Which is the smallest buried underground gas piping size according to the standard?

Which is the smallest buried underground gas piping size according to the standard?

• A. 1/2 inch
• B. 3/4 inch
• C. 1 inch
• D. 1 1/4 inch

Answer: (B)

The standard requires a minimum size for buried gas piping to ensure enough gas flow and acceptable pressure along the service run. The smallest size allowed for underground piping is three-quarters of an inch nominal. A smaller size, such as half an inch, would typically not provide adequate flow or pressure for residential loads when buried, especially over longer runs. Larger sizes (like 1 inch or 1 1/4 inch) are permitted where the gas demand or distance requires them, but they are not the minimum.

The standard requires a minimum size for buried gas piping to ensure enough gas flow and acceptable pressure along the service run. The smallest size allowed for underground piping is three-quarters of an inch nominal. A smaller size, such as half an inch, would typically not provide adequate flow or pressure for residential loads when buried, especially over longer runs. Larger sizes (like 1 inch or 1 1/4 inch) are permitted where the gas demand or distance requires them, but they are not the minimum.