I have an SA-105 1-1\2" 300# RF WN Flange sch 10 (.109)
On the cert I have the elongation % result is 25.8
The basic min for 5/16 wall is 30.
The wall thk for this flange is around .109
For strip test , a deduction for each 1/32 decrease from the basic....... see table 3.
So tell me if I have this right
For .109 wall thick the elongation minimum would be.......20.2%

I also have a 16" cl 300 sch 40 (.500 wall thick) SA-105
The elongation % in 50mm on the cert is 26.65
This would be a std round 2 in the min elong is 22
correct

The more i look @ this the more im not sure how this works so i hope i can dicuss this with u all in depth.