FlowStack by Aienginear: 13 free process and hydraulics calculators for line sizing, Darcy-Weisbach pressure drop, pump NPSH, control valves (IEC 60534) and ISO 5167 flow meters, with a quick line and NPSH checker.
Free Aienginear process engineering calculator suite: Antoine and IAPWS vapour pressure, Rackett density, Colebrook pressure drop, API RP 14E erosional velocity, ASME VIII-1 shell and head thickness, Beggs & Brill two-phase flow, DAK gas Z-factor and API 520 relief valve sizing, with printable tables and worked examples.
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