dude get a glass piece bowl and all. stop fucking killing yourself yo uclearly know its detrimental to your health. is it worth it to shave off years of your life becaus eof being ignorant just to get high and cough like a bitch?
i'd just stop using that shit just to be safe. and the whole aluminum thing is that it's safe for like one use but foil wears away and you dont want to inhale little foil chunks... solid aluminum is completely different.
I would guess that the pipes for sale are okay because they have zinc coating, and maybe the one you're smoking from is dangerous because it's just pure steel (I'm assuming).
] Does a pipe get hot enought to cause this http://prtl.uhcl.edu/portal/page/portal/RSK/Safety/Tab/Metal Fume Fever.pdf