[ww]

Thanks for your comments 11echo. I agree that in most situations the 1/8″ would be inconsequential but there are times when it matters. For example, if you have a run of fittings welded together with no pup pieces (as often occurs at control valve stations), and you accumulate 1/8″ at each weld, you could end up with a +3/4″ or more difference. This can make a real difference when you’re trying to fit piping into a tight spot, or even more so, when your new piping has to align with existing piping (eg a tie-in at an existing flange).

Wayne