Pressure.
Yellow
Try Nitrogen (For natural gas lines NOT cars /trucks etc)
Hard copper using silfoss for the joints, copper tubing using flare connections, and screwed black iron pipe. You should hire a Journeyman gas fitter and get a permit for any gas work done as if there is a problem, it won't be covered by your insurance!!!!
Yes. But, only if the union is after a main shut off valve and is before and appliance connection. ex. A ball valve then pipe and a union before an furnace connection. Unions used as couplings to lengthen pipe are not code approved.
Absolutely Not!
NO!! Black iron pipe has a special coating to resist the highly corrosive effect of natural gas. Galvenized pipe CANNOT be used for gas service.
ASTM D1785 does NOT approve that pipe for use with natural gas - PVC schedule 40 / 80 / 120 is approved for use of pressurized liquids ONLY. The ONLY plastic (type) pipe approved for Natural Gas above ground is "Polyethyline" pipe "PolyPipe" that uses special heat sealed fittings. (ANSI 58 / ASTM D2513)
NO..copper,black iron, galvanized for gas pipe.never use plasticp solvents or glue.gas does not react well with other chemicals.
You should use black pipe -- Galv. pipe will flake off inside of pipe
Orange pipe is for natural gas.
Galvanized pipe is used for natural gas lines and pressure vent lines, and for electrical conduits. As a water supply or drain pipe, it is subject to rusting over time.
Pretty much anything - in the UK steel, copper, polyethylene and PVC are all used where suitable.
It is Natural Gas Pipe Line Regulator
Natural gas is corrosive and black pipe does not corrode so there is no debris to clog the lines. A more common form of gas pipe is corrogated stainless steel. Especially in residential homes. For more information visit www.plumbingspecialists.com and check out their natural gas page under servies.
It is not a good idea to use copper pipe with natural gas as any sulphur compounds in the gas can cause an oxide to form in the copper pipe. Often copper is used with propane. In these instances, soft copper tubing is usually used with compression fittings. The tools required are, pipe cutter and 2 wrenches.
It is Natural Gas Pipe Line Regulator