Bearing defect frequencies
BPFO, BPFI, BSF and FTF from bearing geometry and shaft speed, with the harmonics and the minimum spectrum Fmax you need to see them.
Facilities & integrity
Corrosion rate & remaining life
Two thickness readings turned into a short-term and a long-term rate, a remaining life and the next inspection date API 510 and 570 would set.
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How it is calculated
- Short-term rate = (previous − current) / interval. Long-term rate = (nominal − current) / years in service.
- The governing rate is the larger of the two, as the codes require.
- Remaining life = (current − minimum required) / governing rate.
- Next inspection = half the remaining life, capped at ten years.
Standards it speaks
Where this stops being true
Two readings define a line, and corrosion is rarely a line. Under-deposit attack, MIC and CO₂ corrosion all accelerate once initiated, so a rate averaged over ten quiet years will under-predict a mechanism that started last year. The reading also has to be at the same condition monitoring location on the same grid point to mean anything — a 0.3 mm difference is inside the repeatability of a hand-held UT probe on a rough surface, which means a short interval can produce a rate that is entirely measurement noise.
The capability that automates this
- FA-04Corrosion & Pipeline IntegrityPredicts where a line is corroding fastest and how long it has left, so inspection and replacement go where the risk actually is.
- FA-05Risk-Based Inspection PlanningAllocates a fixed inspection budget to the equipment where failure would hurt most and is most likely, with the reasoning written down.
Related tools
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Pipeline pressure drop
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