ERW Tube Mill Line

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.

Welded Pipe Making Machine

Ⅰ. PRODUCE CAPACITY

Ⅱ STEEL STRIPS SPECIFICATION

Ⅲ working flow

Raw material (steel coil) → uncoiling → 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 → fixed-length cutting → run-out table

ERW Steel Pipe Making Machine

Ⅳ. machine parts details ERW Tube Mill Line

4.1uncoiler two type: hydraulic expanding

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

4.2 Shear and butt-welder

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

4.3 Horizontal accumulator

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

Diameter of accumulator: Φ4500㎜

Feeding motor: YCT250-4A 18.5KW

Driven motor: YCT250-4B  22KW

Steel ERW Welding Pipe Mill

4.4 FORMING MACHINE

Mainly roughly mill-forming steel strip and controlling weld seam.

4.5 Guide and squeeze and scraper

One set of guide roll stand for controlling direction of pipe seam to insure pipe seam flatly and straightly entering into extruding rollers.1 set of extruding roll stand for controlling weld seam to realize successful welding.Two sets of scraper frame for scraping outside weld seam

4.6 Zinc spraying or Arcspray Process :

Repairing the welding seam Zinc surface

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 gets 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 which offers the flexibility of producing tubes with zinc, aluminum or Zn/Al coatings.

4.7 Cooling type: Sink and shower

4.8 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

4.9 Roughly straightening machine frame

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

4.10 Main driven motor

4.11 Computer-controlled cutting machine

Usage: Cutting online as per the setting length

4.12 Run-out table

Welded frame structure equipped with sizing signal system

4.13 200KW High-Frequency Welder

The power of H.F. welder is 200KW

Ⅵ. Facilities prepared from Customer Side