ترددات عيوب المحامل
BPFO, BPFI, BSF and FTF from bearing geometry and shaft speed, with the harmonics and the minimum spectrum Fmax you need to see them.
المرافق والسلامة الإنشائية
تحجيم صمام التنفيس وفق API 520
Required orifice area for vapour or liquid relief, mapped onto the nearest API 526 standard orifice.
يجري تحميل الحساب…
جرى هذا الحساب داخل متصفحك. لم يُرسل أي رقم أدخلته إلى أي جهة، ولم يُحفظ شيء.
كيف تُحسب
- 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.
المعايير التي تتحدثها
أين تتوقف عن الصحة
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.
أدوات ذات صلة
معدل التآكل والعمر المتبقي
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.
المتانة المتبقية وفق 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.
سماكة جدار الأنبوب وأقصى ضغط تشغيل
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.