What is the maximum capacity in cubic feet of gas per hour for half-inch nominal size schedule 40 metallic pipe?

What is the maximum capacity in cubic feet of gas per hour for half-inch nominal size schedule 40 metallic pipe?

• A. 75
• B. 81
• C. 90
• D. 100

Answer: (B)

To determine the maximum capacity in cubic feet of gas per hour for half-inch nominal size schedule 40 metallic pipe, it's essential to consider the inner diameter of the pipe and the specific gas properties. For a half-inch nominal size schedule 40 pipe, the internal diameter is approximately 0.622 inches.

Using standard gas flow calculations, including factors such as the gas type, pressure, and temperature, one can ascertain that the capacity of a half-inch pipe typically falls around 81 cubic feet of gas per hour. This value is a result of specific criteria set in the National Fuel Gas Code, which considers safe operating conditions and efficiency standards.

The calculated figure aligns with the accepted industry standards for the flow of different gases through such pipes, making 81 cubic feet per hour the recognized maximum capacity for this size of pipe under normal conditions. Understanding this maximum capacity allows engineers and professionals to select the appropriate piping system for their specific gas distribution needs, ensuring safety and compliance with building codes.