Automatic Steel Pipe Oiling & Painting Line | ERW Pipe Coating Equipment Manufacturer – AIS MACHINERY

1. Equipment Overview

The Pipe Oiling & Painting Line is an essential post-treatment system in welded pipe production, designed to apply anti-rust oil or protective paint onto pipe surfaces.
Its main functions are to prevent oxidation and corrosion, enhance appearance, and extend storage life.
The system can be fully integrated with sizing, cutting, marking, stacking, and packaging sections for continuous and automated production.

2. Working Principle

After pipe cutting, each pipe is conveyed through the oiling and painting line in the following sequence:

1. Surface Cleaning

   • Dust, metal chips, and debris are removed by air knives or rotary brushes.

   • Optional wire brushing unit or electrostatic dust removal system can be added.

2. Oiling / Painting

   • Depending on customer requirements, the system can be configured for oil coating or paint spraying using air or electrostatic spray guns.

   • Coating material is pumped from a storage tank through a metering pump, ensuring accurate flow and pressure control.

   • The spray unit provides 360° full-surface coverage with consistent thickness.

3. Draining & Oil Recovery

   • After coating, pipes rotate slowly to allow excess liquid to drain and distribute evenly.

   • Recovered oil or paint is filtered and reused via the circulation system.

4. Drying / Curing

   • The coated pipes pass through a hot-air or infrared drying chamber to solidify the surface coating.

   • Electric or gas heating systems are available.

5. Cooling & Discharge

   • After drying, pipes are cooled and conveyed to marking, stacking, or packaging stations.

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3. Equipment Composition

• Infeed, coating, and outfeed conveyor sections

• Surface cleaning and dust removal unit

• Oiling/Painting spray system (spray guns, supply pumps, filtration system)

• Paint/Oil storage and metering unit

• Recycle and filtration system

• Drying chamber (hot-air circulation or infrared heating)

• PLC control cabinet and HMI panel

• Exhaust and environmental filtration system (optional)

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4. Technical Parameters (Reference Specifications)

5. Key Advantages

• Uniform Coating: Adjustable spray angle and consistent thickness.

• Energy-Saving & Eco-Friendly: Circulating recovery system reduces material waste.

• Intelligent Control: PLC automation with programmable parameters and recipe storage.

• High Compatibility: Suitable for various pipe sizes and production speeds.

• Easy Maintenance: Modular design for easy cleaning and component replacement.

• Custom Options: Available with gas heating, electrostatic spraying, or explosion-proof design.

6. Application Scope

Applicable to:

• ERW welded pipe lines

• Square & rectangular tube lines

• Structural, fluid, galvanized, and furniture pipe finishing lines

• Anti-rust oil coating section before pipe packaging

7. Optional Configurations

8. Typical Line Layout

From left to right:
Infeed conveyor → Surface cleaning → Coating section → Draining → Drying → Cooling → Outfeed conveyor

9. Customization & Integration

AIS MACHINERY provides fully customized solutions according to production requirements, including:

• Pipe diameter and speed matching design

• Coating oil/paint selection and compatibility testing

• Integration with existing pipe mills and automation control systems

• CE/UL-compliant electrical design for international customers

• Export packaging and on-site commissioning service