Regarding the error in the external pressure calculation for copper pipes in SW6
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Gentlemen! In sw6, a stuffing box type heat exchanger is selected for the structure, and T2 tubes are used as the heat exchange tubes; the following error occurs during the strength calculation. 1. The axial stress δt of the heat exchange tube is not up to standard ； 2. External pressure strain coefficient B curve temperature out of range ； The actual design temperature of 100°C is not high, but this situation occurs – how should it be handled? Has anyone else encountered this problem? Help! ! !
Send the design files next time we meet. 1. The allowable stress for T2 is really low – it’s only 25 MPa at 100°C. The calculations show that it does not meet the requirements; the structure needs to be modified. Perhaps increasing the number of heat exchange tubes could help? 2. According to JB/T4755-2006, the temperature on the T2 external pressure curve shall be ≤65℃. It is recommended to change the material