Gas Fitter Practice Test

What is the relief valve setting on a propane tank (pressure vessel)?

1. 375

2. 250

3. 175

4. 35

The correct answer is: 250

The relief valve setting on a propane tank, which is designed to release excess pressure to ensure safety, is typically set at 250 psi. This standard setting allows the valve to open and vent gas if the pressure inside the tank exceeds a safe level, thereby preventing potential ruptures or explosions. The settings for relief valves are established based on safety standards, ensuring they activate before reaching pressures that could pose a danger. Propane tank systems operate under specific pressure limitations, and the 250 psi threshold is considered appropriate for typical residential and commercial use, balancing safety and operational efficiency. Lower settings would not provide sufficient pressure control, while excessively high settings could fail to protect against pressure build-up, highlighting the importance of the correct 250 psi setting in maintaining safety within propane storage and distribution systems.