Automated Drill Pipe Internal Coating and Surface Treatment Production Line

Advanced Automated Drill Pipe Internal Coating and Surface Treatment Production Line

Overview: CoatTech's turnkey automated drill pipe surface treatment and internal coating production line integrates high-efficiency sandblasting, precision multi-stage chemical pretreatment, hot air drying, and heavy-duty internal anti-corrosion painting into a unified, high-capacity workflow designed for global oilfield and industrial piping standards.

1. System Architecture & Equipment Configuration

To achieve optimal corrosion resistance and uniform coating thickness, our engineering design features a modular layout equipped with heavy-duty industrial machinery:

1. Sandblasting System: Equipped with a high-performance sandblasting descaling machine and a cartridge dust filtration system to ensure ideal surface roughness (Sa 2.5) for superior coating adhesion.

2.Pretreatment Stations: Dedicated immersion/spray degreasing and multi-stage water washing stations to thoroughly eliminate oil, grease, and chemical residues from internal lumens.

3. Drying & Thermal Stations: Hot air drying units for moisture elimination, followed by dual specialized drying rooms operating at 180°C for high-temperature paint curing.

4.Coating & Sealing Zone: Precision painting stations featuring a spray booth sealing unit that creates a controlled negative pressure zone to prevent paint overspray and environmental leakage.

5.Material Handling: 6 heavy-duty transfer trolleys and 8 mobile transport carts operating on floor-guided positioning slots for seamless batch transitions.

6. Environmental Protection: Integrated activated carbon adsorption system designed for efficient exhaust air treatment and volatile organic compound (VOC) filtration during painting and thermal baking.

2. Complete Operational Workflow

The systematic workflow is meticulously sequenced to eliminate bottlenecks and guarantee inspection-ready inner wall quality:

1. Manual Loading: Drill pipes are loaded onto movable trolleys (4 pipes per trolley, laid flat).

2. Surface Preparation: Transferred to sandblasting machines for interior rust and scale remova.

3. Chemical Pretreatment: Advanced spray degreasing followed by dual-stage water rinsing.

4. Moisture Removal: Hot air drying station removes residual water to prevent flash rusting.

5. Internal Painting: High-performance painting applies heavy coatings (≥150μm) inside the negative-pressure booth.

6. Thermal Curing: Pipes are shifted to 180°C drying rooms for 30 minutes of baking and cooling.

7. Inspection & Offloading: Final verificantion using industrial endoscopes and magnetic thickness gauges before manual offloading.

3. Production Capacity Analysis

4. Quality Assurance & Inspection

To guarantee compliance with strict international anti-corrosion specifications, every batch undergoes strict non-destructive evaluation:

1. High-Resolution Industrial Endoscopes: Used for thorough visual inspection of inner walls, detecting micro-defects, sagging, or pinholes in blind lumens

2.Specialized Magnetic Thickness Gauges: Deployed for precise, non-destructive measurement of paint film thickness (≥150μm requirement) across hidden internal surfaces.

5. Why Choose CoatTech Intelligent Equipment

CoatTech Intelligent Equipment (Guangzhou) Co., Ltd. delivers turnkey coating automation solutions engineered for durability, precision environmental compliance, and high throughput. Contact our overseas engineering team today to customize your oilfield pipe coating line layout.

If you handle Automated Drill Pipe Internal Coating, Surface Treatment Production Line, Sandblasting Descaling, Negative Pressure Spray Booth, Thermal Curing, and Activated Carbon Adsorption System,Please call me

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