A line pressure regulator in a gas system must include which protection device?

A line pressure regulator in a gas system must include which protection device?

• A. An overpressure protection device
• B. A backflow preventer
• C. A temperature sensor
• D. A shutoff valve

Answer: (A)

Gas line regulators lower the incoming pressure to a safe downstream level, but they can fail or be overwhelmed by a surge. An overpressure protection device is there to sense when pressure in the downstream system exceeds the safe limit and relieve or vent gas to prevent damage, leaks, or a dangerous condition. This protection is essential because it directly guards against the regulator’s potential failure causing excessive downstream pressure. The other options don’t address this risk: a backflow preventer is for preventing reverse liquid flow, not protecting gas piping; a temperature sensor isn’t related to pressure protection; and a shutoff valve can isolate flow but doesn’t automatically relieve pressure or protect against regulator failure.

Gas line regulators lower the incoming pressure to a safe downstream level, but they can fail or be overwhelmed by a surge. An overpressure protection device is there to sense when pressure in the downstream system exceeds the safe limit and relieve or vent gas to prevent damage, leaks, or a dangerous condition. This protection is essential because it directly guards against the regulator’s potential failure causing excessive downstream pressure. The other options don’t address this risk: a backflow preventer is for preventing reverse liquid flow, not protecting gas piping; a temperature sensor isn’t related to pressure protection; and a shutoff valve can isolate flow but doesn’t automatically relieve pressure or protect against regulator failure.