A 127 foot long gas line in metallic pipe requires which size when carrying undiluted LP gas at specified conditions?

When determining the appropriate size of gas piping for carrying undiluted LP gas, several factors, such as the length of the line, the type of gas, and the pressure at which it is being transported, must be considered. In this case, a length of 127 feet is relatively long, which means that the pipe diameter has a significant impact on the friction loss and flow rate of the gas.

A 2-inch pipe is well-suited for carrying undiluted LP gas over that distance because it provides a lower pressure drop, ensuring that the gas flows efficiently without excessive loss of pressure. The larger diameter allows more gas volume to pass through, which is crucial for maintaining adequate supply especially in longer runs like 127 feet. Additionally, LP gas is typically carried at high pressures, and a 2-inch diameter pipe helps accommodate those pressures while reducing the risk of issues like gas friction loss and possible bottlenecking that may occur with smaller pipe sizes.

Overall, selecting the 2-inch size for the gas line aligns with standard practices in the industry for similar applications, ensuring safety and efficiency in transporting LP gas. This choice effectively addresses the requirements related to length, pressure, and flow capacity in this context.