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API 520 Correction Factor

Calculate API 520 correction factors (steam super heat factor, pressure correction factor and viscosity correction factor).

Use the Result Plot option, to plot the correction factors.

Reference : API 520 Sizing, Selection And Installation Of Pressure Relieving Devices (2014)

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CALCULATOR : API 520 Section 5.7 Steam Super Heat Factor [FREE]   ±

Calculate check values for the steam super heat factor Ksh from temperature and pressure (API 520 Section 5.7 Table 9).

The super heat factor is interpolated from table 9. The table values are for guage pressure. Absolute pressure is converted to guage pressure for the calculation.

Tool Input

  • Po : Fluid Pressure
  • To : Fluid Temperature

Tool Output

  • Ksh : Steam Super Heat Factor
CALCULATOR : API 520 Section 5.3 Pressure Correction Factor [FREE]   ±

Calculate check values for the back pressure and over pressure correction factors (API 520). Use the Result Plot option to display the selected factor.

Tool Input

  • kfactype : Pressure Correction Factor Type
  • P/P : Pressure Ratio

Tool Output

  • K : Pressure Correction Factor
CALCULATOR : API 520 Section 5.8 Viscosity Correction Factor [FREE]   ±

Calculate check values for the liquid viscosity correction factor Kv (API 520 Section 5.8). Use the Result Plot option to display the factor.

Tool Input

  • schdtype : Pipe Schedule Type
  • diamtype : Pipe Diameter Type
    • ODu : User Defined Outside Diameter
    • IDu : User Defined Inside Diameter
  • wtntype : Wall Thickness Type
    • tnu : User Defined Wall Thickness
  • visctype : Viscosity Type
    • μu : User Defined Dynamic Viscosity
    • νu : User Defined Kinematic Viscosity
  • voltype : Fluid Flow Rate Type
    • Qu : User Defined Volume Flow Rate
    • Mu : User Defined Mass Flow Rate
    • Vu : User Defined Fluid Velocity
    • Reu : User Defined Reynolds Number
  • ρ : Fluid Density

Tool Output

  • μ : Dynamic Viscosity
  • ID : Inside Diameter
  • Kv : Viscosity Correction Factor
  • M : Mass Flowrate
  • Q : Volume Flowrate
  • Re : Reynolds Number
  • V : Fluid Velocity
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