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.
Instalaciones e integridad
Dimensionamiento de válvula de alivio (API 520)
Required orifice area for vapour or liquid relief, mapped onto the nearest API 526 standard orifice.
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Cómo se calcula
- Vapour, critical flow: A = W·√(TZ/M) / (C·Kd·P₁·Kb·Kc), with C = 520·√[k·(2/(k+1))^((k+1)/(k−1))].
- Liquid: A = Q·√(G/ΔP) / (38·Kd·Kw·Kc·Kv), the API 520 certified-valve form.
- Relieving pressure is set pressure × (1 + overpressure) + 14.7, in psia.
- The result is rounded up to the next API 526 designation, D through T.
Estándares que habla
Dónde deja de ser cierto
Sizing is downstream of the question that actually matters, which is the relief load. Fire case, blocked outlet, tube rupture, thermal expansion and control-valve failure each give a different required flow, and this tool takes whichever one you type as given — a valve sized perfectly for the wrong scenario protects nothing. The vapour equation also assumes critical flow and a conventional spring-loaded valve; balanced-bellows and pilot-operated valves have different back-pressure behaviour, and two-phase or flashing relief needs the API 520 Part I Appendix D method, which this does not implement.
Herramientas relacionadas
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.
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.