calculate water volume needed for hydrotest
Hydrostatic Test Pressure Calculation Hydrostatic Test Pressure, P = 2St / D where, P S = Hydrostatic test pressure in psi = pipe wall. stress in psi. ASTM -50% of the specified minimum yield strength for austenitic alloy and stainless steel pipe JIS -60% of the specified minimum yield strength for austenitic alloy and stainless steel pipe. t D.