It's not really a recognized descriptor, it's just Dogfish Head's name for that particular beer. If you really wanted to, yes, you could make your own 180 Minute IPA. But it's referring to the amount of time in which it's continuously hopped, not just to the boil time. It's definitely kind of an IPA thing.... So a 90 Minute Stout wouldn't make much sense unless you continuously hopped your stout for 90 minutes, which would be weird and wayyyy off of style.
But in the end, it's your beer, call it what you want! Like
Hard Cock, for example.
As far as a
double/dubbel vs a
triple/tripel, those are Trappist Belgian styles, and their name originates from the names the monks originally used.
A
doppelbock is something completely different ... just because it has double in the name means nothing, in relation to a Dubbel.