ERW steel pipe production machine

Electric Resistance Welding (ERW) steel pipe production machines are specialized equipment used for manufacturing steel pipes through a welding process that uses electrical resistance to generate heat. This method is efficient and produces high-quality pipes suitable for various applications. Here’s an overview of the ERW steel pipe production process and the machines involved:

1. Uncoiler and Straightener

Uncoiler: This machine unwinds the steel coils, feeding the steel strip into the production line.

Straightener: Ensures the steel strip is flat and free of any bends or irregularities before further processing.

2. Shear and End Welder

Shear: Cuts the steel strip to the required width.

End Welder: Welds the ends of two strips together to create a continuous strip, ensuring uninterrupted production.

3. Accumulator

Stores a large amount of steel strip to allow continuous operation of the welding line while the uncoiler is reloaded.

4. Forming Section

Forming Rolls: Gradually shape the flat steel strip into a round pipe through a series of rolls.

Edge Milling Machine: Prepares the edges of the strip for welding by trimming and shaping them.

5. Welding Section

High-Frequency Welder: Uses electrical resistance and heat to weld the edges of the pipe together. This process creates a strong and consistent weld seam.

Squeeze Rollers: Apply pressure to ensure a solid and defect-free weld.

6. Sizing and Shaping

Sizing Mill: Further shapes and sizes the welded pipe to precise dimensions.

Turk's Head: Ensures the roundness and uniformity of the pipe.

7. Cooling Section

Uses water or air to cool the welded pipe before further processing.

8. Non-Destructive Testing (NDT)

Ultrasonic Testing: Inspects the weld seam for internal defects.

Eddy Current Testing: Detects surface defects in the pipe.

9. Cutting Section

Flying Saw: Cuts the continuous pipe into required lengths without stopping the production line.

10. End Finishing

Deburring Machine: Removes any burrs or sharp edges from the ends of the pipes.

End Facing Machine: Ensures the pipe ends are smooth and even.

11. Hydrostatic Testing

Tests the pipes for leaks and structural integrity under high pressure.

12. Marking and Coating

Marking Machine: Marks the pipes with necessary information like size, grade, and manufacturer.

Coating Machine: Applies protective coatings to the pipes to prevent corrosion.

13. Packaging

Bundling Machine: Bundles the pipes together for easy handling and transport.

Packaging Line: Prepares the bundled pipes for shipment, ensuring they are securely packed.