What is the capacity of a 1 1/4 inch schedule 40 natural gas line with a length of 60 feet at 2 psi?

To determine the capacity of a 1 1/4 inch schedule 40 natural gas line, we utilize tables and formulas that account for the line's dimensions, the length of the pipe, and the pressure drop across the system. A 1 1/4 inch schedule 40 pipe has an inner diameter that allows for a specific volume of gas to flow through it based on pressure and length.

In this scenario, with a pressure of 2 psi and a length of 60 feet, one can refer to gas flow capacity tables for natural gas piping that outline the cubic feet per hour (cfh) that different sizes of pipe can carry under various conditions. The calculations consider not only the pipe diameter and length but also the pressure, which allows gas to flow effectively without significant loss.

The value of 4,660 cfh represents the maximum flow capacity for this specific configuration. It indicates that at a pressure of 2 psi and for a 60-foot run, the line can efficiently deliver this amount of natural gas to the intended appliances or systems. Therefore, option C reflects the accurate calculation based on standardized methodologies used in the HVAC industry for sizing gas lines.

This capacity is essential when sizing piping systems for natural gas to ensure that