Is the hydraulic test of valves related to their operating pressure?
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Dear experts, what is the ratio of the hydraulic test pressure for valves to their operating pressure?»
It is generally 1.5 times, but it depends on the operating temperature of the valve; if the temperature is high, the operating temperature must also be taken into account.
Yes, the usual pressure test is 1.5 times the design pressure. The effects of low and high temperatures also need to be considered.
To be precise, the test pressures are divided into shell test pressure and sealing test pressure. According to the standards, the shell test pressure is 1.5 times the nominal pressure at 38 degrees; the high-pressure sealing test and high-pressure operation pressure are 1.1 times the nominal pressure at 38 degrees. The low-pressure sealing test and low-pressure operation pressure range from 0.5 to 0.7 MPa. The sealing test pressure for butterfly valves is 1.1 times the rated pressure difference, while the sealing test pressure for check valves is the nominal pressure at 38 degrees