@MJCronin : The weldment has not begun yet but from experience I'm expecting this will be a problematic assembly due to severe alignment tolerances.
@bcd : thanks a lot, that was exactly what I was looking for. ASME B16.5-2013 - paragraph 7.4 had the info you mentionned : Flange Thickness for...
After welding 2x slip-on flange 18", CL 150 on both straight end of a 18" Tee, there will be misalignment. Normally this is not a problem but for the current project it is problematic. To correct the misalignment, the flanges would be machined (see image in attachment).
My question is, what...