Thank you for the reply racookpe1978. In this case the vessel was supplied with a short NPS 1/2 connection for thermal over pressure protection. The required thermal relief capacity for this vessel was calculated to be ~10 USGPM, and both a 1/2" inlet or 3/4" inlet RV can handle this capacity...
I was wondering if anyone had experience with ASME Section VIII Div 1 UG-135 (b)(1) and the minimum required pipe/fitting area between an ASME Section VIII Vessel and its thermal relief valve. UG-135 (b)(1) states:
The opening through all pipe, fittings and nonreclosing pressure relief device...
