What kind of materials is not recommended for gas piping?

Plastic piping is not recommended for gas piping due to its lack of durability and resistance to the harsh conditions often found in gas applications. Gas piping must be constructed of materials that can withstand high pressures, are resistant to corrosion, and can operate effectively in varying temperature conditions. Plastic does not meet these criteria, making it unsuitable for safely transporting gas.

In contrast, materials like flexible copper, steel, and cast iron are able to meet the rigorous standards set forth in the National Fuel Gas Code. These materials provide the necessary strength and reliability for gas distribution systems, helping to ensure safety and compliance with industry regulations.