Why SA-182 F6a Class3 or Class4 is not included in ASME II D

[Chinshin]

Hello everyone,
I am looking for the allowable stress at elevated temperature for SA-182 F6a Class3 or Class4, but I found they are not included in related tables in ASME II D (Class1 or class2 are included though).
Does anybody know the reason for that? Or where can I find those data?
Thank you in advance.
Tang

 

[XL83NL]

Because so far, probably no one bothered requested it's application for the ASME BPV, or because in the past it was found it cant be used under the BPV. I suggest you write a technical inquiry to the BPV Code Committee for section II. Review page xviii of Section II part D, and mandatory appendix 5 of section II part D.