ERW tube mill is also called high-frequency longitudinal welded pipe production line. Suitable materials are hot-rolled or cold-rolled strip coils such as plain carbon steel and high-strength steel, etc. The strip steel is unrolled by the uncoiler, and then enters the accumulator storage after passing through the shear butt welding machine. The strip steel is extruded by rollers and divided into two parts: break-down section and fine pass section. After high-frequency induction welding and sizing part, output the required length of pipe, cut off by flying saw, and finally stack and pack the steel pipe. This production line is a comprehensive complete production line for continuous welding of steel strips into pipes, mainly composed of uncoiler, shear & end welder, accumulator, forming & sizing machine, H.F welder, flying saw, stacking & packing machine. If there are special purposes or requirements for steel pipes, it is necessary to add testing equipment, such as hydraulic testing machine, intermediate frequency annealing machine, ultrasonic flaw detection machine, etc.
| Product & Yield | Round Pipe | 140mm-325mm Thickness: 4.0mm-12.7mm |
| Square & Rectangle Tube | 90mm×90mm -250mm×250mm Thickness: 4.0mm-12.0mm |
| Length | 6m-12m Length Tolerance: ±3mm |
| Production Speed | 40 m/min |
| Production Capacity | 55,000ton/year |
| Consumption | Mill installed Capacity | 430 kw |
| Line Area | 130m(length) ×11m (width) |
| Worker | 6-8 workers |
| Raw Material | Material | Carbon Steel Coil Q235B(ASTM GR·D,σs 230) |
| Width | 440mm-1025mm Thickness: 4.0mm-12.7mm |
| Coil ID | 610-700mm |
| Coil OD | Max 2000mm |
| Coil Weight | 15.0t |
Forming process | Round pipe | Cold roll forming process | Good roller design |
| ZTF forming process | Save alt least 60% roller cost with electric control adjustment Read More |
| Square & rectangular tube | General round-to-square process | Stable forming process |
| Round-to-square with Turks head | Good pipe quality |
| Process of directly square-to-square(DSS) | One set of roller can produce all tubes with electric control and automatic adjustment Read More |
Equipment advantages： When producing round pipe, it can utilize ZTF forming technique When producing square & rectangular tube, it can utilize directly square-square (DSS) technique Products: architectural structure pipes, API pipes, tower footing tubes, automobile beam steel pipe and other products. High frequency welded pipe production line is mainly used for continuous production of straight seam welded pipe. It adopts high-frequency induction welding, which can not only produce round pipe but also corresponding square pipe and special-shaped pipes. The high-frequency pipe welding machine is mainly used for the production of various iron pipes, construction pipes, structural pipes, water pipes, oil pipes, API Pipes, and so on. Technical flow Scrolling up→ Uncoiling → Shear and Welding→ Spiral accumulator→ Forming → H.F. induction welding→ External burr removing→ Cooling → Sizing→ Flying saw → Run out table →Inspecting→ Packing→ Warehouse
