Hello Mohammed,

You are quite right, the allowable used in the test calculation should be a function of the 'hydrotest' allowable stress as it appears in the material properties dialog. Depending on the selected Code and user options, the value could be 90% Sy, 95% Sy, 1.3*Sa, etc.

In fact this issue was very recently addressed and will be fixed in PV Elite 2017. Currently the allowable is based on the cold allowable stress which is conservative.