What I've come up with is that B31.3 paragraph 304.5 says for flat blinds with large openings fall under Boiler and Pressure Vessel code Section VIII Div 1, Appendix 2. There is a case for butt welding a flange to a nozzle, so I'm thinking at can be done and still be code compliant once the...
Hello,
Does anyone know if B31.3 or B16.5 will allow me to weld onto a blind flange for the purposes of hot tapping. I'd like to weld a 20" weldolet onto a 24" blind flange and then install a 20" valve and hot-tap the 24" blind. Shutting down the process will cost about $1,000,000 so that's...
