That is not the same as what you wrote.
But this is exactly the same as what CBC wrote (emphasis added):
unfortunately most places are not up to par.
And the procedure that
@moko talks about is time consuming and expensive. Often it is avoided for the risk of ruining expensive equipment.
I recall when I was a bochur I went with a friend to kasher a place in the Catskills for Pesach. We were told to kasher oven pans (which obviously required libun chamur). Needless to say, the pans were rendered unusable. IINM after one or two we were visited by a regional mashgiach who said there's no way the pans get kashered. Libun will ruin them, anything less is unacceptable. Pans are cheap. Fryers and other commercial cooking equipment is not. Certain types of equipment will require a trained technician to dismantle and reassemble.