How often must a one-inch horizontal steel gas pipe be supported, according to regulations?

The correct answer, indicating that a one-inch horizontal steel gas pipe must be supported every 8 feet, aligns with the standards set to ensure safety and structural integrity. Proper support helps prevent sagging or bending of the pipe, which can lead to leaks or failure, particularly in gas systems where maintaining pressure and preventing gas escape is crucial.

In terms of installation practices for gas piping, these regulations are designed not only to support the weight of the pipe but also to account for thermal expansion and contraction that can occur with temperature changes. Adequate support spacing, like the 8-foot requirement, decreases the risk of mechanical stress and potential hazards associated with gas leakage.

Shorter support distances, such as 2 feet, 4 feet, or 6 feet, would be unnecessarily frequent for a one-inch pipe, leading to increased labor and materials costs without a significant improvement in safety or compliance with the intended use of the pipe. Thus, adherence to the 8-foot support interval maintains a balance between practical installation and safety requirements.