When conducting a hydraulic test on the equipment, the hydraulic pressure is generally set at 1.25 times the design pressure; under what circumstances is it necessary to multiply by the temperature deviation factor?
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When conducting a hydraulic test on the equipment, the hydraulic pressure is generally set at 1.25 times the design pressure; under what circumstances is it necessary to multiply by the temperature deviation factor?
It is necessary to take this into consideration when the ratio of the allowable stress of the material at room temperature to its allowable stress at the design temperature is greater than 1. The specific values to be used depend on the provisions of GB150.
A hydrostatic test simulates an overpressure test at the design temperature under normal temperature conditions. Therefore, a temperature correction factor must be introduced; this factor needs to be taken into account for pressure vessels under internal pressure, while it is not necessary for those under external pressure only
For this, it is necessary to check the allowable stress of the material specified in GB150.2