

PASSAT
PROGRAM FOR STRENGTH AND STABILITY CALCULATION OF VESSELS AND APPARATUSES
The Version 
The List of Changes 
3.00.0.15 15.03.2019 
BASIC module:
 We clarified the calculation of the reverse flanges gasket parameters;
 Tubular supportslegs were not considered for stability under the test conditions. Fixed;
 Algorithm for calculating the load in the detachable covers was modified;
 We have fixed a problem with the calculation of allowable stresses for nickel alloys (in some cases there was a division by zero);
 We have fixed problem with displaying a blank page of problem components;
 6. We have fixed a number of typos and inaccuracies in the calculations of the heads as per ASME;
"PASSATHEAT EXCHANGERS" module:
 We have fixed a problem with the crash when creating a heat exchanger as per ASME;
"PASSATCOLUMNS" module:
 Calculation for wind resonance under testing was removed, under assembling it was added;
 We have specified an algorithm for calculation of critical wind speed in resonance conditions;

3.00.0.14 26.02.2019 
BASIC module:
 Fixed a problem due to which in some cases it was not possible to specify nozzle on a conical head in the polar coordinate system;
 The name of the parameter d_{0} in the nozzle is aligned with GOST;
 The parameter d_{0} in the nozzle at the external pressure was considered incorrect, fixed;
"PASSATHEAT EXCHANGERS" module:
 Graphical artifacts fixed when drawing some types of floating heads;
 Some typos fixed in the calculation of fixed tubesheets;
DB of materials and standard components:
 Database crash fixed when trying to select a combined flange (ring + weld neck).

3.00.0.13 06.02.2019 
BASIC module:
 GOST for wind loads was not included in the list of references. Fixed;
 In calculation per ASME div.II, the calculation of allowable stresses during testing was fixed (0.95·S_{y} or 0.8·S_{y});
 We have fixed an error of release 3.0.0.11 in determining of calculation thickness of the nozzles wall (double allowance);
 We have corrected misprints in calculation of detachable flat cover with holes;
 We have fixed a bug in creation of the table of cavities, connected with the helical coil;
"PASSATHEAT EXCHANGERS" module:
 In sheets, during automatic placement of tubes in cells of 60°, the angle was not maintained accurately. Fixed;
 We have improved an algorithm for creation of separating walls with a very large number of tubes (earlier it could lead to a program failure due to shortage of memory);
 We have fixed a problem with assigning of ACU tube bundles;
"PASSATCOLUMNS" module:
 We have specified an algorithm for calculation of critical wind speed in resonance conditions;
 In some cases, not maximum loads were transferred to the calculation of the support skirt and to the foundation. Fixed;
"PASSATSEISMIC (SEISMIKA)" module:
 In some cases, loads on vertical vessel supports in seismic conditions have been applied to the operating conditions. Fixed.

3.00.0.12 31.01.2019 
"PASSATHEAT EXCHANGERS" module:
 We have fixed a problem with assigning of ACU tube bundles.

3.00.0.11 24.01.2019 
BASIC module:
 An element Fixation generated for seismic conditions a message File not found". Fixed;
 We have added an allowance for external loads in detachable covers;
 In calculation results, the calculation thickness of nozzles is indicated without allowance, while the one is displayed in the table. Fixed;
 We have fixed a calculation of filling elements connected to the inside part of setthrough nozzle;
"PASSATSEISMIC (SEISMIKA)" module:
 We have fixed a problem concerning seismic calculation error in some models, that appeared in version 3.0.0.10;
"PASSATCOLUMNS" module:
 We have fixed a problem concerning application of wing loads placed below ground level (#IND in the report);
"PASSATHEAT EXCHANGERS" module:
 We have added a thickness check for tube sheet h_{p}c_{ps}c_{pp}>0.

3.00.0.10 31.12.2018 
BASIC module:
 Calculation of nozzles as per EN 134453 is added;
 Rendering of saddle support as per ASME is corrected;
 We have specified calculation of some parameters of the hole reinforcement as per ASME1 (UG37);
 We have added control of thickness for adjacent shell for flange, adjacent conical transition;
 We have added an output of rigid connection loads in any case, even if the rod is not calculated;
 We have corrected pictures of landing pads in the report;
"PASSATHEAT EXCHANGERS" module:
 Misprints in the dialogue of ACU tube bundle are now corrected;
"PASSATSEISMIC (SEISMIKA)" module:
 Seismic calculation of heat exchanger with empty tube section was performed incorrectly. Fixed.
Standard element and material database:
 In English version of standard element database, some Russian texts remained. Fixed.

3.00.0.9 17.12.2018 
BASIC module:
 We have fixed a bug, because of which some English PCs displayed a message Unable to save the file;
 For lining, option "Presents in assembling conditions has been added;
 We have debugged a calculation of shells as per ASME VIII2, taking into consideration all changes in version of 2017;
 We have specified an algorithm for calculation of nozzles according to ASME VIII1;
"PASSATCOLUMNS" module:
 In the skirt support dialog, we have added a cell with calculated distance from the head edge;
"PASSATHEAT EXCHANGERS" module:
 When calculation ACU split chamber, thickness s6 was taken with allowances c_{1}+c_{2}+c_{3}. Fixed.
 We have fixed a number of misprints in the reports for heat exchanger;
 We have changed limitation for thickness of separating wall of the shell and tube heat exchanger: now it can be more than groove width;
 We have deleted an excessive calculation of separating wall in test conditions;
 We have added an automatic calculation of test pressure, when calculating plugs;
Standard material database:
 We have fixed a problem with limit of longterm strength of user materials of bolts;

3.00.0.8 04.12.2018 
BASIC module:
 We have fixed a problem with displaying of some nozzles on the conical head;
 We have fixed problems with the dialog of welds of high pressure elements;
 We have added variants of connection of conical transition as per GOST 34233.2, fig. 29;
 Check as per i. 6.2.1.3, GOST 34233.3 has been added;
 Check of foundry radius for high pressure tieins is reworked;
 We have added buttons for selection of negative allowances for flat and conical heads, conical transitions;
 Now it is possible to specify material of skid board for saddle supports;
 We have eliminated a restriction on export of beaded tieins to NozzleFEM;
 With some combinations of data, «File not found message has been displayed. Fixed;
 We have fixed an insignificant error in calculation of B_{2} coefficient for conical transitions;
 We have reworked an allowance for the axial force in a strength criterion for cylindrical and conical shells;
 We have fixed a problem with Ujacket, which in some cases led to the loss of solution stability;
 We have fixed a number of errors and misprints in the calculation of elements as per ASME I, II;
 At calculation of allowable membrane, bending and total stresses for flanges, we have added an allowance for a possibility of creep;
 Gravity centres of flange fittings were defined incorrectly. Fixed.
 We have fixed misprints in RTF report (blanks were missed);
"PASSATCOLUMNS" module:
 We have fixed problems with rendering of nozzles on the supporting shell;
 Anchor bolt corrosion has been added;
"PASSATHEAT EXCHANGERS" module:
 For service platforms, we have added check G_{a} ≥ G_{s};
 We have fixed check of welds in tieins of the chambers;
 We have fixed errors in calculation of cutins into ACU cylindrical chambers;
Standard material database:
 We have added nonferrous alloy gradation (copper/aluminum);
 We have added an allowance for safety factor nT=1.3 for austenitic steels as per ASME;
 We have shared the tables of allowable stresses as per the Russian and foreign documents; now the stress table is used only when calculating based on the appropriate code. For foreign documents, major priority is given to a value from the table; for the Russian documents value obtained from the mechanical data;
 We have debugged a calculation of allowable stresses as per GOST table value is of a higher priority now;
 We have added materials as per RD26012886 (in test mode);

3.00.0.5 29.09.2018 
BASIC module:
 In some cases, a nozzle on the conical transition was drawn up incorrectly. Fixed;
 Landing pads in the model were set on the upper edge of the sheet, but they should have been set on the lower edge. Fixed;
 Calculation of saddle supports has been improved, taking into consideration the reactions from the fixation side;
 Calculation fail for vertical supports is fixed;
"PASSATHEAT EXCHANGERS" module:
 Separating wall of the heat exchanger was not considered in the bill of materials. Fixed;
 The tubes were removed from ACU (air cooling unit) test pressure calculation (the word "shellandtube" in GOST was recognized as incorrect);
 In the heat exchanger calculation as per ASME, a tube sheet diameter was taken wrongly in some cases. Fixed;
 We have added building of separating walls and allowance for them in the tube side, as well as allowance for tube and shell intersections;
 In some cases, tube and shellside pressures were equated. Fixed.
"PASSATTANKS" module:
 Selection of insulation in the tanks was inactive. Fixed;
 In the calculation of nozzle in the VST (vertical steel tank) wall, coefficient K1 was taken equal to 0. Fixed.

3.00.0.4 11.09.2018 
BASIC module:
 Allowance for friction in sliding supports is added to the calculation core;
 Calculation of saddle supports with allowance for friction have been debugged;
 We have fixed a program fault, when editing sprung structures in the rings of the saddle support;
 We have fixed a bug in generation of the report of the nozzle placed on the conical head;
 In some cases, after calculation, option "Lowcycle strength" might have disappeared. Fixed;
 When determining a category as per TR CU, the filled volume, not the total one, was taken. Fixed;
 We have added a separate determination of category as per TR CU, for vessel cavities, with creation of the table;
 Calculation of filling of Ushaped jacket has been fixed;
 When selecting standard heads in Ushaped jackets, the height and thickness of the head were not changed. Fixed;
 We have fixed a misprint during generation of RTFreport on the hole reinforcement calculation;
 We have fixed a misprint in the name of STO SA (ŃÒÎ ŃÀ) 030032010;
 We have fived an error in calculation of bends as per GOST 34233.22017;
 Insulation with specified weight generated a zero density in the report. Fixed;
 Checking the applicability of the nozzle calculation as per WRC537 interrupts the entire calculation/ Fixed;
 We have fixed formation of the nozzle on the detachable spherical cover;
 We have removed warning X_{h} for flanges as per ASME div.2;
 We have specified calculation of properties of the equal angle's crosssection;
 We have fixed a bug in the algorithm, due to which at temperatures above the limit of applicability, properties of materials essential for 20 degrees could be generated;
 We have fived a bug in the algorithm for calculation of heads as per ASME div.2;
"PASSATHEAT EXCHANGERS" module:
 We have added a button for selection of the negative allowances on the bottom of the floating head;
 In some cases, when opening the old file with Ushaped heat exchanger, the pipes were not properly rebuilt. Fixed;
"PASSATSEISMIC (SEISMIKA)" module:
 We have improved formation of tables and diagrams of loads;
 We have added building of loading diagrams for vertical vessels;
 We have added calculation of leg supports on the shell with allowance for seismic;
"PASSATTANKS" module:
 We have fixed a bug in calculation of the tank filling.

3.00.0.3 23.08.2018 
BASIC module:
 Flanges as per ÀÒÊ 261813for corrosive media have been added to the database;
 Materials of anchor bolts as per GOST R 10502013 are added;
 We have fixed formation of the flange plates with rearranged sealing surfaces of mortise and tenon type;
 We have corrected output of flange checkups (corrosion allowance have been added);
 With a certain combination of data, the thickness of the ellipsoidal transition was changed after calculation. Fixed;
"PASSATCOLUMNS" module:
 Calculation of the weld of skirts is brought into compliance with the new GOST edition (dimensions a1, a2 have been added);
 In estimating of the cone strength in combination with the support skirt, the diameter of the design crosssection was unsuccessfully chosen, which led to an excessively conservative estimate. Fixed;
 Material properties of the support skirt nozzles have been taken at the head temperature (it does not affect the calculation). Fixed;
 Brief reports now include pictures of loads on the nozzles;
"PASSATSEISMIC (SEISMIKA)" module:
 We have fixed the definition of horizontal axial reactions of the vessel on the saddle supports.

3.00.0.2 11.08.2018 
BASIC module:
 In some cases, the child elements were moved to the origin. Corrected;
 Redesigned pictures of external loads on the elements;
 Added output to the ratio report ? when calculating castings in a corrosive environment;
 For the tonguegroove type flange connection, the thickness of the plates were incorrectly transmitted to the report. Corrected;
 Fixed missing spaces in some parts of the report;
 The gradient color bar is removed in the design of the frame of the table of contents;
 Fixed a number of errors and inaccuracies in the determination of stresses in anchor bolts of vertical vessels supports;
"PASS/EQUIPCOLUMNS" module:
 In some cases, the calculation of wind loads generated an error. Corrected;
 Additional calculation of skirt supports are recognized as redundant and was deleted;
 Added check of weld strength according to i.8.7 GOST 34233.92017;
"PASS/EQUIPHEAT EXCHANGERS" module:
 Fixed creation of the heat exchangers cavities table;
"PASS/EQUIPSEISMIC" module:
 The definition of the conditional vessel parameters when calculating the seismic of the heat exchanger with partial filling is corrected;

3.00.0.1 03.08.2018 
BASIC module:
 Added consideration of the limit temperature corrosion activity GOST 34233.102017;
 Materials are added to the database: steel 09Ă2Ń KP 245 according to GOST 8479, steel 20 KP 175, KP 195, KP 215 according to GOST 8479, steel 10Ă2 KP 215 GOST 8479, KP 245 GOST 4543, KP 265 GOST 8731, KP 245 GOST 8733;
 Fixed construction of conical transition and bottom fillet;
 Fixed the placement of elements on the fittings of the coils;
 Added accounting notes 2 table. 1 GOST 34233.32017;
 Added ability to attach bosses to Ushaped and cylindrical shirts;
 Checks of the applicability conditions of the various sections of ASME VIII div have been modified.1 in the calculation of the holes reinforcement;
"PASS/EQUIPCOLUMNS" module:
 Modified calculation of the column shells and supports according to GOST 34233.92017;
"PASS/EQUIPHEAT EXCHANGERS" module:
 Fixed partition of the initial data in the Aircooling HE nozzles;
 Fixed the construction of the tube bundles, tilted at 45O;
"PASS/EQUIPTANKS" module:
 Fixed bug in check: vacuum should not exceed 0,5 kPa, not 5 kPa.

3.00.0.0 31.07.2018 
Main innovation:
 Implemented codes GOST 34233.12017
GOST 34233.122017, GOST 342832017:
 Changes and additions of the GOST 34233 are considered in comparison with GOST R 52857 1
12;
 Calculation of seismic and wind loads according to GOST 342832017 is implemented;
 Added calculation of bends from external loads according to GOST 34233.2;
 New items are added:
 Vessel assembly;
 Rigid link;
 Nozzle for the air cooler chamber (including junctions with the side walls of the welded chambers).
BASIC module:
 Added checking of the location of the nozzle on the torospherical bottom (i. 5.1.3 GOST 34233.32017).
 In the database of standard elements added OST 2601129881 (flanges made of titanium), BS EN 1002991 (tolerances for hotrolled sheets).
 Added the ability to place the nozzle on the conical bottom in the polar coordinate system.
 Added material search by Type/Grade.
 The table of calculation of filling is expanded: the summary column with total volume of a vessel and weight of a product is added, the calculation of volume and weight of a product on cavities is added.
 In the dialogue of the Ushaped shirt, added buttons for selecting the standard bottom, shell, negative tolerances.
 Adjusted the calculation of allowable stresses in the calculation of nozzles and connections for WRC537.
 When calculating the trunnions of the axles is eliminated verification of mutual influence, the arrow of the loads is made sensitive to the sign of the forces.
"PASS/EQUIPHEAT EXCHANGERS" module:
 Implemented the ability to set the Aircooled HE cameras independently.
 Added the ability to attach child elements to the nozzles of the cameras.
"PASS/EQUIPSEISMIC" module:
 Calculation of seismic loads according to GOST R 557222013 has been added.
 The algorithm of calculation of the conventional diameter of the equivalent vertical vessel is changed.

2.14.0.2 7.06.2018 
BASIC module:
 Unable to check thickness of welded beading, model building was not always correct. Fixed.
 We have fixed an error in data checking of the flat detachable cover by ASME.
 Design pressure of conical head is now available in the brief report.
 We have fixed problems, when placing the nozzle on a spherical detachable cover.
 We have fixed a bug, due to which an increment c was not considered in some formulas of flange stresses.
"PASSATHEAT EXCHANGERS" module:
 In floating heads there are no buttons "Dimensions as per GOST" for flanges and gaskets (English interface). Fixed.
 We have added output of pressure calculation of the bellows located on the expander.
"PASSATCOLUMNS" module:
 A misprint in calculation of supporting assembly (concrete compression stress concrete, factor 2 instead of 3). Fixed.
"PASSATTANKS" module:
 We have fixed a problem with generation of the tank brief report.

2.14.0.1 28.04.2018 
BASIC module:
 In calculation of stresses of an asymmetric flange with inverted contact surfaces, a bug has been fixed.
 We have corrected a misprint in lowcycle strength calculation of the flat cover.
 The English text was displayed in the header of the toroidal head calculation as per EN 13445. Fixed.
"PASSATCOLUMNS" module:
 Calculation of column in assembling conditions (when selecting calculation of the elements as per EN 13445 was not performed. Fixed.
"PASSATTANKS" module:
 We have fixed a failure, when selecting materials of RVS wall.

2.14.0.0 25.04.2018 
MAIN new features:
 For vertical and horizontal vessels, columns and tanks, a seismic calculation as per AzDTN 2.31 (Azerbaijan) has been added;
 We have adjusted selection of thermal insulation via calculation module of the "Insulation" program developed by NTP Truboprovod;
 Data on creep and longterm strength have been added to database.
 Calculation as per ASME VIIIII has been added for:
 Dished bottoms;
 Cylindrical shells;
 Conical transitions with fixing nodes.
 Now it is possible to connect rings to conical transitions;
 A new element Reverse flange has been added;
BASIC module:
 Database is now extended, the following codes have been implemented:
 SP 411032000 (thickness and density of thermal insulation);
 GOST 1925673, GOST 1925873 (grooves of bolt bodies);
 TR 5728006939782012008 meas.6 (gaskets PUTG), TR 728013939782012008 meas. 4 (gaskets PUTGm);
 GOST 2194576, GOST 2289786, GOST 2489081 (pipes made of titanium);
 Selection of climatological data for human settlements has been added;
 Materials as per EN 100881:2014 ... EN 100885: have been added;
 Material as per ST TsKBA (Central Design Bureau Standard, CDBA) 005.22004 have been added;
 When selecting nozzles as per OST 26201083, some of the shell standard sizes were missing; fixed.
 We have added test pressure calculation as per ASME VIIII UG99(b), UG99(b)36, UG99(c), UG100, PED 2014/68/EU[7.4];
 View of list of contents of the report is now improved, and an interactive tree is added now.
 Output of loads on the foundation of the horizontal vessel under seismic conditions has been added;
 We have added calculation of load from thermal deformations for highpressure flat covers as per RD 260116888;
 We have added output of information on properties of the vessel cavities (if several);
 We have added option "Editing thermal insulation list";
 Filling accuracy calculation parameter has been added;
 We have added to the report a notification, whether the loads were applied to the nozzle as the external ones;
 Formula for calculation width of gasket b0 in ASMEI and ASMEII varies slightly; now it is indicated in the report;
 Flange option "Flip surfaces" can change the plate thickness, but it was not considered in the calculation. Fixed.
"PASSATHEAT EXCHANGERS" module:
 We have fixed formation of the tube sheet clamped between flanges, when using 8faced sealing rings;
 When connecting a conical transition to the shell of a heat exchanger with Ushaped tubes, thickness of the adjacent element was calculated incorrectly; fixed.
"PASSATCOLUMNS" module:
 For service platform, we have added a new option, Absolute load from material (if platform weight is known);

2.13.0.8 19.03.2018 
BASIC module:
 For nozzles on dished heads, calculation of stresses in the tube as per WRC 297 is made incorrectly. Fixed.
 We have corrected the condition of applicability of GOST R 52857.3 (irrespective of presence of the ring, the distance to the tube shall be taken into consideration).
 We have fixed a program failure, when changing the model after creating of the report.
 We have fixed small errors in the calculation algorithm of the nozzle as per ASME VIII1 UG37.
"PASSATCOLUMNS" module:
 We have refined the calculation of the maximum moments from seismic loads for the column sections located below the support.

2.13.0.7 01.03.2018 
BASIC module:
 For setthrough nozzles, as per ASME at Lpr2=0, a check t> 0 is continued. Fixed.
 In the dialogs of the supports of vertical vessels, calculation diameter Dp was derived as the outside diameter of the shells. It is more correct to consider it as inside diameter; fixed.
"PASSATHEAT EXCHANGERS" module:
 In some cases, parameters of the tube and shell sides were equated. Fixed.

2.13.0.6 20.02.2018 
"PASSATTANKS" module:
 Item 7 of the previous update was found unsuccessful and has been cancelled;
 Snow loads on the tank have been brought into compliance with new edition of GOST R 20.133302016;
 In some cases, insulation on the roof was not displayed. Fixed.

2.13.0.5 08.02.2018 
BASIC module:
 In the English version of detachable elliptic cover, a button Flange as per codes does not work. Fixed.
 When selecting material according to GOST 5520, some materials not matching by thickness are displayed in the list. Fixed.
"PASSATHEAT EXCHANGERS" module:
 We have slightly improved the construction of cast covers of ACU.
 We have fixed a problem with temperatures at calculation of the temperature load Q_{t} for a tube sheet of Ushaped heat exchanger.
 Rarely, when saving the heat exchanger, the pressures were taken the same for the tube and shell sides. Fixed.
"PASSATTANKS" module:
 In some cases, when calculating the nozzle, hydrostatic pressure from filling was not considered. Fixed.
 When calculating as per GOST 313852016, calculation of minimum allowable wall thickness t_{pd} is changed.
 When calculating wall strength, weight of the roof thermal insulation is now considered.

2.13.0.1 14.11.2017 
BASIC module:
 We have fixed a model scaling to the screen size;
 We have added check of applicability of calculation procedure for landing pads (b3/Dp ratio);
 Calculation of saddle supports was not shown in the rtfreport. Fixed.
 We have fixed a problem with calculation of steep conical head (calculation of leaf node did not see" hydrostatic pressure component).
 We have fixed rounding of values in the filling calculation table.
 Under certain conditions, a hole for a nozzle in the flat cover could not be created; fixed.
"PASSATHEAT EXCHANGERS" module:
 We have fixed misprints in the Englishlanguage report of the floating head as per ASME.

2.13.0.0 30.10.2017 
MAIN new features:
 Calculation of the following shellandtube heat exchangers according to ASME VIII1, section UHX, has been added:
 With fixed tube sheets;
 With Ushaped tubes;
 With floating heads (type A, as per fig UHX14.1, submerged heads);
 With expansion joins (EJ calculation has been implemented according to ASME VIII1á MANDATORY APPENDIX 26);
 For vertical tanks, option "Calculation as per GOST 313852016 + STOSA03002200 has been added;
 For flange joints, option "Equal tightening" has been added, allowing a single (maximum) bolting load to be used for all flange operating conditions (assembly, operating conditions, testing);
BASIC module:
 For flange joins, option "Rearrange has been added for malefemale rearranging;
 Materials as per GB 150.2 (China), EN 10269 (bolts) have been added to standard material database;
 When selecting a bolt material, templates "Bar" and "Rod" are now available;
 Now it is possible to connect elements to the inside part of setthrough nozzles;
 Standard product base has been updated, and now it includes gaskets according to TR 5728006939782012008 (PUTG), TR 5728013939782012008 (PUTGm), OST 26.260.46199, GOST R 535612009, pipes and negative allowances as per EN 102161;
 Multithreading of geometric kernel has been implemented as a tunable parameter, which allows eliminating errors in the construction in some cases.
 In the dialog of selection of standard detachable covers, selection of pipe parameters has been added (similarly to the flange);
 For materials as per EN, feature "Casting control" for calculation of factor ??has been added;
 For heat insulation, option "Presents in assembling conditions has been added (now it can be switched off);
 Calculation of loads on the foundation for saddle supports has been added;
 For material 16GS at a temperature above 420 °C, a reduction factor hasnt been taken into consideration for the service life up to 2x105 h; fixed;
 We have fixed a problem with selection of casting materials as per ASME (for some materials, the database threw an error message);
 We have changed calculation of allowable stresses as follows: Earlier, the table [?] had priority over {Re/nT; Rm/nB }; now both options are considered, and the minimum result is selected;
 We have fixed an error concerning joint selection of detachable covers with flanges in accordance with new GOSTs.
"PASSATHEAT EXCHANGERS" module:
 Transitional shell is now implemented as option for all types of tube sheets;
 We have added a possibility to take into consideration the twosided coating of tube sheets;
 We have added a possibility to install the second expander (collector) in the heat exchanger with fixed tube sheets;
 For heat exchangers of air cooling unit (ACU), when making test pressure calculations, pipe materials are now taken into consideration;
 For heat exchangers of air cooling unit (ACU), coating of walls of welded chambers is now taken into consideration;
"PASSATCOLUMNS" module:
 For service platform, now it is possible to specify material and weight of steel structures;
 Now you can place a skirt support on the end of the shell.
"PASSATTANKS" module:
 Calculation of total load on the foundation (wall+head) has been added;
 Material of anchors ("bar chairs), for material intensity calculation, has been added;
 Insulation is now displayed on the wall and roof.

2.12.0.3 23.03.2017 
BASIC module:
 Hydrostatic pressure is not considered for some types of flat heads. Fixed.
 At calculation of some nozzle configurations as per ASME, File not found message has been displayed. Fixed.
 Loads on nozzle in automatic calculation mode have been always calculated in tiein points (in excess). Fixed.
 We have deleted redundant check of spherical head beading as per ASME, when there is no beading.
 We have considered Amendments No. 1 to RD 260114984 (calculations of jackets from longitudinal semipipes).
 Axial force sign has been considered wrongly at calculation of flange joint loads. Fixed.
"PASSATHEAT EXCHANGERS" module:
 We have fixed errors in delineation of some configurations of tube sheets.
 Check sp >= h for welded tube sheet is now removed.

2.10.0.1 25.01.2017 
BASIC module:
 We have introduced changes in database of standard saddle supports as per OST 26209193 (width of foundation plate and distance between the anchor bolts).
 We have fixed problems with data checking at joining of detachable covers to the conical transitions.
 We have fixed creation of ring support on the conical shell.
"PASSATHEAT EXCHANGERS" module:
 We have fixed problem with fixation of heat exchanger models, due to which in version 2.12 it was impossible to create loading diagrams.
 In dialog with tube sheet data, we fixed overlapped cells s_{p}, s_{pn}.
 At calculation of heat exchanger flange with Ushaped tubes and weldedin sheet, the pressure was taken as max{p_{ì}; p_{ò}}, but it should be taken as tube pressure. Fixed.
 For heat exchangers with fixed grids and air cooling unit (ACU), we have added an option Number of startstop cycles for calculation of tube welding.
 Misprint in calculation of ACU screw plugs is now corrected.
"PASSATSEISMIC (SEISMIKA)" module:
 Calculation of convective mass oscillation period is now fixed.

2.12 10.01.2017 
BASIC module:
 New elements were added:
 Jacket with longitudinal pipes, with calculation as per RD 260114984;
 Ring support of vertical vessel, with calculation as per Henry H.Bednar, "Pressure Vessel Design Handbook";
 Group of stiffening rings;
 Distributed external load.
 We have added calculation of number of the following elements with consideration for cladding layer, as per i. 8.8 GOST R 52857.1:
 Cylindrical shells;
 Conical transitions;
 Dished welded heads;
 Flat heads without ribs;
 Detachable covers;
 Cutins;
 Bends;
 Heat exchanger shells;
 Heat exchanger shells;
 Material consumption calculation table is now available.
 Creation of heat insulation in flanges and detachable covers has been added.
 Development of epures and diagrams has been improved.
 Updated interface now includes the following improvements:
 New button "Show heat insulation" has been added.
 We have developed new, stretching lists of elements for editing, deleting and transferring to Word;
 We have improved behaviour of the structure tree (when changing model, states of minimized branches are saved);
 O We have improved behaviour of lists of elements for editing (when updating the model, a cursor does not run to the first element);
 We have added a panel "Use of materials" with express assessment of material consumption and designation of colors of materials used in construction;
 We have added a button "Painting per materials", which includes a color mode with painting (filling), in accordance with panel "Use of materials.
 A new option switching off export of heat insulation, lining and fastening has been added.
 We have added two (2) variants of formula for stiffness parameters of the flanges with and without corrosion (selected by user).
 We have added an option Stiffening ring" at the less diameter of conical transition.
 Now ASME calculations include allowances c1, c2, c3.
 We have added a possibility of flanged olet placing on torispherical head.
 Database now includes new steels 20ȚŚ, 20ÊÀ, 09ĂŃÍÁÖ (20 JuCh, 20 KA, 09GSNBTs).
"PASSATHEAT EXCHANGERS" module:
 An interactive design of tube sheets is now available.
 All shell and tube heat exchangers with fixed sheets are combined in the single element, expansion joints and expanders are added as options.
 Additional check of stiffness of tube sheets is of advisory nature.
"PASSATCOLUMNS" module:
 We have added variant of supporting node with knee plates as per RTM 2611172.

2.11.0.5 25.11.2016 
BASIC module:
 A slow algorithm for spiral channel creation is now fixed.
 In some cases, weight of the jacket spiral channel was calculated incorrectly. Fixed.
 We have added checks for selfintersection of the spiral channel of jacket.
 We have fixed creation of stiffening ribs on the flat head, when the ribs are above the central weldolet.
 Doubling of flexibility formula of gasket within flange joints is now removed.
 We have added calculation of elliptic crosswalls, in case the sign "Presence of tests" is indicated at least on the one side (earlier the calculation was performed only if the sign was indicated on both sides).

2.11.0.4 25.11.2016 
"PASSATTanks" module:
 In calculation of the tank elements barycentre, there was a bug starting from version 2.11. Fixed.

2.11.0.3 23.11.2016 
BASIC Module:
 Model rebuilding algorithm has been improved (earlier in yellow and green modes there were different calculation results for elements masses).
 We have fixed bugs in calculation of nozzle according to ASME VIIII (allowance for corrosion as per UG16(b), thickness as per UG45).
 We have fixed a problem with opening some files of the previous version.
 We have unlocked calculation of austenitic steels in corrosion environment, by agreement with developers of GOST R 528572007.
 There was no option of calculation of the small end of conical transition as per ASME VIII1. Fixed.
 In calculation of conical transition as per ASME VIII1, a note UG32 (g) is now considered.
 At calculation of elements according to WRC 537 (107), calculation was interrupted, if breaking point of material at high temperature wasn't specified. Fixed (breaking point at 20 ?C is taken).
"PASSATCOLUMNS" module:
 Total allowance of the supporting ring wasnt used in calculation (total allowance of the supporting shell was taken instead of it). Fixed.

2.11.0.1 27.09.2016 
BASIC Module:
 Program failure, while attempting to select a flange from database in English mode, has been fixed.
 Misprints in symbols of nozzle welds (ï3) are corrected.
 In some cases, selection of negative allowance for plates wasnât available. Fixed.
 For material SA312 TP321 (welded pipe), allowable stresses were not taken from database. Fixed.
 At calculation of some types of flanged olets, the report included symbols ##, and an excess message about the unfound file was displayed. Fixed.
 Formulas in calculation of saddle support as per ASME were not displayed. Fixed.
"PASSATHEAT EXCHANGERS" module:
 For heat exchangers of air cooling unit (ACU), there was no automatic calculation of the number of tubes at the pitch change. Fixed.

2.11 20.09.2016 
BASIC Module:
 Calculation of elements as per ASME VIII is implemented:
 Cylindrical shells from external loads;
 Cylindrical shells at locations of saddle supports;
 Cylindrical, Ujackets, spiral and register channels.
 For calculation of shells in places of load application, WRC 537 (replacing WRC 107) is implemented.
 New elements were added:
 Supporting lugs on the shell and head (with calculation as per WRC 537);
 Areas of connection with load (with calculation as per WRC 537), with possibility of load transferring to the supports;
 Fixing of the vessel at an arbitrary point.
 Calculation of weights and centres of gravity per the elements and for the vessel as a whole is implemented.
 Calculation of test pressure per elements is implemented.
 Help System has been improved; contextual fetching of the relevant sections from the dialogues has been implemented.
 Calculation of filling is reworked using geometric kernel functions. visual representation of filling as translucent volume of product is implemented.
 Standard element selection database has been improved:
 A common database for selection of pipes is created (ASME B36.10M2004, GOST 1070491, GOST 1848279, GOST 2029585, GOST 325282013, GOST 326275, GOST 332282015, GOST 49490 , GOST 55075, GOST 873278, GOST 873475, GOST 994081, GOST 994181);
 A flat steel database is created (GOST 1990474, GOST 1990374);
 Accordingly, selection of standard shells, tubes, coils, tubular steel structures, negative allowances have been updated;
 Combined selection of flanges and pipes is now implemented;
 Selection of negative allowances for heads, skirt elements and nozzles is added;
 Consideration for changes to GOST 332592015 (ISS 23.040.60) is now added.
 Selection of saddle support is now fixed (there was an error in thickness of the supporting plate).
 External loads can be now set for any nozzle, not only for the radial one (for transferring to the supports and exporting to âNozzleFEMâ).
 When creating necks, procedure limitations, instead of restrictions, are made as warnings.
 We have implemented a system for automatic backup and recovery of files, in the event of an abnormal termination of the program.
 Parameters Py, Dy for flange were cleared, when copyingpasting. Fixed.
 Now the program works faster: At group editing or deleting of elements, a rebuilding is performed for once only.
"PASSATHEAT EXCHANGERS" module:
 For air coolers, the following options are added:
 To specify individually the materials of the element walls;
 To specify individually the allowances, negative tolerances;
 To specify negative tolerances from database;
 Calculation of screw plugs with estimation of torque value is now added;
 Analytical model of type 3, as per RD RTM 261379, is now added;
 Calculation of holes in cast and stamped covers has been added.
 We have added calculation of cylindrical shells of columns vessels (towers) from influence of external loads as per PRESSURE VESSEL DESIGN HANDBOOKÂ», Henry H. Bednar.
"PASSATTanks" module:
 Option âSkylightâ for conical roof has been added.


2.10.07 16.09.2016 
BASIC Module:
 We have fixed problems, concerning geometric kernel with exporting to IGES format that have encountered in version 2.10.0.6.
 We have improved algorithm of developing of beaded tieins, for correct building of straight tees.
 Estimation of axial force for flanges in the mode of automatic calculation of loads is now fixed.
 Tube thickness check as per RD 2618889 has been abandoned for the tubes welded in the flat covers.
 We have fixed a calculation of value l_{1}, for calculation of the ring stiffness factor.
"PASSATHEAT EXCHANGERS" module:
 We have fixed a bug â when calculating heat exchanger including seismicity, a pressure set by user was changed (for insignificant value).


2.10.06 22.08.2016 
BASIC Module:
 Some nozzle configurations in version 2.10.0.5 were processed incorrectly, (led to considerable excess of period of free oscillations). Fixed.
 A restriction for one (1) saddle support is now removed (a user can set more).
 We have fixed a program behaviour, when opening file by doubleclicking (in the absence of the license, a user is advised to set up a key, and the program icon is displayed in the taskbar).
 At operation of detachable flat cover, calculation of the flange part is performed now (earlier the calculation hasnât been performed at all, in accordance with GOST R 52857.2).
"PASSATSEISMIC (SEISMIKA)" module:
 At seismic calculation of the flat detachable cover, symbols ## were displayed in the report. Fixed.


2.10.03 22.03.2016 
BASIC Module:
 Flanges as per GOST 332592015 have been added to database;
 We have fixed a problem with copying elements from one vessel to another â previously when copying, general data settings had been transferred together with the element;
 We have adjusted database for sight windows (wrong flange thickness was selected for one standard (typical) size);
 We have fixed a misprint in calculation of detachable flat cover (factor F, does not affect an accuracy of result);
 In the calculation of flat cover as per ASME, symbols [ĂĄ] have been changed to S;
 Error in calculating of flat cover as per ASME has been fixed (now allowable stresses are taken not at operating, but at tightening temperature);
 Gasket selection database operation has been adjusted (sometimes wrong sizes could be assigned, starting from version 2.10.0.1);
 Calculation of distance between the flange faces, when selecting oval gasket, has been improved;
 We have fixed selection of fasteners diameter, when defining manholes as per OST (previously hole diameter had been selected);
 Presentation of secondary stresses calculation as per ASME has been improved.
"PASSATHEAT EXCHANGERS" module:
 In the aircooling unit (ACU) chamber with separating walls, their thickness was not considered during calculation of distance to the last separation wall. Fixed.

2.10.02 14.03.2016 
BASIC Module:
 In version 2.10.0.1 a bug has been fixed, because of which a wrong Type/Grade was selected for material, not the one that was intended by a dropdown list of the database.

2.10.01 03.03.2016 
BASIC module:
 Material database operation has been improved (now material can be selected much faster);
 For nozzles, a new option âCalculation in corrosive environment as per RD 260262â is added (earlier calculation has been always performed automatically);
 For flanges, a new option âAllowance for loads as per David Mossâ at calculation according to ASME VIII1 has been added;
 Open format file has been amended by a new section with apparatus general data;
 When copying elements, copying of color attribute is now available;
 Fields âObject nameâ and âInstallation nameâ have been transferred from the general data dialog to boilerplate text filling at report generation. Parameters âOrder numberâ, âOrder nameâ. âCalculation numberâ, âOrganizationâ and âCityâ are now connected with the model file;
 Line deleting error in the userâs table of materials has been fixed;
 At the report output for flanges in the input data section, now corrosion allowance defined by user is always displayed (earlier the output has responded to check âMake allowance for corrosion at stiffness calculationâ, it has no influence to accuracy of calculation);
 Dimension of nominal pressure (PN) has been corrected in gasket database as per BS EN 1514;
 Value s_{1} has been corrected in flange database as per BS EN 1092, type 11;
"PASSATCOLUMNS" module:
 At calculation of supporting assembly, skirt properties have been calculated at the skirt temperature. Corrected, now properties are calculated at the temperature of supporting assembly;
"PASSATHEAT EXCHANGERS" module:
 Pipe grid displaying has been fixed, for s_{p} < h;
 For heat exchangers with Ushaped tubes and tube grids welded to flanges, parameters D_{B}, s_{pn} are added;
 Generation of summary table for heat exchangers with Ushaped tubes and floating heads has been also added.

2.10 15.02.2016 
BASIC module:
 Calculation of the following elements as per ASME VIII (2013) Div.1 is implemented:
 Cylindrical shells (smooth and reinforced by stiffening rings);
 Conical transitions with end fixing nodes;
 Dished heads (spherical, elliptic, toroidal, conical);
 Flat heads;
 Reinforcements of holes;
 Detachable covers (flat, spherical, elliptic);
 Calculation of combined flanges as per ASME VIII (2013) Div.1 / Div.2 is added.
 Standard element database is now extended as follows:
 Apparatus flanges as per ASME B16.47 are added;
 Spiral wounded gaskets (SWG) as per GOST R 523762005 are added;
 Bolts material properties as per ST TsKBA (Central Design Bureau Standard, CDBA) 0122005 are added;
 Anchor bolts properties as per GOST R 5127499 are added;
 Flange inside diameters from ASME are defined in accordance with ASME B 16.34 (Table A1);
 Database for selection of saddle supports has been improved.
 Report generator has been improved. Doubling of lines in summary tables is now removed;
 A new option, quick model rebuilding by means of OpenGL, is now available;
 When editing model, analysis of changes is now available; at the constant geometry, model rebuilding is not performed;
 When exporting solid model, merging of components in assemblies with names is now available;
 When exporting solid model, definition of details density parameter is now available;
 For new vessels, option "Exclude corrosion in test mode" has been added;
 Option of relocation of child elements in the model tree within the same hierarchical layer has been added;
 Many captions in dialogues were not displayed completely, fixed;
 Method of nozzles designation has been improved (assignment + label);
 Material database is physically divided into standard and user parts. This will allow saving the material library at the change of program version;
 At calculation of horizontal vessels on supports, calculation of reinforcement of conical elements hasnât been reported, now it is fixed.
"PASSATCOLUMNS" module:
 âFoundation anchorage" and âRigid weightless baseâ options are added.
"PASSATHEAT EXCHANGERS" module:
 Pressure calculation of expander is added.

  