G2 Gas Fitter Practice Exam 2025 - Free Gas Fitter Practice Questions and Study Guide

The allowable pressure drop in a tubing system operating at 2 psig (13.79 kPa) is indeed defined by the Ontario Gas Utilization Code, which sets specific limits to ensure the safe and efficient operation of gas systems. For a system operating at this pressure, the code specifies that the maximum allowable pressure drop should not exceed 6 inches of water column (approximately 1.5 kPa) over the length of the distribution system.

This limit is crucial as it helps maintain adequate gas supply to appliances connected to the system, ensuring that they operate effectively without experiencing too much pressure loss. If the pressure drop is higher than the allowable amount, there could be insufficient gas flow to the appliances, leading to performance issues or unsafe operating conditions.

The context surrounding the allowable pressure drop is significant as it influences installation practices. Gas fitters must ensure that pipes are sized correctly and that the layout of the tubing system minimizes unnecessary bends or restrictions that could contribute to higher pressure drops.

Understanding these regulations is essential for gas fitters, as compliance ensures both the safety of the installation and the reliability of gas appliances. The correct knowledge of allowable pressure drops impacts not just safety but also the efficiency of the gas system in delivering the required energy to the end users