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PASS/HYDROSYSTEM Piping Hydraulic and Thermal Analysis

Nominal Size Selection, Heat Loss & Hydraulic Calculation of Pipeline Systems

The Hydrosystem software performs heat loss & pressure drop calculations as well as nominal size selection for pipeline networks, transporting compressible or incompressible single-phase fluids (gases or liquids), as well as two-phase gas-liquid mixtures. It is widely used in power, oil refining, petrochemical, gas, oil, chemical and other industries. Different parameters of the process piping, main lines, heating and gas-distributing systems and other pipe networks can be calculated using the program. Hydrosystem allows to calculate above ground and underground piping systems of any complexity (including networks with loops). The analysis results can be used for pumps, compressors, control and safety valve selection to ensure the reliability and efficiency of the piping systems

PASS/HYDROSYSTEM provides diameter selection, heat and hydraulic analysis of steady state and transient flow in piping systems of any complexity, including networks with loops. It also covers the most dangerous type of transitional flow related to liquid surge (water hammer).

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

  • PASS/HYDROSYSTEM Complete
  • PASS/HYDROSYSTEM Pressure&Heat
  • PASS/HYDROSYSTEM Pressure
  • 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

PASS/HYDROSYSTEM combines sophisticated calculation capabilities with ease-of-use to deliver fluid flow and heat transfer simulation and sizing of any piping network for any design stage by “regular” engineers and designers.

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.

Process and piping engineers of more than 600 companies now use the software every day.

New employees can begin performing piping hydraulic and thermal analysis in days.

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.

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.

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.

PASS/START-Prof Smart Pipe Stress Analysis and Optimal Sizing

The world’s first Pipe Stress Analysis Software

START Prof® evaluates the structural responses and stresses of the different-purpose piping systems at static and cyclic loadings and performs seismic analysis. The first edition of the START Prof Software has been introduced in 1969. Today START Prof ® is the most widely used pipe stress analysis software in Russia and CIS countries, where it has become a pipe flexibility and stress analysis de facto standard for process and power piping, gas and oil transmission, and district heating piping systems.

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
    • PASS/START-PROF Power
  • 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.

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.

Pipelines that can be analyzed include piping for: process and power, gas and oil transportation, district heating piping, hot water supply, and more. Stress, flexibility, stability, and fatigue strength analysis are performed for buried, above ground, vacuum, high pressure, high temperature, and cryogenic piping.

 

Pipelines with various types of restraints, fittings and expansion joints can be easily evaluated. PASS/START- PROF also offers automatic selection of constant and variable spring supports.

 

Quick and easy buried pipeline analysis lets the user simply specify soil type, and define the pipe depth to run the analysis. The user does not have to: specify restrained and unrestrained zones, calculate the virtual anchor length, nor run a soil modeler. PASS/START-PROF will automatically do what is required for the correct soil simulation.

 

PASS/START-PROF can analyze a wide range of materials used in pipelines including: steel, nonferrous materials, plastic pipes and fittings, orthotropic materials such as fiberglass, reinforced plastic, glass reinforced plastics, and glass reinforced epoxy.

Capabilities include:

  • Nonlinear analysis for gaps, friction, one-way restraints, rotating rods,
  • PUR insulation stress analysis
  • Analysis of pre-stressed long radius curved pipes
  • Optimal automatic hanger selection

PASS/START-PROF offers many functions that make piping model creation very quick including: group editing, quick loop addition, node point renumbering, and spring data application.

PASS/START-PROF can import piping models ready for analysis from AVEVA PDMS and E3D, Caesar II, and PCF formats. Data can also be exchanged within the PASS suite and with a large spectrum of general and special purpose CAD and CAE software tools.

PASS/START-PROF is an ideal component for integration into any piping design workflow.

The Smart Operation Mode Editor allows users to just draw the piping, add general snow, wind, ice, as well as seismic load information and run the analysis. All appropriate load values and load cases will be created automatically according to selected codes. Time consuming manual creation of load cases is no longer needed.

The Smart Warning Message Window warns about e.g., pipe lifting off, overloading of supports and springs, or excess of deformations of expansion joints. Important problems in the model will not be missed.

Smart interactive reports including: expansion joint report, spring support report, flanges leakage report, etc. are provided to make understanding of the analysis results quicker and easier.

Along with the analysis of piping systems of any complexity, PASS/START-PROF performs a wide spectrum of calculations “on the fly” thereby helping piping designers to make the right decisions.

PASS/START-PROF calculates pipe and fitting wall thicknesses, span lengths, as well as sizes of typical piping assemblies. It also checks flange leakage, pump and equipment loads, buried and above ground pipeline longitudinal stability, pipe wall stability under vacuum and other loads.

PASS/START-PROF can be  delivered in different configurations to evaluate the piping stresses, displacements, and support loads from thermal expansion, cold-spring, soil and support subsidence and other loads according to applicable standards and codes.

PASS/START-PROF Complete provides simulation and sizing for any piping network considering all applicable national codes.

PASS/START-PROF Power provides simulation and sizing for any piping networks based on applicable national codes for power generation piping as well as for central heating networks.

PASS/START-PROF Process provides simulation and sizing for piping networks based on applicable national codes for process plants as well as for gas and oil transportation systems.

PASS/EQUIP Quick and comprehensive pressure vessel stress analysis

Stress and Stability Analysis of Vessels and Apparatuses Software

The PASSAT program is designed for the calculation of stress and stability of vessels, apparatuses and their elements for the purpose of evaluating carrying ability in operating conditions, as well as during the assembling process and testing. The program is created for designing, revamping and testing of vessels and apparatuses, as well as for making check calculations of oil-refining, chemical, petrochemical, natural gas, petroleum and other related industries. The basic PASSAT module calculates stress and stability of horizontal and vertical vessels and apparatuses in accordance with Russian normative documents and ASME VIII Div. 1 code.

PASS/EQUIP provides comprehensive 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.

PASS/EQUIP offers five configurations to meet your specific needs for equipment design and analysis:

  • PASS/EQUIP Complete
  • PASS/EQUIP Vessel
  • PASS/EQUIP Vessel&Exchanger
  • PASS/EQUIP Tank
  • PASS/EQUIP Nozzle-FEM
  • 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.

PASS/EQUIP provides the ultimate in usability by “regular” engineers allowing them to focus on the equipment design. The user defines the equipment type, geometrical adjectives, and material of the vessel components, type and allocation of supports, test type, and loading rates. Selection of vessel elements and materials is made from the vast databases which can be updated by the user.

3D graphic display of equipment geometry is provided with the possibility of editing the color of separate elements or the whole model, with views to make it possible to see internal elements.

Powerful 3D modeling opportunities also support export to various CAD formats, so the user could continue work on vessel design in his favorite CAD environment.

PASS/EQUIP does not require special training and can be used by any mechanical engineer. For nozzles, the creation of finite element mesh and estimation of calculation results are performed automatically.

PASS/EQUIP performs strength and stability calculation of horizontal, vertical, and column vessels, and takes into account wind and seismic loads. PASS/ EQUIP also calculates the strength and stability of shell and tube heat exchangers, including tubesheets, tubes, pass partitions, shells, expansion bellows, expansion boxes, and floating heads. The smart tube grid editor of heat exchanger provides very powerful opportunities of modeling non-standard tubesheets.

PASS/EQUIP provides analysis of nozzle-to-shell junctions using the Finite Element Method (FEM) including calculation of allowable nozzle loads and estimated nozzle junction strength for a wide range of geometric configurations and operating conditions. PASS/EQUIP nozzle analysis is recommended for the design and industrial safety review of oil and gas, refining, petrochemical, chemical, power and other industrial facilities.

PASS/EQUIP performs  stress  analysis for nozzles (including trunnions) of arbitrary geometry connected to cylindrical and conical shells, as well as elliptic, hemispherical and flat heads and performs nozzle-shell junction flexibility calculations. Nozzle and shell membrane stress, bending stress and total stress can be calculated.

PASS/EQUIP can be delivered in different configurations:

  • PASS/EQUIP Complete provides stress analysis for vessels, columns, heat exchangers, tanks, and nozzles.
  • PASS/EQUIP Tank provides stress analysis for vessels, tanks, and nozzles.
  • PASS/EQUIP Vessel&Exchanger provides stress analysis for vessels, heat exchangers, and nozzles.
  • PASS/EQUIP Vessel provides stress analysis for vessels and nozzles.
  • PASS/EQUIP Nozzle-FEM provides FEM analysis for nozzle and vessel connections.

PASS/EQUIP Nozzle-FEM

Analysis of stress state, calculation of flexibilities and allowable loads of nozzle junctions

PASS/EQUIP Nozzle-FEM is designed for stresses and flexibility calculation of nozzle-to-shell junctions using the Finite Element Method (FEM). The program also calculates nozzle’s allowable loads and estimates strength of the nozzle’s junctions for wide range of geometric configurations and operating conditions. PASS/EQUIP Nozzle-FEM helps to provide higher level of the equipment safety along with reducing labour costs at the design stage. The program is recommended for designing and industrial safety review of oil and gas, refining, petrochemical, chemical, power and other industrial facilities. Unlike the universal FEM programs (ANSYS, NASTRAN, COSMOS, etc.), this program does not require special training and can be used by any mechanical engineer.

PASS/Nozzle-FEM is designed for stresses and flexibility calculation of nozzle-to-shell junctions using the Finite Element Method (FEM). The program also calculates nozzle’s allowable loads and estimates strength of the nozzle’s junctions for wide range of geometric configurations and operating conditions. Nozzle-FEM helps to provide higher level of the equipment safety along with reducing labour costs at the design stage. The program is recommended for designing and industrial safety review of oil and gas, refining, petrochemical, chemical, power and other industrial facilities.

Unlike the universal FEM programs (ANSYS, NASTRAN, COSMOS, etc.), this program does not require special training and can be used by any mechanical engineer. Creation of finite element mesh and estimation of calculation results are performed automatically. FEM calculation, as opposed to semi-analytic methods (i.e. WRC 107/297, GOST 34233.3-2007, etc.), expands the program application range and increases analysis accuracy.

The program performs stress analysis for nozzles (including trunnions) of arbitrary geometry connected to cylindrical and conical shells, as well as elliptic, hemispherical and flat heads. Also one performs stress analysis of special cases: bend stanchion, support skirt, rectangular plate. It takes into account vessel boundary restraints and loads on the nozzle from the adjacent pipeline. Both nozzle and shell membrane, bending and total stresses can be calculated. Calculation of the pipe branch connections is also implemented, enabling detailed stress analysis of non-standard tees and pipelines branch connections.

Along with stress and stability analysis the program also performs nozzle-shell junction flexibility calculation, as this flexibility can considerably influence vessel and piping stresses. During stress analysis of pipeline systems nozzle-vessel junctions are often simulated by anchor supports which leads to overestimation of stresses and tensions. In order to automatically create the appropriate non-standard support in the calculation model, the nozzle-shell junction flexibility calculated by Nozzle-FEM can be passed into the PASS/START-PROF piping stress analysis program.

  • 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.

PASS/EQUIP provides the ultimate in usability by “regular” engineers allowing them to focus on the equipment design. The user defines the equipment type, geometrical adjectives, and material of the vessel components, type and allocation of supports, test type, and loading rates. Selection of vessel elements and materials is made from the vast databases which can be updated by the user.

3D graphic display of equipment geometry is provided with the possibility of editing the color of separate elements or the whole model, with views to make it possible to see internal elements.

Powerful 3D modeling opportunities also support export to various CAD formats, so the user could continue work on vessel design in his favorite CAD environment.

PASS/EQUIP does not require special training and can be used by any mechanical engineer. For nozzles, the creation of finite element mesh and estimation of calculation results are performed automatically.

 Allowable stresses calculation for operating and test modes in accordance with a given rule code (ASME, EN, JB, GOST, PNAE)

 Stress analysis of nozzle-to-shell junction from the action of external loads, pressure and thermal expansion

 Output to the report the calculation results and strength conclusions (HTML, RTF)

 Allowable loads calculation for nozzle\support and unconstrained shell ends

 Calculation of stiffnesses (flexibilities) set and flexibility factors

 Calculation of stress intensification factors (SIF)

 Calculation of nozzle with non-circle cross-section shapes

 Calculation of multiple user load cases

 Calculation taking into account thermal strains

 Calculation of models worked under hydrostatic pressure

 Calculation of bend stanchion

 Calculation of support skirt

 Calculation of nozzle junction into rectangular wall

 Calculation of strength and stiffness as per WRC 537/107(297)

 Calculation of hole reinforcement as per GOST 34233.3-2017

 Strength analysis under low-cyclic loads (GOST 34233.6-2017)

 Strength analysis in corrosive hydrogen sulphide medium (GOST 34233.10-2017)

PASS/Nozzle-FEM model can be created and transferred from PASS/EQUIP software.

The special module PASS/Nozzle-FEM has been developed for tie-ins (tees and fittings), calculation of shell-to-nozzle junction as per WRC and GOST, which is called directly from the PASS/START-PROF software. Also user can uses any Nozzle-FEM results in the piping system analysis by PASS/START-PROF in manual mode.