202.16 LPG & CNG

What is the correct course of action if there is flame impingement on a visible LPG/CNG storage tank?

What can happen if a pressure relief device for an LPG or CNG tank fails?

Which statement about LPG/CNG vehicle marking is accurate?

If vapors escaping from a storage tank relief valve have ignited, what is the recommended action?

How can the flow of gas through piping be controlled in an emergency?

LPG & CNG as Vehicle Fuels

LPG (Liquefied Petroleum Gas) and CNG (Compressed Natural Gas) serve as alternative fuel sources for vehicles.
Pressure release devices alongside these fuels can produce dangerous fire effects, including a "blow torch" incident.

Safety Hazards

Failure of pressure relief devices can result in a BLEVE (Boiling Liquid Expanding Vapor Explosion).
Vehicles using LPG/CNG may not display standard hazard markings, increasing risk during emergencies.

Emergency Response Actions

If flames are affecting a visible LPG/CNG storage tank, prioritize fire control and cooling the tank.
Engage emergency shutoff controls to halt gas flow from the storage tank when possible.

Fire Management

In scenarios where vapors from a storage tank's relief valve ignite, allow combustion while mitigating risks to surrounding areas and cooling the tank.
Gas flow through piping can be managed by shutting valves at the storage tank to prevent further gas release.

Hazard Assignment

The situation should maintain a balance of 2 & 1 hazardous assignment to ensure safety during responses to LPG/CNG incidents.

This quiz covers the safety protocols and emergency procedures related to the use of LPG and CNG as vehicle fuels. Learn about pressure release devices, risks associated with BLEVE, and actions to take in the event of a fire. Test your knowledge on identifying hazards and operating emergency controls.