Dears,

What is the allowable stress for B861/862 Gr 2H in ASME B31.3:2010 for varius temperatures ? I could not locate the same there. Titanium Grade 2 has 50/40 ksi as min Su/Sy at 20C, whereas grade 2H has 58/40 ksi as min Su/Sy at 20C. What is Su at temperaure for grade 2H ?

Is H class in Titanium is for pressure vessel application only?
If I get Su & Sy at temperature from Sec II D, can I use the same to infer the allowable stress for the same in B31.3 ?

What is the allowable stress the titanium piping users in PTA industries using since 2006 when grade 2H has been introduced in ASME ?

regards,

sam