Steel Tube Bundle Strapping Machine in Production: Top Pressing Head, Strap Arch and Seal Joint on Square Tube Bundles

Executive summary This clip shows our steel tube strapping machine running in production. A bundle of square steel tubes stops on the roller conveyor under a strap arch, a yellow pressing head comes down on top, and the strapping head bands the bundle with steel strap and a seal. The conveyor then moves the bundle to the next strap position. Our machine applies 5 to 7 straps per bundle with 7,000–18,000 N strap tension.

Table of Contents

What the clip shows

Step What you see
Infeed A stacked bundle of square steel tubes runs in on a blue roller conveyor
Pressing A yellow pressing head on a frame comes down on top of the bundle
Strapping The strap runs round the bundle through a white arch and the head tensions and seals it
Index The conveyor moves the bundle on and the head straps the next position
Result Close-ups show tight steel straps with a seal joint on each band

Why press the bundle before strapping

  • Tight stack. The pressing head closes gaps between tubes before the strap is tensioned.
  • Square shape. The bundle keeps its stacked profile for lifting and stacking.
  • Higher tension holds. Steel strap at high tension needs a firmly held bundle to bite into.
  • Automatic positions. The machine performs all straps at different positions depending on bundle length.

Strapping machine data

Our published data for the steel tube bundle strapping machine:

Item Published value
Strap Cold rolled low carbon steel, blued and waxed
Strap thickness 0.8 / 1.0 mm
Seal width 25 mm / 32 mm
Seal feed Magazine, about 180 seals
Straps per bundle 5 to 7
Strap tension 7,000–18,000 N
Feed and take-up speed 2–3 m/s
Hydraulic work pressure 80–90 bar
Joint Double seal notch

Each machine is customized, so the arch size and pressing stroke are matched to your bundle range.

Straps and strap length per bundle

Worked example (illustrative).

Item Value
Bundle (illustrative) 6,000 mm long, 300 × 300 mm section
Strap spacing (illustrative) about 1,000 mm, so 6 straps
Girth per strap, 4 × 300 1,200 mm
Strap per bundle, 6 × (1,200 + 100 mm joint) about 7.8 m

Six straps sit inside our 5 to 7 range; longer or shorter bundles change the count.

Selection checklist

  • Tube size, bundle section and bundle length.
  • Bundle weight.
  • Straps per bundle and their positions.
  • Strap thickness and seal width.
  • Bundles per hour.
  • Link to the bundling and stacking stations.

Safety

  • Keep clear of the pressing head and strap arch while the cycle runs.
  • Steel strap edges are sharp; wear gloves when handling strapped bundles.
  • Stop the line before clearing a strap jam.
  • For CE markets, the machine is designed to ISO 12100 and EN 415-10.

Engineering FAQ

Q: How many straps does the machine put on a bundle? A: 5 to 7 straps, at positions set by bundle length.

Q: What strap tension does it reach? A: 7,000–18,000 N on our published data.

Q: Which strap and seal sizes fit? A: Steel strap 0.8 or 1.0 mm thick, with 25 or 32 mm seals.

Q: Why press the bundle first? A: The pressing head closes gaps between tubes so the strap holds a tight, square bundle.

Q: How much strap does one bundle use? A: About 7.8 m for a 6 m bundle with 6 straps in the worked example.

Q: How are seals supplied? A: From a magazine holding about 180 seals.

Q: Which standards apply? A: For CE markets, ISO 12100 and EN 415-10.

Next step

We size a steel tube strapping machine in three steps:

  1. Submit your layout drawing with tube sizes, bundle section, length and bundles per hour, to info@fhopepack.com.
  2. Receive a proposal within 48 hours with the machine data and layout.
  3. Book a site survey so we confirm the conveyor interface.

Sources

Last reviewed: 2026-10-10

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