Electric resistance welding tube mill is used: For low-pressure fluid transmission, machinery manufacturing, electric power engineering, etc. LF19-76 High-Frequency Tube Mill Production Line / high-frequency straight seam pipe making machine / ERW Tube Mill Line is designed to produce welded pipes of Φ19mm～Φ76mm O.D. Of round pipe and Round pipe δ0.6mm～2.5mm, Square pipe δ≤2mm in wall thickness.

High Pressure Steel Pipe Making Machine ERW Tube Mill

ERW Tube Mill Line is an advanced manufacturing setup specifically designed for high frequency resistance welding of steel tubes and pipes. This efficient system provides a reliable and precise method for producing high quality products. By utilizing high frequency resistance welding, the ERW Tube Mill Line ensures a strong and durable bond between the steel tubes, resulting in superior strength and integrity.

Welded Pipe Making Machine

• working flow

Raw material (steel coil) → uncoiling → leveling →shearing and butt-welding → material accumulating → non-power leveling →mill-forming → high-frequency welding → removing burrs outside of weld seam → Zinc spraying → cooling → sizing → roughly straightening → computer controlled fixed length cutting → run-out table

• Machine parts details ERW Tube Mill Line

1.uncoiler two types: hydraulic expanding

Structure type: Double-side 180ºrotary hydraulic expanding tightly, which ensures steel coil feeding alternatively and makes steel strip going into accumulator freely.

2.Shear and butt-welder

Shearing and butt-welder, which ensures double steel tidily and then welding and leveling weld seam and supply strips for the accumulator.

3. Horizontal accumulator

It has two AC motors: one is a feeding motor and the other is a driven motor, and ensures steel strips inputting and outputting for forming.

Diameter of accumulator: Ф12M

Feeding motor: 55KW

Driven motor: 15*7.5KW

Steel ERW Welding Pipe Mill

4.FORMING MACHINE

Mainly roughly mill-forming steel strips and controlling weld seams.

5. Guide and squeeze and scraper

One set of guide rolls stands for controlling the direction of the pipe seam to ensure the pipe seam flatly and straightly enters into extruding rollers.1 set of extruding roll stands for controlling weld seam to realize successful welding.Two sets of scraper frames for scraping outside weld seam

6. Zinc spraying or Arcspray Process :

The tube is produced by the Electrical Resistance Welding (ERW) of the longitudinal seam. By using a pre-coated steel strip
[zinc coating (galvanized), aluminum coating (aluminized), or Zn/Al Alloy Coating], a tube with enhanced corrosion resistance can be produced. During the welding process, the external coating around the weld area is damaged by the heat generated around the weld area and the subsequent tooling operation and should be re-protected this area of the tube will corrode.

The re-protection of this weld damage is by using a metal sprayed deposit with a material that affords similar corrosion-resistant properties to the strip pre-coat. This method is in line with the repair is the only way available that offers the flexibility of producing tubes with zinc, aluminum, or Zn/Al coatings.

7. Cooling type: Sink and shower

8. Sizing of ERW tube mill line

Sizing device: Mainly fine-shaping pipe after welding and controlling size accuracy. Every 6 sets of a horizontal roll stand, vertical roll stand, and drive gearbox, 12 sets of the universal shaft. (structure same as forming device)

ERW pipe mill line

9. Roughly straightening machine frame

This unit is used for straightening the pipe after sizing, to reach the required straightness.

10.Main driven motor

11.Computer-controlled cutting machine

Usage: Cutting online as per the setting length

12. Run-out table

Welded frame structure equipped with sizing signal system