The calculation of fixed tubesheet exchangers according to ASME Section VIII division1, Clause UHX. The calculation rules are far more complicated in fixed tubesheet heat exchangers (TEMA types BxM, AxL, NxN ), where also the stresses due to the differential thermal expansion between shell and tubes shall be considered,.
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ASME® UHX and TEMA Heat Exchanger Software COMPRESS software performs ASME UHX and TEMA tubesheet design, expansion joint FEA, drawings and cost estimates, HTRI shell and tube heat exchanger import…
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The heat exchanger option in COMPRESS helps you with heat exchanger design calculations based on ASME UHX and TEMA mechanical design guidelines. Important features are - ASME UHX and TEMA tubesheet thickness calculations and reports
ASME UHX Design. This exchanger has been designed in accordance with Part UHX of ASME Section VIII Division I. ASME requires analysis of seven separate load cases on fixed tubesheet exchangers. The cases are made up using all combinations of tube side and shell side design pressures and loadings due to thermal expansion. ASME UHX design is mandatory and replaces the previously used TEMA …
The purpose of PTB-7 is to justify & provide technical criteria for the rules of part UHX Section VIII Division 1 which is devoted to the design of u-tube, fixed & floating head tubesheet heat exchangers. It also applies to the paragraph 4.18 of section VIII, division 2, 2013 edition.
The Part UHX rules consider the tubesheet, shell, channel, and tube stresses to be secondary stresses under the action of thermal load. It has been a long, standing practice of TEMA to divide the loads resulting from thermal expansion by a factor of two, including the tube loads.
ASME UHX and TEMA Heat Exchanger Mechanical Design If you need ASME UHX and TEMA mechanical design calculations, drawings and reports then the COMPRESS heat exchanger option is for you. Up to eight design conditions can be investigated for fixed, u-tube, kettle and floating tubesheet style exchangers.
The heat exchanger was analyzed for different loading conditions as per UHX 13.4 using Finite Element Analysis in ANSYS APDL Solver. Stress Linearization has been carried out at various locations. The tube to tubesheet weld qualifications were performed for the weld.