We have a Sect VIII, Div 2. vessel that requires S31803 duplex material for the fittings (elbows, reducers). Our supplier wants to provide SA-815 for Div. 2 service. We have scoured the Code, Interpretations, and Code Cases for any hint that SA-815 material is permitted in Div. 2 construction...
Paragraph 4-137 of ASME Section VIII, Division 2, Appendix 4 states that "the algebraic sum of the the three primary principal stresses (sigma1+sigma2+sigma3) shall not exceed four times the tabulated value of Sm."
I have searched the internet extensively and found papers and aticles on the...
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I need a little help with the background on the developement of the R value used in seismic calculations. Has the R-value ever had a rational basis? That is, has it be quantified and validated...
