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Fluid Flow CalculationFlow regimes Reynolds numberVelocity in pipesHydraulic diameterFriction factor Fanning and Moody friction factor Colebrook correlation Churchill correlation Churchill correlation calculation toolPressure drop in pipesEquivalent length key pipe components K coefficients fittings and valve - turbulent flow K coefficients fittings and valve - laminar flow Orifice calculations Valves typesValves characteristics Valves Cv and sizing for liquid and gasValves Cv and sizing for steam and superheated steamValves Cv and sizing for 2 phases flowValves Cv calculation toolValves Cv in laminar flowConversion valves Cv and Kv Pressure safety valves (gas flow)Pressure safety valves (gas low pressure / vacuum)Pressure safety valves (liquid flow) Hydrostatics Toricelli formula / time to empty tankPartially filled pipe Sonic velocity