Tube, Pipe & Profile Forming worked example

Welded Tube Line Speed at 65% line efficiency and uptime: a worked example

Suppose line efficiency and uptime falls to 65%. This page works the full calculation at that level so you can see exactly which result moves and by how much. Welded Tube Line Speed converts the footage a tube mill produced and the hours it ran into an effective line speed, then discounts it by uptime so you see the real throughput rather than the nameplate figure.

The inputs for this scenario

  • Tube produced in the run: 1,200 units (held at the documented default)
  • Mill runtime: 8 hr (held at the documented default)
  • Line efficiency / uptime: 65 % (the input this scenario stresses; the baseline uses 90)

Working through the calculation

  • The calculation starts from the formula this tool documents: Raw welded tube line speed = completed output รท runtime.
  • Effective throughput works out to 97.5 ft / min at these inputs, and this is the headline figure for the scenario.
  • Raw throughput works out to 150 ft / min at these inputs.
  • Efficiency works out to 65 % at these inputs.
  • Runtime works out to 8 hr at these inputs.

How this compares with the baseline

  • Against the tool's baseline example, where line efficiency and uptime sits at 90% and the headline result is 135 ft / min, this scenario comes in 27.78% below the baseline at 97.5 ft / min.
  • It divides finished tube output by runtime to get a raw line speed, then multiplies by efficiency to give the effective speed the mill actually delivers. When the numbers land here, the stressed input is the lever to work; the walkthrough above shows exactly how much each output recovers as it climbs back toward the baseline.

Results at a glance

  • Effective throughput: 97.5 ft / min (headline result)
  • Raw throughput: 150 ft / min
  • Efficiency: 65 %
  • Runtime: 8 hr

Run it with your numbers

  • To rerun this with your own numbers, open the live Welded Tube Line Speed calculator, set line efficiency and uptime to your actual value, and adjust the remaining inputs to match your operation.

Last reviewed 2026-05-12.