I thank all the colleges who replied to my question concerned the lowest stress ratio for calculation of the test pressure value (fizza453, mk3223, prex). But to my mind, the HIGHEST ratio should be used. I think, the material which has the lowest stresses ratio is affected by the temperature...
Dear Sirs! Please, be so kind to give me an advice on the question: where can I find an explanation of the item UG-99(b) of the BPVC Sec. VIII Div. 1 requirement to use the LOWEST stress ratio for calculation of the hydrostatic test pressure value? Why not the HIGHEST ratio?
Please, don`t be...