Hello there,We have a U-band shell-and-tube heat-exchanger:Diameter of the case (shell): D = 1000 mmTube size: 20x2Tube pitch (a distance between tubes): t = 26 mmPressure in the tube space: 0,6 N/mm^2 (Newton per square millimetre)Intertubular pressure: 2,5 N/mm^2Temperature of the case: 200 CTubes and case are made from carbon steel.The above parameters are found in the technological calculation, which includes thermal and hydraulic calculation. That part is quite difficult, from my view. In this example we will provide mechanical (strength) calculation. The purpose of it is to ensure that all kind of forces acted to the heat-exchanger can guarantee proper and safe operation.N.B.I used Microsoft Word 2007 for formulas. If you know a better software for it let me know.Let's calculate the thickness of the tube-sheet plate. The calculation is held on the intertubular maximum pressure:
Checking the reliability of flaring (bead forming):
Stengh to per perimeter unit of the plate (of tubesheet):
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Thank you for sharing this Xkalibur. You probably also know that in a u-tube exchanger the tubesheet will be a little bit thicker than a floating head exchanger of the same size, pressure and tube count. That all has to do with pressure calculations. Very few people I know can still do these by hand and mostly rely on a computer.
I will also add to your valuable topic that in the US we now have a calculation to do involving several different cases (called UHX calculations) that must be performed Under ASME Code. In the past our tubesheet calculations were based on TEMA (Tubular Exchanger Manufacturers Association) requirements. Now that is superseded by the ASME requirement.
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I will also add to your valuable topic that in the US we now have a calculation to do involving several different cases (called UHX calculations) that must be performed Under ASME Code. In the past our tubesheet calculations were based on TEMA (Tubular Exchanger Manufacturers Association) requirements. Now that is superseded by the ASME requirement.