Compressible Flow Pipe Network Analysis

GASWorkS provides an extensive set of network modelling tools designed to assist the engineer design and analyse distribution, transmission, gathering and plant piping systems conveying natural gas or other compressible fluids.

The GASWorkS software is widely used in the natural gas reticulation industries for the design of industrial and domestic supply networks.

The program provides the engineer with a huge choice of friction loss correlations and allows the application of many standards and guidelines to the design of compressible pipe flow.



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  • User choice of gas equations.
  • Graphical Data Interface.
  • Modelling of regulators, compressors, valves, wells and other equipment.
  • The ability to display BMP or DXF images (for example road maps) as a background to the model schematic.
  • Excellent reporting facilities.

Equations of Flow, Standards and Guidelines

  • AGA 3 Orifice Metering Of Natural Gas and Other Hydrocarbon Fluids
  • AGA 8 Compressibility Factors of Natural Gas and Other Hydrocarbon Gases
  • AGA GPTC Guide for Gas Transmission and Distribution Piping Systems
  • AGA NX19 Manual for Determination of Super-compressibility Factors for Natural Gas
  • API 520 Sizing Selection and Installation of Pressure-Relieving Devices in Refineries
  • API 1102 Steel Pipelines Crossing Railroads and Highways
  • ASME B31.8 Gas Transmission And Distribution Piping Systems
  • GPA 2172 Calculation of Gross Heating Value (etc) for Natural Gas Mixtures from Compositional Analysis
  • GE/TD/3 Recommendations on Transmission and Distribution Practice
  • ICC International Mechanical Code
  • ISA S75.01 Flow Equations for Sizing Control Valves
  • ISO 5167 Measurement of fluid flows by means of pressure differential devices

Graphical Data Interface (GDI)

The Graphical Data Interface (GDI) provides map style graphical access to the model data. The GDI allows the inclusion of bitmap (BMP), Drawing Interchange File (DXF), or Shape (SHP) files as a reference background. Using the GDI, the User can draw the model schematic using point-and-click mouse entry, coordinate value entry, or relative distance and angle entry. The GDI provides pop-up data screens for editing and viewing of the various pipe, node and customer data and analysis results.

The GDI includes a wide variety of tools for modifying the pipe, node, and customer model features including routines for adding, deleting and moving features - and the ability to undo accidental changes and deletions. Three independent display panels support various zoom commands including the ability to zoom in by a User specified window, zoom by a User specified scale, and zoom to a previous view allow the User to easily move around the model image. A robust set of colour coding and tracing routines enhance the User’s ability to graphically review the analysis results and the system’s performance. The trace routines are complimented by the inclusion of what we refer to as “attribute” valves. The attribute valve feature was developed to assist in the design and layout of emergency isolation areas. A complete set of annotation routines allows the User to include notes and references in the model graphics.

The GDI tools are accessed through descriptive tool icons contained on function based “fly-out” tool bars, through a command line and list interface, and through a floating tool palette which can be arranged, sized, and placed to meet the User's preference.


The report routines provide spreadsheet style reporting of the model data, attribute data, and analysis results - including the ability to edit data directly from within the report by simply selecting the cell you wish to edit and making the desired change. The User may select the items to be included in the report by collapsing the columns associated with the unwanted items. The pipe report provides a comprehensive collection of information including reporting of both size/type and internal diameter values, reporting of pipe inlet, outlet and average pressures, flow rates, velocities and volumes, and simultaneous reporting of linear and pressure drop per User specified length. Selection sets may be created from within the standard reports, allowing unique reporting of User specified data groups. Hierarchical queries allow the creation of sub-sets from a previously created selection set.

Import & Export

GASWorkS includes an extensive set of import and export routines allowing data to be exchanged between a variety of applications. Support is provided for ASCII, DBF, Microsoft Access and Excel data files, third party model data files, Arc/Info shape (SHP) files, and a robust DXF translator allowing both import and export of graphical data. The DXF and SHP import routines allow the automated creation of a GASWorkS model from a CAD drawing or GIS data set. “Quick Export” outlines are provided to allow export of complete model data with a single click.


Support for GASWorkS is primarily provided by the developer. The annually renewable Maintenance, Update and Support (MUS) agreement ensures that your licence is always up-to-date and that timely assistance can be provided.