HG89 HFW Tube Mill — Φ32–89 mm Round & Square Pipe Line

The HG89 tube mill is a Φ32–89 mm tube mill for round pipe with 1.0–4.0 mm wall and square pipe from 25×25 to 70×70 mm, welded by a 300 kW high-frequency welder.

Φ32 – Φ89 mmOutside diameter

1.0 – 4.0 mmWall thickness

300 kWHF welder

25×25 – 70×70 mmSquare section

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HG89 Tube Mill Specifications

• Outside diameter range: Φ32–89 mm.
• Wall thickness: 1.0–4.0 mm for round pipe; 1.0–3.5 mm for square pipe.
• Section shapes: round, square and rectangular.
• Forming: conventional roll forming.
• Welding: high-frequency induction, with a 300 kW welder.
• Automation: semi-automatic or full PLC.

Line speed and shift output depend on wall thickness, steel grade and cut length, so we confirm both at quotation once you send us your pipe size, material grade and cut length.

What a Tube Mill for 89mm Pipe Includes

As a tube mill for 89mm pipe, the HG89 line is built from the following units, from coil entry to finished pipe:

1. Coil car, carrying the coil from the loading position onto the uncoiler.
2. Uncoiler with a pneumatic four-link expanding mandrel.
3. Strip-head opener, guiding the coil head smoothly into the line.
4. Pinch leveller with five rollers, flattening the strip before forming.
5. Automatic shear-welder, joining strip end to strip end so the line keeps running between coils.
6. Spiral accumulator, storing strip while the next coil is prepared.
7. Forming and sizing mill.
8. 300 kW high-frequency welder.
9. Flying saw, cutting to length while pipe is delivered continuously.
10. Run-out table, carrying the finished pipe to the collecting table.
11. PLC and variable-frequency control tying speed and cut length together.

Wear Parts and Consumables

Saw blades wear with cutting volume, and impeders and induction coils wear with welding hours; both are wear parts we keep supplying. Forming and sizing rolls are replaced as they wear and are machined in-house, so replacements stay available.

Size Change, Roll Wear and Yield

On the Φ32–89 mm tube mill, a size change means changing the roll set. Roll material and heat treatment decide how long that set lasts before the diameter starts to drift; under-specified rolls show up as early wear, drift and repeated regrinding rather than as an immediate failure.

After a size change, PLC and variable-frequency drive control keep line speed and cut length repeatable from batch to batch, instead of leaving them to the operator.

On some of our higher-specification lines, material yield can reach 93 per cent; the yield actually achieved on any line also depends on the buyer’s scheduling and operating practice.

Where the Φ32–89 mm Tube Mill Sits in the Series

HG89 is the fourth of twelve models, starting at Φ32 mm, exactly where the HG32 ends. Its diameter range overlaps the HG76 (Φ25–76 mm) below it and the HG114 (Φ45–114 mm) and HG165 (Φ60–165 mm) above it. Wall thickness separates them: this line runs 1.0–4.0 mm, against 1.5–3.0 mm on the HG76, 1.5–5.0 mm on the HG114 and 3.0–7.0 mm on the HG165. In the overlaps, a Φ32–89 mm tube mill reaches thinner walls than all three and heavier walls than the HG76.

Where Our Lines Are Running

Our lines have gone to 25 countries — most make construction tube, and others run fire-extinguisher tube, furniture tube and other sections. In this size range: Egypt (HG89 × 5 and HG76 × 3), Sri Lanka (89 × 5) and India (76 × 3) for construction tube, and Malaysia (HG60 × 3) for furniture tube.

Delivery, installation and support

The line is dismantled into units and shipped in containers: heavy frames are braced and secured, while precision parts and wear items travel in wooden cases together with a spare-parts pack. Shipment is within 90 working days of the deposit.

Installation and commissioning are guided on site by our engineers, with online support behind them; the buyer provides the installation crew and covers the engineers’ travel, lodging and daily allowance. Our after-sales team handles enquiries.

Payment is staged — 30% by T/T on signing, 65% by T/T before shipment and 5% after installation and commissioning — or made by L/C at sight; prices are quoted ex-works (EXW).

Operating steps that need training

The steps that need operator training are coil loading and threading, shear-weld coil joining, size setting and roll changes, and weld parameter setting; cutting and collecting are routine.

What Decides Pipe Quality on the HG89 Tube Mill

Two factors most often explain a rejected batch: squeeze amount with seam alignment, which shows up as weld offset and burr, and sizing with straightening, which shows up as diameter out of tolerance, bend or ovality.

Post-weld cooling also has to be matched to welding speed, because it stabilises the seam structure; we specify the cooling medium and the plant sources it locally. Ultrasonic and eddy-current inspection belong to our API lines, not to this line.

What to send with an enquiry

Section shape and size, wall thickness, target output, and the standard the finished pipe is written against. Welder power comes with the size range: on the HG89 tube mill it is 300 kW.

Who Is Responsible for What

Weld fusion is on the equipment side — power matching, seam alignment and squeeze control — while strip quality and operating practice are on the buyer’s. Dimensional accuracy divides the same way: sizing and straightening on the equipment side, incoming strip thickness tolerance on the buyer’s.

What Pipe from This Line Is Used For

Most of the lines we have delivered at these sizes make construction tube: load-bearing building sections, scaffolding tube and general mechanical square and rectangular tube. What that buyer checks is squareness and straightness, edge line quality, changeover efficiency and unit energy.

The same line also makes pipe for municipal water and gas and for heating lines. There the buyer checks weld pass rate, diameter and wall coverage, non-stop coil change, and energy and yield.