Smart Simulation & Sizing Tools for Every Piping and Equipment Engineer/Designer

PASS/NOZZLE-FEM

Overview


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.

Powerful capabilities

The program Nozzle-FEM allows to take into account the thermal strains of materials in components that make up the vessel or apparatus. This allows us to take into account the expansion (deformation) of the materials in components under the temperature effects, as well as additional stresses arising from constrained temperature deformations (different linear expansion coefficients, different temperatures, etc).

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Integration

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

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

Materials database

The material database includes physical and mechanical properties of vessel elements materials according US, European, Chinese and Russian codes.

User Interface

The program has a modern, convenient, easy and friendly graphical user interface (GUI), which includes interactive user tips and user manuals in English and Russian languages.
PASS/Nozzle-FEM allows to create a several base design scheme by attachment element type:

The design scheme consists only of a base element.

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The design scheme consists of a base element and a nozzle.

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The design scheme simulates a elbow (bend) with support.

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The design scheme allows to simulate the convex head with a skirt support.

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PASS/Nozzle-FEM allows to model a variety shell elements, which greatly simplifies the design model creation:
Cylindrical shell:

Used for modeling of horizontal pressure vessel and etc.

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Used for modeling of vertical pressure vessel.

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Used for modeling of vertical storage tank.

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Used for modeling incutting to pipe (tee).

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Conical shell:

Used for modeling transition pressure segment with different diameters and etc.

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Provides additional capabilites to previous element.

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Used for modeling conical heads.

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Heads:

Convex head under pressure.

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Convex head under pressure.

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Convex head under pressure.

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Flat head under pressure.

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Used for modeling conical heads.

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Special shells:

Used for modeling bending of pipeline.

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Used for modeling incutting to rectangular plate.

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System Requirements

Windows 7/8/10+ 64bit
x86-64 architecture processor
Depends on Windows version (preferably from 8Gb)
Video card with OpenGL 2.0+ support and 1GB+ of RAM
Display resolution at least 800x640, recommended 1366х768

Codes


Allowable stresses for finite element method (FEM) analysis are defined by the following codes implemented in Nozzle-FEM:

  • ASME Boiler and Pressure Vessel Code. Part D. Properties. Section II, Materials - 2019.
  • ASME Boiler and Pressure Vessel Code. Rules for Construction of Pressure Vessels. Section VIII, Division 1 – 2019.
  • ASME Boiler and Pressure Vessel Code. Rules for Construction of Pressure Vessels. Section VIII, Division 2 – 2019.
  • EN 13445-3. European Standard. Unfired pressure vessels – Part 3. Issue 1 (2002-05).
  • JB 4732-1995-EN. Professional Standard of the People's Republic of China – 1995.
  • GOST 34233.1-2017. Vessels and apparatuses. Standards and methods of strength calculation. General requirements.
  • GOST 34233.6-2017. Vessels and apparatuses. Standards and methods of strength calculation. Strength calculation under low-cyclic loads.
  • GOST 34233.10-2017. Vessels and apparatuses. Standards and methods of strength calculation. Vessels and apparatuses operating in hydrogen sulphide environments.
  • PNAE G-7-002-86. Standards of strength calculation for equipment and pipelines of nuclear power plants. –M.: Energoatomizdat, 1989.

Besides finite element method calculation, the program supports CIF and flexibility calculation via semi-analytic methods according to WRC 537/107(297) (Welding Research Council Bulletins No. 107, No. 297 “Local stresses in spherical and cylindrical casings caused by the external loads”) and BS5500-76 (British standard).

PASS/Nozzle-FEM performs similar calculations (without FEM analysis) of vessel elements and nozzle junctions as per the following codes:

  • WRC-537 Welding Research Council. Bulletin. "Precision Equations and Enhanced diagrams for Local Stresses in Spherical and Cylindrical Shells due to External Loadings for implementation of WRC Bulletin 107". 2013.
  • GOST 34233.2-2017. Vessels and apparatuses. Standards and methods of strength calculation. Calculation of cylindrical and conical shells, dished and flat bottoms and covers.
  • GOST 34233.3-2017. Vessels and apparatuses. Standards and methods of strength calculation. Reinforcement of openings in shells and heads under internal and external pressure. Strength calculation of shells and heads under external static loads on the nozzle.

Configurations


PASS/NOZZLE-FEM can be delivered in different configurations:

PASS/NOZZLE-FEM

PASS/NOZZLE-FEM provides FEM analysis for nozzle and vessel connections.

PASS/EQUIP FEM Complete

PASS/EQUIP FEM Complete is a bundle that provides comprehensive design by rules and design by FEM analysis. Includes Vessel, Column, Exchanger, Tank & Nozzle analysis.

Download Software

SoftwareLinkUpload Date
PASS/NOZZLE-FEM 3.3.4 (Russian, English and Chinese) (64 bit)
request
29.07.2021
PASS/NOZZLE-FEM 3.3.4 (Russian, English and Chinese) (32 bit)
request
29.07.2021
Dongle Update (KeySt) zip, 4.12 MiB 30.07.2021
Dongle Drivers (SafeNet Sentinel 7.6.9) exe, 7.37 MiB 13.09.2017

Resources

Videos

Supporting Materials

PASS/NOZZLE-FEM. Overview_March 2020

PASS/NOZZLE-FEM. System Administrator Guide

Additional PASS/START-PROF Resources