During strength expansion joining, when calculating the pulling force, whose area should be used?
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When conducting a strength expansion joint test on the tube ends of shell-and-tube heat exchangers to determine the pulling force, the value obtained through measurement represents the force. How can this value be converted into the required standard value in MPA? Which area should be used for this conversion: the area of the end face of the heat exchange tube, the area of the tube hole, or the area where the heat exchange tube meets the tube sheet? Could some expert give me some guidance?
It’s the area where the heat exchange tube meets the tube sheet.
Area = πdL, where d is the outer diameter of the heat exchange tube and L is the expansion joint length
Is there any introduction available? I’d like to learn more about it*
The original poster, please take a look at the formula for calculating tensile force in GB/T151
l is the expansion joint length between the heat exchange tube and the tube sheet, or the height of the weld leg