Because of the potential hazard associated with the use of materials that have a lower resistance to physical damage and heat as compared to metallic pipe, the installation of plastic pipe cannot be used within or under any building slab or be operated at pressures greater than 100 psig (689 kPa) for natural gas or 30 ...
Copper. Copper is not as widely used for gas piping as it has been in the past. It lasts about 20 years, and both costs and usage restrictions can vary.
Steel, copper, brass: The most common gas piping is black steel. Galvanized steel, copper, brass or CSST (Corrugated Stainless Steel Tubing) also can be used in some areas, but some utilities specifically prohibit the use of copper. In other areas, the use of copper is widespread.
Copper and copper alloy pipe shall not be used if the gas contains more than an average of 0.3 grains of hydrogen sulfide per 100 standard cubic feet (scf) of gas (0.7 mg/100 L). Stainless steel tubing shall comply with one of the following: ASTM A268.
PVC (Polyvinyl chloride) is NOT approved for piping systems. Approved corrugated stainless steel tubing may be used for the interior gas piping provided that it is part of a system of tubing and fittings that has been tested and listed, for such gas piping system.
PVC or plastic pipes will work well for natural gas lines and water supply.
Contrary to popular belief, natural gas does not adversely react with the zinc coating on galvanized pipe.
Copper pipes are the best choice for natural gas lines because of their durability and corrosion-resistant properties. These pipes suit indoor heating systems since they can endure high temperatures. Copper pipes are a practical option with easy installation and low maintenance requirements.
It appears that the hydrocarbons in gasoline and the alcohol additives have no long term affect. The only warning that I would be concerned about is that PEX tubing in not resistant to UV light, so extended exposure (for more than a few weeks) to direct sunlight must be avoided.
Black iron is the most common material used to make gas pipes. Contractors often prefer it over other types of materials due to its strength, heat resistance, and because it fits snugly together with a compound that ensures an airtight seal. However, that seal can deteriorate with time, and the piping can corrode.
PVC pipes – This pipe works well for natural gas lines and water supply. It is available in sizes of 3-6 meters and comes in various diameters. For those settling with this material, it is a must to not position this pipe in areas where there is direct sunlight.
Section 1212 reads: (a) All pipe used for the installation, extension, alteration, and/or repair of any gas piping shall be standard weight wrought iron or steel, yellow brass (containing not more than 75% copper), or internally tinned or equivalently treated copper of iron pipe size.
The dark color comes from the iron-oxide formed on its surface during manufacturing. The primary purpose of black steel pipe is to carry natural gas into homes and businesses. The pipe is manufactured without a seam, making it a stronger and safer pipe to carry gas.
The most common materials used to make gas piping are steel, black iron, polyvinyl chloride (PVC), high-density polyethylene (HDPE) and copper. Some utilities prohibit some of these materials, so be sure to check with your local utility to determine what is allowed in your area before you install any.
Poly B™ piping is no longer suitable for use in residential plumbing. If you suspect your home has polybutylene pipes, get a professional inspection.
Steel (“black iron” or less commonly galvanized), HDPE (high-density polyethylene), copper (rarely), brass (even rarer except for a few fittings) or corrugated stainless steel for distribution piping and the gas lines run inside of residences and small businesses.
PEX and PE are flexible and rated for much higher pressure than most gas lines, so they meet those basic requirements. However, they are made of a soft material that nails, rodents, and other things could potentially damage.
Flexible gas lines are preferred by many households as they are safer than the traditional black steel pipes that get broken over a period of time. If the gas lines are properly installed, then they can be used for supplying natural gas or any other gas safely to your home or furnace.
PEX pipe is not approved for outdoor applications and is not approved for continuous UV exposure. PEX pipe should not be stored in direct sunlight.
galvanized pipe produces flakes that jam gas orifices. 3. using different pipe for gas makes sure gas pipe won't be used for water lines.
The gas codes allow copper if the gas contains less than 0.3 grains of hydrogen sulphide per 100 cubic feet. The presence of copper sulphide flakes is ominous because it can cause delayed ignition, fires, explosions, and incomplete combustion.
Black iron pipes are popular materials used for transporting gas and water. They are used both for household and commercial applications, and they are generally stronger than other materials such as PVC.
Brass fittings have been a popular choice for gas installations for several reasons: Corrosion Resistance: Brass is highly resistant to corrosion, making it a suitable material for gas applications. It can withstand the corrosive properties of natural gas and moisture, reducing the risk of deterioration over time.
Gasoline and diesel fuels are generally not corrosive to zinc coatings. However, water and/or sulfur found in refined oil fuels may form zinc compounds which can then clog filters and other small orifices.
Health Concerns
Older galvanized pipes may have lead in the zinc coating, which can leach into the water supply, posing a serious health risk. This is particularly concerning for drinking water. Homes built before the 1960s are more likely to have galvanized pipes with lead in the zinc coating.