How should gas pipes be supported during installation?

Gas pipes should be supported using appropriate hangers to ensure that they maintain a straight and secure layout throughout the installation process. Proper support is critical for several reasons. It prevents sagging, which can lead to stress on the pipes and potential failure or leaks. Additionally, adequate support helps maintain the alignment of the pipes, allowing for proper flow and reducing the risk of blockages or operational issues.

Using hangers also helps to mitigate vibrations from piping systems and adjacent equipment, providing stability that contributes to the overall safety and reliability of the gas system. It ensures that thermal expansion and contraction do not adversely affect the piping system's integrity.

The other methods listed would either fail to provide adequate support, pose safety hazards, or not meet regulatory standards. For example, allowing pipes to hang freely could lead to significant operational and safety risks, and embedding them in concrete might complicate maintenance and inspections. Using incompatible materials would compromise the system's safety and efficiency, making them unsuitable choices for proper installation.