I'm still hoping for an answer to a prior question..... Does anyone have experience welding a true socket-weld fitting like this to create an 90 elbow? It was designed to be TIG'd, but what if we soldered instead? Would it be "near sanitary" (does not have threads). Most folk seem to transition from tubing to NPT pipe fittings via a Swagelok compression fitting - only to return to tubing on the other side of the pipe fitting with yet another compression fitting. This way, we have zero compression fittings, no threads, and a near perfect connection that makes sure the tube ID matches the ID of the fitting itself. I'm just saying.... Swagman? Bobby? Wayne? Yuri? Bueller....?