What kind of steel is relining pipe made from?
Relining pipe that is manufactured for the purpose of venting wood, coal, wood pellet, oil, or high-efficiency gas appliances is always made of stainless steel. The thickness of the steel depends on the brand of relining pipe. The alloy of the steel depends on the application. Wood and wood pellet appliances are generally served by 304-alloy stainless steel pipe. Coal and oil appliances require 316-alloy stainless steel relining pipe because it is more resistant to the kind of corrosion caused by those fuels. High-efficiency gas appliances are best relined with AL 29-4C alloy relining pipe. This alloy is highly resistant to corrosion. High-efficiency gas appliances emit a more corrosive flue gas due to the high quantity of moisture in the flue gases.
