Use this hub to choose the maintained pipeline guide that matches the engineering question. The linked guides own their API examples, units, assumptions, validation evidence, and limitations; this page does not duplicate those details.

Choose a workflow

Engineering task	Start here	Scope
Build or compare steady pipeline equipment	Pipeline simulation guide	Equipment selection, geometry, pressure drop, elevation, and heat transfer
Run a complete calculation	Pipeline recipes	Maintained, test-backed Java examples
Select a model for an operating case	Model recommendations	Decision guidance and model boundaries
Review pressure-drop equations	Pipeline flow equations	Governing equations, friction, elevation, and units
Compare multiphase correlations	Multiphase-flow correlations	Beggs-Brill, Hagedorn-Brown, Mukherjee-Brill, and Gray routes
Study detailed transient multiphase flow	Multiphase transient model	TwoFluidPipe model structure, closures, and diagnostics
Configure transient numerics	Transient multiphase pipe	Sections, time integration, reporting, and engineering limits
Assess rapid pressure surges	Water-hammer implementation	WaterHammerPipe, method of characteristics, and surge boundaries
Model low-level heat and mass transfer	Fluid-mechanics documentation	Flow systems, regimes, interphase transport, and detailed profiles
Optimize connected lines and branches	Pipeline-network optimization	Network topology, hydraulic coupling, constraints, and optimization
Connect wells, templates, pipelines, and risers	SURF network integration	Production and injection system topology
Screen wall thickness and integrity	Pipeline mechanical design	Design-code workflows kept separate from hydraulic simulation

Model and documentation boundaries

Capability	Primary NeqSim route	Documentation boundary
Correlation-based steady hydraulics	PipeBeggsAndBrills and related pipeline equipment	Use the pipeline simulation guide and correlation guide
Detailed transient two-fluid hydraulics	TwoFluidPipe	Use the multiphase transient model; do not treat it as a drift-flux alias
Fast liquid-pressure transients	WaterHammerPipe	Use the water-hammer guide and its stated assumptions
Low-level non-equilibrium transport	TwoPhasePipeFlowSystem	Use the two-phase flow-system guide
Field and gathering topology	Network and SURF APIs	Use the network optimization and SURF integration guides
Mechanical capacity and integrity	Pipeline mechanical-design APIs	Use the mechanical-design guide; hydraulic results alone are not a design-code check

Supporting indexes

• Process-equipment documentation
• Fluid-mechanics index
• Wiki learning path
• Reference manual index

For API signatures, verify the linked guide against the current Java source and JavaDoc. For defects or missing coverage, use the NeqSim issue tracker.