How many cubic feet of natural gas is allowed to flow down a 1.5" type K semi-rigid copper tube in a specific piping network?

• A. 450 cubic feet
• B. 563 cubic feet
• C. 600 cubic feet
• D. 750 cubic feet

Answer: (B)

The amount of natural gas that can flow through a piping system is determined by various factors such as the diameter of the pipe, the pressure of the gas, and the specific design of the piping network, which includes the type of material of the pipe and its configuration.

In this case, a 1.5" type K semi-rigid copper tube is a standard size and material used for natural gas applications. Type K copper, known for its heavy wall thickness, provides a robust option for gas distribution, allowing for a relatively high flow rate due to its superior pressure handling characteristics.

The choice of 563 cubic feet aligns with established flow capacities for a 1.5" type K copper tube under typical pressure conditions (such as those expected in residential and commercial gas supply systems). Various tables and charts used in the HVAC and plumbing industries specifically list these values based on empirical data collected from testing the flow rates of gases through pipes of different materials and sizes.

Understanding these flow capacities is crucial for ensuring that the gas supply is adequate for the appliances being serviced, making this information vital for professionals working in heating and cooling systems.