Why LPG requires specific risk controls in New Zealand workplaces

Liquefied Petroleum Gas (LPG) is widely used in New Zealand workplaces because it is efficient, portable, and well-suited to indoor and outdoor industrial equipment. However, those same properties also introduce specific hazards that must be actively managed under New Zealand health and safety law.

Understanding why LPG requires additional controls is the first step toward using it safely and getting the best performance from LPG-powered equipment.

LPG is a hazardous substance

Under New Zealand regulations, LPG is classified as a hazardous substance. This means businesses must systematically manage their risks, rather than relying solely on operator experience or informal practices.

The key hazards associated with LPG include:

• Fire and explosion risk
• Gas leaks
• Asphyxiation in enclosed or poorly ventilated areas
• Cold burns from rapidly escaping gas

These hazards exist even when LPG is used correctly, which is why specific controls are required.

LPG behaves differently from other fuels

Unlike diesel or petrol, LPG is stored under pressure as a liquid and turns into gas when released. This creates risks that are not always obvious:

• LPG is heavier than air, so it can collect at ground level in depressions, gutters, drains and so on
• Gas can spread a long distance before finding an ignition source
• Leaks may not disperse quickly without good ventilation

Because of this behaviour, LPG incidents often escalate rapidly when controls fail.

Legal duties in NZ workplaces

Under the Health and Safety at Work Act 2015, employers (PCBUs) must eliminate risks where reasonably practicable, or minimise them using effective controls.

For LPG, this typically includes:

• Safe storage and separation distances
• Adequate ventilation
• Properly trained and authorised workers: workers who handle it must do dangerous goods handler training or, if they use LPG bottles for machinery such as forklifts, the forklift LPG bottle swap training. They must also do fire extinguisher training, as part of the requirements under the Health and Safety (Hazardous Substances) legislation.
• Regular inspection and maintenance
• Clear emergency procedures.

Failing to manage LPG risks can expose workers, contractors, visitors, and emergency responders to serious harm.

Why training alone isn’t enough

Training is a critical control, but it works best when combined with:

• Good site layout
• Clear procedures
• Ongoing supervision
• Reinforcement through toolbox talks and refresher training

When LPG safety becomes “how we do things here”, workplaces see fewer incidents, less downtime, and better equipment reliability.

Key takeaway

LPG is safe when managed properly, but it demands specific controls because of how it behaves and how quickly incidents can escalate. Understanding these risks helps businesses meet their legal duties and protect people, property, and productivity.