The 3PE (Three-Layer Polyethylene) coating is an advanced anti-corrosion system consisting of fusion-bonded epoxy (FBE) as the inner layer, adhesive (AD) as the bonding middle layer, and polyethylene (PE) as the protective outer layer.
This multi-layer structure provides excellent mechanical strength, superior electrical insulation, stable processing performance, and environmental sustainability, making it ideal for oil and gas pipelines, urban water supply, and district heating networks.

Pipe Loading → Conveying → Shot Blasting (Rust Removal) → Induction Heating → FBE Coating → AD & PE Extrusion Coating → Water Cooling → Conveying → Pipe End Grinding → Unloading

Main Equipment Composition

Surface Treatment: Shot blasting machine, cyclone dust collector, pulse dust remover

Heating System: Induction heating equipment

Coating System: FBE powder coating unit, adhesive extruder, PE extruder

Cooling System: Water spraying and cooling device

Conveying System: Pipe loading/unloading platform, turning rollers

Control System: PLC automatic control system

Auxiliary Equipment: PE beveling machine, hydraulic lifting system, exhaust & ventilation system

Cost Reduction - High sealing performance, energy-saving, and environmentally friendly.

Long Service Life - Easy installation and construction, lifespan up to 30-50 years.

Excellent Impact Resistance - Performs well even under low temperatures; low water absorption.

Superior Anti-Corrosion Performance - Reliable protection with simple and economical process.

Fully Automatic Operation - PLC control with intelligent sensors for position, speed, and energy monitoring ensures precision and efficiency.

3-layer PE coated steel pipes are widely used in:

Oil and gas transmission pipelines - providing long-term protection against corrosion and external damage.

Urban gas and water supply systems - ensuring safe, clean, and reliable transport of fluids.

District heating networks - maintaining insulation and corrosion resistance under high-temperature conditions.

Underground and industrial anti-corrosion projects - offering durable protection for buried and exposed steel pipelines.

Global Application:

This advanced coating technology has been successfully applied in major infrastructure projects both domestically and internationally.

Products are exported to Europe, the Middle East, Central Asia, Africa, Russia, and other regions worldwide.

Our team

Delivery

Exhibition

Certifications

1. company profile

Qingdao Huashida Machinery Co., Ltd. is located in Qingdao High & New Technology Industrial Area- Qingdao Huashida industrial Park, covers an area of about 4000 square meters. We have tens of years experience in plastic pipe, sheet, and board extrusion lines, and pipe joints and welding tools such as heat shrinkable sleeve, Electro fusion sleeve etc.

2. main products

Our main products include as following,HDPE PU pre-insulation Jacket Pipe extrusion line,3PE steel pipe anticorrosion&coating machinery,Rubber&plastic foam flexible insulation tube/sheet production line,HDPE water supplying pipe extrusion line,PE PP sheet board extrusion line,Heat shrinkable sleeve production line,Hollow wall spiral pipe production line,Plastic welding rod extrusion line,Radiation cross-linked PE heat shrinkable sleeve,Electro fusion tape,Portable extrusion welder.

Our machines make products what are widely used as jacket pipe of PU foam insulation pipe in municipal heating pipe system; Municipal water supplying and drainage pipeline; Oil and gas pipeline; Pipe joints of plastic drainage water pipes, PU foam insulation pipelines, 2PE/3PE oil and gas pipelines;
Besides manufacturing machines, we also make Heat shrinkable sleeves and electro fusion sleeves and plastic welders, which are widely used as pipe joints and sealings of plastic drainage water pipes, PU foam insulation pipelines, 2PE/3PE oil and gas pipelines;

4. Our certificates and Patents

5. Global market
Our purpose is to supply highest cost-effective products and the most suitable solutions to our clients, as well as intimate help and service, on this basis we reach a win-win situation.
For over 14years We have exported to many foreign countries, such as Russia, Iran, Turkey, U. A. E, Sudan, Ukraine, Uzbekistan, Azerbaijan, South Asia, Poland etc.

6. Core Team

The guarantee period is 12 months from the date of installing, but no more than 14 months from the date of delivery. After this period we are obliged to provide with lifelong service at the expense of Buyer.During the warranty period we are responsible to provide trouble shootings and help the customer to solve the problems, provide spare parts which are broken, except breakings caused by the Buyer.We will provide the technical service train the workers from the buyers for free.We can also send technicians to the buyer's companies abroad for help installation and testing the lines. But the buyer shall pay for the round trip tickets, accommodation, transportation, medicine treatment and insurance of the technicians in foreign countries and some salary accordingly.