Thank you for responding to my earlier question. Upon further digging, I read that UG-20 gives you exception and allows you to use A105 flanges, purchased as forged, down to -20F without impact testing if the thickness (as defined in Fig UCS-66.2)is below 1/2". That is to say if an ordinary A105...
Does the new 2019 update of ASME Sect VIII Div 1 limit the MDMT of as forged B16.5 A105 flanges without impact testing to 0F (and not down to -20F) or does the restriction only apply to the nozzle section of long welding neck flanges? Thank you.
