Relief valve sizing calculator will size valves based
on equations specified by American petroleum
institute. The equations allow engineers to size
relieve devices that can be used for different
industrial applications. The equations used are based
on API 520 7th Edition and API 521 4th Edition. A list
of main features are below;
1. Support SI and US Units of measurements, with the
ability to make input in different measurement units
for Volumetric flow rate, Mass Flow rate, Temperature,
Viscosity and Pressure.
2. Sizing conventional and pilot operated relief
valves for gas or vapour relief.
3. Sizing conventional and pilot operated relief
valves for liquid relief.
4. Sizing conventional and pilot operated relief
valves for saturated and superheated steam relief.
5. Sizing conventional and pilot operated relief
valves for vaporizing liquids (wetted vessels)
6. Evaluate multiple cases in one go.
7. Save and load your input.

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