Typical Incidents Caused by the Absence of Gas Detection Systems: Analysis of Real Cases

In many facilities, gas detection systems (GDS) are still perceived as a secondary element of engineering infrastructure. They are installed “only when required,” optimized out, or excluded from projects altogether. The reason is the lack of an obvious threat during day-to-day operations.

However, this very “invisibility” creates the greatest risk. Gases are often colorless, may be odorless, and tend to accumulate gradually. As a result, most gas-related incidents occur not due to sudden events, but due to the absence of timely detection.
Below are typical accident scenarios regularly observed in practice, along with the reasons they become possible.

1. Carbon Monoxide Poisoning in Underground Parking Facilities

Scenario.
An enclosed or underground parking facility with insufficient ventilation. Vehicles idle, producing carbon monoxide (CO), which gradually accumulates.

What happens without GDS.

Ventilation operates in a manual or fixed mode and does not respond to actual air quality. Personnel and visitors remain unaware of the danger until symptoms appear.

Consequences.
Dizziness, loss of consciousness, hospitalization. In critical cases — fatalities.

Root cause.
Absence of CO detectors and automated ventilation control.

2. Explosions in Boiler Rooms Due to Gas Leaks

Scenario.
A minor natural gas leak in a boiler room or heat generation facility. Gas accumulates within the enclosed space.

What happens without GDS.
The leak remains undetected. Concentration reaches an explosive level. Any ignition source can trigger an explosion.

Consequences.
Equipment destruction, structural damage, personnel injuries.

Root cause.
Lack of a gas detection system with automatic gas shut-off functionality.

3. Industrial Incidents Involving Toxic Gases

Scenario.
An industrial facility where toxic gases (e.g., ammonia, chlorine, process gases) are used or generated. A leak occurs.

What happens without GDS.
Personnel lack real-time information about gas concentration. Evacuation is delayed or improperly executed.

Consequences.
Poisoning, production downtime, environmental impact.

Root cause.
Absence of continuous gas monitoring and response scenarios.

4. Refrigerant Leaks in Technical Rooms

Scenario.
Refrigeration or HVAC systems using gas-based refrigerants. A leak occurs in a confined technical room.

What happens without GDS.
Gas displaces oxygen, creating a hazardous environment. The leak may go unnoticed for an extended period.

Consequences.
Risk of asphyxiation, equipment failure.

Root cause.
Lack of monitoring for gas concentration and oxygen levels.

5. Accumulation of Explosive Gas Mixtures in Storage Areas

Scenario.
Warehouses storing gas cylinders or substances capable of emitting gases. A leak occurs due to damage or handling issues.

What happens without GDS.
Gas accumulates without control. No alarm is triggered, preventing timely response.

Consequences.
Explosion or fire with large-scale damage.

Root cause.
Ignored storage risks and absence of early detection systems.

A Common Root Cause Across Most Incidents

Despite differing scenarios, most incidents share the same underlying cause — the absence of early detection.

The key issue is not that the system failed, but that it was never implemented — or was implemented only formally:

• without considering the types of gases involved;
• without proper detector placement;
• without integration with ventilation and automation systems;
• without ongoing maintenance.

As a result, the system fails to fulfill its primary function — providing time for response.

Why Businesses Ignore Gas Detection Systems

Analysis of incidents shows that decisions to omit or minimize GDS are typically driven by the same factors:

• cost-cutting during construction;
• underestimation of risks;
• lack of understanding of incident development scenarios;
• a formal approach to safety.

In essence, this is a management decision that creates a deferred risk.

How to Change the Approach

To prevent such incidents, GDS must be treated as part of an integrated safety system, not as a standalone component.

A proper approach includes:

• identifying potential gas sources within the facility;
• selecting detectors based on specific gas types;
• correct placement considering gas behavior (lighter/heavier than air);
• integration with ventilation and emergency systems;
• regular maintenance and testing.

This ensures not only compliance with regulations, but real risk management.