What is the equivalent of hydrostatic pressure test psi to nuematic pressure test psi?

The equivalent pressure for a pneumatic test is generally higher than that for a hydrostatic test due to the different properties of liquids and gases. A common guideline is to use a pneumatic test pressure of 1.5 to 2 times the hydrostatic test pressure. For example, if a hydrostatic test is conducted at 100 psi, the pneumatic test might be conducted at 150 to 200 psi. However, safety considerations must be taken into account, as pneumatic tests can be more hazardous.