What must be confirmed about gas piping materials before use?

The confirmation that gas piping materials comply with NFPA 54 requirements is essential because NFPA 54, also known as the National Fuel Gas Code, sets the safety standards for the installation of gas piping systems. This compliance ensures that the materials used are designed to handle gas safely and effectively, reducing the risk of leaks, fires, or other hazardous situations. The code encompasses specifications regarding material strength, durability, sizing, and installation practices, which are all critical for maintaining the safety and integrity of gas piping systems in various applications.

While factors such as cost, previous usage, or origin of materials might influence decision-making in other contexts, they do not directly address the safety and performance standards mandated by NFPA 54. Compliance with these established guidelines is vital to ensure that installations meet safety regulations and effectively protect public health and property.