Many believe 'flange' is the correct spelling, but it's simply a misuse of the glorious English language. "Flange" is actually spelt, "PFLANGE," with a silent P.
You know it makes sense.
I was the first person to use it too. Anybody who denies that is simply a misuse of grammar jibing, misspelling fool! And hell YOU DON'T WANNA BE A MISUSE OF GRAMMAR JIBING, MISSPELLING FOOL!!!