What is the horizontal hanger spacing for 1/2 inch nominal steel gas piping?

• A. 4 feet
• B. 6 feet
• C. 8 feet
• D. 10 feet

Answer: (B)

The key idea is how far a horizontal gas pipe can span before needing support. For 1/2 inch nominal steel gas piping, the standard practice is to place hangers every six feet along horizontal runs. This spacing helps prevent sag, reduces movement that could stress joints, and keeps the gas piping stable under pressure and any thermal expansion. Larger pipe sizes use longer intervals, but for this smallest size, six feet is the typical requirement. If the run is longer, you simply add supports at six-foot intervals. Always check the current fuel-gas code in your jurisdiction, but six feet is the common spacing for this size.