ERW325 Pipe Line with Automatic Stacker (Round Φ140-325mm, Square to 300×300mm) | Teneng, Shijiazhuang, China

The ERW325 is a high-frequency welded pipe production line that produces longitudinally welded pipe and cold-formed steel sections. It makes round pipe from Φ140mm to Φ325mm, square tube from 100 × 100mm to 300 × 300mm, and rectangular tube from 100 × 150mm to 200 × 400mm, all with wall thicknesses from 3.0mm to 12.0mm and a length tolerance of ±2mm.

Square and rectangular tube is formed directly, rather than by forming round and then squaring. Teneng says this gives a better section shape, with a smaller inner radius, straight edges, and a clean, neat appearance, and that multi-point bending removes axial force and lateral wear in forming, which lowers power loss and roll wear. Teneng also says combined rollers let one set of rolls produce dozens of square and rectangular sizes, cutting roller costs by 70%.

The line uses cold or hot-rolled coil made of low carbon steel up to X70 and welds with solid-state high-frequency welding. The listing is titled as including an automatic stacker for handling finished pipe.

Why Choose the ERW325?

It covers a wide middle range: round pipe and large square and rectangular tube from one line, in steel grades up to X70, with thin to heavy walls.

• Round and square/rectangular. One line produces both.
• Direct square forming. A cleaner section with a smaller inner radius.
• High-strength steel. Coil up to X70.
• Fewer roll sets. Combined rollers reduce roller inventory and changeovers.
• Stated warranty and delivery. Two-year warranty, about six months' delivery.

Machine Specifications

• Round tube: Φ140mm to Φ325mm
• Round tube wall thickness: 3.0mm to 12.0mm
• Square tube: 100 × 100mm to 300 × 300mm
• Rectangular tube: 100 × 150mm to 200 × 400mm
• Square and rectangular wall thickness: 3.0mm to 12.0mm
• Length tolerance: ±2.0mm
• Square and rectangular forming: direct forming
• Welding method: solid-state high-frequency welding
• Feeding direction: right or left side
• Coil material: low carbon steel, up to X70
• Main power: 132kW to 200kW
• High-frequency power: 300kW to 400kW
• Control: semi-automatic control system

Line layout

• Forming section: 13 horizontal roll stands (including 5 universal roll stands) and 3 vertical roll stands
• Welding section: guide roll stand, squeeze roll stand, external burr removal roll stand, and polishing roll stand
• Sizing section: 4 universal roll stands, 1 vertical roll stand, and 2 Turk's heads

Commercial details

• Brand: TENENG
• Machine colour: blue or green
• Payment methods: T/T, LC, DP
• Shipping port: Tianjin Port, China
• Terms: EXW, FOB, CIF
• Delivery time: about 6 months
• Warranty: 2 years, excluding spare parts and man-made damage

Condition Available: New

Key Features

• Round pipe to Φ325mm and square tube to 300 × 300mm on one line
• Direct square and rectangle forming
• Multi-point bending reduces axial force and roll wear
• Combined rollers, so one set makes dozens of square and rectangular sizes
• Solid-state high-frequency welding with external burr removal and polishing
• Double-housing horizontal roll stands with servo-adjusted upper roll height
• Modular design for easy assembly and replacement
• Automatic stacker (listed in the product title)

Applications

• Large round pipe and square and rectangular structural tube
• Longitudinally welded pipe and cold-formed steel for metallurgy, construction, transportation, machinery, and vehicles

Who This Machine Is For

• Structural pipe and tube manufacturers who want one line for round and large square sections
• Producers using higher-strength steel (up to X70)
• Manufacturers looking to cut roller inventory

Frequently Asked Questions

What sizes can it make?
Round pipe from Φ140mm to Φ325mm, square tube from 100 × 100mm to 300 × 300mm, and rectangular tube from 100 × 150mm to 200 × 400mm, with walls of 3.0 to 12.0mm.

What steel can it run?
Low carbon steel coil, up to X70.

How is square tube formed?
Directly, rather than from round, which Teneng says gives a smaller inner radius and straighter edges.

How is it different from the HGF250?
The ERW325 also makes round pipe (Φ140 to 325mm), goes down to 3mm walls, reaches larger square sizes (up to 300 × 300mm), and accepts coil up to X70. The HGF250 makes square and rectangular tube up to 250 × 250mm with 5 to 12mm walls, from coil up to Q355.

What is the warranty and delivery time?
Two years (excluding spare parts and man-made damage), with delivery of about six months.

Is financing or staged payment available?
Yes. A deposit secures your order and begins production, with the remaining balance due only once your machine has been built, inspected, and is ready to ship.

Should I buy new or used?
This line is available new, built to order.