Fluid Hydraulics, High-Pressure Fluid Power and Piping Containment
Calculators for pump head/power, parallel/series pumps, AODD pumps, hydraulic cylinders, control valve Cv, safety valves, ASME flanges and bolt torques.
Calculate centrifugal pump total dynamic head, pipe flow velocity, Darcy-Weisbach friction loss, hydraulic power, and motor rating. Inputs design flow rate, static elevation head, pipe length, inner diameter, roughness, fitting count, efficiency, and liquid density.
Calculate pump head and hydraulic shaft powerCompliant with Hydraulic Institute HI 9.6 guidelines and ISO 9906 centrifugal pump testing codes, enter single pump shut-off head H0 (m), rated head Hd (m), rated flow Qd (m³/h), system static head Hst (m), system resistance coefficient K, and single pump hydraulic efficiency (%). Select operation mode (two in parallel / three in parallel / two in series) to simultaneously solve system resistance parabolas and pump H-Q curves. Computes actual combined operating duty points (Q & H), percentage flow increase over single pump duty, combined hydraulic shaft power, and recommended motor ratings (kW), with alerts for parallel runout overload and series casing pressure limits.
Calculate parallel and series pump hydraulic operating pointCompliant with ANSI/HI 10.1-10.5 standards for pneumatic positive displacement pumps, enter process design flow rate (L/min), system discharge head gauge pressure (bar), suction installation configuration (flooded / dry suction lift 2.0m / high lift 4.0m), fluid dynamic viscosity (cP), and fluid specific gravity (SG). Select wetted diaphragm material to apply ANSI viscosity derating models, automatically calculating equivalent clean water flow, recommending standard AODD port sizes (0.5" to 3.0" / DN15 to DN80), calculating required drive air pressure (bar), standard free air consumption (Nm³/min & SCFM), and recommended air compressor motor power (kW).
Size air-operated diaphragm pump and air consumptionEnter flow rate and line type to find ideal inner diameter, match standard dash sizes, and evaluate velocity safety.
Calculate hose velocityCross-reference hose dash sizes (-02 to -32) with metric ID, fractional inches, and DN sizes; convert pressure (bar/psi/MPa) and evaluate flow velocity.
Convert hose dash sizes and unitsInput overall length (OAL) or cut length, fitting cut-off factors and dash size to calculate precise cut length, SAE J517 tolerances and pressurized expansion range.
Calculate hose cut lengthIdentify and match NPT, BSPP (G), BSPT (R), JIC 37°, ORFS and Metric DIN 2353 threads using caliper diameter and pitch/TPI readings.
Identify fitting threadCalculate double-acting single-rod hydraulic cylinder bore/rod effective areas, extension thrust, retraction pull, piston velocities, fluid volume and required hydraulic drive pump power using fluid mechanics.
Calculate hydraulic cylinder force and powerCompliant with ISO 5598 Fluid Power Systems standard and ASME Boiler & Pressure Vessel codes. Enter accumulator application duty (emergency power backup/fast stroke auxiliary/pump pulsation damping), required fluid discharge volume ΔV (L), discharge cycle time (s), minimum working pressure P1 (bar), maximum system pressure P2 (bar), and operating temperature (°C). Solves polytropic gas equations for rapid adiabatic expansion (n=1.4) and isothermal charging (n=1.0) to compute required gas volume V0, select standardized nominal shell sizes, calculate optimum nitrogen pre-charge pressure P0 corrected between operating temperature and 20°C ambient, and verify pressure ratios (P2/P0 ≤ 4:1) to prevent bladder failure while computing peak discharge flow.
Size hydraulic accumulator volume and precharge pressureApply Pascal's fluid laws and standard reference conditions (ANR: 20°C / 101.3 kPa). Inputs cylinder bore, rod, stroke, pressure and cycling rate to calculate usable extension thrust, retraction pull, cycle displacement and free air consumption in L/min and CFM with tubing and compressor sizing.
Calculate pneumatic cylinder thrust and air consumptionCalculates control valve Cv and Kv flow coefficients, selected rated Cv100, recommended nominal pipe size DN, operating travel opening percentage, and choked flow/cavitation risk per IEC 60534, ISA-75.01.01, and Fisher/Emerson standards for liquid, steam, and gas services.
Calculate control valve Cv and sizingCompute safety relief valve effective orifice area, API 526 nozzle letter (D through T), rated capacity, and flange sizes per ASME Section VIII Div 1, API 520 and API 526. Inputs relieving fluid medium, set pressure, overpressure, backpressure, required mass flow, temperature, and isentropic properties.
Calculate safety relief valve orifice and dischargeComprehensive international flange database across ASME B16.5 (Class 150/300), DIN EN 1092-1 (PN10/16/25/40) and JIS B2220 (10K/20K) from DN15 to DN300: instant lookup for flange OD, bolt circle PCD, hole count/diameter, stud bolts, torque and cross-standard incompatibility warnings.
Lookup flange dimensions and bolting specsCompliant with ASME PCC-1, ASME BPVC Section VIII Div 1 Appendix 2, and EN 1591-1 bolted joint engineering standards, select flange rating (ASME Class 150/300/600 or EN PN16/PN40), nominal size (DN50 to DN300 / NPS 2" to 12"), gasket style (spiral wound graphite, PTFE sheet, RTJ octagonal ring, kammprofile), stud bolt alloy (ASTM A193 B7/B8M, ISO 8.8/10.9), and lubrication condition (anti-seize moly grease, machine oil, or dry unlubricated). Enter design pressure (bar) to compute minimum seating load Wm2, operating load Wm1, target bolt preload (kN), tensile stress yield percentage (%), assembly torque (N·m & ft·lbs), and ASME PCC-1 4-pass cross-pattern tightening steps.
Calculate flange gasket seating stress and bolt torqueCalculates ASME Section VIII Div 1 Appendix 2 and PCC-1 gasket effective width b, operating and seating bolt loads (Wm1/Wm2), design governing tension, recommended torque, and gasket crush stress verification.
Calculate ASME flange gasket seating stress and bolt preload torqueFollow ASME Section VIII Div 1 Part UHX and TEMA 9th Edition to calculate tubesheet hole ligament efficiency, minimum net thickness governed by bending and shear stresses, and recommended nominal plate thickness.
Calculate ASME tubesheet bending and shear thickness and ligament efficiencyCompliant with CEMA and ISO 1807 bulk pneumatic conveying standards, enter rotor displacement per revolution (L/rev), volumetric filling efficiency (%), rotor rated speed (RPM), bulk density (t/m³), and differential pressure (bar). Select rotor pocket design (open pocket straight vane, closed pocket shrouded, or beveled pocket with flexible scraper tips) to compute actual volumetric throughput (m³/h), mass feed rate (t/h), air leakage rate (Nm³/min), bulk shearing torque, and drive shaft power (kW), recommending industrial gearmotor kW ratings with heavy-duty startup service factors.
Size rotary airlock valve capacity and motor powerFollowing Klinzing two-phase flow models and ISO 5048 standards, solve particulate saltation velocity, conveying air velocity, pipe DN size, system pressure drop, and Roots blower shaft power.
Calculate dilute phase pneumatic conveying air flow and pressure dropFollow API Spec 12J and GPSA standards to calculate horizontal three-phase separator Souders-Brown critical gas velocity, oil and water gravity settling retention times, vessel diameter, tangent-to-tangent length (L/D), and weir height.
Size three phase separator vessel diameter, length and retention timeSize single pump duty and motor kW using the Pump Head & Power tool, verify combined system curve intersections with the Parallel/Series Pump Calculator, and size shear-sensitive media with the Air Diaphragm Pump tool.
Look up standard dimensions via Flange Dimensions, verify gasket minimum seating and operating stresses with the Gasket Seating Stress Calculator, and derive target bolt torque using the ASME PCC-1 Flange Bolting tool.
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Already have an account? Open your workspace →When multiple pumps discharge into a shared header, the combined flow quadratically amplifies frictional pipe resistance, steepening system head. Operating points shift leftward along H-Q curves toward higher head and suppressed flow.
Optimal valve opening falls between 20% and 80% stroke. Operating under 10% stroke produces severe wire-drawing cavitation erosion and hunting instability across narrow throttle gaps; operating above 90% forfeits safety control margin.
Only 10% to 15% of tightening torque creates tensile clamping force; the remaining 85% is dissipated in thread and nut-face friction. Dry zinc bolts exhibit K=0.20 while anti-seize paste yields K=0.12. Neglecting K leads to over 50% preload error.
