Propane Piping ?

Chris Bryant wrote:
From NFPA 1192 "Standard on Recreation Vehicles" 2011 edition:

NFPA wrote:
Fittings for propane shall be wrought-iron, malleable iron, steel, or brass (containing less than 75% copper).

Thanks, ends debate on that IMO

I've got a 2008 copy. Anybody know where a newer copy of NFPA 1192 "Standard on Recreation Vehicles" in pdf form and most importantly free?

Thanks