mt-vess revision history mt-vess revision 3.3.0 … · 2011-07-15 · mt-vess revision history...

MT-VESS Revision History

MT-VESS - Revision History

MT-VESS Revision 3.3.0 (January 2009)

1. General revision for the updating of the calculation codes.The revision has included:

ASME VIII div.1 ADDENDA 2008

EN 13445 with addenda until June 2008 (issue 31)

AD2000-MERKBLATT with addenda until February 20082. The following materials have been added to the materials database:

SA 240 317L-S31703 20591/2007 SA 317L(G5)-S31703 20601/2007 SA 182 F317L-S31703 20593/2007 SA 182 F317L(G5)-S31703 20603/2007 SA 249 TP317L-S31703 (wld) 20595/2007 SA 249 TP317L(G5)-S31703 (wld) 20605/2007 SA 312 TP317L-S31703 (smls) 20592/2007 SA 312 TP317L(G5)-S31703 (smls) 20602/2007 EN 10216-3 - P355 NH 70022/2002 SA 556 GR B2-K02707 20205/2007 EN 10028-2 - 13CrMo4-5 70231/2004 EN 10216-2 - 13CrMo4-5 70232/2005 EN 10222-2 - 13CrMo4-5 70233/2001 SA 556 GR C2-K03006 20465/2007 SA 403 304(G5)-S30400 20018/2007 SA 420 GR WPL8-K81340 20028/2007 SA 420 GR WPL3 20038/2007 SA 234 GR WPC-K03501 20068/2007 SA 234 GR WPB-K03006 20178/2007 SA 234 GR WP1-K12821 20218/2007 SA 234 GR WP11 CL1 20268/2007 SA 234 GR WP22 CL1-K21590 20278/2007 SA 403 316(G5)-S31600 20308/2007 SA 403 316L(G5)-S31603 20318/2007 SA 403 321(G5)-S32100 20328/2007 SA 234 GR WP5-K41545 20358/2007 SB 575-N06022 29771/2007 SB 619-N06022 29772/2007 SB 575(G5)-N06022 29781/2007 SB 619(G5)-N06022 29782/2007 SA 240 GR WPL6 20132/2007 SA 790-S31803 (smls) 20142/2007 SA 192-K01201 (smls) 20475/2007 EN 10028-2 - P235GH 70361/2004 EN 10028-2 - P265GH 70061/2004 EN 10028-3 - P275NH 70101/2004 EN 10028-3 - P275NL1 70111/2004 EN 10028-3 - P275NL2 70121/2004 EN 10028-3 - P355NH 70141/2004 EN 10028-3 - P355NL1 70151/2004 EN 10028-3 - P355NL2 70161/2004 EN 10028-7 - X5CrNi18-10 70011/2004



EN 10028-7 - X2CrNi19-11 70031/2004 EN 10028-7 - X5CrNiMo17122 70361/2004 EN 10028-7 - X2CrNiMo17122 70021/2004 EN 10088-2 - X5CrNi18-10 70051/2005 EN 10088-2 - X2CrNi19-11 70071/2005 EN 10088-2 - X5CrNiMo17122 70171/2005 EN 10088-2 - X2CrNiMo17122 70181/2005 EN 10222-5 - X5CrNi18-10 70043/2001 EN 10222-5 - X5CrNiMo17122 70053/2001 EN 10222-5 - X2CrNiMo17122 70063/2001 EN 10222-2 - P245GH 70023/2001 EN 10222-2 - P280GH 70073/2001 EN 10222-2 - P305GH 70083/2001 EN 10216-2 - P235GH 70002/2005 EN 10217-2 - P235GH 70012/2005 EN 12451 - Cu-DHP R250 79115/2002 EN 10028-7 - X2CrNiMoN2253 70191/2004 EN 10028-7 - X2CrNi18-9 70211/2004 EN 10088-2 - X1NiCrMoCu25205 70201/2005 SA 387 12 CL2-K11757 20581/2007

3. A buffer zeroing in the local loads calculation of the nozzles has been added to theprogram to avoid overwriting of data of one nozzle over the other one.

4. The MAWP for the conical section at the external pressure has been fixed. Theprogram crashed for cones in check.

5. The earthquake results page has been fixed. The weights of the elements below thesupport line were not printed in the results page.

6. The table of the total weights related to the various components of the vessel (plates,nozzles, etc.) has been added to the results report of the calculation.

7. A control has been added to the calculation of the Young modulus. When the designtemperature is greater than the maximum tabulated a warning message is issued andthe program stops.

8. The possibility to define type and position of the stiffening rings from input hasbeen added to the program.

9. The possibility to define from input the components of the total weight in the threeconditions of: erection, test, operation has been added to the program.

10. The calculation of the reinforcing pad for heads with cylindrical shell on the convexside has been added to the program. The user can define the dimension of thereinforcing pad from input.

11. The weight of the stiffening rings has been added as separated voice in the weightsummary in the calculation report.

12. The thickness for painting has been added in the input data of the vessel drawing13. The calculation of the allowable stress of austenitic stainless steels per EN 13445

has been fixed. For steels with elongation less than 30% the calculation of theallowable stress was wrong.

14. The possibility to define the material for large forgings or small forgings has beenadded to the nozzles flanges in function of the nozzle diameter.

15. The tolerance of materials per EN 13445 has been added to the program.16. The saddle standard and the saddle calculation has been revised. The saddle top

flange is now always considered and the transition plate is taken into considerationonly when required by the Zick analysis. The saddle stress analysis according to theMOSS is based now on the saddle top flange.



17. The possibility to specify the nozzle material from input has been added to theprogram. If this material is specified it overcomes the material read from thematerials class.

18. The possibility to force the upper ring of the skirt anchor box has been added to theprogram.

19. The possibility to specify heads from caps has been added to the program. At themoment this possibility is given only for unification ANSI.

20. The archive of the engineering data has been revised with the addition of the caps.At the moment, only caps per ANSI B16.9 are loaded in the archive.

21. The compensation limits from input have been added for the nozzles compensationanalysis according to ASME App.1-10.

22. The initialization of the system units has been revised to avoid wrong unitsdefinition for new calculations.

23. The nozzles compensation analysis per ASME App.1-10 has been revised to bealternative to the analysis according to UG-37 and App.1-7. Before both the analysiswere performed at the same time.

24. The calculation of the MAWP for girth flanges has been revised. The MAWP isnow calculated by setting the pressure on the other flange equal to the imposeddesign / test presssure and iteratively changing the pressure on the flange undercalculation.

25. The weight of the girth flanges has been fixed.26. The check for UG-45 in the nozzle calculation has been corrected. The reduction of

the 12.5% on the final thickness is done for nozzles from pipe only and is notapplied to nozzles from plate or from forging.

27. The printout of the materials ASTM on the nozzles datasheet has been fixed. Thematerial was printed as SA even when the option ASTM was selected.

28. The calculation of the Max Rated Pressure per ASME B16.47 Annex A has beenextended to the nozzles flanges.

29. The calculation of the compensation for nozzles according to ASME has been fixed.The value of the selfreinforce in circumferential direction was not initializedcorrectly.

30. The definition of the nozzles material for selfreinforcing nozzles has been revised. Ifnot explicitly defined the material is assumed from forging.

31. The skirt diameter at the top has been added as optional datum. If not specified thetop skirt is aligned to the external diameter of the head.

32. The gaskets of type Seal Welded and Diaphragm have been added to the gasketdatabase. The calculation method for flanges according to ASME / VSR / EN hasbeen updated accordingly.

33. The gasket width for the girth flanges calculation has been added as optional datumfrom input.

34. The area of the platforms exposed to the wind has been added to the program as anoptional datum. If specified, this value overcomes the one calculated by the programon the base of the platforms specified on the manholes.

35. The lining thickness has been fixed in the calculation of the nozzle compensationaccording to ASME App.1-10.

36. A new control has been added to the calculation of the nozzles to the externalpressure. The calculation is not done if the pipe height is less than or equal to zero.

37. The internals have been revised. All internals provided in the program are nowadded to the BOM and to the drawing of the vessel.



38. The horizontal Demister has been added to the program. The horizontal Demistercan be specified on horizontal vessels and with proper specification of elevation ,width and distance it can be positioned also inside vertical nozzles.

39. The vessel drawing has been completely revised. The drawing is now arranged onthe following layers:

BASEDRAW Includes the drawing margins and label block

SILOUHET Includes the outlines of the vessel

NOZZLELO Includes the nozzles on longitudinal view

NOZZLECI Includes the nozzles on circumferential view

SUPPORTS Includes the vessel support

INTERNAL Includes the vessel internals

STIFRING Includes the stiffening rings for external pressure

DETAILAP Includes the Appendix detailsMoreover, each table on the first sheet of the drawing is drawed on its own layer.As an additional option, the user can select the drawing style according to:1. Colors2. MonochromeWhen Colors style is selected the lines and the text are drawed with different colorsallowing AUTOCAD to associate different pens to the different colors used in thedrawing.

40. The criterium for the management of the revision on the drawing has been revised toshow all the three allowed revision in input with the possibility to modify them.

41. New stiffening rings have been added in the table of the flat rings in the ringsdatabase.

42. The project file has been updated with the addition of the wind and earthquake codeNTC / DM 2008.

43. For the following bolts materials the values of the limit diameters have beenmodified to comply with the bolt nominal diameters used in the database so to avoidretrieving problems:

A 193 B16 - A194 4-K14072 20214/1999

A 193 B7 - A194 2H-G41400 20094/1999

A 193 B7M - A194 2HM-G41400 20104/2003

A 193 B8CCL2 - A194 8C-S34700 20344/1999

A 193 B8CL2 - A194 8-S30400 20324/1999

A 193 B8MCL2 - A194 8M-S31600 20364/1999

A 193 B8TCL2 - A194 8T-S32100 20304/1999

A 320 L7 - A194 4-G41400 20054/200244. The allowable stress management has been revised to allow the possibility of using

allowable stresses from input.45. The drawing of the selfreinforcing nozzles on formed heads has been fixed. The

drawing was wrong for inclined and offset nozzles.46. The nozzles thickness calculation according to ASME UG-45 has been fixed. The

final thickness did not consider the reduction of 12.5% required by the code.47. The possibility to specify opening without nozzle has been added to the flanged flat

covers module.48. The stress indices option has been added to the local loads calculation according to

WRC 107/WRC 297.49. The stress analysis calculation for the support saddles has been added to the

program. The calculation is carried out according to D.MOSS "Pressure VesselDesign Manual" 3rd Edition.



50. The software key protection program for the programs evaluation has been changedto comply with Windows Vista requirements.

51. The calculation of the fireproofing on the supports has been added to the program52. A missing convergence in the calculation of external MAWP of cylindrical shell

with stiffening rings has been fixed.53. The nozzles module has been revised to fix the missed coupling in the nozzles

database when the inside diameter is specified in alternative to the nominaldiameter. The nominal diameter is now always used for the coupling in the databaseeven when the inside diameter is specified.

54. The vessel drawing has been fixed. The drawing generation crashed for particulartypes of sieve trays.

55. The vessel program has been fixed. Not all the properties of a nozzle were deletedcorrectly when deleting a nozzle.

56. The level of liquid over the distillation trays has been added in the input data. Theuser should pay attention because the weight of liquid on the trays is calculated onlyif the thickness is specified.

57. The calculation code for wind / earthquake according to NTC - DM 2008 (NewItalian code) has been added to the program.

58. The possibility to select the language for the BOM has been added to the program.The BOM will be printed now with the same language of the numerical report.

59. The weight of the internal coils has been added to the BOM.60. The additional axial forces acting over AD-2000 flanges has been added to the

flange input data.




1. The ASME VIII Div.1 code has been updated to the Edition 2007.2. The ASME II – Part D (materials) has been revised to the Edition 2007.

In particular

The following ASME charts for vacuum have been revised or added: NFT-3 NFT-4 NFT-5

The following materials SA 965 have been added in substitution of thecorresponding SA 336: SA 965 F304-S30400 20433/2007 SA 965 F304(G5)-S30400 20443/2007 SA 965 F304L-S30403 20383/2007 SA 965 F304L(G5)-S30403 20423/2007 SA 965 F304N-S30451 20453/2007 SA 965 F316-S31600 20363/2007 SA 965 F316(G5)-S31600 20373/2007 SA 965 F316L-S31603 20223/2007 SA 965 F316(G5)-S31603 20233/2007 SA 965 F321-S32100 20083/2007 SA 965 F321(G5)-S32100 20463/2007

The following materials have been uptodated: SB 171-C70600-O25 29211/2007 SB 265 GR 1-R50250 29921/2007

3. The following materials have been added to database:

SA 541 GR 22V-K31835 20473/2007

SA 542 GR D CL4a-K31835 20571/2007

SB 162-N02201 29761/2007

EN 10028-7 – X2CrNiMo17122 70021/2000

EN 10222-4 – P355NH 70033/2001

EN 10216-3 – P355NL1 70032/2002

EN 10269 – 25CrMo4 70044/20014. The rings for opening compensation has been added to the nozzle module.5. The option Large Opening ASME per App.1-10 has been added to the program.6. A new code to memorize the last units system has been added to the program. The

new calculation now starts with the last used units system.7. The possibility to review the results of previous calculations without the need to

rerun the calculation has been added to the program.8. The hydraulic test pressure module has been added to the Audit Report Book.9. The "adjacent nozzles summary" has been added to the Audit Report Book.10. The calculation datasheet related to flanged flat heads per EN 13445 has been fixed.

In check, the number of bolts was not printed.11. To make easier the understanding of the diagnostic messages, the sequence number

of the nozzle has been replaced with the nozzle item in all the diagnostic messages.12. The stiffening rings distance for cones to external pressure has been added to the

program.13. The tubular legs have been added to the legs module.14. The option to verify the loads generated by the legs over the shell by WRC 107 has

been added to the legs module.



15. The following materials have been added to the materials database:

EN 10028-7-X5CrNiMo17122 70041/2000

EN 10028-7-X5CrNi18-10 70011/200016. The calculation of the base skirt diameter has been fixed. The external diameter at

the base of the skirt was not in agreement with the diameter specified in input.17. The values of the Young module of the material SA 516 Gr.70 have been changed

with the values related to "Carbon ! 30%"18. The warning message U0102 has been fixed. The temperatures referred in the

message are in °C and not in °F.19. The management of the General Notes on the drawing has been fixed. When the

note descriptions overcame the number of placeholder \$ the drawing generationwent in error.

20. The Bill of Material has been fixed. The weight of conical sections (both Net andGross) was multiplied 2 times by the number of sheets required to form the cone.

21. The vessel drawing has been fixed. For adiacent conical sections the cones weredrawed with knuckles even for cones without knuckles.

22. The calculation of the cones to external pressure according to ISPESL-VSR hasbeen revised. In check calculation the values of the stiffening rings specified ininput were not taken into consideration for the check of the stiffening rings and forthe check of the junction cone-cylinder.

23. The printout of the warning messages on the tabular report has been extended over20 message.

24. The value of the saddle width (b on the sketch) passed from the standard to thecalculation module has been fixed. The previous value was referred to the width ofthe transition plate.

25. The value of SI (saddle bearing angle) shown on the schema of saddles "userstandard" has been modified to point to the saddle edges. In the previous schema SIwas referred to the transition plate edges.

26. The calculation of vessels according to the code EN 13445 has been added to

the program.

27. The following materials have been added to the materials database:

SB 709-N08028 29661/2006

SB 709(G5)-N08028 29681/200628. A warning message has been added to alert the user when, in the calculation of the

nozzles, the calculated thicknesses of the wall have been missed.29. The calculation of nozzles has been fixed. For nozzles over heads, in some cases,

the head joint efficiency used in the calculation of the nozzle compensation was notin agreement with the real efficiency used in head calculation.

30. The value of the external pressure in the calculation datasheet of the appendixcompensation has been fixed.

31. The effective thickness of the nozzle in the analysis of compensation for the codesVSR and EN 13445 has been updated. When the thickness of the nozzle is in excessof the one read from VSR Fig.1.K.2.1 or from EN 13445 Fig. 9.4-14 then theanalysis is performed at the maximum allowed thickness and a warning message issent to the user.

32. The analysis of the gasket overloading in the calculation of the girth flangesaccording to VSR / ASME / EN 13445 codes has been updated. An optional codehas been added in input to allow the user to select if the analysis must be done ornot. Moreover the analysis has been restricted to flat contacting surfaces (raisedface).



(Reference is done to VSR.1.U.3.3 and Taylor Forge Bulletin 502 for what concernsASME and EN 13445 codes)

33. The flat stiffening ring #80x10 has been added to the stiffening rings database.34. The calculation of the reinforcing pad diameter has been fixed for the codes VSR /

EN 13445 / AD-MERKBLATT.35. The nozzles calculation module has been corrected. In case of more than one nozzle,

sometime, only the last nozzle was written in the calculation datasheet.

36. The new Italian code for wind and earthquake DM 2005 (Decreto Ministeriale

23/9/2005) has been added to the program

37. The values of WL1 and WL2 in the nozzles welding analysis have been multipliedby the exact value 0.5*(2^0.5). The previous value was rounded to 0.7.

38. The base wind velocity at 30 ft has been added for “User” wind code.The base wind velocity is used in the vibration analysis by Mahajan / Zorrila.

39. The drawing of the nozzles over formed heads has been revised to take into accountfor the nozzle direction (radial, inclined, offset).

40. The cones calculation has been fixed. When the adjacent shell was from pipe theinside diameter of the cone was not updated to the inside diameter of the shell.

41. The nozzle allowable stress in the datasheet page of the nozzle compensation hasbeen corrected.

42. The opening compensation for VSR code has been updated in agreement to the paraVSR.1.K.6.For welding angle lower than 45° the allowable stress of the nozzle is multiplied bythe nozzle joint efficiency.

43. The possibility to force the minimum / maximum diameter of the compensation hasbeen added to the Appendix elements.

44. The double value of joint efficiency (wall / nozzle) has been added to the calculationof the nozzles subroutine.

45. The area A1 in the calculation of opening compensation has been fixed.The value in some cases was wrong when the required diameter of the reinforcingpad was bigger then the allowed limit.

46. The values of the materials data modified from input have been fixed. The specifiedvalues was overwritten by other quantities.

47. The calculation of the nozzles compensation according to ASME has been fixed.For nozzles with circumpherential inclination in some cases the calculation was inloop.

WARNING!!!

Because of the insertion of the EN 13445 code to the program, the old

input files are no more compatible with the new program version. Old

calculations must be updated to the new input format using the program

VES312to313.EXE included in the installation directory of the program.

The user is warned to carefully check the input data when moving old

input files to the new format.



48. The archive for flanges LWN 2” ASA #300 has been fixed. The diameter andthickness have been updated from the “Catalogo FERRARI”

49. The Metric Tables for pipes and flanges have been added to the archive.The values have been taken from:

B36.10M pipes C.S.

B36.19M pipes S.S.

B16.5M flanges from 1” to 24”For flanges diameters greater than 24” the values from B16.47 have been kept.

50. A check has been added to the calculation of nozzles local loads on spherical headsaccording to PD5500 when the value of the absissa is out of the curve limits.

51. The following materials have been added to the archive:

SA 240-S32750 20461/2006

SA 182 F53-S32750 20413/2006

SA 537 CL1-K12437 20471/2006

SA 213 TP304L(G5)-S30403 20105/2006

SA 213 TP304(G5)-S30400 20115/2006

SA 213 TP316L(G5)-S31603 20125/2006

SA 213 TP316(G5)-S31600 20135/2006

SA 213 TP321H(G5)-S32109 20145/2006

SA 213 TP321(G5)-S32100 20155/2006

SA 213 TP347H(G5)-S34709 20165/2006

SA 304L(G5)-S30403 20481/2006

SA 240 304(G5)-S30400 20491/2006

SA 240310S(G5)-S31008 20501/2006

SA 240 316L(G5)-S31603 20511/2006

SA 240 316(G5)-S31600 20521/2006

SA 240 316Ti(G5)-S31635 20531/2006

SA 240 321(G5)-S32100 20541/2006

SA 240 347(G5)-S34700 20551/2006

SA 240(G5)-S31254 20561/2006

SA 182 F304L(G5)-S30403 20143/2006

SA 182 F304(G5)-S30400 20153/2006

SA 182 F310(G5)-S31000 20293/2006

SA 182 F316L(G5)-S31603 20163/2006

SA 182 F316(G5)-S31600 20173/2006

SA 182 F321H(G5)-S32109 20183/2006

SA 182 F321(G5)-S32100 20193/2006

SA 182 F347H(G5)-S34709 20203/2006

SA 249 TP316L(G5)-S31603 20185/2006

SA 249 TP304L(G5)-S30403 20195/2006

SA 312 TP304L(G5)-S30403 20042/2006

SA 312 TP304(G5)-S30400 20062/2006

SA 312 TP316L(G5)-S31603 20082/2006

SA 312 TP316(G5)-S31600 20102/2006

SA 312 TP321H(G5)-S32109 20112/2006

SA 312 TP347H(G5)-S34709 20122/2006

SA 336 F316L-S31603 20223/2006

SA 336 F316L(G5)-S31603 20233/2006



SA 336 F316-S31600 20363/2006

SA 336 F316(G5)-S31600 20373/2006

SA 336 F304L-S30403 20383/2006

SA 336 F304L(G5)-S30403 20423/2006

SA 336 F304-S30400 20433/2006

SA 336 F304(G5)-S30400 20443/2006

SA 336 F321(G5)-S32100 20463/2006

SA 213 TP310MoLN-S31050 20435/2006

SA 213 TP310MoLN(G5)-S31050 20445/2006

SA 336 F304N-S30451 20453/2006

Note. The materials with (G5) have the allowable stresses increased according tothe note (G5) of Table 1A of ASME II-Part D.

52. For selfreinforcing nozzles the value of L1 in the compensation area as beencorrected according to the sketch (e-1) and (e-2) in FIG.UG-40.

53. Revision of the jacket analysis. The possibility to align the jacket to the top orbottom of the shell has been added to the program.

54. The calculation of the shell barrel for the external pressure in check has beencorrected. A stiffening ring was inserted even if not specified by the user.

55. The MAWP calculation for girth flanges according to VSR code has been fixed. Thecalculation did not converge for values of g1/go > 5.

56. The allowable stresses calculation with allowable forced from input has been fixed.The calculation was in error for materials with allowables depending on thethickness when the calculated thickness was greater than the first limit thickness.

57. The vertical forces for earthquake have been included in the earthquake “USER”code. Moreover the vertical forces are now multiplied by the safety factor.

58. The value of Lm for selfreinforcing nozzle in the compensation according to ASMEhas been fixed. The value forced from input (Lo) was not congruent with thecalculated value.

59. The calculation of the formed heads in check according to ASME has been fixed.The program did not keep the specified thickness when less than the TEMAminimum.

60. The tolerance of the wall has been fixed in the calculation of the compensation ofthe Appendix.

61. A control has been added to the calculation of the girth flanges in check to verifythat the distance between the bolts circle diameter and the hub greater outsidediameter be enough to allocate the nuts.



MT-VESS Revision 3.1.0 (February 2007)

1. The ASME VIII Div.1 code has been updated to the Addenda 2006.2. The ASME II – Part D (materials) has been revised to the Addenda 2006.

In particular

The following ASME charts for vacuum have been revised or added: HA-1 HA-2 NFN-24 NFT-1 NFT-2 NFT-4

All the Ferrous material included in database have been revised and thedependence of the materials from the thickness, if any, has been inserted in thedatabase.

3. The AD-MERKBLATT code has been updated to the latest revised sections.In particular the following sections have been revised or added to the program:

Section B1 Appendix 1. New added to the program

Section B5. Revised all tubesheets calculation

Section B7. Revised bolts safety factor and new gaskets added4. The following materials have been added to database:

SA 240-S31254 20441/2006

SA 268 26-3-3 Sml-S44660 20455/2006

SA 662 GR B-K02203 20451/2006

SB 688-N08367 29731/2006

EN 10222-2 – P245GH 70023/1999

EN 10269 – 42CrMo4 70034/19995. The field related to number of pages in the calculation datasheets has been enlarged

to allow numbers greater than 100.6. The program revision has been added on all the calculation datasheets.7. The detail of the flange in the vessel drawing has been fixed regarding to the riser

thickness.8. The management of appendix elements has been revised to allow appendix ending

with flange and appendix positioned on different main elements. Both thecalculation and the drawing have been revised.

9. The nozzle material in the local loads calculation has been fixed.10. The stiffening rings postioning has been fixed.11. The printout of the index of the audit report has been fixed regarding the starting

page.12. The height of the elliptical head 2:1 on the ASME datasheet has been fixed. The

height was wrong for heads with internal lining.13. The calculation of adjacent nozzles on appendix has been fixed for appendix with

more than one cylindrical shell.14. The calculation datasheets related to the compensation of the appendix have been

added to the audit report.15. A control on the presence of the nozzle data in the archive has been added to avoid

the program crash.16. A control has been added in order to increase the nozzle height when the total length

of the nozzle flange is greater than the standard nozzle height.



17. The LWN flanges from 26” to 42” for the ratings 150/300/400/600/900 have beenadded to the nozzles database.

18. The option B1 for B in the Appendix 2-3 has been added for the ASME flangescalculation.

19. The calculation of the flanges Loose / Lap Joint with hub according to VSR / ASMEhas been fixed. The calculation was in error when the analysis of rigidity was thecontrolling condition.

20. The printout of the datasheets pages has been fixed. The starting page forced by theuser was not assumed correctly by the program.

21. The height of the internal / external rings for spiral wound gaskets has been added tothe program.

22. The conversion factor of the allowable stresses in the printout of the calculationdatasheet has been aligned with the value used in the unit system file.

23. The calculation of the MAWP has been added to the program.24. The calculation in check mode has been added to the program. For every component

in the vessel it is now possible to specify the geometrical properties and the programchecks if the given geometry can resist the vessel design conditions.

25. The calculation check of the standard girth flanges has been added to the program.The corresponding datasheets have been generated and added to the audit reportprintout.

26. The drawing of the girth flanges in the vessel drawing has been improuved to takeinto account the standard girth flanges.

27. The following material has been added to the archive.

EN 10269 – C35E28. The mechanical properties of the following materials have been extended until 250

mm.

EN 10028-3 – P275NH

EN 10028-3 – P275NL1

EN 10028-3 – P275NL2

EN 10028-3 – P355N

EN 10028-3 – P355NH

EN 10028-3 – P355NL1

EN 10028-3 – P355NL2

WARNING!!!

Due to the many improuvements to the program, the old input files are no

more compatible with the new program version. Old calculations must be

updated to the new input format using the program VES302to310.EXE

included in the installation directory of the program.

The user is warned to carefully check the input data when moving old

input files to the new format.



29. The calculation of the equivalent pressure due to external loads and moments hasbeen added to the girth flanges calculation. The equivalent pressure is taken intoconsideration for the flanges according to VSR/ASME/EN codes.

30. The saddle “User” have been added to the program. The user can now specifysaddles type different from the Micro Techno standard included in the program.

WARNING!!!

The table of “User Standard” for skirt has been modified.

Older vessels calculations for which “User Standard” for skirt were specified

should reenter the skirt “User Standard” table before running with the new

program version.

31. A warning message has been added to alert the user when the calculation is lockedby other user.

32. The default in the changing of the localization data has been modified frompermanent to temporary.

33. The calculation of the nozzle compensation for ASME code has been changed. Theprogram calculates now the compensation on all the area (before the calculation wason half the area). The datasheets has been changed accordingly.

34. The formula of the allowables of the SH stress for the shell in the datasheets forflanges ASME Loose WN has been fixed to 1.5*fv.

35. The calculation of the flanges loose with hub for ASME and VSR has been fixed.The calculation was in loop in the rigidity analysis.

36. The possibility to verify existing nozzles has been added to the program.37. The calculation of the selfreinforcing nozzles according to ASME has been

completely revised to allow both of the configuration (e-1) and (e-2) of Fig.UG-4038. The calculation of the large openings per ASME 1-7(b) has been added to the

nozzles analysis.39. The calculation of the nozzle thickness per ASME UG-45 has been added to the

nozzle datasheet.40. A check has been added to the program alerting the user when the thickness of the

nozzle is lower than the one required by the ASME UG-45.41. The calculation of the allowable stresses for Nickel and Titanium materials

according to ISPESL-VSR has been added to the program.42. The calculation of the allowable stresses for Nickel and Titanium materials

according to EN 13445 has been added to the program. The same criteria of the nonaustenitic steels are applied with a warning message to the user.

43. A warning has been added in the nozzles calculation when the specified NominalDiameter does not match with the values loaded in the database. The nozzle iscalculated as nozzle from plate.

44. The calculation of the allowable stress of Stainless Steels with elongation greaterthan 35% per ISPESL-VSR has been fixed according to the “RaccomandazioniCTI”.

45. The calculation of the flanges according to VSR has been fixed. The test conditionwas not taken into consideration in the calculation of the moment for the seatingcondition.

46. The rigidity analysis for flanges Lap Joint for the codes ASME and VSR has beenfixed. The calculation was not performed before.

47. The calculation of the wind and earthquake according to ASCE 2002 has beenadded to the program.



48. The local load analysis for all the vessel nozzles has been added to the program. Theuser can select the range of the nozzle to analyze.




1. Revised for ASME VIII Div.1 Addenda 2005.2. General revision of the material file to comply with the requirements for the

calculation of the allowables stresses according to the European code EN 13445.3. The following materials have been added to the archive: SA 266 Gr3-K05001 SA 765 GR II-K03047 SA 234 GR WPB-K03006 SA 789-s32750 (Smls) SA 790-s32750 (Smls) SB 625-N08904 SB 677-N08904 A 240-S32760 A 789-S32760 EN 10222-5 X2CrNiMoN2574 SA 240 317Ti-S31635 SB 75-C12200-H80 SB 111-C12200-H80 SB 466-C70600-O60 SF-Cu F25 DIN 1785 EN 20898 Cl.5.6 EN 20898 Cl.8.8 EN10028-7-X6CrNiMoTi-17-12-2 EN10222-5-X6CrNiMoTi-17-12-24. The tensile strength has been added to the materials quantities that the user can

change during the calculation.5. The brackets calculation has been fixed. Some data forced from input was not stored

correctly.6. The material of the transition plate of the brackets has been fixed in the B.O.M.7. The distances between the reference lines of the elements specified by the user are

checked to comply with the requirements of the program.8. The drawing of the flange coupled with the shell barrel has been fixed.9. The input of the vessel geometry has been fixed for the sequence "Flat flanged

cover/ flange/ conical section".10. The calculation of LWN nozzles to external pressure has been fixed. The pipe

height needed for the external pressure has been added to the calculation.11. The calculation of the girth flanges in design mode has been fixed. Sometime, when

the hydraulic test was the controlling condition, the bolts number calculated by theprogram was wrong.

12. The flanges calculation loop has been revised. Some quantities were not initializedat the beginning of the loop.

13. The flanges drawing has been modified.14. The possibility to specify the minimum diameter of the reinforcing pad has been

added to the calculation of the nozzles.15. The wind exposed surfaces for horizontal vessels (longitudinal and transversal) have

been added as optional in input.16. The calculation of girth flanges thickness according to VSR and ASME has been

fixed for flanges Loose with hub or Lap Joint with hub.



49. The stiffening ring archive has been modified. Tables specific for each ring shapehave been added. The program has been revised to interface correctly the newarchive.

50. The following missing ASME charts for vacuum have been added to to the archive:

HA-6 / HA-7 / HA-8

NFC-7 / NFC-8

NFN-22 / NFN-23 / NFN-24 / NFN-25 / NFN-2651. The calculation of the cone to external pressure for ASME has been revised to

manage stiffening rings between the cone tangent lines.52. The calculation of the parameter K [ASME 1-4(c)] for elliptical heads has been

revised to have K=1 for elliptical heads 2:1 (K is calculated always in non corrodedconditions).

53. The calculation of the skirt thickness of elliptical heads for ASME has beencorrected assuming joint efficiency = 1.

54. The hub length calculation of the girth flanges has been fixed assuming a minimumvalue of 25 mm.

55. The weight of the stiffening rings required on the saddles has been added to the totalweight for the calculation of the longitudinal force due to the wind (0.4*Wt)

56. The calculation of the reinforcing pad for ASME nozzles has been fixed. Thediameter of the pad on circumferential view was not properly initialized so toremain memorized also for next nozzles.

57. The moment for the calculation of the horizontal forces due to wind and earthquakehas been fixed.

58. The printout of the datasheets has been fixed. The font was not set correctly in sometype of personal computers showing strings of unreadable characters.

59. The DXF library for the generation of the exchangers drawing has been updatedwith the insertion of colors and layers.

60. The names for the DXF drawing generated by the program have been extend toaccept more than 6 characters.

61. The filename in the output report header has been incremented to 24 characters.62. The calculation of the adjacent nozzles according to VSR has been fixed. The

calculation crashed in the adjacent nozzles analysis when the compensation of oneof the nozzles was not required because the nozzle diameter was lower than theminimum required by the code.

63. The calculation of the half-apex angle in function of the cone height has beenrevised. The former method was wrong for some values of the cone height anddiameters.

64. The USB keys have been added to protect the program.65. Corrected the program. The program crashed when the first element was inserted

and then deleted.66. Corrected the program. The formed heads after conical sections were not managed

correctly for Appendix elements.67. The BOM has been fixed. The shell from pipe were indicated as shell from plate.68. The Young modulus and the expansion coefficients have been revised according to

the ASME II Part D Ed.2004 for all the ASME materials in the database.69. The minimum creep temperature and the material elongation have been added to the

material database.70. The calculation of the allowable stress for austenitic stainless steels with elongation

of 35% for VSR has been modified according to the "Raccomandazioni CTI".71. The license agreement has been added in the program installation.




1. The following new materials have been added to the materials database:

SA 36

SB 423-N08825

Ti2 3.7035

SA 213 T11

SB 424-N08825

SA 182 F321

SA 213 TP321

SA 336 F321

SA 336 F22 Cl.3

SA 387 GR22 Cl.2

SA 193 B7M / SA 194 2HM

SA 213 T22

SB 575 – N06059

SB 564 – N06059

SB 626 – N06059

EN 10028-3-P275 NH

EN 10028-3-P275 NL1

EN 10028-3-P275 NL2

EN 10028-3-P355 N

EN 10028-3-P355 NH

EN 10028-3-P355 NL1

EN 10028-3-P355 NL2

SA 182 F304L-S30403

SA 213 TP304L-S30403

SA 240 304L-S30403

SA 312 TP304L-S30403

2. All ASME materials have been revised to be in agreement with the ASME II Part DEd. 2004

3. The allowable stress calculation for non ferrous materials under AD-MERKBLATTcode has been added.

4. The calculation according to ISPESL-VSR of elliptical and torispherical heads withnozzles outside the 80% of the diameter has been added to the program.

5. The girth flanges calculation according to AD-MERKBLATT has been fixed. Thecalculation crashed when bolts different from DIN 2510 were specified.

6. The bolts table TEMA D-5M has been added to the bolts database.7. The AUTOCAD script to launch the program has been modified to work with the

Italian version of AUTOCAD.8. A check on the fluid density specified by the user has been added to the program.9. The analysis of vibrations generated by the wind according to the method of Kanti

K. Mahajan (HP May 1977) has been added to the program.10. The unit of the hydraulic test pressure has been fixed.11. The datasheet related to the cone ends as line of support has been fixed.



12. The joint efficiencies at the top and bottom of the skirt have been added to theprogram.

13. The calculation of the strain for torispherical heads has been fixed on the base of theradius specified in input.

14. The material tolerance has been added to the support saddles calculation.15. The saddle angle storing has been fixed. It was always set to 120°.16. The nozzles welding distance has been added to the results report.17. The printout of the stiffening rings on the results report has been fixed.18. The values of the table VSR.1.E.3 related to the formed head have been corrected

according to the Errata Corrige of 31/03/2003.19. The thickness tolerance has been added in the calculation to the external pressure of

the formed heads and conical sections according to ASME.20. The possibility to specify from input the nozzles reinforcing limits along the wall

and along the pipe has been added to the program. When these values are specified,the program will assume the least value between the given value and the valuecalculated according to the code.

21. The calculation flow for the girth flanges has been revised to take into considerationthe possibility that the hydraulic test pressure be the controlling condition. Theflange is now designed for all the conditions and then rechecked with the heaviestgeometrical shape for all the calculation conditions.

22. The analysis of adjacent nozzles has been added to the program. The section“ADJACENT NOZZLES SUMMARY” in the output report gives a list of all thepossible nozzles combinations with a flag showing if the analysis is satisfied or not.

23. The stability results printout has been modified. The values of the calculated andallowed stresses for tension and compression have been grouped at the end of thepage for a better readability.

24. A bug in the analysis of adjacent nozzles related to the specification of a negativeoffset has been fixed.

25. The printout of the adjacent nozzles summary has been revised to avoid overlappingof the values when the nozzles combinations were to numerous.

26. The presentation of the audit report page has been fixed. The program gaves anoverflow runtime error when the monitor resolution was higher than 800x600 andthe nozzles combinations were too numerous.

27. The minimum thickness for pipes according to ISPESL-VSR.1.M has been added tothe program. This value is applied for pipes diameter of 220 mm and under.

28. The calculation of the external radiuses of the nozzles (a1, a2) required for theadjacent nozzles analysis according to ISPESL-VSR and AD-MERKBLATT hasbeen modified to take into account for the changing of the radius along thelongitudinal and circumferential direction of the nozzle. The values of a are nowcalculated along the line passing through the center of the nozzles.

29. Some incongruencies related to the management of the pipe material in the nozzlescalculation have been fixed. The discrepancies were due to the “pipe materialselection” and the “Maximum Nominal Diameter from pipe”.

30. The nozzle direction has been added to the nozzle input data to be specified as:radial / inclined / offset.This makes easier for the user to specify the nozzle geometry and positioning.

N.B. The user should revise the input of previous calculation to comply with

this new code.

31. The weight of the support legs on the Bill of Material has been fixed.32. The option for the calculation of the ASME allowable stress in test as 90% of the

material yield strength at room temeprature has been added to the program.



33. The Reference Line height for the calculation of the wind speed on vessel supportedby legs has been fixed. There was a difference of the head neck length in theelevations of the single elements for wind speed calculation.

34. The nozzle drawing for hillside nozzles (180° orientation) has been fixed.35. In the nozzle check performed using the VSR code, a warning message is issued

when (d/2*ri) > 0.5. All checks have been revised to be compliant with the rules ofVSR 1.k.2.2.

36. The drawing of nozzles positioned on formed heads of appendices has been fixed.37. The hillside nozzle positioning on cylindrical/conical shells has been fixed on the

graphical silhouette of the vessel.38. The distance calculation on adiacent nozzle on cylindrical shells is now performed

correctly.39. The nozzle calculation for nozzle from pipe at high pressures has been fixed.40. The nozzle calculation for not standard nozzles has been fixed.41. The check on adiacent nozzles is now performed correctly also in case of non-

compensated nozzles with the same heigth and orientation.42. The stiffening rings required for Zick calculation of the saddles have been added to

the B.O.M.




1. The following materials have been added to data base:

SA 240 GR410S

SA 268 TP410

SA 182 F6aCL2

SA 240 S31803

SA 182 F51

SA 789 S31803

SA 387 GR11 Cl 2

SA 336 F 11 Cl 2

SB 626 N10276

SB 564 N10276

SB 619 N10276

EN 10025 - S235 JR

EN 10025 - S275 JR2. ASME Chart CS-3. Now the test for T > 300 °F is correctly done.3. Audit Report - Nozzle. If the nozzle diameter is less than the minimum to be

reinforced a note is now printed in the datasheet for explicitely indicating wy thecalculation has been skipped

4. Vertical vessels with jacketed conical head have been revised:

Input - Nozzle. The nozzle elevation is now calculated correctly.

Calculation. Now the nozzle on the conical head is taken in account and theaudit reports for the conical section are now generated correctly. Stiffening isnow calculated correctly for External Pressure.

Drawing. Several inconsistencies have been fixed.5. The code identifying Reinforcing type on Flat Flanged Heads is now appropriate.6. Legs (user). The user table for legs is now handled correctly.7. Coupled Flanges. The Audit Report generation is now correct also in this case.8. Brackets. Some inconsistencies have been avoided allowing to specify in input the

brackets elevation (middle span). The choice of the calculation code is now allowedalso for brackets.

9. Audit Report. The page counting has been revised for avoiding someinconsistencies. Problems caused by welding analysis have been fixed.

10. Audit Report. The compensation for large openings (ASME) is now calculatedcorrectly.

11. Nozzles. If the nozzle heigth is supplied in input, it will be mantained alerting theuser if less than the one required by the program.

12. Nozzles. The abnornal program termination in case of more than 25 nozzles hasbeen fixed.

13. Legs User Table. The program now searches just in th values supplied by the user.14. Legs. The vibration period of vessels on legs is now computed correctly with the

reference to the shape used.15. LAN version. Installing programs on the server, they can be executed from any PC

connected in the LAN.16. Nozzle Table. LWN for DN 15, 20 mm have been included.17. Formed Heads. The Audit Report reports now the proper materials when the

material classes for the head and the adiacent shell are different.



18. Nozzles. The minimum welding distance is now computed taking care of themaximum distance for compensation, as required by Codes.

19. Formed Heads. The thickness supplied in input is assumed as is without rounding itto the nearest mm.

20. Bolt Table. The reference name of the table has been corrected in "TEMA Tab. D5"from "ANSI B18.22" as erroneously indicated before.

21. Nozzles. The formula for "lm" in the VSR/AD-MERKBLATT Audit Reports hasbeen fixed. Now it is congruent with the calculation.

22. Diagnostic Messages. The messages have been completely revised for a betterunderstanding of them. In most cases also values who generated the message arealso printed.

23. Nozzles. The Nozzle Rating supplied in input is now reported correctly on theoutput.

24. Allowable Stress @20°C. The value is now computed also when the Test Pressurehas been supplied by the user.

25. Flanges. The error occurring when more than 2 main flanges were specified hasbeen fixed.

26. Wind check. The deflection caused by wind at the top of vertical vessels is nowreported in the output.

27. Skirt . The error occurring in verifying the bolts of the using the "User" standard hasbeen fixed.

28. LWN Nozzles . The heigth of LWN nozzles is now computed correctly if specifiedin input.

29. Skirt . The skirt Audit Report has been corrected for properly handling materialswith tensile strength=0 in the base ring calculation.

30. The neck length for Elliptical/Torispherical heads has been added as input datum.The user can, now, force a different value from the one calculated by the program.

31. The rounding thickness for plates has been added to the program. This gives thepossibility to round the thicknesses to the nearest American Nominal Size (1/16 “ =1.5875 mm)

32. The thickness of the formed heads in check for VSR code has been fixed.33. The table VSR.1.E.1 of the coefficients C/Co related to the calculation of formed

head according to ISPESL-VSR has been revised according to the Rev.1995 of thecode.

34. A bug in the calculation of conical section to internal pressure according to AD-MERKBLATT has been fixed. The calculation did not converge for very low valuesof the pressure.

35. The drawing of the nozzles in the vessel drawing has been totally revised.36. The printout of the calculation of the Hydraulic test pressure has been added to the

results of the exchangers calculation.37. A new screen related to the Bill of Materials has been added to the program. This

screen allows to customize the Bill of Materials and to add data that the programcannot manage.

38. The required height of the nozzles pipe in the Bill of Materials has been increased totake into account for working losses.

39. The nozzles bolts and gaskets have been added in the Bill of Materials.40. The blind flange has been added as separated item in the Bill of Materials.



MT-VESS Revision 2.3.0 (June 2003)

1. The net weight of the saddles gussets has been corrected on the B.O.M. of thevessel.

2. The nozzles from forging have been added to the B.O.M. of the vessel.3. The material code of the nozzles has been fixed. It was saved in a wrong way.4. The input data for wind and earthquake have been fixed. Some problems occurred in

the data storing that could cause a wrong saving of the data specified by the user.5. The input data reprint in the calculation results printout has been fixed.

The data shown for input system units different from Metric corresponded to theconverted data and not to the specified data.


1. The material data bank has been revised with:- addition of the material FE 42-1 UNI 5859-66- Revision of the ASME materials according to the ASME II – Part D addenda

2002. The new revised material have the revision year 2002.2. The ISPESL-VSR code has been updated to be harmonized with the European PED.

The most important changings refer to:- The safety factor for allowable stress in hydraulic test has been changed from

1.1 to 1.05- The hydraulic test pressure is now calculated as the maximum value between:

Pid = 1.43 * PdPid = 1.25 * Pd * f20/ft

3. The AD-MERKBLATT code has been updated to be harmonized with the EuropeanPED. The most important changings refer to:- The safety factor for allowable stress in hydraulic test has been changed from

1.1 to 1.05- The hydraulic test pressure is now calculated as the maximum value between:

Pid = 1.43 * PdPid = 1.25 * Pd * f20/ft

4. All the writings in the output results have been translated in Italian language. Thelanguage of the output sheets is now congruent with the language selected for theinput.

5. The drawing title block has been added to the configuration file. The company logois now added automatically in the label of all the the drawings generated by theprogram. The program gives also the possibility of adding a different title blockspecific of the calculation.

6. The Audit Report feature has been greatly improved with the addition of thefollowing items:- Cover pages editor that allows to add free pages to the Report Book generated

automatically by the program.- The sections related to the Wind, Earthquake and Stability analysis have been

added to the Report Book.- The sections related to the support skirt and legs have been added to the Report

Book.- The option of printing the Table of Contents has been added to the Report

Book.The user has now the possibility of generating from inside the program a completeAudit Report Book to present to the inspection authority.



7. Saddles calculation as per ZICK-VSR code. The transition plate data written on theoutput data sheets have been fixed.

8. The calculation of the stiffening rings positioning has been fixed to avoid theinstallation of one ring when not required.

9. The management of the LWN flanges according to UNI/ISO has been fixed. Theflanges are now managed as ANSI flanges because they are not provided inUNI/ISO standard.

10. The possibility of specifying the type of material for each nozzle has been added tothe program. The user can now select the nozzle material from plate, pipe orforging.

11. The calculation of nozzles without flange has been fixed. These nozzles wereassumed as coupling in the previous version.

12. The description of the material of the reinforcing pad has been canceled from thedatasheets for selfreinforcing nozzles.

13. The hub outside diameter for LWN flanges has been added to the flanges database.The program for the database management has been updated accordingly.

14. The LWN nozzles in the BOM have been fixed. They are now written in the flangessection only.

15. The material of LWN flanges has been fixed. It is now assumed by forging.16. The nozzle minimum thickness specified in input has been fixed.17. The converge criterium of the calculation has been modified to allow the

convergence even if there is a cladding thickness with decimal (let say 2.5 mm)18. The allowable stress for support calculation has been corrected when the yield

strength is specified in input.19. The weight of the stiffening rings required by the saddles analysis has been added to

the vessel weight.20. The input data reprint related to the min / max size of the stiffeining rings has been

fixed.21. The required minimum thickness to the external pressure for cylindrical shells

according to ASME has been fixed.22. A message to alert the user when calculating vessel with cladding material has been

added to the program.23. The allowable stress in the saddles analysis has been fixed to match the specified

saddle calculation code.24. Saddles analysis calculation has been fixed for cladded vessels.25. A control has been added to the brackets calculation when the check is not satisfied.26. The allowable stress calculation as per VSR code related to Ni & Alloys and Ti &

Alloys has been modified according to the VSR.2 Edition 1999.27. A User Standard has been added to the support legs calculation. This standard

allows to insert legs sizes different from the ones provided by Micro Technostandard.

28. The option of specifying the base ring thickness and allowable stress has been addedto the support skirt calculation.

29. The allowable stress at 20°C has been added to the output results printout.30. The base ring allowable stress has been corrected. The value of the skirt material

was assumed instead of the base ring material.31. The weight of nozzle pipe hass been fixed. The weight was wrong when one of the

nozzle was sefreinforcing.



MT-VESS Revision 2.1.0 (May 2002)

1. The German Code AD-MERKBLATT has been included in the program.2. The Bill of Materials feature has been added to the program. The Bill of Materials

can be viewed, printed or exported in an Excel file, directly or as CSV (CommaSeparated Value) file.

3. The Audit Report Book has been added to the program. The datasheets withformulas for all vessels components are automatically generated and can beviewed and/or printed.

4. The ASCII Input/Output Printout has been totally rewritten to allow a bettercontrol on the vessel calculation.The Input reprint has been modified to closely follow the sequence of the inputscreens. All the values and codes are written in clear to allow a better check of thevalues specified in input.The Output is now arranged in tables showing the results of the calculationsrelated to:

internal pressure (design and test)

external pressure

wind and hearthquake calculations

stability analysis calculations

nozzles

total weights

loading data

In particular, for wind, earthquake and stability analysis formulas and referencesto the codes have been added to the results.

5. The positioning on the vessel of stiffening rings is now calculated by the programand reported in the outputs: on the basis of the maximum allowed stiffeningdistance calculated for each section, the proper number of rings with theelevations from the bottom Reference Line and the type of ring calculated isshown on a table in the results of the vessel calculation. Rings are also shown onthe vessel drawing.

6. The following new materials have been added to the material archive:- SB 265 GR 9 2991/2001- SB 861 GR 9 2992/2001- SB 338 GR 9 2995/2001- SB 265 GR 12 2951/2001- SB 861 GR 12 2952/2001- SB 381 GR F12 2953/2001- SB 338 GR 12 2955/2001- X5CrNi 189 DIN 17440 5011/1972- X2CrNi 189 DIN 17440 5341/1972- X10CrNiTi 189 DIN 17440 5321/1972- X5CrNiMo 1810 DIN 17440 5301/1972- X2CrNiMo 1810 DIN 17440 5311/1972- X10CrNiMoTi 1810 DIN 17440 5331/1972- St 37.0 DIN 1629 5362/1984- St 44.0 DIN 1629 5422/1984- C 22.8 DIN 17243 5073/1990- C 21 VdTUV 39913 5093/1996



- Ck 35 DIN 17240 5094/19767. The support position in the wind calculation has been fixed.8. The quote H1 for brackets has been zeroed when the calculation is saved with a

new name.9. The calculation of tolerances in ASME and VSR Heads has been fixed.10. The subroutines for reading info from Windows register have been modified for

allowing to non-administrators in Windows NT/2000 to read the register.11. The minimum thickness specified in input for cones and formed heads has been

changed from "corroded" to "istalled".12. The minimum ring size for calculation to external pressure has been added in

input. Now the user can select a range of values in the ring database whencalculating the vessel.

13. The option of selecting the combined moment of inertia has been added to theinput data. Selecting a combined moment of inertia will take into account for thecontribution of the vessel barrel to the moment of inertia.

14. The reading of the flange values from the database in the liquid internaldistributor has been fixed.

15. A control on the vessel geometry toolbar has been added to avoid user mistakes.Now only the icons correctly defined by the vessel position and by the vesselqualifier are shown.

16. The default element for the skirt attack has been changed in order to join the skirtto the bottom head instead of the bottom cylinder.

17. The calculation of the Lap Joint flanges with hub according to ASME and VSRhas been fixed.

18. The bolts allowable stress for flat flanged cover according to AD-MERKBLATThas been fixed. (Yeld strength divided by 1.5 or 1.1 according to section B7).

19. The calculation of the minimum required thickness to external pressure has beenadded to formed heads calculated according to ASME.

20. The program ESL has been modified to allow the management of the Key onoperating systems based on unicode (WINDOWS 2000 Chinese version)

WARNING!!!

Due to the many improvements to the program, the old input files

are no more compatible with the new program version. Old

calculations must be updated to the new input format using the

program VES111to210.EXE, included in the installation directory

of the program.

The user is warned to carefully check the input data when moving

old input files to the new format.



MT-VESS Revision 1.1.0 (January 2002) (Previous one: 7.0.6)

1. The icon on the warning messages at the end of the calculation has been changed.2. The call to AUTOCAD 2000 has been added to the configuration mask.3. The crown radius specified in input for elliptical and torispherical heads has been

fixed.4. The tables of bolts data for girth flanges calculation have been implemented until

4 inches bolts diameter.5. The possibility of selecting the printer has been added in all the printouts provided

in the vessel results.6. The drivers for the ESL device have been updated.

MT-VESS Revision 7.06 (May 2001)

1. The reaction of the gaskets due to the partition ribs has been added to thecalculation of the girth flanges. The calculation method is according to TEMARGP-RCB-11.7

2. The bolts data table has been updated with:- addition of the bolts as per DIN 2510- addition of the bolt hole diameter for girth flanges and floating flangesThe calculation subroutines for girth flanges and floating flanges have beenrevised accordingly.

3. The gaskets data table has been updated to insert the AD-MERKBLATT gaskets.The calculation subroutines for girth flanges and floating flanges have beenrevised accordingly.

4. The stiffening ring data table has been updated to insert the quota Xg (baricenterdistance from the ring vertical mid line)

5. Self energizing gasket has been added to the gasket table.The girth flanges calculation subroutine has been updated to avoid calculationcrash when using this type of gaskets.

6. The yield strength values vs temperature have been added to the material changesquantities.

7. The problems due to the resizing of the forms to comply with the screenresolution have been fixed. The program now behaves correctely for screenresolution of 800x600 and above.

8. For safety reasons the ESL key management has been updated. The program ESLin the group of service programs provides for several functions to manages thekey.

9. The unit N/mm has been added to the spring rate quantity in the units system file.10. The system S.I. has been modified selecting N/mm for the spring rate quantity.11. For the following materials the yield strength values vs temperature have been

revised:- A 193 B7- A 193 B16- A 320 B8 Cl 1- A 320 L7The values of the yield strength have been taken from the table Y.3 of ASME IIPart D addenda 1999.

12. A control has been added to the program to alert the user when a standard flangewhose values are not stored in database is selected.



MT-VESS Revision 7.05 (October 2000)

1. The printout header can be customized with the user name.2. The program revision has been added on the printout header and on the program

bar in the input data screen.3. The help on line has been added to the program.

The help can be opened from the “help” item on the menu bar or pushing

the F1 button on all the input fields of the program

MT-VESS Revision 7.04 (February 2000)

1. The following new materials have been added to the material archive:- SPH 235 EN 10207 7341/1991- SPH 265 EN 10207 7381/1991- SPHL 275 EN 10207 7401/1991- P235GH EN 10208-2 7361/1992- P265GH EN 10208-2 7061/1992- P295GH EN 10208-2 7441/1992- P355GH EN 10208-2 7081/1992- P275N EN 10208-3 7091/1992- P275NH EN 10208-3 7101/1992- P275NL1 EN 10208-3 7111/1992- P275NL2 EN 10208-3 7121/1992- P355N EN 10208-3 7131/1992- P355NH EN 10208-3 7141/1992- P355NL1 EN 10208-3 7151/1992- P355NL2 EN 10208-3 7161/1992- P-CU-DHP UNI 3310 H4 1725/1981- H II DIN 17155 5381/1959- St 35.8 DIN 17175 5135/1959

2. The conversion factor for the thermal expansion coefficient from in/in°F tomm/mm°C has been fixed.

3. a flag as been added to the material classes to show that some materials of theclass have been changed.

4. The nozzle inside diameter has been added to the nozzles fields to allow thespecification of non standard nozzles.This value, if any, will prevail on the nominal diameter of standard nozzle and thenozzle will be designed from plate.

5. The program has been revised to fix the problems arised with the management ofthe third and fourth drawing languages.

6. The General Notes program has been updated to manage the third and fourthlanguage.

7. A warning message has been added when the elevation specified for the internal ishigher than the vessel heigh.

8. Some minor bugs have been fixed.



MT-VESS Revision 7.03 (January 2000)

1. All the ASME materials have been revised according to the ASME II – PART Daddenda 1999. All the revised materials have the revision year 1999.

2. The safety factors related to the tensile strength have been modified from 4. To3.5 in the calculation of the allowable stresses according to ASME to comply withthe allowable of the addenda 1999.

3. The coefficient for the calculation of the hydraulic test pressure has been changedfrom 1.5 to 1.3 according to the ASME addenda 1999.

4. The coefficient for the calculation of the pneumatic pressure has been changedfrom 1.25 to 1.1 according to the ASME addenda 1999.

5. A new filter has been added to materials selection allowing to show only the lastrevision of the materials.

6. A control on the international setting has been added to the program to check thedecimal separator. The user can set the decimal separator as decimal point fromwithin the program. The change can be permanent or temporary depending on theuser choise.

7. The exposure zone A has been taken out from the zone index of UBC ’94 windcode. This zone is not provided by the code.

8. The slenderness coefficient has been taken out from the wind code CNR 82. Thiscoefficient is not used by the code.

9. The program crash due to the support cancelling has been fixed.10. The program crash in case of skirt bolts specified in input has been fixed.

An additional control has been put to the program to check that both the numberand size of bolts is specified.

11. The drawing of the nozzles circumferential view has been revised to avoid, forwhat is possible, overlapping of nozzles marks.

12. The quota of the Appendix axis to the vessel bottom refence line has been addedto the drawing.

13. The direction of the Intermediate heads in horizontal vessels has been fixed.14. Some minor bugs have been fixed.

MT-VESS Revision 7.02 (September 1999)

1. The drawing sheets have been completely redesigned.2. The gasket table has been ported on external file and can be customized by the

user.3. The nozzles database has been ported on external file and can be customiìzed by

the user.4. The user manual has been rewritten to complay with the new version of the

program.

NOTICE!!!

This is the first revision of the program running under

WINDOWS 95 / NT



Due to the many improvements to the program, the old input files

are no more compatible with the new program version. Old

calculations must be, then, reentered.

MT-VESS Revision 5.07 (September 1998)

1. The thickness of the skirt base ring specified in input has been fixed.2. The f factor in the girth flanges calculation has been optimized to have a lower

bolts circle diameter.3. The material SB-575 (HASTELLOY C-276) has been added to the materials

databank with the code 2901.4. Overwriting of the material revision date has been fixed.5. The material revision code has been changed to be compliant with the year 2000.6. The wind/earthquake code description has been fixed in the vessel output.7. In the calculation of conical section for ASME, the distance of reinforcing area

for cones without knuckles has been uptodated according to ASME VIII.1 par.1.5.d/1.5.e.

MT-VESS Revision 5.06 (February 1998)

1. An error related to the definition of welded flat heads has been fixed.2. A check on nozzle elevation above the reference line has been added to avoid

overcoming of the vessel maximum height.3. The diagnostic related to the brackets calculation has been improved in order to be

more detailed.4. Welded flat heads have been added to the vessel drawing.5. The vessel drawing scale has been modified to take into account for brackets

projection.6. A check as been added to the input datasheet to force the specification of the joint

efficiency.7. Support grates have been added to the packing drawing.8. The drawing of the demister has been improved.9. In the nozzle input datasheet the last input data are kept memorized.10. The asbestos has been canceled from all the gaskets description.

MT-VESS Revision 5.05 (December 1997)

1. Different drawing scales have been se up for the vessel length and the vesseldiameter in order to enlarge the vessel drawing.

2. The element diameter is kept memorized in order to avoid diameter specificationon all vessel elements.

3. Some bugs have been fixed.4. The nozzles nominal diameter in inches has been introduced in the list of nominal

diameter5. The program has been corrected to allow running under the DOS window of

WINDOWS 95.



MT-VESS Revision 5.04(September 1997)

1. The girth flanges calculation has been modified to comply with the severalcalculation conditions allowed by the program.

2. The vessel drawing has been widely revised:. The reference numbers of the vessel sections have been rearranged to avoid

overwriting.. The drawing of girth flanges has been fixed.. The nozzle orientation schema has been revised to avoid overwriting.. The drawing of vertical vessels has been enlarged in order to use all the

available space.. A table showing the material class of each section has been added to the vessel

drawing.3. A bug in the calculation of stresses due to wind and earthquake has been fixed.4. The allowable stress of anchor bolts has benn changed to 10.55 Kg/mm2

5. The wind calculation according to ASCE 7-93 has been introduced.6. The earthquake calculation according to UBC 1994 has been introduced.7. The girth flanges subroutine has been optimized for high pressure calculation.

MT-VESS Revision 5.03(March 1997)

1. The possibility to force brackets dimensions has been introduced in the bracketsdata screen. All the subroutines involved have been modified accordingly.

2. Controlls on the valve distillation trays input data have been introduced in orderto force the user to specify the number of trays and the trays spacing.

3. The allowable stress code for ASME calculation has been corrected.4. Some bugs have been fixed.

MT-VESS Revision 5.02 (October 1996)

1. The program has been completely revised to allow running from differentdirectories.

2. The input phase has been completely revised and the functions of inserting,selecting, copying and deleting input files has been introduced.

3. The possibility to force the number and size of anchor bolts and the base ring hasbeen added to the skirt input.

4. The unit weight for packing, inerts and catalyst can be specified in input. If giventhis value overrides the one set per default by the program.

NOTICE!!!The input/output file format of the vessels has been changed .Old input files generated with the version 5.01 must be modified with the programVESUPG.EXE to be read by the new version 5.02 of the program.



MT-VESS Revision 5.01 (March 1996)

1. The management of input data related to Elements, Nozzles and Internals hasbeen modified in order to know at a glance how many parts are present in thevessel.

2. The codes for the external pressure calculation have been added to the generalquantities. These codes apply to all the vessel elements unless they are modifiedat level of singular element.

3. The maximum stiffening rings number in the external pressure calculation hasbeen replaced by the minimum distance between adjacent rings.

4. The help function related to the rating and nominal diameter has been added to thenozzle data screen so to make easier the nozzles data input.

5. The results printout on disk are now stored in the file NAME.PRN where NAMEis the filename of the calculation; so every calculation is stored now apart.

6. Lower case letters can be used when answering the program question Y/N.7. Nozzles definition and positioning on the drawing has been completely revised

and implemented.8. The following materials have been added to the materials database:

1131 FE E 390 KW UNI 7382-751132 FE 35-1 UNI 663-681133 FE 410 KW UNI 7660-771135 FE 35-2 UNI 663-681142 FE 45-1 UNI 663-68


MT-VESS Revision 5.00 (November 1995)

1. General revision of the ASTM materials to keep the Data Bank updated with the1995 Edition of the ASME Code.

2. General revision of the ASME charts for vacuum to keep the Data Bank updatedwith the 1995 Edition of the ASME Code. All the ASME charts that was missingin the program have been introduced.


1. The trays input specification has been changed to allow the specification of all thetrays pack independently from the column elements subdivision. The elevation ofthe first tray of the pack is now given from the vessel bottom reference line andthe number of the trays is the total number of the trays belonging to the pack. Theprogram provides for the correct distribution of the trays over the singularelements.



2. The selection of the valve trays type has been greatly simplified allowing now togive only the number of passes (1, 2, 3, 4). The program provides for thedefinition and for the positioning of the different trays types in case of 2 and 4passes.

3. The distance of the upper skirt section has been corrected on the vessel drawing.4. The drawing of the valve trays with three and four passes has been added to the

column drawing.



1. A control has been put in the program to check the congruency between the vesselposition and the vessel support.

2. The spherical head positioning on the vessel drawing has been corrected.The concavity was reversed for type 2 heads.

3. The specific gravity of the insulation material has been inserted in the input datascreen.The value defaults to 300 Kg/m3 if not specified.

4. The table of LOADING DATA on the sheet 1 of the vessel drawing has beenmodified to allow the writing of numbers bigger than 99999.

5. The field “service” on the table CONNECTIONS of the sheet 1 of the vesseldrawing has been corrected to avoid characters overwriting.

MT-VESS Revision 4.01(June 1995)

1. The display of error after the initial vessel check has been introduced to allow theerror correction.

2. The address of the field “MAX DIAM.FOR MAT.L SELECT.” related to thesecond class on the screen 1ST MISCELL has been corrected.

3. The default values have been shown on the input data screens.4. The filename management has been changed.

Only the name can now be specified and the program automatically insert theextension PVI.In this way it is easier to recognize the input files of the program MT-VES.

CAUTION! Due to the change in filename management, the old filenames must be

renamed as follows:

REN old_name old_name.pvi

5. The filename is now reprinted on the page heading of the calculation results.



6. When the earthquake is specified, the program checks that the sismic probabilitycoefficient is specified.

7. On the nozzle input data sheet the program check that the “NOZZLEREF.ELEMENT” or the “ELEVATION ABOVE VESSEL BOTTOMREF.LINE” or both are specified.

8. A congruency check has been inserted so that if the “NOZZLE REF.ELEMENT”and the “ELEVATION ABOVE VESSEL BOTTOM REF.LINE” are bothspecified the latter will apply.

9. The drawing has been revised with reference to the INTERMEDIATE elementsand to the NOZZLES positioning.

10. The vessel external surface on the first drawing sheet has been corrected.11. The INTERNALS quotas on the second drawing sheet has been corrected.

mt-vess revision history mt-vess revision 3.3.0 … · 2011-07-15 · mt-vess revision history...

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