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
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.
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Cómo se calcula
- B31.3 process piping: t = PD / (2(SEW + PY)), with Y the temperature coefficient.
- B31.4 liquid pipeline: t = PD / (2 × 0.72 × SMYS × E) — the design factor is fixed by the code.
- B31.8 gas pipeline: t = PD / (2 × SMYS × F × E × T), with F from the class location and T from the temperature derating table.
- Ordered thickness = (required + corrosion allowance) grossed up for mill tolerance, so the thinnest delivered wall still satisfies the design.
Estándares que habla
Dónde deja de ser cierto
This is the internal-pressure hoop stress calculation and nothing else. Real design also has to cover external pressure and collapse, bending and axial stress from soil movement, thermal expansion, vibration and fatigue, seismic loading, and — for anything sour — the materials requirements of NACE MR0175/ISO 15156, which frequently governs the grade selection outright. The temperature derating table here is abbreviated. A wall thickness from this tool is an input to a design, not a design.
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.
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.