Velocidad de corrosión y vida remanente
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.
Instalaciones e integridad
Frecuencias de defecto de rodamientos
BPFO, BPFI, BSF and FTF from bearing geometry and shaft speed, with the harmonics and the minimum spectrum Fmax you need to see them.
Cargando el cálculo…
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Cómo se calcula
- BPFO = (n/2)(1 − (d/D)·cosφ)·f, BPFI = (n/2)(1 + (d/D)·cosφ)·f.
- BSF = (D/2d)(1 − ((d/D)·cosφ)²)·f and FTF = ½(1 − (d/D)·cosφ)·f, with f the shaft frequency.
- Frequencies are reported in Hz, CPM and orders of running speed, because the three conventions all appear on the same plant.
- Fmax is suggested as 3.5 × BPFI, the usual minimum for capturing the diagnostic harmonics.
Estándares que habla
Dónde deja de ser cierto
The equations assume pure rolling contact with no slip, and real bearings slip by one to two per cent under load — so a spectral peak a couple of per cent off a calculated frequency is a match, not a miss. The catalogue geometry here is generic: two bearings with the same bore number from different manufacturers can have different ball counts, and a wrong ball count moves BPFO by a whole order. Where the fault frequency matters, get the geometry from the manufacturer.
La capacidad que automatiza esto
- FA-01Monitoreo de Condición de Equipo RotativoListens to pumps, compressors and turbines continuously and identifies the specific defect — bearing, imbalance, misalignment, looseness — from the vibration signature.
- FA-02Mantenimiento Predictivo según ISO 14224Puts every piece of equipment into one reliability taxonomy so that failure rates mean the same thing across all fields, and maintenance is planned from them.
Herramientas relacionadas
Resistencia remanente B31G
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.
Espesor de pared y 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.
Caída de presión en tubería
Single-phase liquid by Darcy–Weisbach with a real Colebrook friction factor, and gas by Weymouth with both Panhandle equations alongside it.