Welding issues of tube sheet in shell and tube heat exchangers
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Urgent! As shown in the figure: originally, the flange should be fitted onto the cylinder first, then the tube sheet and the cylinder should be welded together, and finally the flange should be welded. As a result, the workers didn’t understand the drawings and didn’t consult the designers; they welded a flange at the joint where the cylinder meets the tube sheet. They asked whether it would be possible to weld the cylinder to the tube sheet at the U-shaped stress relief groove inside the cylinder The design pressures for the shell side and tube side are 0.5/0.25 MPa respectively, with a temperature of up to 140 degrees Celsius.
Since the pressure and temperature in both the tube side and the shell side are not high, why is the thickness of the flange so large? Why is this design chosen?
The structure you designed is too special...
This post was last edited by zhangjuhua on 2017-5-21 at 13:37. I don’t quite understand it – why is the tube sheet 31.3? Is it because of the larger diameter, or is expansion jointing being used? It’s not very thick either. Is the groove a structure designed specifically for the type of medium or operating conditions? In that case, filling it in would change the structure; perhaps it’s feasible for ordinary media and operating conditions
First, weld the tube sheet to the shell; if necessary, grind the welds, and then fit the flanges to connect them to the shell. It seems there’s no distinction between thick and thin solid lines, and the direction of the crosshatching lines also seems a bit off
Plane off the flange and reinstall it