The types of pipes used for gas lines are made of metal, such as steel, iron, copper, brass, and aluminum. The newest type of piping material is called the corrugated stainless steel tubing (CSST). It is usually has a yellow or black plastic coating. Its advantage is that it is flexible, requiring lesser joints and is, therefore, less prone to gas leaks. It is also easier to install compared to other pipes. This was introduced in the U.S. in the 1990s and since then, millions of homes have used CSST for their gas pipelines.
No matter what material is used, it is safe as long as they are installed by licensed and accredited electrical professionals. The NEC also requires that all metal gas piping system should be properly bonded and grounded. This will reduce the electrical surge during lighting and it also reduces the risk of fire. You may not know it, but around 7,000 houses or more are struck by lightning every year in the U.S. A lightning strike can cause the nearby structures to be energized and this can affect the gas piping.
Gas line bonding is done by attaching a bonding clamp (or bonding jumper) to the gas pipe connection, wherein a bonding wire conductor is connected leading to the grounding electrode or grounded conductor at the electrical service or the electrical service equipment enclosure. The electrical code has specific guidelines on the size of the jumper and of the wire, as well as other requirements needed in the process. All bonding connections are required by the code to be accessible.
If you are not sure if you’re CSST gas lines are properly bonded and grounded, contact American Air Heating & Cooling to make an inspection of your home. If it isn’t bonded, they can do the services for you.