Hi all,

Why the ASME B31.3 Code doesn´t use the "Sy" factor (Specified Minimun Yield Strenght) for compare with the allowables stress for a A106 B Material? How can i do to compare the allowables strees when i use this material and code of reference?

How can i do to compare the allowables stress when the piping system have two type of materials?

Many thanks and regards!