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NOZZLE — FEM® – Analysis of stresses, flexibility and allowable loads of nozzle-shell junctions

The list of changes in various NOZZLE — FEM versions

The Version The List of Changes
  • The error has been fixed that occurred in some cases when the corrosive hydrogen sulphide medium was enabled;
  • The errors of program GUI have been fixed, in particular:
    when for the nozzle with beading it was necessary to set the weld seam parameters;
    if the TANK flag for a cylindrical shell was before enabled then the model of tee (main pipe) was not correctly created;
  • The error of central nozzle insertion on the elliptical head has been fixed, that occurs sometimes in exceptions of floating point operations;
  • The error of distribution package has been fixed where the installation language ID was not recorded, after which the program could not load resources correctly;
  • The report generation error has been fixed that occurred in the absence of all loads and that led to the program termination.
  • The error of stiffness calculation with the exclusion of beam stiffness has been fixed.
    This error could lead to mistakes of stiffness (from 10 to 25 percent) when the checkbox "Exclude the beam model" is enabled.
    This error had no influence on other calculation types.
  • The restriction of hydrostatic pressure setting for the heads has been removed. How can set the hydrostatic pressure for all models, but only along the vertical axis.
  • The misprints in the report templates have been fixed (in particular, calculation by WRC 107(297) the misprint GOST 34233.X 2007).
  • New: calculation of thermal strains has been added, which allowed to analyze additional stresses arising from constrained temperature strains or action of different temperatures in the components. For more information, see.
  • New shell type has been added - rectangle plate:
  • New: strength verification tests has been updated and revised for ASME BPVC.VIII.1-2017.
  • New: strength verification tests has been updated and revised for ASME BPVC.VIII.2-2017.
  • New: strength verification tests has been updated and revised for EN 13445-3:2014 (E) Issue 4 (2017-07).
  • Strength verification tests has been updated and revised for ÃÎÑÒ 342233.1-2017. In particular, a verification test has been added for materials that work at temperatures in the range where creep and stress rupture govern the selection of stresses.
  • Strength verification tests has been revised for ÃÎÑÒ 342233.6-2017.
  • Strength verification tests has been revised for ÃÎÑÒ 342233.10-2017.
  • Calculation method for "On the edge" and "In junction" has been significantly changed.
    For more information, see.
  • Calculation of elliptical heads with ratio H/D?0.25 has been allowed.
  • The fillet radius for nozzle with beading sets now the radius of the middle surface (that is, it is no longer recalculated).
    Verification of radius is now performed by condition: r ? 0.5min{s,s1}.
  • The bug of insertion of vertical nozzle has been fixed on the hemispherical head.
  • The materials properties was clarified for EN 10216-5 and EN 10217-7.
  • The geometrical and finite element models of nozzle junctions was clarified.
  • The error of conical shells parameterization with a large cone angle (large taper) is fixed.
  • The parameter check of weld-in toroidal insertion for tilted nozzle is improved.
  • The error of tank model creation with low type reinforcement is fixed.
  • The error of flat head model creation with the central radial nozzle is fixed.
  • The allowable load tables titles for calculations with low-cyclic loads is renamed by allowable load amplitudes.
  • The error of stiffness matrix invalid factorization at large mesh levels is fixed (error ¹803 in versions 2.14 and below).
  • The bugs of conical shell modeling with large offsets is fixed.
  • The bugs in GUI for the calculated schemes of the conical bottom and the reducer is fixed.
  • The misprints in the GUI when choosing the strength calculation under low-cycle loads is fixed.
  • The bug of creation of geometrical model of tilted nozzle with short length is fixed.
  • The bug of average radius calculation on flat heads is fixed.
  • The bug in the GUI is fixed when the digits after the comma were lost (for a some Windows regional settings).
  • The minimum allowable distance from the outer surface to the shell edge was reduced (condition was lighted).
    Now, instead of d/2, we use criterion min{d/2;vDs}.
  • The incorrect output of allowable stress values for austenitic steels is fixed (in the calculations the correct values is used).
  • The bug of mesh alignment in the extrapolation stress procedure is fixed when the nozzle welded zone ? 2*s1.
  • The inaccuracy of result nozzle thickness calculation with inner part is fixed (in strength calculation addition cs1 was only applied).
  • The visualization of the window zoom mode in the postprocessor is corrected;
  • The generation of the finite element framework in the postprocessor when changing display modes is corrected;
  • The formatting of reports for calculations under GOST 34233.2 2017 and GOST 34233.3 2017 is corrected;
  • The error of reports generation on non-European versions of Windows 10 when choosing Russian language is fixed;
  • The blocking of the solution stage during the nozzle length testing is fixed;
  • The verification of material properties at a given operating temperature is supplemented.
  • The error of running the solver when working with files located in a network folder is fixed;
  • The error of dongle access customizing is fixed;
  • The error of postprocessor running for some cases of regional floating point number representation is fixed;
  • The error of calculation running for newly created projects is fixed;
  • The system of requests to the user when saving and calculation running is modified;
  • Bugs of handling related GUI elements is fixed;
  • The presentation of calculation results is fixed;
  • The error of creating edge elements on the nozzle short inner part is fixed;
  • The inaccuracy in the geometric model construction of elliptical heads on the areas of sharp curvature changes is fixed;
  • The inaccuracy in the geometric model construction of the conical transition and bottom with the left cylindrical insertion is fixed;
  • The inaccuracy in the parametric model of the conical shell with a "small" height is fixed.
  • The limiting temperature is introduced when corrosive medium is actived in accordance with GOST 34233.10-2017.
  • The calculation of allowable stresses for nozzle with pad was modified.
  • The critical error in the design model of conical reducer and head is fixed.
  • Flaws related to the materials database is fixed.
  • Flaws in the installation program associated with the installation of Microsoft Visual C++ 2015 Redistributable is fixed.
  • Edge artifacts on short fittings is fixed.
  • Flaws in creating a geometric model of an tee with equal run and branch parts is fixed.
  • The critical error in the stress extrapolation procedure on short fittings was fixed which caused the solution abort.
  • The text formatting in reports is corrected.
  • The incorrect output of allowable stresses for JB 4732-1995-EN is fixed.
  1. Version 2.15 is installed only on 64-bit versions of Windows.
  2. The finite-element solver was translated on a 64-bit architecture and this is allowed to escape from memory restrictions (1.5Gb) for 32-bit Windows versions.
  3. The calculation method of allowable loads was corrected and refined.
  4. The calculation method of stiffnesses and flexibily factors was corrected and refined.
  5. The calculation method of stress intensification factors (SIF) was corrected and refined.
  6. The procedure of stress extrapolation at the weld toe was added, which allows to more accurately estimate peak stresses, improve the convergence of stress values at different mesh quality levels.
  7. For conical shell was added the possibility of specifying the end offset (as for eccentrical reducers):
  8. Load of hydrostatic pressure load was add for cylindrical and conical shell:
  9. Nozzle type radiobuttons was replaced by nozzle type combobox:
  10. The new nozzle type "with weld-in toroidal insertion" was added:
  11. The new nozzle type with beading was added:
  12. The new nozzle type with beading and with welded segment was added:
  13. The regeneration possibility of the result report was added.
  14. The result report was changed for allowable loads, stiffnesses and stress intensification factors sections.
  15. The postprocessor possibilities was extended for color setting of background, element edges and etc:
  • Fixed error that occurs when using materials of EN 13445-3 when calculating to EN 13445-3;
  • Fixed some typos in the GUI.
  • Restrictions was removed on the use of alloys from non-ferrous metals;
  • The database of materials was extended.
  • The calculating method of material characteristics was refined;
  • The output of allowable stresses in the source data for some ASME-materials was fixed.
  • Fixed the error for inserting a nozzle into elliptical bottoms for a private subtask.
  • The algorithm for generating a finite element grid on elliptical bottoms is optimized;
  • Fixed errors translating into Chinese language.
  • Postprocessor module (3D interactive model) was developed. It helps to visualize the results of calculation.
  • Materials database was filled by mechanical properties of materials from GB 150.2-2011 (China).
  • Added strength calculation under low-cyclic loads as per i.7 GOST R 52857.6-2007 «Improved calculation to low-cycle strength».
  • Corrected safety factor for austenitic chrome-nickel steels as per GOST R 52857.1-2007.
  • Strength calculation of V apparatus group working in corrosive hydrogen sulphide environment (GOST R 52857.10-2007).
  • Fixed flat head description in report.
  • Weld seam mesh was refined and elements along nozzle were overridden.
  • Materials database working faster.
  • “Delta” was removed for nontransition nozzles with pads.
  • Wall’s angle calculation for conical shell added to program interface.
  • Tilted nozzle’s location was corrected.
  • User template report’s path is saved on exit.
  • Nozzle location limit for bottoms/heads are expanded;
  • Calculation of conical transitions and heads clarified due to refined mesh;
  • Chinese language is allowable for working;
  • Added calculation of the stress intensification factors;
  • Added calculation of the flexibility factors.
  • Fixed encoding bug in the Html report.
  • Stiffness calculation in junction for all model configurations;
  • Strength estimation as per ASME VIII div.1;
  • Strength analysis of conical transition and heads working in corrosive hydrogen sulphide environment (GOST R 52857.10-2007);
  • Added criterion for ASME VIII div.1,2: “Protection against local failure” (σ1+σ2+σ3<=4[σ]);
  • Materials database was filled by mechanical properties of materials from tables 1A, 1B (ASME II Part D (Metric)).
  • Strength analysis of conical transition and heads;
  • Strength estimation as per JB 4732-1995;
  • Materials database was added by mechanical properties of materials from JB 4732-1995, GB 713-2008 and TU 14-3Ð-55-2001 Standards.
  • Strength estimation as per ASME VIII Div. 2 2010 and EN 13445-3:2002 E;
  • Analysis of barrel nozzles;
  • Stiffness estimation in junction place, as well as on the edge of nozzle;
  • Materials database was added by mechanical properties of main materials from EN Standards;
  • Materials database was added by “Maximum allowable stresses” (table 5(A, B)) from ASME Sect. II, Part D for estimation by Sect.VIII, Div.2.
  • Fixed bug of saving update settings;
  • Materials database was added by mechanical properties from PNAE G-7-002-86, OST 26-01-858-94, STO 00220227-006-2010, GOST R 54522-2011.
  • New FE-model for estimation of strength and stiffness of nozzles connections into the vertical steel tank’s walls, including nozzles with tombstone shape reinforcing plate;
  • Analysis of trunnion connections;
  • Implementation of a new material database, which includes both Russian and ASME material properties;
  • Automatic software version update system is introduced.
  • Added converter for making RTF reports, using one of default templates;
  • Head's straight flange mesh became a fine structure.
  • Straight flange and cylindrical shell was added to head model.
  • Added standards for strength estimation: GOST R 52857.1-2007 and GOST R 52857.10-2007 (corrosive hydrogen sulphide environment);
  • Reduced minimal limit distance from nozzle’s wall to shell’s edge;
  • Number and longitudinal length of shell’s elements are optimized;
  • Loads to tilted branch can be applying as in the main pipe coordinate system and in the branch;
  • Added the ability to configure the number of stress contours (from 3 to 30).
  • Program was expanded by english language interface with switching on fly;
  • Added models of radial and tilted branch connections. Loads applying points are on the main pipe and on the branch;
  • Tables are free from pictures, what is good usable for MS Office;
  • Reduced minimal limit distance from nozzle’s wall to shell’s edge;
  • Deformed model picture in auto scale added to the report.
  • Added nozzle calculation, including allowable loads and stiffnesses, for both global and local coordinate system;
  • Realized calculations of junctions of both horizontal and vertical shells.
  • Improved user interface and fixed bug with wrong nozzle location in the conical shell.
  • Fixed some minor bugs in dongle working.
  • The first commercial version of the program, which replaced program “Nozzle”.

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