Steel Pipe Bundling Line: Layering, Bundling and Strapping

Executive summary A steel pipe bundling line collects tubes from the mill, counts them into rows and stacks a tight bundle for strapping. Tubes run along the line, through a clamp, into a round bundle with straps. Our equivalent solution runs in automatic, semi-automatic or manual mode and stacks up to 5 bundles at the end.

Table of Contents

What the machine does, in order

The line has a long frame with rollers and geared motors, thin-walled steel tubes running along it, and a clamp head hung above the bundling station with air hoses feeding it.

  1. Feed. Rows of tubes run on parallel roller tracks in.
  2. Infeed. A row is pushed in under the clamp unit.
  3. Collect. Tubes gather on rollers into a round bundle under the hovering clamp.
  4. Position. The clamp traverses above the stacked tubes.
  5. Grip. The clamp lowers and grips a full row.
  6. Transfer. The clamp lifts and the row moves to the next station.
  7. Buffer. Long tubes lie on buffer rollers ahead of the strap ring.
  8. Press and strap. The arm presses down, lifts and presses again while the strap tightens.
  9. Outfeed. The arm rests high and strapped bundles convey forward.

Cycle time

Phase What happens Duration
Infeed A row is pushed in under the clamp about 14 s
Grip The clamp lowers and grips a row about 21 s
Transfer The row is lifted and moved on about 35 s
Press and strap The arm presses and the strap tightens about 49 s
Outfeed The strapped bundle conveys out about 84 s

These are phase times in the working sequence, not one full bundle cycle from infeed to strapped outfeed.

How the bundling line works

Tubes arrive one at a time from the run-out roller conveyor, and a rejection kicker sends faulty tubes to waste collection; good tubes pass to a storage area where a striker plate sets the end position.

A kick-out device moves the tubes one by one onto the layer forming chain while a photocell counts each kick; when the set count is reached the row is complete and the counter resets. Rectangular tubes are detected and turned through 90 degrees.

On our equivalent solution, an electromagnetic chuck lifts each complete row onto the bundle forming bed in place of the clamp head [manufacturer rating]. The forming device is adjusted to the bundle shape and fully contains its sides to hold the geometry until strapping is complete; hexagon bundle widths range from Min 450 mm to Max 1100 mm [manufacturer rating]. A bundle carriage then shifts the built bundle to the conveyor for strapping, an air blower dries it, and transverse out-loading feeds a chain stacker storing up to 5 finished bundles [manufacturer rating].

Station What it does
Run-out conveyor and kicker Brings tubes in and rejects faulty ones
Aligning and counting Sets the end position, turns rectangular tubes 90°, counts each tube
Electromagnetic row stacker Lifts each row onto the forming bed using an electromagnetic chuck
Adjustable forming device Holds bundle shape (Hexagon Min 450–Max 1100 mm) laterally until strapping
Strapping station Applies automated steel strapping
Outfeed and chain stacker Moves bundles out transversely, stores up to 5

Bundling line features

Feature Our equivalent solution
Line control Touch screen operator station, PLC
Working modes Automatic, semi-automatic and manual
Counting Photocell count at each kick
Rectangular tubes Detected and turned 90 degrees
Row stacking Electromagnetic chuck
Bundle shape Adjustable forming device (Hexagon width Min 450–Max 1100 mm [manufacturer rating])
Bundle storage at the end Chain stacking for 5 bundles

We size the tube range, the bundle size and the strapping to each mill, so the line is quoted per project.

Takt check

For an illustrative mill output of 12 bundles per hour, the takt is 3,600 ÷ 12 = 300 s per bundle [illustrative example], against about 49 s of press-down and strapping. Strapping is therefore not the limit at that rate, even with more than one strap per bundle, up to 6 straps at that time each — each extra strap adds its own time, so we check the strap count first. The real limit is counting and stacking enough rows, checked against the tubes per bundle and the mill speed.

Selection checklist for a pipe bundling line

  • Tube shapes: round, square or rectangular.
  • Tube diameter, wall thickness and length range.
  • Bundle shape and tubes per bundle.
  • Strapping by hand or fully automatic, and the strap count.
  • Mill output in tubes per minute, against the counting and stacking rate.
  • Space for the outfeed conveyor and a stacker for 5 bundles.

Controls and safety

Heavy tubes on rollers, the electromagnetic stacker and the clamp head all move without warning, so the layout keeps everyone outside their reach and the line is fenced, with gated access points.

Stop, isolate and lock out the station before anyone clears a tube, adjusts the forming device or changes a strap coil; use manual mode only for set-up with the area cleared.

Standards depend on the destination market: for CE markets, ISO 12100 sets the risk-assessment method and EN 415-10 fixes packaging-machine guarding and stop arrangements.

Engineering FAQ

Q: How does the line count the tubes in a row? A: A kick-out device moves the tubes one by one, and a photocell counts each kick until the set number is reached.

Q: Can the line handle rectangular tubes? A: Yes. Rectangular tubes are detected and turned through 90 degrees before layering.

Q: How many bundles can wait at the end of the line? A: The chain stacker holds 5 bundles before lift-away.

Next step

We size a steel pipe bundling line in three steps:

  1. Submit your layout drawing with the tube sizes, lengths, bundle shape and mill output, to info@fhopepack.com.
  2. Receive a proposal within 48 hours, with the station layout, the strapping plan and the cycle check.
  3. Book a site survey so we confirm the run-out conveyor, the floor space and the fenced zones.

Sources

Last reviewed: 2026-10-05

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