What action should be taken if any fittings or ends are open in a new gas piping system?

In a new gas piping system, it is essential to ensure that all fittings or ends are properly secured to prevent any potential leaks of gas. If any fittings or ends are left open, it poses a serious safety risk, as gas can escape, leading to hazardous conditions.

Plugging or capping the open ends is the correct action to take because it effectively seals the system, ensuring that no gas can leak. This is critical not only for the safety of the facility and its occupants but also for compliance with safety regulations and standards governing gas installations. By sealing these fittings, you are actively preventing danger and ensuring the integrity of the gas piping system before it is put into operation.