Why is improper bonding a concern for CSST in older installations?

Improper bonding in CSST (Corrugated Stainless Steel Tubing) is a significant concern, particularly in older installations, because it can lead to fire and safety hazards. CSST systems are designed to carry natural gas or propane, and the bonding process involves connecting the metal CSST to the electrical grounding system of the building. This grounding is crucial for providing a safe path for electrical surges or faults that might occur.

When CSST is not properly bonded, it may become energized, especially if it is struck by lightning or if there is a fault in the electrical system. In such cases, the potential for arcing exists, which can ignite gas leaks, leading to explosions or fires. Therefore, the safety of occupants and property is at risk if proper bonding is not maintained.

While improper bonding might have impacts on energy efficiency, legal requirements, and maintenance costs, these factors do not present the immediate and severe risks to life and property that fire and safety hazards do. This makes the proper bonding of CSST an essential safety measure in gas piping systems.