Double Tubesheet Designs
If your process absolutely cannot tolerate mixing of the shell side and tube side fluids in a heat exchanger due to safety or process purity concerns, you may want to…
Category: ASME Code, TEMA and API Facts
Shell Length for Internal/External Pressure
When designing a cylindrical shell for internal pressure, the basic variables needed are the diameter, pressure, material allowable stress, and weld efficiency. The length of the shell is not a…
ASME Code Part UHX and TEMA
Part UHX of the ASME code includes design, fabrication, and inspection rules for shell and tube exchangers. Any parts of UHX that apply to a certain exchanger must be followed…
Seismic Design
Similar to our discussion of wind design last month, seismic forces should be considered in pressure vessel design. Earthquakes are rare, but if not properly accounted for, a pressure vessel…
Wind Design
UG-22 of Section VIII says that vessel designers must account for any and all expected loads on a vessel, in addition to the internal and external pressure loadings you might…
Dimensional Tolerances
The ASME code has surprisingly few dimensional tolerances. In fact, in section U-5, the Code states that tolerances are not fully addressed, and allowable tolerances should be based on engineering…
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