EX-Proof Containers in the Chemical Industry: Key Applications of TLS Pressurized Containers for Electrical Systems

In hazardous chemical environments where flammable gases and vapors are frequently present, the safe operation of electrical systems is not only essential for maintaining production efficiency—it is also critical for protecting personnel and assets.
Traditional flameproof (Ex d) solutions are increasingly challenged by their limitations in flexibility, maintenance, and installation costs. TLS, as a specialized manufacturer of functional containerized systems, provides high-safety, easy-to-integrate, and field-deployable pressurized explosion-proof (Ex p) solutions to support safety transformation and intelligent upgrades across the chemical, pharmaceutical, and energy sectors.

1. Why Pressurized Protection is Essential in Hazardous Chemical Zones

Chemical facilities typically include Zone 1 and Zone 2 areas, where explosive gas atmospheres may occur under normal or abnormal conditions. Electrical equipment operating in these areas—such as DCS units, PLC panels, communication devices, VFDs, and gas analyzers—can pose a serious ignition risk due to electrical arcs, sparks, or temperature rise.
With increasing automation and the centralization of equipment, conventional explosion-proof designs struggle to meet modern requirements, including:

• Centralized wiring and safe isolation for multiple devices
• Effective ventilation and heat dissipation in confined spaces
• Rapid equipment access and reliability during frequent maintenance

2. TLS Pressurized Enclosure Systems: Creating a Safe Space for Electrical Equipment

TLS offers integrated Ex p pressurization systems based on modular container platforms. By maintaining a stable positive pressure within the sealed enclosure, the system prevents flammable gases from entering and coming into contact with potential ignition sources. This approach provides a safe, cost-effective, and scalable solution for explosion protection.
All TLS systems are designed in compliance with GB/T 3836.5-2017 and meet the following classification levels:

• Ex px: Downgrades Zone 1 to a non-hazardous area
• Ex py: Downgrades Zone 1 to Zone 2
• Ex pz: Downgrades Zone 2 to a non-hazardous area

3. Core Features of TLS Pressurized Containers

• High Integration & Compatibility: Supports centralized installation of critical components such as control modules, power supplies, VFDs, analyzers, and communication units—saving valuable space while ensuring functional safety.
• Intelligent Control System: Equipped with internal pressure monitoring, gas detection, and auto interlock modules. Local alarms and remote signal outputs ensure safe, real-time operation。
• Ventilation Mode Adaptable: TLS positive pressure container adopts positive pressure ventilation type structure, maintains the positive pressure state inside the box through continuous air supply, applicable to the site conditions with stable gas source (such as compressed air or purified gas system), can effectively respond to the operation needs of petrochemical, offshore and other typical explosion-proof places.
• Easy Deployment & Customization: Fully customizable in terms of dimensions, cut-outs, and internal bracket layouts. Compatible with wall-mounted, skid-mounted, containerized, and freestanding installations. Material options include weathering steel and powder-coated carbon steel for corrosive environments.

4. Why Choose TLS?

• Over a decade of expertise in pressurized enclosure system design and manufacturing
• Products certified to IECEx, ATEX, and GB explosion protection standards
• Fast customization, bulk delivery, and on-site technical support
• Proven project experience across Asia, the Middle East, and North America, with solutions widely adopted in chemical, energy, and offshore sectors—especially in environments with complex installation conditions and high-density electrical integration

Conclusion

As a key component in electrical safety infrastructure, pressurized explosion-proof containers are becoming indispensable for achieving intrinsic safety and system reliability in hazardous industries. TLS remains committed to advancing the development and deployment of Ex p systems, helping our clients achieve safer, smarter, and more efficient operations.

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.
 
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Written by Snowy

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