API 570 Calculation

[Corgas]

For the corrosion half-life calculation, I'm calculating MAWP = 2SEt/D.

Question : "S" value corresponds to current ASME B31.3 value or value from 1973 code edition(when it was built).

Thanks,

Corgas

 

[PAN]

This may be the same issue...

http://www.eng-tips.com/viewthread.cfm?qid=232000&page=21