What material should be resistant to the action of liquefied petroleum gas in piping?

The material that should be resistant to the action of liquefied petroleum gas (LPG) in piping is a thread compound specifically designed for such applications. Thread compounds are used to ensure a proper seal at threaded joints, preventing leaks of flammable gases such as LPG. The correct type of thread compound will have properties that allow it to withstand the chemical properties of LPG without degrading or compromising the seal.

In contrast, while metals can be used in piping systems for LPG, they do not serve the sealing function at threaded joints, which is critical for preventing leaks. Plastics and rubber are generally not suitable for handling the high pressures and temperatures associated with LPG, and may degrade over time, which could lead to leaks and safety hazards. Therefore, a properly formulated thread compound is essential to maintain the integrity of the piping system when working with liquefied petroleum gas.