A Practical Tool for Heat Treatment Simulation and Thermal Engineering Solutions

About DANTE Heat Treat Simulation Software

DANTE® is the State-of-the-Art in heat treatment simulation software, promoting improved component and process design in heat treatment. DANTE heat treatment simulation software is a coupled thermal, carbon diffusion, solid mechanics finite element based program for heat treatment simulation of steel parts. Engineers can use DANTE to predict the residual stress state in a given part after heat treatment, the evolution and final volume fractions of metallurgical phases, hardness, and part distortion. The DANTE analysis tool couples a multiphase material constitutive model directly with diffusive and martensitic phase transformation kinetics models. For use by metallurgists, process engineers, heat treaters and designers, the heat treatment simulation capabilities of DANTE include heating, carburization, immersion quenching, gas quenching, spray quenching, press or fixtured quenching, and tempering. Additionally, the system is interfaced to popular pre and post processors.

About DANTE Solutions

DANTE Solutions is an engineering consulting and software company, specializing in metallurgical process engineering and thermal/stress analyses of metal parts and components. Started in 1982 by founder Dr. B. Lynn Ferguson as Deformation Control Technology, the company has evolved into the premier thermal process modeling company with its DANTE heat treatment simulation software.

DANTE Solutions maintains an active program of alloy characterization, process modeling consulting, continued innovation in application to new processes (i.e. vacuum carburizing, high pressure gas quenching), and technical support to our software licensees.

Scanning Induction Hardening of Axle Shaft

The animation below shows the heat treatment simulation of an axle shaft using DANTE.

Part: 1 m long, 34.93 mm diameter axle shaft with a flange on one end and a 35-tooth spline on the other end.

Process: Inductor dwells at flange end for 9 seconds and then begins to move up the shaft at 12 mm/s for 1.5 seconds. The inductor slows to 8 mm/s and the spray begins at the flange. The inductor continues up the shaft, with the spray following, until the inductor is shut off as it nears the spline.

Considering Residual Stress in Loading Analysis

The animation shows contact gear stresses, with the residual stress predicted from a DANTE heat treatment simulation, considered during the analysis. Stresses from forming operations can also be used as a starting condition for the DANTE heat treatment simulation.

Low Pressure Carburization Modeling of High Alloy Steel

The animation shows the use of DANTE heat treatment simulation software in modeling a low pressure carburization process of a high alloy steel with strong carbide forming elements (e.g.; Cr, Mo, V). The animation shows the prediction for carbon in the austenite matrix (left), carbon in carbide form (middle), and a relative carbide size (right). There is a total of 34 boost/diffuse steps, plus a final diffuse to help dissolve the carbides and achieve the correct case depth.


Quick Pipe Stress Analysis and Optimal Sizing
  • PASS/START-PROF provides comprehensive stress, flexibility, stability, and fatigue strength analysis, with related sizing calculations, according to national and international codes and standards.
  • PASS/START-PROF offers three configurations to meet your specific needs for piping system design and analysis
    • PASS/START-PROF Complete
    • PASS/START-PROF Process
Key Features
  • Reliable software with a long history
  • Fast start for new employees
  • Integration with popular CAD & CAE tools
  • ‘On the fly’ calculations
  • Flexible licensing & affordable pricing
  • PASS/START-PROF provides comprehensive stress, flexibility, stability, and fatigue strength analysis with related sizing calculations for buried and above ground piping systems of any complexity according to international and national codes and standards.
  • First introduced in 1965, PASS/START-PROF combines a highly efficient solver, powerful analysis features, a user- friendly GUI, an intuitive 3D graphical pre/post-processor, and a detailed help system with embedded intelligence from generations of piping design experts.
  • PASS/START-PROF was created to be easy to use by “regular” designers without special knowledge in pipe stress analysis and/or detailed knowledge of standards.
  • While enabling “regular” designers, PASS/START-PROF is also an excellent tool for professional piping stress engineers. There are no obscure options, settings and questions. Just draw the piping system and run the analysis. Smart algorithms will do the rest of the job for you!
  • Enabling new users to perform piping/equipment analysis in days rather than months.
  • Process and piping engineers of more than 1,500 companies in many countries already use the software every day for stress analysis and design of different types of pipelines.


The Heat Treatment Simulation Software

Case Study 1: Distortion Analysis of Landing Gear

Immersion oil quenching process modeled for an AISI 300M landing gear, with the aim of reducing distortion while still satisfying the strength requirement.

Click on the Downloads below to view the Case Study Poster, shown above, and any relevant publications.


Key Features
  • Fast start for new employees
  • Comprehensive structural pressure vessels analysis
  • Integration with popular CAD tools
  • Flexible licensing & affordable pricing
  • PASS/EQUIP combines sophisticated calculation capabilities and code compliance with ease-of-use to deliver simulation of pressure vessels for strength and stability by “regular” engineers and designers.
  • PASS/EQUIP provides pressure vessel strength and stability analysis for horizontal and vertical vessels, columns, storage tanks, as well as shell, tube, and air cooled heat exchangers under static and seismic loads in order to evaluate bearing strength in operation, test, and assembly states. Applications include designing, revamping and testing of vessels, as well as making compliance calculations for power, oil-refining, chemical, petrochemical, natural gas, petroleum, and other related industries.
  • PASS/EQUIP also provides finite element analysis of arbitrary vessel nozzles for the purpose of estimating their stress, stiffness, and allowable loads. The results can be imported into PASS/START-PROF to be used for piping stress analysis.
  • New employees can begin performing pressure vessel analysis in days rather than months!
    •  Equipment process and piping designers and engineers of more than 300 EPC and vessel manufacturing companies now use the software every day for design of different types of vessels, columns, tanks, heat exchangers, and nozzles.
    • Detailed calculation reports produced by the program contain comprehensive information (including all equations, intermediate results, and plot of forces and moments) and are ready to be delivered to any authorities or equipment certification bodies.


Piping Networks Fluid Flow Analysis and Sizing
  • First introduced in 1977 and blessed by piping hydraulic world-known guru Idelchik, PASS/HYDROSYSTEM has since evolved into one of most powerful piping flow analysis tools.
  • PASS/HYDROSYSTEM provides diameter selection, heat and hydraulic analysis of steady state flow for real liquids, gases, and multiphase mixtures (including gas/liquid, oil/water, and gas/oil/water flow considering flashing and condensation), in piping systems of any complexity, including networks with loops

PASS/HYDROSYTEM offers three configurations to meet your specific needs for piping system design and analysis:


Key Features
  • Fast start for new employees
  • Extensive analysis capabilities
  • Integration with popular CAD tools
  • Calculation engine for all necessary fluid properties and phase equilibrium
  • Flexible licensing & affordable pricing

Broad Applicability

Pipelines analyzed include:
• Process piping systems at plants, storage facilities, pumping and compressor stations
• Plant utility piping systems such as steam, water, compressed air, inert gases, fuel, refrigerants and others
• Piping in mechanical industries such as aerospace, ship building, boiler, turbines, and more
• Oil and gas upstream and midstream pipelines
• Outdoor piping networks including district heating, water and gas distribution
• Other piping networks

  • PASS/HYDROSYSTEM includes flow assurance calculations, including severe slugging prediction and gas hydrate formation prediction.
  • PASS/HYDROSYSTEM simulates most complex types of multiphase flow, including gas-liquid flow and slurry flow.
  • PASS/HYDROSYSTEM  provides  flow rate calculation and sizing based on the most effective numerical algorithms for network analysis and optimization making it effective for analysis of large scale complex piping networks.

Increased Productivity

An easy to use GUI and multi-variant representation of the model with customizable level of detailing and type of graphics (process diagrams, one-line, 3D representation) allows effective use of PASS/HYDROSYSTEM on different design phases, from feasibility study to detailed design. Results representation on the pipeline model and automated and customizable report generation help the user to understand piping behavior.

Extensive analysis capabilities, along with integration with popular CAD tools and within the PASS suite, makes PASS/ HYDROSYSTEM an ideal component for any piping system design workflow.

PASS/HYDROSYSTEM can import piping models ready for analysis from AVEVA PDMS and E3D, PASS/START-PROF, and PCF formats, as well as export piping model to PASS/START-PROF. It can also calculate and export unbalanced forces from water hammer to PASS/START-PROF, CAESAR II and other piping stress analysis software.

Powerful Capabilities

In order to analyze a piping system for hydraulic and thermal effects, it is necessary to simulate its behavior on three scale levels: pipe cross section, pipe/branch run, and the whole piping network – and then link and solve these models together.

At the cross-sectional scale, it is necessary to define the type of fluid flow (laminar, turbulent, choked, or subsonic), flow pattern for multiphase flow (stratified, annular, intermitted, etc.), and the specifics of heat exchange between fluid and the environment through pipe wall and thermal insulation. This knowledge is then used when calculating integral parameters of the flow and heat exchange (pressure gradient, heat losses per length, etc.) and following up how all fluid parameters change along the pipe/ branch and all over the network. This would be impossible without access to the most reliable thermodynamic data provided by the software.

 PASS/HYDROSYSTEM provides a calculation engine for all necessary fluid properties and phase equilibrium on the basis of fluid composition, for a wide spectrum of fluids and applications.

Thermodynamics libraries used include: the advanced proprietary library for refining and petrochemical industry; the library on the base of the International Association of the Properties of Water and Steam formulation; the most accurate modern GERG-2008 library for natural gas; access to the Simulis Thermodynamics calculation server by ProSim SA (for chemical, biochemical and other industries); and PVTSim Hydrate Open Structure Library by Calsep.

PASS/HYDROSYSTEM uses the most advanced models/algorithms and libraries for all level of simulation (both proprietary and from famous researchers/developers from all over the world).

This includes minor losses correlations by Idelchik, Miller, and Ito; multiphase flow models by Chisholm, Friedel, Taitel, Barnea, and Tulsa University Fluid Flow Project research group; DHLLDV slurry flow model by Delft University of Technology; Todini Global Gradient Algorithm for network solver; Powell derivative-free method for optimization; and many others.

PASS/HYDROSYSTEM can be delivered in different configurations to evaluate the piping pressure and thermal effects.

PASS/HYDROSYSTEM Complete provides comprehensive hydraulic and thermal analysis and related sizing calculations for piping systems of any complexity.

PASS/HYDROSYSTEM Pressure&Heat provides simulation and sizing of any piping network for single phase steady state flow and thermal conditions.

PASS/HYDROSYSTEM Pressure provides simulation and sizing of any piping network for pressure effects related to single phase steady state flow conditions.

Affordable pricing options are tailored for the needs of all users, from individual engineers to corporations of all sizes.

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Try PASS Software

Now you can try the PASS software in full functionality for free. The trial period is 30 days.

PASS programs require a dongle installed locally or on a server. The trial mode is provided with access via Internet to the network dongle located on our server. To provide access to this dongle via Internet we need IP-address of your computer. Please register using your e-mail address, we will retrieve and store your current IP address and grant access. If your IP address changes later, you will be able to save a new one to be used. Each user can access one copy of each PASS program simultaneously.

Start a project with PASS Software Ask for Demo & Free Trial


The PASS software tools provide smart simulation and sizing tools for every piping and equipment engineer/designer that enable new users to perform piping/equipment analysis in days rather than months.

The PASS software tools combine embedded intelligence with powerful capabilities to make piping and equipment analysis practical for every engineer and designer while reducing the time, effort, and cost to perform the analysis. The result is smart simulation and sizing tools for every piping and equipment engineer/designer that enable new users to perform piping/equipment analysis in days rather than months.

Features and Advantages

  • Reliable software with a long history
  • PASS/START-PROF will save you time and money
  • User friendly interface
  • Context-sensitive help system and detailed user manual
  • Operation Mode Editor
  • The Smart Warning Message Window
  • Smart interactive reports
  • Working With Independent Piping Segments
  • Results can be analyzed using interactive 3D graphics where you can see deformed shape animation in different operating modes, such as stress color maps.
  • Units can be changed very quickly
  • Automatic on-the-fly checking of all pipes and fittings wall thickness for pressure load
  • PSRE proprietary method for solution of nonlinear model with friction converges in most cases
  • Equipment Nozzle Flexibility
  • PUR insulation stress check
  • Automatic spring hanger and support selection
  • Automatic constant load hanger and support selection
  • Translation and rotation Bourdon effect in pipes and bends
  • PASS/START-PROF nonlinear effects: friction in sliding, guide and spring supports, rotational rods and hangers, single-directional restraints
  • PASS/START-PROF consider specific behavior of long-radius pipe bends