​In industries where explosive or flammable materials are prevalent, ensuring the safety of equipment and personnel is of utmost importance. Positive pressurized containers are designed to meet the strict explosion-proof requirements of these hazardous environments. This blog explores the core principles behind these containers and why they are essential for ensuring operational safety.
 
What Are Positive Pressurized Containers?
Positive pressurized containers are specially designed enclosures that maintain a controlled internal pressure to prevent the ingress of hazardous gases or dust. These containers are crucial for housing electrical equipment and machinery that may not be explosion-proof but need to be safely operated in environments with a risk of explosion.
 
How Do Positive Pressurized Containers Work?
The principle behind positive pressurized containers lies in their ability to maintain a higher internal pressure than the surrounding environment, thereby preventing the entry of flammable or explosive materials. Here's a breakdown of the process that makes these containers effective in explosive environments:
  • Automatic System Activation
Once the total power supply is switched on, the positive pressure ventilation system is automatically activated. This triggers the explosion-proof blast system to start the process of purging the container.
  • Fresh Air Inflow
The system pulls fresh air from a safe distance, typically 30 meters away from the hazardous zone, using an explosion-proof centrifugal fan. This fresh air is introduced into the container to maintain the positive pressure required to keep the environment safe.
  • Purging Process
The incoming fresh air circulates within the container, effectively purging the internal environment. This purging process ensures that the container achieves a positive pressure of over 50Pa. The purging typically lasts for up to weeks, depending on the operating conditions.
  • Controlled Power Activation
After the container has been properly purged and the required positive pressure is established, the total power supply is activated. This allows the non-explosion-proof equipment within the container to operate safely under controlled conditions.
  • Continuous Monitoring and Alarm System
A key feature of positive pressurized containers is the integrated monitoring and alarm system. The explosion-proof control system constantly monitors the internal conditions of the container. If dangerous gases are detected or if the required positive pressure falls below the threshold, an alarm is triggered. If the system fails to meet safety conditions within a set timeframe, it automatically shuts down the non-explosion-proof equipment inside the container to prevent potential risks.
 
Why Positive Pressurized Containers Matter
Positive pressurized containers are an essential safety feature in environments where explosive or flammable materials are present. Their design ensures that non-explosion-proof equipment can safely operate within hazardous zones by creating a safe and controlled environment inside the container. Here are some of the key benefits:
  • Safety: By maintaining a constant positive pressure, these containers help prevent the ingress of hazardous gases and dust, significantly reducing the risk of an explosion.
  • Cost-Effective: Companies can use regular non-explosion-proof equipment in positive pressurized containers, saving on the high costs of explosion-proof alternatives.
  • Compliance: These containers adhere to the latest safety standards and regulations, ensuring that your operations remain in compliance with industry requirements.

TLS Offshore Pressurized Containers
​At TLS Offshore Containers, we prioritize safety and compliance. Our positive pressurized containers are designed and manufactured to meet the highest standards in the industry. With cutting-edge features and robust testing procedures, our containers provide a secure and explosion-proof environment for your operations, no matter how demanding the conditions.
 
TLS Offshore Containers / TLS Special Containers is a global supplier of standard and customised containerised solutions. 
Wherever you are in the world TLS can help you, please contact us.
 
Product brochures:
Offshore pressurised mud logging cabin brochure
MCC | Switchgear | VFD | VSD pressurised shelter
 
 
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Written by Oliver