What does pressure difference refer to in the calculation formula for heat exchanger tube rupture according to HG20570.2-1995?
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Question: Regarding the pressure difference in the calculation formula for heat exchanger tube failure as specified in HG20570.2-1995, what do the pressures on the high-pressure side and the low-pressure side refer to? Design pressure on both sides? Or is it the operating pressure on the high-pressure side, and the release pressure on the low-pressure side?
The pressure difference used in the calculations for heat exchanger tube failure as specified in HG20570.2-1995 Code for Fire Protection Design of Chemical Enterprises, Part 2: Atmospheric and Pressured Equipment, generally refers to the pressure difference between the high-pressure side and the low-pressure side within the heat exchanger. In this context, the high-pressure side generally refers to the side with the higher operating pressure inside the heat exchanger, while the low-pressure side refers to the side with the relatively lower operating pressure. The pressure difference is calculated to assess the pressure shock that may occur on the low-pressure side in the event of a rupture in the heat exchanger tubes. Regarding the pressures on the high-voltage and low-voltage sides, in the calculation process, the design pressures of these two sides are generally used as a basis for the calculations. The design pressure refers to the maximum pressure that a device is intended to withstand during its design, and this is usually higher than the normal operating pressure. In some cases, calculations may also be based on the operating pressure on the high-pressure side during actual operation, as well as the lowest possible pressure on the low-pressure side (such as the relief pressure or the minimum system pressure). It is recommended that you consult the relevant specifications and associated engineering technical documents to determine the appropriate pressure difference calculation method and the required parameters. In cases involving safety assessments or design reviews, it is also necessary to comply with relevant industry standards and regulatory requirements. .
Thank you to the person above; the standards only mention the pressure difference, without specifying exactly what kind of pressure it is. I’ve also seen it mentioned before that it is the maximum operating pressure on the high-pressure side, and the relief pressure on the low-pressure side. So I’ve been confused about this issue.