The last time I ran gas line I chose black iron(steel) over copper because of the cost. Black iron is an approved pipe for all gas piping, air and is very easy to work with. The use of a hose with braided metal covering is suggested around hot metal as it doesn't take much to burn through a neoprene hose. Propane is heavier then air so have all of your electrical outlet and switches high on the wall just encase of an overnight leak. Yes I know your supposed to turn it off but sometimes one forgets. Have adequate cross ventilation and if you smell gas don't flip on a light switch.
