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Tube to Tubesheet Joints: The Many Choices
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From ATI Wah Chang
After a decision has been made to use zirconium as the material of construction for a shell and tube heat exchanger, one must take into account the process design parameters and other considerations in order to obtain the optimum mechanical design for the specific application. One of the most important steps in the mechanical design process is determining the method of attachment for the tube-to-tubesheet joint. Many of the problems which have been experienced with zirconium shell and tube heat exchangers could have been avoided by giving more attention to the selection and design of the tube-to-tubesheet joint. Products & Services
Nonferrous metals and nonferrous alloys are not based on iron and include alloys of aluminum, copper, titanium, zinc, nickel, cobalt, tungsten, precious metals, refractory metals.
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Metal wire and strand has a round, flat, or shaped cross section. Products are usually less than 0.375" in diameter.
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Metals and alloys in the form of flat plates or metal plate stock.
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Metal sheet is metal or alloy stock supplied or available in the form of sheet or foil. Metal sheet has a thickness between 0.006" and 0.250", and is 24" (609.6 mm) or more in width.
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Metal strip is narrow, thin metal or alloy stock that is usually 0.187" (3/16 inch, 4.76 mm) or less in thickness and under 24 inches (609.6 mm) in width.
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Product Announcements
Topics of Interest
The tube-to-tubesheet joint is considered to be one of the most important and critical portions of tubular type heat exchangers. When reactive metal tubes, such as zirconium and titanium, are used in...
(Read More)
TEMA
Nomenclature
Shell and tube heat exchangers are designated by front head type, shell type, and rear head type as shown in Figures 1-4 and Table 1 from the Standards of Tubular Exchanger...
(Read More)
A Gulf Coast manufacturing unit has three heat exchangers in its reaction overhead off-gas system. All the heat exchangers are once-through condensers with carbon steel shells, zirconium tubes and...
(Read More)
Let us first determine the optimal heat exchanger: The superior heat exchanger is the one that provides the required performance, within design limitations at a minimal cost. In general, we will work...
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Nuclear Steam Generator (SG) service reliability and
longevity have been seriously affected worldwide by
corrosion at the tube-to-tubesheet joint expansion.
Current SG designs for new facilities and...
(Read More)
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