Internal Epoxy Liquid Spray Coating Line for steel pipe corrosion protection with external 3LPE shot blasting

Internal Epoxy Liquid Spray Coating Line for steel pipe corrosion protection with external 3LPE shot blasting 

The integrated 3LPE pipe coating line—featuring shot blasting, internal liquid epoxy spraying, and a curing process—forms a highly efficient corrosion protection system for steel pipes.

The external three-layer polyethylene (3LPE) coating employs a multi-stage composite design. It starts with a fusion-bonded epoxy powder base layer that provides essential corrosion inhibition. A specialized copolymer adhesive is then applied to ensure durable interlayer bonding, followed by an outer polyethylene sheath that delivers strong mechanical protection and sustained resistance to environmental exposure.

For internal protection, a liquid epoxy coating is spray-applied to the pipe interior. This lining exhibits excellent adhesion and outstanding chemical resistance, effectively preventing corrosion caused by transported substances including oil, natural gas, and water.

This dual-sided coating approach is widely used in oil and gas transmission pipelines, water supply networks, and drainage systems. It substantially extends the operational lifespan of pipelines while enhancing their reliability.

Huashida provides high-performance, innovative, and cost-effective coating solutions. With specialized expertise in integrating internal liquid epoxy linings and external 3LPE coatings, we support global clients in achieving extended pipeline service life, lowered maintenance expenses, and dependable project delivery.

Production Line Specifications:
(1) Pipe Diameter Range: 114 mm - 4200 mm
(2) Processing Capacity: ≤250 m²/h
(3) Cleaning Standard: Sa 2.5 Grade
(4) Materials Used: Epoxy Powder, Adhesive, Polyethylene, Epoxy Coating (Single-Component, Two-Component)

Main Equipment (Please contact us for customizing your production line)