The Vital Importance of Grounding Corrugated Stainless Steel Tubing to Prevent Fires

The Guilford Fire Department is dedicated to safeguarding our community from potential fire hazards. One critical aspect of fire safety within residential homes and businesses involves the proper grounding of corrugated stainless-steel tubing (CSST). CSST is commonly used as a gas pipeline, and while it is a durable and efficient material, it can pose a serious risk if not adequately grounded. In this article, we will discuss the importance of grounding CSST to prevent lightning-induced fire incidents and provide essential safety tips for residents and business owners.

Understanding the Risk:

Corrugated stainless steel tubing is a popular choice for gas pipelines due to its flexibility and ease of installation. However, its thin walls and insulating properties make it susceptible to damage from electrical currents, particularly those induced by lightning strikes. When lightning hits a structure, it can generate a significant surge of electrical energy that seeks a path to the ground. If CSST is not appropriately grounded, it becomes a potential conductor for the electrical surge, leading to sparks, arcing, and ultimately, a devastating fire.

The Role of Proper Grounding:

Grounding is a fundamental electrical safety measure that provides a controlled pathway for electrical currents to discharge harmlessly into the ground. In the context of CSST, a properly grounded gas pipeline offers a safe route for any lightning-induced electrical energy to bypass the tubing and flow

Illustration (left) of bonding jumper length and (right) an example of multi-piping material system.

harmlessly into the earth. As a result, the risk of sparks and ignition decreases significantly, minimizing the potential for fire accidents.

Safety Measures for Residents and Business Owners:

1. Consult a Licensed Professional: When installing or modifying CSST within your property, always consult a licensed electrician or gas contractor who is experienced in grounding procedures. They will ensure the proper installation and compliance with local codes and safety standards.

2. Grounding Electrode System: An effective grounding system requires connecting the CSST to the building's grounding electrode system. This system typically consists of grounding rods, conductors, and other components designed to disperse electrical energy safely.

Example (left) of bonding at the manifold and (right) of bonding at the drip leg.

3. Bonding: In addition to grounding, it's essential to bond the CSST to other metal components within the structure. This ensures electrical continuity and prevents potential voltage differences that could lead to arcing.

4. Surge Protection: Consider installing surge protection devices in your electrical panel and gas line system. These devices can help absorb and dissipate electrical surges before they reach the CSST.

5. Regular Inspections: Periodically inspect the CSST and its grounding system for signs of damage, corrosion, or loose connections. Promptly address any issues detected during these inspections.

The Guilford Fire Department urges all residents and business owners to recognize the critical importance of grounding corrugated stainless steel tubing. By taking the necessary precautions and following the safety measures outlined in this article, you can significantly reduce the risk of lightning-induced fires and protect your property, loved ones, and community. Remember, fire safety is a collective responsibility, and together, we can create a safer environment for all.