Dangers of exposure to LPG

WorkCover NSW has issued an alert to remind employers and principal contractors of the dangers of exposure to liquefied petroleum gas (LPG) following the death of a worker.

An apprentice plumber and gas fitter was working alone on the connection of a new gas installation when he cut a live gas line, releasing LPG that filled the trench in which was working. He became unconscious and later died as a result of asphyxiation. The work involved tapping into an existing LPG reticulation system, inserting a T junction and running a gas line into a  home. A hole had been dug to access the existing underground line and while reaching head first into the hole to sever the line, the plumber was exposed to an LPG-rich atmosphere. The displacement of oxygen by the LPG led to unconsciousness, asphyxiation and eventual death by arrhythmia (disruption to the heart rhythm).

Among other factors, LPG is highly flammable, invisible and heavier than air. If it leaks or escapes it will flow along floors and downhill into gullies, and will tend to settle in low spots, such as trenches or basements. Aside from the risks of fire and explosion, the risk of death by asphyxiation is also substantial.

The following factors should be considered when working with LPG:

1. NSW Occupational Health and Safety and home builders legislation.
2. Conduct a site specific risk assessment.
3. Ensure that everyone in the workplace follows a safe system of work.
4. Ensure that everyone in the workplace is adequately and appropriately supervised.
5. Ensure that everyone in the workplace can access and read material safety information sheets.
6. Minimise exposure to LPG by having adequate ventilation.
7. Control all sources of ignition, including power tools and static.