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Engineering Calculators
Compressor Calculators
Gas properties, flow conversion, compression thermodynamics, head, power, staging, cooling, surge, choke, similarity, nozzle checks, recycle and inventory calculations. Selectable units and separate calculation history are included.
Clickable compressor workflow
Centrifugal Compressor Design Flow
Follow the sequence from gas composition and operating cases through thermodynamics, sectioning, operating map, auxiliaries, driver selection and performance-test review. Each button opens the existing JavaScript calculator.
Design inputCalculationDecision gateFinal closeout
Engineering boundary: this flow is for preliminary engineering and vendor-document review. Final compressor selection requires the approved process simulation, vendor aerodynamic maps, API 617 requirements, ASME PTC 10 test methods, rotordynamic and mechanical analyses, project specifications and responsible-engineer approval.
Standards and engineering limitations
- API 617: equipment design, materials, rotordynamics, seals, auxiliaries, inspection, testing and supplier data for process centrifugal compressors.
- ASME PTC 10: thermodynamic performance-test procedures and conversion of measured performance to specified conditions.
- Ideal-gas and average-Z equations in this page are preliminary screening methods. Final selection requires an approved equation of state, vendor aerodynamic selection and certified performance maps.
- Surge and choke margins must use values at the same corrected speed and the vendor-defined margin convention.
- Anti-surge valve sizing, real-gas polytropic head, phase condensation, settle-out pressure and performance-test acceptance require project-approved methods and specialist review.
Important: Results are preliminary. Use absolute pressure and absolute temperature. Final compressor selection shall use approved process-simulation properties, vendor maps, API 617 requirements, ASME PTC 10 test methods and project specifications.