Selection of reboiler tube sheet material?
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Heat exchange equipment: The thickness of the tube sheet is S=50 mm. When selecting the material for the tube sheet, should stainless steel sheets be used or stainless steel forgings? Are there any standards or specifications that can be referred to? Thanks!!☆⌒(*＾-゜)v
Stainless steel sheets can be used, as well as stainless steel forgings; composite sheets or carbon steel forgings welded on top can also be employed… The thickness is determined by the material specified in the strength calculations, rather than being guessed based on thickness alone. Some stainless steel sheets and forgings have the same allowable stress
The main factor considered when deciding whether to use forgings or sheets to manufacture tube sheets is the manufacturing cost. The older version of GB151 imposed certain restrictions on using plates as tube sheets, and the new version of the standard has revised these restrictions.
In this case, considering cost-effectiveness, composite plate forgings are generally used
Consider the surface condition and thickness; use plates whenever possible, and conduct a cost comparison. Generally, forged parts are more expensive
This needs to be considered comprehensively – what medium? Whether it is corrosive, operating pressure, operating temperature, etc., all need to be taken into consideration, as well as cost – the economical option
As long as the tube sheet does not require forgings as specified in GB/T151, sheets can be used; however, due to the low utilization rate of sheets and the longer delivery time, their overall cost is not necessarily lower than that of forgings.