The ASME Tubesheets module is based on the ASME Code Section VIII Division 1 part UHX. This module will also compute loads on the tubes and compare them to their allowable loads per the appropriate equation in Appendix A. Gasketed geometries for both fixed, floating and U-tube exchangers are also analyzed as well as the thickness of the flanged extension (the TEMA equation has been used). This module is good for both square or rectangular tube patterns.
When this module is executed it will display the output including equations for a given input. Afterwards, CodeCalc will iterate for the required thickness of the tubesheet. The shell side and tubeside corrosion allowances will then be added to these final results. CodeCalc also performs the plasticity calculations for fixed tubesheets if high discontinuity stresses exist at the attachment between the tubesheet and shell or channel. CodeCalc contains all of the graphs and functions that appear in section UHX.
The software analyzes all the load cases as per the section UHX, which includes various combinations of pressure and temperature, in both the uncorroded and corroded (if specified) conditions. A summary table is provided at the end of the output. User can choose to view the detailed printout of any load case.
The software can also analyze a thick expansion joint attached to a fixed tubesheet. The expansion joint spring rate and stresses are computed per TEMA standard. The actual stresses are then compared with the allowables provided in ASME Sec. VIII Div. 1, Appendix 5 to check the joint's adequacy.
