Flexibility and stress analysis of piping systems

Software dPIPE 5.29

dPIPE 5.29

1. Bug Fixes and Corrections:

  1. Fixed an inaccuracy that caused the warning “no data available for high‑temperature piping (delta)”.
  2. Fixed navigation in fatigue curve tables.
  3. Changed the default setting for the number of decimal places displayed in DDE tables.
  4. When processing miter’s parameters, some “errors” were reclassified as “warnings”.
  5. Fixed program behavior when using CODE = 'GOST-59115-A'.
  6. Corrected calculation of allowable stresses for category S1 in Normal Operation load case according to PNAE_HT.
  7. Clarified the procedure for evaluating load‑carrying capacity of spring and rod hangers when using the sup_lds.mdb database.
  8. Fixed display of “mini‑tables” on laptop screens.
  9. Fixed visualization of piping supports in the 3D view when scaling pipe diameters.
  10. For high‑temperature piping analyzed according to PNAE_T, added handling of cases where, for certain load cases, piping temperature is lower than the temperature defined for creep-rupture strength (SR).
  11. Restored the ability to delete references on OTT record from the consolidated table with valves.
  12. PCF2dP: added an additional directory scan pass to search for undefined attached pipes.
  13. During data translation from PCF to dp5, corrected output to the NOTE parameter for supports and valves: text exceeding 32 characters is truncated with a corresponding user warning (logged to the log file).
  14. PCF2dP: fixed Internal error: A\pcf_desc.for(548). The error occurred when DESCRIPTION and MATERIAL attributes were read from the MATERIALS section and:
    - either the key was defined in MAPPING=1 mode;
    - or different components had the same ITEM‑CODE. In this case, the translator uses attributes of the first ITEM‑CODE from the MATERIALS section and issues a warning in the LOG file:
    #line: ITEM‑CODE -> non‑unique code -> ignored.

2. New Features and Additions:

  1. Added “eccentric reducer” element to the program interface;
  2. Added hotkeys (CTRL‑ALT‑Z) to display “anchors” (fixed position of node’s coordinates) in the graphics window; the same key combination opens the node properties window from tables.
  3. Improved navigation in the support allowable load selection table (user‑defined column widths are remembered; automatic column width adjustment by double‑clicking the left mouse button).
  4. Added information about the governing reference load case (load combination) to support load evaluation result tables.
  5. Spring hangers/supports are added to the “Piping Support Load Evaluation” table in the listing of the input data.
  6. In the program website, technical documentation, and input/output listing, references to RD 10‑249‑98 “Rules for Strength Analysis of Stationary Boilers and Steam and Hot Water Pipelines” were supplemented with references to GOST standards:
    - GOST 33964‑2016 “Stationary Water‑Tube Boilers. Strength Analysis. Static Strength Analysis. Cyclic Strength Analysis. Brittle Fracture Resistance Analysis”;
    - GOST 33963‑2016 “Stationary Boilers. Seismic and Wind Load Analysis”.
    These GOST standards contain exact copies of the corresponding RD sections and, unlike RD, are listed in the Technical Regulation of the Customs Union “On Safety of Equipment Operating Under Excess Pressure” (TR CU 032/2013)
  7. Added data from the TITAN‑2 catalog “Standard Support Structure Elements for Pipelines of Dimensions Compliant with ISO 4200:1991, OST, STO, M 1001.8282.500.00, R1.7_1.4” (designation “TITAN‑2_R2_SPB_0”) to the pipeline support allowable load database (sup_lds.mdb).

dPIPE 5.29

1. Bug Fixes and Corrections:

  1. Fixed the encoding of file names containing Cyrillic characters when copying the file path to the clipboard (menu "File/Properties").
  2. Fixed an error causing the task to crash when accounting for temperature gradients between the operating mode and the $COLD mode.
  3. Corrected the reference cross-section at the start of the “reducer” element: reducers following elbows or standard tees now start with the connected pipe cross-section (command “xs”). A similar correction has been applied to reducers following standard tee joints.
  4. The node names between which the distance is measured have been returned to the "distance between nodes" information window.
  5. Fixed an error occurring during the optimization of a piping section containing a miter bend.
  6. Fixed an error occurring when modeling a three-way valve.
  7. Fixed the determination of allowable stresses for groups SGM3, SGM4 ("EN" Standards) in case of complex load combinations.
  8. Fixed a program crash when calculating models with “small bore pipes” (SBP) and in the presence of multiple sets of dynamic calculations.
  9. Added post-processing of load combinations for printing accelerations in summary tables of valves when assessing according to NP-068.
  10. Fixed an error occurring if a spring with id='13/Z2' according to MVN is present in the model.
  11. Fixed an error occurring if the SOLVE specification contains LC TYPE = 'MODAL', which is not used in either POST or DCASE
  12. The PIPE.DBS file has been updated for fittings manufactured according to OST24 AUSTENIT (CODE = PNAE):
    1) The TW parameter has been added for branch connections.
    2) The OVAL = 3.5 parameter has been added for forged elbows.
    3) The branch connection thicknesses for several branch connections have been updated.
  13. The situation when the diameter of the pipe connected to the body or branch pipe of the tee is greater than the corresponding value in the body/branch of the tee is converted from an error to a warning

2. New Features and Additions:

  1. Global node coordinates in the input data printout (*.out file) are now computed in double precision.
  2. Added a check for the presence of data for the DELTA parameter when performing calculations for high-temperature piping ("RD" and "PNAE-T" Codes).
  3. For calculations using the time history analysis method, adjustments have been made to the definition of the integration step (DEL) and the output step (DTOUT). The values of DEL and DTOUT are set as multiples of each other.
  4. The program now includes the capability to use "standard" miter bends (command PIPE, subcommand MITR) similar to bends. A parameter XM has been added for miter bends, allowing adjustment of the miter bend weight considering adjacent straight sections modeled as straight pipes. Appendix XIX with explanations on modeling miter bends in dPIPE has been added to the help file.
  5. Parameter XT has been added to the BEND command for adjusting the bend wall thickness.
  6. The BEND command now allows specifying the minimum bend wall thickness (SMIN) as a percentage of the "actual" pipe wall thickness.
  7. Handling has been added for situations that caused unnamed sections to appear in the model (this occurred when the “name” parameter was missing in a FROM command and was defined immediately afterward).
  8. The "distance between nodes", "angle measurement", and "quick information" dialog windows have been made non-modal.
  9. The functionality "show selected parts of the model" has been added to the F4 selection.
  10. Command CODE = 'PNAE' YEAR = 2022 has been replaced with CODE = 'GOST-59115-A' YEAR = '2021'.
  11. Materials for CODE = 'GOST-59115-A' have been added to the materials database 'mat.dbs'.
  12. Standard miter bends according to OST 34-10 have been added to the components database 'pipe.dbs'.
  13. Piping components (pipes, bends, miter bends, tees) for STO 95 111-2013 "Components and elements of nuclear power plant piping made of corrosion-resistant steel for pressures up to 2.2 MPa (22 kgf/cm²)" have been added to the components database 'pipe.dbs'.
  14. The preprocessor for importing piping calculation models from PCF files (PCF2DP) has been significantly revised. See the help file.

dPIPE Utils

3. Pressure Design of Piping Products (TCALC utility):

  1. Fixed the calculation of piping circular flat ends according to EN 13480-3 standards.
  2. Fixed the output of results in the report for bends (PNAE Standards) for cases where the component material is implicitly defined.
  3. Fixed the printing of allowable stresses in reports for bends and tees.
  4. The program version numbering and its installation procedure have been put in order.
  5. The window for the materials database has been reorganized.
  6. Databases with piping fittings are put in order.

4. Program for Calculating Response Spectra and Generating Accelerograms (CVSpec-TH):

  1. Added an algorithm for filtering "shelf" points when broadening spectrum peaks.
  2. Added and integrated a service for saving/restoring the state of axes for an open project. The service is used to save and restore axes when navigating through the "Accelerations/Velocities/Displacements" tabs. The service parameters are saved and restored in the project files.