Hi,
Can somebody help me telling which is the underlaying concept that defines the allowables defined for ASME B31.11. I mean, why 80% for hoop stress, 54% for sustained, 72% for expansion, 88% for occassional and 90% for the equivalent tensile??
Thanks!.
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Patricio Alvarez
Alquimia Ingenieros.S.A.
Chile