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
Pipeline pressure drop
Single-phase liquid by Darcy–Weisbach with a real Colebrook friction factor, and gas by Weymouth with both Panhandle equations alongside it.
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How it is calculated
- Liquid: ΔP = f·(L/D)·ρv²/2 with f from an iterated Colebrook–White solution, plus the elevation head.
- Gas: Weymouth, Panhandle A and Panhandle B, each solved for the outlet pressure from the squared-pressure form, with z at the average line pressure.
- Standard conditions are 60 °F and 14.73 psia; length is converted to miles internally because that is what the gas equations are written in.
- The API RP 14E erosional velocity limit is reported for the gas case so the rate can be checked against it.
Where this stops being true
Single phase, isothermal, and — for gas — no elevation profile. Real gathering lines carry liquid, and a two-phase line with holdup in its low points can have several times this pressure drop, arriving in slugs the steady-state number cannot describe. The gas equations also assume fully turbulent flow and hide everything they do not model inside an efficiency factor, which is why three of them are shown: when Weymouth and Panhandle B disagree by twenty per cent, that disagreement is the honest uncertainty, not a reason to pick the convenient one.
The capability that automates this
- PR-14Gathering Network OptimizationOptimises the whole surface network together — chokes, routing and separator pressures — rather than one well at a time.
- 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.
Related tools
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.
B31G remaining strength of a corroded pipe
A metal-loss defect assessed by both original and modified B31G, giving the failure pressure, the safe operating pressure and the longest defect your MAOP can carry.
Pipe wall thickness & MAOP
Required wall thickness and maximum allowable operating pressure under B31.3, B31.4 or B31.8, with the class location, joint and temperature factors applied.