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
Two- and three-phase separator sizing
Vessel diameter and length from Souders–Brown gas capacity and liquid retention time, with the constraint that actually governs made visible.
Loading the calculation…
This calculation ran in your browser. No value you entered was sent anywhere, and nothing was stored.
How it is calculated
- Souders–Brown: V_terminal = K·√((ρ_liquid − ρ_gas)/ρ_gas), the velocity above which droplets are re-entrained.
- Gas density comes from the PVT module at separator pressure and temperature, not from an assumed value.
- Liquid section volume = (oil rate × oil retention + water rate × water retention), converted to actual barrels at the vessel.
- The vessel is sized to satisfy whichever of the two constraints binds, and the length-to-diameter ratio is reported so an unreasonable geometry is obvious.
Standards it speaks
Where this stops being true
Souders–Brown is a droplet-settling criterion with everything it does not model — inlet device, mist extractor, foam, slugging, wave action on the interface — buried in a single K factor. Foaming crude routinely needs three to four times the nominal retention time, and there is no way to know that without a bottle test on the actual fluid. Nothing here addresses slug catching, level control response, sand handling or the emulsion band that governs a three-phase vessel in practice. This sizes a vessel for a steady flow; a real separator spends its life in transients.
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.