MT-EXCH

MECHANICAL DESIGN OF SHELL & TUBES HEAT EXCHANGERS
The software program MT-EXCH allows the mechanical design/rating and the stability check of Shell & Tubes Heat Exchangers (TEMA).
The program runs under WINDOWS 9x/NT/2000/XP operating systems and includes the following main features:
  • Thickness determination and geometrical dimensioning of all exchangers components
  • Assembling and geometrical dimensioning of the exchanger as a whole
    		•

    The Version 3.2.0 is the last one released. For release contents click for Ver. 3.2.0 List.

    MT-EXCH - Documentation

    ALLOWED CODES
    ASME VIII division 1(U.S.A.)
    AD-MERKBLATT(Germany) - Harmonized with the PED directive
    ISPESL - VSR(Italy) - Harmonized with the PED directive
    EN13445(European Code)
    TEMA(U.S.A.)
    R, C, B classes raccomandations are applied when procedures
    are not covered by Codes.
    PD5500 (App.G)(U.K.) (brackets and local loads)

    EXCHANGERS TYPES
    With reference to the TEMA nomenclature, the program MT-EXCH is able to calculate exchangers including any allowed combination of the following main components:
    • Channel (A/B/N)
    • Shell (E/F/G/H/J/K)
    • Rear End (L/M/N/S/T/U)
    Both Channel and Rear End can be conical.

    EXCHANGER COMPONENTS
    All components that are part of an exchanger are dimensioned by the program:
    • Welded Formed Heads (elliptical, spherical, torispherical)
    • Flat Flanged Heads
    • Shell Barrels
    • Conical Sections
    • Girth Flanges
    • Tubesheets
    • Expansion Joints
    • Floating Head (flange and cover)
    • Nozzles
    SUPPORTS
    • Saddles (for horizontal exchangers)
    • Brackets (for vertical exchangers)
    NOZZLES
    • Nominal Diameters from 10 to 1500 mm (from 3/8" to 60")
    • Automatic Selection of the construction material from pipe or shell
    • Automatic verification of the nozzle hole and reinforcement calculation

    DATA BANKS
    The software package is based on large, user modifiable, data banks:
    Materialsmechanical properties of over 350 ASME/UNI/EUROMARK materials
    Nozzles and Flanges(ASA, UNI)
    Gaskets(ASME/VSR, AD-MERKBLATT)
    ASME Charts for External Pressure
    Standard SupportsSaddles, Brackets
    Stiffening RingsAISC, EUROPEAN
    BOLTSANSI B18.22, UNI/ISO, DIN 2510


    ANALYSIS CAPABILITIES
    •  
    		 Check of stresses caused by internal pressure
    All the exchanger components, shell and tubes sides, are dimensioned for internal pressure and hydraulic test.
    The components who are in contact with both fluids (shell and tube) are automatically checked for pressure acting on the external side.
    •  
    		 Geometrical Dimensioning of the Exchanger.
    The program provides for a comprehensive geometrical dimensioning, incuding all quotas, distances, and dimensions of each component and of the exchanger as a whole.
    Referencing to well defined and universally accepted constructive Standards, included in MT-EXCH, the rated Setting Plan of the exchanger is automatically produced.
    •  
    		 Weight Calculation.
    The weight of each component is calculated and the following additional items are provided:
    • Empty weight of the exchanger
    • Weight of the tubes bundle
    • Weight of the exchanger full of water
    •  
    		 Stability check for loads caused by external pressure.
    To contrast the external pressure the user can choice between stiffening rings insertion, thickness increase or a combination of both.
    •  
    		 Stability check against combination of different loads: Equipment weight, wind loads, earthquake, user specified forces and/or moments. For Wind and Hearthquake the user can choice between the following Codes:
    Wind Codes Hearthquake Codes
    ANSI ANSI 1982
    ASCE 7-95 ASCE 7-95
    CNR 1982 CNR 1986
    CNR 1996
    NEIGE ET VENT PARASISMIQUE PS92
    BSI CP 3 UBC 1988
    UBC 1994 UBC 1994
    UBC 1997 UBC 1997
    The resultant Force and Moment are applied to supports for allowing the Stability Check and the calculation of loads acting on foundations.
    •  
    		 Supports positioning and stability check.
    • Saddles The check is carried out according to Zick method
    • Brackets The check is carried out according to Bijlaard/BS5500 method
    •  
    		 Tubes to Tebesheet Welding Analysis according to ASME VIII Div. 1 Para UW20.
    •  
    		 Check of tubes of the bundle according to the design Codes. For U tubes also the analysis relevant per TEMA RCB-2.31 e ASTM A556 can be performed.


    OUTPUTS
    The results of exchanger calculation consists of a tabular report, Exchanger Drawings, Bill of Materials and the Audit Reports Book.
    ASCII ReportAll relevant data of the excanger are printed out, including the results of numerical calculation and geometrical dimensioning.
    Example - PDF 26 Kb
    Bill of MaterialsAll components belonging to the exchanger under design are summarized in a table with dimensions, weights and number of items. The table can be viewed on screen, printed or exported as Excel file for further processing (Cost Estimates).
    Example - XLS 21 Kb
    DrawingsDrawings are automatically generated by MT-EXCH in three A3 sheets (a fourth sheet is added when cladding is provided on one or more components).
    Example - PDF 377 Kb
    Details on each sheet are as follows:
    •  
    		 1st Sheet - Tables related to:
    • Design data
    • Tube bundle data
    • Weights and Loads
    • Nozzles (Radial, Offset, Inclined) welding analysis included
    • General Notes
    • Reference Standards
    • Revisions
    • Materials
    •  
    		 2nd Sheet - Setting Plan and Nozzles Posizioning.
    The drawing is scaled in order to show the relative dimensions of the exchanger.
    The nozzles, also scaled and including reinforcing pad, if any, are shown both in longitudinal and circumferential views.Details for saddles base plate, both fixed and sliding, are shown on the same drawing for horizontal exchangers.
    •  
    		 3rd Sheet - Constructive drawing and baffles positioning.
    All the exchangers components are drawn with quotas and dimensions.
    Drawings can be generated in english or italian language (other languages using latin alphabet can be easily provided) and it is possible to choice between the following system of units:
    • Metric
    • English
    • Internazional Standard (S.I.)
    • User Defined
    Drawings are produced in DXF format for easy importing them in AUTOCAD, or in many other CAD programs which accept this very popular standard, for further enhancements.
    Audit Reports BookFor all the exchanger components datasheets including formulas and substitutions are shown on the screen and can be printed or saved on a file.
    The user can complement the data sheets automatically printed by the program with:
    • Cover Pages.
      The included Page Editor, also if simple, allows for an exhaustive text handling and for the insertion of file images in BMP, WMF, JPG formats.
    • Index of Contents.
      The program, if so requested, automatically produces an index with pages numbering referred to every component.

    Datasheets can be produced in English or Italian languages, selecting S.I. or English system of measurement units.

    Example - PDF 100 Kb


    IMPORTING THERMAL RATING DATA
    The MT-EXCH program allows the automatic importing of data coming from the thermal rating of the exchanger trough two different kinds of tools:
    • Direct Interface
    • Neutral File
    Direct Interface
    This is an interface developed by Micro Techno for directly addressing the outputs of a specific program.
    The interfaces actually available are:
    • Files *.dbo: Output Files of the H.T.R.I. Xist program for the thermal dimensioning of Shell&Tubes Heat Exchangers (HEAT TRANSFER RESEARCH Inc. - Houston, TX - U.S.A.)
    Neutral File
    The MT-EXCH program allows the automatic importing of data coming from the thermal rating of the exchanger, provided that such data are organized in a Neutral File (ASCII format). The file has to be generated by an external program before to start the MT-EXCH program.

    The Neutral File Format is freely available !!!
    MICRO TECHNO ENCOURAGES THERMAL RATING SOFTWARE DEVELOPERS TO INCLUDE THIS INTERFACE IN THEIR PACKAGES

    One of the programs that already allows for this kind of interface is the CC-THERM program by Chemstations Inc. (Houston, TX).


    OTHER INTERFACES
    The MT-EXCH program can read directly from the MT-LAYOUT files data related to the tubes of the bundle and OTL (Outside Tubes Limit) witout the need for manually reinputting these data.