Flammable Gas: Three Things You Should Know

What is flammable gas? Flammable gases come in a wide variety, but they all have one common denominator: flammable gas will burn when it is in the presence/ mix of an oxidant and provided with a source of ignition.

What Is a Flammable Gas?

Flammable gases come in many forms, but they all share one thing in common: they can ignite when mixed with an oxidizer (like air or oxygen) and exposed to a source of ignition.

In simple terms, a flammable gas becomes explosive when it is combined with air or oxygen in specific ratios. Common examples include propane, hydrogen, butane, methane, ethylene, acetylene, ammonia, ethane, and silane.

1. Flammable Gas – Defined

A flammable gas—also referred to as a combustible gas—is any gas that can catch fire and explode when mixed with air or oxygen under the right conditions. The terms “flammable” and “combustible” are often used interchangeably in industrial settings.

Some of the most recognized flammable gases include:

2. Types of Flammable Gases

Let’s take a closer look at a few notable types:

Hydrogen

Hydrogen is currently one of the most talked-about gases, especially with the global shift toward cleaner energy. It’s used in various industries, including fuel cells and aerospace. When mixed with oxygen, hydrogen is extremely flammable and must be handled with care.

Butane

Butane (C4H10) is a common LPG (Liquefied Petroleum Gas) used in camping stoves, lighters, and as a calibration gas. It has two isomers: n-butane and iso-butane. Though chemically identical in formula, their atomic structure differs, giving them slightly different applications.

Methane

Methane (CH4) is the primary component of natural gas and is used as an energy source worldwide. While abundant and energy-rich, methane is also a potent greenhouse gas. Its flammability makes it a practical fuel, but it requires careful storage due to its gaseous state at ambient temperature and pressure.

Other Common Flammable Gases

The following gases are also flammable under the right conditions:

Ethylene, Acetylene, Ammonia, Ethane, and Silane.

3. How to Store Flammable Gases Safely

Flammable gases are more hazardous than standard gases, and proper storage is essential. To minimize risk, follow these key safety guidelines:

• Store in a cool, dry, and dark place – ideally in a designated gas cabinet or cylinder storage area.
• Keep away from heat sources – including direct sunlight, open flames, electrical equipment, or hot surfaces.
• Ensure good ventilation – Proper airflow reduces the risk of gas buildup, which could lead to combustion or explosion.
• Never store near food or drink – Always separate hazardous gases from consumables.
• Use proper containment – Only use approved cylinders and make sure they are clearly labeled and regularly inspected.

Final Thought

Understanding and safely handling flammable gases is critical in any industrial environment. Whether you’re working with hydrogen for clean energy or butane for calibration, W&O offers the equipment, testing tools, and technical support you need to manage flammable gases safely and effectively.

Need gas detection tools or storage solutions? Explore our catalog or contact our team for expert advice tailored to your vessel or facility.