The calculated thickness of the heat exchanger tube sheet is too thin; is it necessary to increase its thickness?
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The diameter of the shell in the fixed-tube-sheet heat exchanger is 600; the flanges for the equipment in the front tube box are specified to be 1 MPa class with a diameter of 43 mm. The calculated thickness of the tube sheet is 18 mm, which is thinner than 43×0.6=25.8. What should be done with such a result? Is it necessary to thicken the tube sheet?
Where is the 0.6 specified? There’s no such standard...
There is no 0.6 standard; it is a value indicated during SW6 calculations, and it should also be an empirical value
It’s not the case that the thicker the tube sheet, the better; if there is a large temperature difference, appropriate deformation can help release stress
After all, bolts need to be used, and the thickness should be increased; it shouldn’t differ too much from the thickness of the flange
0.6 was the figure used by older engineers; when there is a large difference in thickness, the rigidity issues that arise during bolt tightening need to be taken into account
If the tube sheet is not used as a flange and is not connected to any split diaphragm, there is no need to thicken the tube sheet. Unless the medium is highly hazardous, the tube sheet thickness shall be not less than the outer diameter of the heat exchange tubes as required by 151