Relationship between flow rate and pressure during hydrotesting
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Dear Haiyou, does anyone know the relationship between flow rate and pressure changes during a hydraulic test of pipes? How is it calculated? For example, for a pipe with a DN200 diameter and a length of 300 meters, how many cubic meters of water are needed to increase the pressure from 2.0 MPa to 3.0 MPa (assuming a constant temperature and no leakage points)? Conversely, if the pipe pressure drops from 3.0 MPa to 2.0 MPa, how much water has leaked?
It’s not clear; it’s mainly affected by temperature. However, the amount of compression of water is so small that in the past, once the pressure was increased to its maximum, that was sufficient
If the pipe isn’t releasing water, just fill it with water; no more water can be added. It depends on the pump’s pressure-raising capacity; it has nothing to do with the water volume