I have created a new model using ROHR2 31.2a using ASME B31.1 as stress code.
Now I see 2 SE equations, one without liberal stress and one with liberal stress.
Here is an extract from the stress analysis:
The one without the liberal stress is overstressed.Pt 11 Line 1 v Da= 219.1 mm s= 7.1 mm (TFS ) Butt welding tee
Line 1 n Da= 219.1 mm s= 7.1 mm
Line 2 n Da= 168.3 mm s= 5.6 mm
Na Gl P S(P) Ma Mb,c i S(M) S-sum S-allw Util
(bar)(N/mm2) (kNm) (kNm) (N/mm2)(N/mm2)(N/mm2) (%)
01 SL v 25.0 17.4 1.313 2.6 10.4 27.8 106.2 26
01 SL n 25.0 17.4 1.176 2.6 9.3 26.8 106.2 25
01 SL n 25.0 16.9 0.249 2.6 3.2 20.2 81.9 25
02 SE v 21.555 2.6 227.9 227.9 201.6 113*
02 SE n 15.433 2.6 163.2 163.2 201.6 81
02 SE n 9.220 2.6 160.3 160.3 195.5 82
03 SE v 21.555 2.6 227.9 227.9 280.0 81
03 SE n 15.433 2.6 163.2 163.2 281.0 58
03 SE n 9.220 2.6 160.3 160.3 257.2 62
04 SOL v 25.0 17.4 1.313 0.834 2.6 17.0 34.5 122.2 28
04 SOL n 25.0 17.4 1.176 0.646 2.6 14.5 31.9 122.2 26
04 SOL n 25.0 16.9 0.249 0.972 2.6 15.9 32.8 94.2 3
Do I have to consider this equation?
Does the new edition of ASME requires this calculation?
Best regards