New in Version 7

New & Improved Microsoft Excel Integration

  • Improved keyword based method for importing model changes from an Excel Worksheet

    • Use the included template Worksheet to quickly and easily define model changes

    • Change multiple scenarios at once

    • For a detailed description see Importing From Excel

An Excel Sheet that shows the format used to import into AFT Fathom.

  • New feature for directly exporting specified Output data to new or existing Excel Workbooks.

    • Export only the data that is desired - no need to sort through unnecessary data

    • Specify exactly where the data will end up - insert data into a pre-formatted Workbook

    • Automatically export after a model run

    • Export data from multiple scenarios with a batch run

    • For a detailed description see Exporting To Excel

New Isometric Drawing Mode

  • New Isometric Pipe Drawing Mode

    • Show and Snap to an isometric grid on the Workspace

    • View models in an intuitive "3D" layout, and easily build from existing isometric drawings

A spray discharge model drawn in the isometric pipe drawing mode.

NIST REFPROP Fluid Database Now Included

  • Over 150 fluids from the National Institute of Standards and Technology (NIST) Reference Fluid Thermodynamic and Transport Properties Database (REFPROP) Version 10

    • Select a NIST REFPROP fluid directly in System Properties

    • Use accurate and complete fluid information in your models without the need to locate and enter fluid properties manually

New Pump Features and Improved Pump Window

The Pump Configuration section of the Pump Properties window with the new Positive Displacement and Pump As Turbine options.


  • Specify a centrifugal pump's Preferred Operating Region (POR) and Allowable Operating Region (AOR)

    • Quickly determine if a pump's behavior is acceptable

    • Automatically calculate a POR from ANSI/HI 9.6.3-2017 - Rotodynamic Pumps - Guideline For Operating Regions

    • For a detailed description see Pump Configuration > Configuration Data

  • Significant enhancements and clarity added to the Four Quadrant modeling capabilities of the pump

  • Added ability to model a pump trip for a VFD pump

  • See a full list of changes to the Pump Properties window here

New Multi-Condition Events

  • Create complex triggers for transient events

    • Only start a transient event when multiple conditions are met

    • Utilize logical conditions - AND, OR, and NOT - to capture the effects of complex control systems

    • For a detailed description see Multi-Condition Events

The Initiation of Transient options in a junction's transient tab. Single event is selected as the initiation of transient and the event type is multi-condition.

Visual Report Animation

  • Revived visual report animation feature from AFT Impulse 1

    • Use color animation to show absolute values or values relative to the steady state

    • Static color map option to show maximum/minimum values from the transient data

An animated visual report showing Pressure Stagnation within a three reservoir system.

New Features for Valves

  • General

    • Pre-defined curves available for valve Cv vs open percent

  • Check Valves

    • Check valve closing velocity can be estimated using dimensional data for deceleration vs. maximum velocity to close chart

    • Ability to enter manufacturer data for deceleration vs. maximum velocity to close

    • New inertial model for translating nozzle/plug check valves

A Deceleration vs Maximum Velocity to Close chart.

  • Control Valves

    • Control Valve setting for Always Control (Never Fail) can be set to a default to off

    • Added Control Valve transient option to fail open or closed from current Cv value

  • Valve

    • Standard valve junction has the option to create Cv vs time transient from open % vs Cv data

Improved Startup Window

New Integration with Common Piping Layout formats

  • Save modeling time by importing existing Piping Layouts from various neutral file types

Updated Standards

  • Output displays Applied Standards - standards that were used in calculation of model results

  • Relief Valve loss can be specified with Designation Size per API 526 - Flanged Steel Pressure Relief Valves

  • Updates to Standards

    • Updated to HI/ANSI 12.1-12.6-2016 Rotodynamic (Centrifugal) Slurry Pumps for Nomenclature, Definitions, Applications, and Operation for use in Slurry De-rating

    • Updated to HI/ANSI 9.6.7-2015 Rotodynamic Pumps - Guideline for Effects of Liquid Viscosity on Performance for use in Viscosity Corrections

    • Updated MIT Equation for Crude Oil to latest version specified in Pipeline Rules of Thumb for use as an additional pressure loss model

More Improvements

  • General

    • Many new default Pipe Materials

    • Intermediate pipe elevations can now be entered as Length Along Pipe

    • Increased the loading speed for large models

    • Applying Design Alerts now shows Design Alert Violations in transient Output tables, and all time steps that violate the Design Alert are highlighted

    • Time delay option added for air valves

    • Added Buried Pipe model for calculating pipe wavespeed

    • Reservoir junction now has a finite tank option

    • New Force Set types for exit differential forces

    • Forces are calculated during the run for improved output display and graphing speed

    • Option available to add more rows to entry tables

  • Workspace

  • Output

    • Design Alerts can be created directly from the Output by right-clicking on a result - immediately select the appropriate object and parameter.

    • Data can be sorted by clicking on column heading

    • Output reports in portuguese

  • Graph Results

  • Model Data

  • Visual Report

Related Topics

Overview of AFT Impulse

New in Version 9

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