The point is that I have one non-ASME material for plates (BS-1501-26A). I need to calculate allowable stress from tensile and yield strengths according to ASME 1971 criteria (Su and Sy are available). If allowable stress for old and new design condition remains unchanged we could rerate the...
According to ASME VIII div 1 (1983) allowable stress values are calculated considering the lower of room-temperature tensile strength divided by 4 and yield strength at temperature divided by 1.5.
I have to validate some heat exchangers built in 1974 and designed according to ASME VIII div 1...