
Uses induction heating (e.g., 50–300°C) to prepare pipe surfaces for FBE adhesion.
Extrusion System:
Dual extruders: One for adhesive copolymer (170–250 μm), another for PE topcoat (~2 mm).
Rotary Application Module:
For bend pipes, a rotating mold applies molten PE while moving along the pipe's curvature. Critical for uniform coating on complex geometries.
Sealing & Pressure Control:
High-pressure seals prevent leakage during rotation. Advanced machines use dual-seal systems (wear-resistant + gas seals).
Cooling & Curing:
Water-cooling zones solidify the coating rapidly after application.