What material can be used for LP gas lines?

Black iron pipe and copper pipe are both acceptable materials for LP (liquefied petroleum) gas lines. Black iron pipe is commonly used in gas line installations because of its strength and durability, making it suitable for high-pressure applications. It is resistant to corrosion, provides a tight seal, and can handle the physical stresses encountered in gas systems.

Copper pipe is also a valid choice, particularly in residential and some commercial applications. It is lightweight, corrosion-resistant, and easy to install. Copper can be used for low-pressure applications, which makes it a practical option for certain gas line installations. However, it is essential to ensure that any joints or connections in copper installations are made using appropriate fittings and methods to maintain system integrity and safety.

Using plastic pipe is not suitable for LP gas lines due to safety concerns, including its potential to degrade and not being able to withstand the pressures required for gas service. This ultimately restricts the choices to black iron and copper as appropriate materials for safe and effective LP gas line construction.