LPG gas above ground, inside the walls of the house, should be run with black steel pipe. Some municipalities do allow galvanized pipe, but you should check with your local authority, before attempting to install the pipe. Underground from the tank to the connection at the house, can be flexible copper tubing. I would issue a severe warning not to attempt this yourself. If you have never run pipe before, hire a professional to perform the job. Make sure a permit is bought, and all inspections are performed, by the local authority. Your safety, and the safety of your loved ones. there is no price too great to pay, to ensure that they are cared for. All it takes is one small leak. Good luck!
Black and/or soft copper with flared ends. Add drip legs made from black pipe when entering an appliance just like NG. Local propane supplier should be helpful.
Well.first of all, I hope that's a typo and the tank is not IN the cabin. It must be outside. Second I think some people may be confusing galvinized with corrugated stainless steel piping. It is used in some areas fairly extensively in new construction because it is very quick and easy to rough in when there is no drywall or anything up yet. Local gas codes depending on where you are, may or may not allow it. That stuff requires special tools and training to install so it probably isn't practical for you. For a retrofit I would probably run black iron pipe or you could use copper tubing. Either way it must be of sufficient size to carry enough fuel to feed the appliance. Black iron flows better than copper so if it is a long run you probably want to use B.I. pipe. If you are running the line through a block or cement wall you must use either L coated copper or black iron pipe. The lime in the concrete attacks exposed copper and corrodes it. You haven't mentioned what kind of appliance you are hooking up so a dirt pocket may or may not be required. Furnaces and water heaters, yes, fireplaces and cooking ranges, no. But if you do this yourself, have it inspected and pressure tested by a professional before you turn any fuel on. As previously mentioned by another person, some money is not worth saving!
