The hydrostatic pressure test is a pressure and strength test of the components of a thermowell in accordance with the AD2000 data sheet HP30.
For the test, the thermowell is clamped into a test fixture and loaded at room temperature with a defined test pressure and duration (e.g. three minutes).
In general, one differentiates between external and internal pressure testing.
Typical test pressures are 1.5 times the nominal pressure of the flange with external pressure, or 500 bar with internal pressure.
The test is performed with water with a chloride content < 15 ppm. After passing the hydrostatic pressure test, the thermowell is marked with a “P”.
Author - carl Ellis