Which material is permitted for piping in propane installations?

Wrought iron pipe is permitted for use in propane installations due to its durability and ability to withstand the high pressures associated with propane systems. It is resistant to corrosion and can provide a secure and safe method for transporting propane gas. This makes it a suitable choice in terms of safety and reliability in the context of such installations.

While other materials like galvanized steel may also be used in certain applications, wrought iron specifically is recognized for its long-standing history and adherence to industry standards for propane piping. On the other hand, plastic tubing and copper pipe are not typically allowed for high-pressure systems like those used in propane transport, as they may not meet the necessary safety standards and could be more susceptible to damage over time.