Process Skids, Modular Equipment & Packaged Plants worked example

Pipe Spool Count at 99% weld station uptime: a worked example

What does the result look like when weld station uptime reaches 99%? The full calculation is worked below with real intermediate numbers. Use it when pipe spool count in process skids, modular equipment and packaged plants is being asked to take on more work and you need to know if there is room.

The inputs for this scenario

  • Spools fabricated per weld station cycle: 4 units / cycle (unchanged)
  • Available weld station cycles: 480 cycles (unchanged)
  • Weld station uptime: 99 % (raised for this scenario; the documented default is 90)
  • First-pass spool yield: 97 % (unchanged)

Working through the calculation

  • Applying the documented formula (Gross pipe spool count capacity = units per cycle × available cycles) to the inputs above produces each figure below.
  • At this operating point the engine returns 1,844 units for good output capacity, the number this scenario is built around.
  • At this operating point the engine returns 1,920 units for gross capacity.
  • At this operating point the engine returns 19.2 units for uptime loss.
  • At this operating point the engine returns 57.02 units for yield loss.

How this compares with the baseline

  • Against the tool's baseline example, where weld station uptime sits at 90% and the headline result is 1,676 units, this scenario comes in 10% above the baseline at 1,844 units.
  • A figure at this level is achievable when weld station uptime is genuinely sustained, not just peaked for a shift. It assumes uptime and yield are independent averages; a systemic problem like bad WPS setup can hit both at once and make the two loss lines understate reality.

Results at a glance

  • Good output capacity: 1,844 units (headline result)
  • Gross capacity: 1,920 units
  • Uptime loss: 19.2 units
  • Yield loss: 57.02 units

Run it with your numbers

  • Every input above is editable in the live Pipe Spool Count calculator, which recalculates instantly and can be shared with the inputs intact.

Last reviewed 2026-05-12.