Fully Automatic 3PE Pipe Coating Line, Automated Steel Pipe Anti-Corrosion Production System with PLC Control

Qingdao Huashida Fully Automatic 3PE Pipe Coating Line is a professional anti-corrosion coating system designed for DN114mm - DN1420mm steel pipes. This line features automatic pipe chasing and disconnecting system, electric lifting transfer carts (no hydraulic oil leakage), plc with recipe storage for one-click diameter changeover, automatic dust collection, minimal operator intervention (4-5 persons), delivering reliable coating quality for high-volume coating plants, labor-cost-sensitive markets, 24-hour continuous production facilities, large pipe mill coating operations.

With 280kW PE extruder and 1000kW intermediate frequency heating, this system is optimized for the Europe, North America, Middle East, high-labor-cost regions, large-scale production facilities market. Backed by over 20 years of manufacturing experience since 2003, with 58 invention patents, and 50+ successful installations worldwide, Huashida ensures stable operation, low maintenance cost, and coating quality that meets international standards.

 

1. Automatic pipe chasing and disconnecting system eliminates manual intervention in production flow

2. Electric lifting transfer carts (12-ton capacity each) avoid hydraulic oil leakage issues

3. PLC recipe storage enables one-click diameter changeover, reducing setup time by 70%

4. Automatic dust collection system maintains clean working environment with minimal operator attention

5. Only 4-5 operators required for full production line operation, significantly reducing labor cost

The anti-corrosion coating processing line includes:

Coating Process: 3PE coating optimized for oil & gas pipeline specifications

Standard 3PE Process Sequence:

Pipe Loading -> External Shot Blasting (Sa 2.5) -> Pipe Internal Air Purging
-> Pipe End Masking -> Intermediate Frequency Heating (~200deg C)
-> FBE Epoxy Powder Spraying -> AD Adhesive Extrusion & Wrapping
-> PE Extrusion & Wrapping -> Water Spray Cooling -> Joint Cutting
-> PE End Beveling -> Holiday Detection -> Finished Pipe Unloading

3. Key Configuration

This DN114mm - DN1420mm production line features 1000kW intermediate frequency heating, C-type coil, pure water cooling as its thermal core, precisely heating steel pipes to approximately 200deg C for optimal FBE powder curing.

The heating system incorporates C-type coils with pure water cooling and low-pressure protection (supply pressure >0.2MPa). Process intelligence is delivered through internationally recognized PLC with 10-inch industrial-grade HMI, enabling recipe storage for one-click diameter changeover across DN114mm - DN1420mm range. Variable frequency drives from internationally recognized brands ensure precise speed control, with industrial-grade electrical components throughout. Surface preparation uses external shot blasting machine, 2x37kw blast wheels, 350kg/minx2, sa 2.5 grade, achieving Sa 2.5 grade (ISO 8501-1) with 50-90um anchor profile depth.

Coating application employs SJ-65/30 single screw extruder, 45kW, max output 100 kg/h (adhesive) and SJ-120/33 single screw extruder, 280kW, max output 750 kg/h (polyethylene), both equipped with 38CrMoAlA nitrided screws (0.4-0.7mm nitriding depth, >HV740 hardness).

The FBE station uses multi-gun electrostatic spray with (n+1)x2 redundancy and >95% powder recovery. Pipe length capability is 6-15 meters (12m standard). Cooling is achieved through water spray quench (<=20deg C, >=0.3MPa, 26-30 m3/h), with end beveling via rotary peeler knife (~40 sec/pipe). Final quality control includes high-voltage holiday detection and thickness measurement. The line operates with 4-5 personnel and requires minimum 9-meter workshop height for large diameter models.

This coating line is specifically suited for:

• High-volume coating plants, labor-cost-sensitive markets, 24-hour continuous production facilities, large pipe mill coating operations

• Oil & gas transmission and distribution pipelines

• Municipal water supply and sewage pipelines

• Chemical plant process piping

• Mining and slurry transport pipelines

Target Market: Europe, North America, Middle East, high-labor-cost regions, large-scale production facilities

Export Countries: Russia, UAE, Saudi Arabia, Iran, Uzbekistan, Kazakhstan, Nigeria, South Africa, India, Thailand

4. Standards Compliance

This equipment is designed and manufactured in compliance with:

• GB/T 23257-2017

• DIN 30670

• ISO 21809-1

• ISO 8501-1 (Sa 2.5)

All coating parameters (FBE >=150um, AD >=170um, PE 3.3-4.2mm per GB/T 23257-2017) can be configured to meet project-specific inspection and test plans (ITP). Coating thickness calculated per formula: coating weight = surface area x thickness x material density.

Why Choose Qingdao Huashida

Qingdao Huashida’s large-diameter capability is industry-leading, with proven projects up to DN6600mm domestically and DN2540mm overseas. This extensive track record in large-diameter pipeline coating demonstrates the company’s ability to handle the most challenging pipeline coating requirements, including the DN114mm - DN1420mm range of this product line.

Established in 2003 and operating from a 33,000 m² facility in Qingdao, Huashida has accumulated over two decades of experience in pipeline anti-corrosion equipment. The company holds 58 invention patents, 38 utility model patents, and 38 software copyrights, with core technology originating from Germany and R&D partnerships with Beijing University of Chemical Technology. Globally, Huashida operates a production base in Uzbekistan and maintains a strategic partnership with Solution Berg Pipes Company in Saudi Arabia. Equipment has been exported to Russia, UAE, Saudi Arabia, Iran, Uzbekistan, Kazakhstan, Nigeria, South Africa, India, and Thailand, with multiple repeat-order customers demonstrating long-term satisfaction. For large-diameter pipeline projects, this proven capability translates to reliable equipment that has been validated in the most demanding applications worldwide.