FlowStack™ / Hub 01 of 03

Process & Hydraulics Engineering Calculators

One hub from fluid properties to delivered head. Estimate vapour pressure and density, size lines and screen pressure drop, then check pump duty and NPSH margin – a connected workflow for chemical, process and pipeline engineers.

Properties Pipe Sizing Pump & NPSH Offline / Zero-install

Pump vs System Curve

// Category 01 – Process & thermodynamics

Fluid properties

Get the property basis right before any sizing – vapour pressure, density and hazard data that feed the hydraulic calculations downstream.

[ 01.1 ]

Advanced Process & Thermodynamic Suite

Vapour pressure, saturated-liquid density and hydraulic estimates from published correlations, packaged for fast process screening and datasheet checks.

AntoineRackettDarcy-WeisbachBeggs & Brill

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[ 01.2 ]

Solvent Property & Sizing Calculator

Physical-property estimation with density correction and NFPA 704 classification, plus a rule-based assistant for flammability and handling awareness.

Spencer-DannerNFPA 704Property DB

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// Category 02 – Fluid flow & hydraulics

Flow, sizing & pumping

Size pipework, predict pressure drop across single and two-phase regimes, then convert system resistance into pump head, power and NPSH margin.

[ 02.1 ]

Fluid Flow & Pipe Sizing Calculator

HydraFlow Pro covers single-phase, compressible-gas and two-phase pressure drop with fitting losses and a built-in standard pipe database.

Darcy-WeisbachWeymouth / AGABeggs & Brill3K / 2K

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[ 02.2 ]

Pump Sizing Calculator

Convert hydraulic duty into total head, hydraulic and shaft power, and check available against required NPSH to guard against cavitation.

Total HeadNPSH(a/r)PowerEfficiency

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// Engineering basis

Why engineers use FlowStack

ConnectedProperty outputs feed straight into the flow and pump calculations.

Standard methodsAntoine, Rackett, Darcy-Weisbach, Beggs and Brill, Weymouth and AGA.

OfflineSelf-contained tools that run in the browser with no install or sign-in.

Screening-gradeFast first-pass numbers to support and sanity-check detailed design.

// Common questions

Process & hydraulics FAQ

What can I size with the FlowStack hub?

The hub takes you from fluid properties through to pump selection: estimate vapour pressure and density, size pipework and predict pressure drop for single-phase, gas and two-phase flow, then determine pump head, power and NPSH margin. It suits feasibility studies, first-pass sizing and checking simulator output.

Which pressure-drop methods are included?

Single-phase flow uses Darcy-Weisbach with Moody-type friction factors, compressible gas lines use Weymouth, Panhandle and AGA forms, and two-phase pressure drop uses the Beggs and Brill correlation. Fitting losses are handled with 3K and 2K methods.

How is NPSH handled in the pump tool?

The pump calculator computes available NPSH from suction conditions and vapour pressure, then compares it against the required NPSH you enter so you can confirm an adequate cavitation margin before selecting a pump.

Are results suitable for final design?

They are screening-grade estimates built on published correlations. Use them for early sizing, feasibility and validation, and always confirm against your project design basis, vendor data and validated software before procurement or construction.

// Explore the toolkit

Other brand hubs

FlowStack – Process & Hydraulics 01 IntegriShield – Integrity & Safety 02 MechCore – Mechanical & Energy 03

Screening and educational use. FlowStack tools provide first-principles estimates to support engineering judgement and must be verified against applicable codes, standards and your project design basis before procurement, construction or operation.

FlowStack (Process & Hydraulics)