What is the horizontal hanger spacing for 3/4" nominal steel gas piping?

In the context of HVAC systems and the installation of gas piping, proper hanger spacing is crucial to ensure safety, structural integrity, and effective operation of the system. For 3/4" nominal steel gas piping, the standard horizontal hanger spacing is typically established in industry codes and practices.

The reasoning behind choosing 8 feet as the correct spacing interval is based on those codes, which suggest that smaller diameter pipes, such as 3/4", need to be supported adequately to prevent sagging, bending, or potential damage. In practice, spacing hangers too far apart can lead to issues with the piping system, including excessive movement, vibration, or even failure due to inadequate support.

When considering the other spacing options, 4 feet, 6 feet, and 10 feet do not align with the common industry practice for 3/4" steel gas piping. While shorter spacing might seem more supportive, it is often unnecessary and could lead to increased costs and labor. On the other hand, longer spacing, like 10 feet, risks compromising the integrity of the piping system due to insufficient support.

Therefore, 8 feet stands out as an established standard that balances proper support with practical installation considerations.