In high-risk industries such as oil & gas, chemical processing, and hydrogen electrolysis, the operating environment often contains flammable gases or vapors. This requires containers used in such areas to comply with strict explosion-proof standards.
As a provider of customized functional container solutions, TLS fully understands the differences between Zone 1 and Zone 2 hazardous areas and adapts container structure, materials, and systems accordingly.
1. Zone 1 vs Zone 2 – Risk Levels Define Design Requirements
2. Container Structure – From Sealing to Ventilation
Zone 1 applications require a redundant fan system (N+1) with a backup power supply to ensure system operation. The standby fan has a fast gas replacement start-up mode and incorporates gas leakage detection and automatic power-off to ensure a safe positive pressure environment is maintained at all times inside the enclosure.
For Zone 2, a single-fan configuration can be used with adjustable start/stop strategies based on on-site risk levels and operating cycles, optimizing cost-performance balance.
3. Electrical and Control System Explosion-Proof Strategies
4. External Interfaces and Explosion-Proof Penetrations
Every cable or pipe penetration is a potential leakage point—especially in high-risk Zone 1 areas—so safety measures must be implemented from the source:
5. Design Adaptation Process – Starting from Risk Assessment
TLS participates in the client’s risk assessment process from the very beginning. Based on the area classification drawings provided, we develop targeted explosion-proof designs to ensure every detail meets the relevant standards.
Upon delivery, TLS also provides complete design drawings, interface documentation, and explosion-proof compliance files for client review and record-keeping.
Conclusion – True Adaptation is Safety in the Details
Adapting to Zone 1 and Zone 2 requirements is not simply a matter of choosing different components—it requires a holistic approach to container structure, ventilation, electrical systems, and safety logic.
Through project-based design, component-level certification, and system-level validation, TLS ensures every explosion-proof container is not only compliant but also safe, reliable, and maintainable.
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
Keywords：#Explosion-Proof Containers,#Zone 1 Safety Design,#Zone 2 Hazardous Area,#Positive Pressure System,#N+1 Redundancy,#Gas Purge Strategy,#ATEX Certification,#IECEx Standards,#Hazardous Area Equipment,#Offshore Safety Solutions
As a provider of customized functional container solutions, TLS fully understands the differences between Zone 1 and Zone 2 hazardous areas and adapts container structure, materials, and systems accordingly.
1. Zone 1 vs Zone 2 – Risk Levels Define Design Requirements
- Zone 1: Areas where explosive gas atmospheres are likely to occur during normal operation.
- Zone 2: Areas where explosive gas atmospheres are unlikely during normal operation, and only occur for short periods under abnormal conditions.
2. Container Structure – From Sealing to Ventilation
- Positive Pressure Explosion-Proof System
Zone 1 applications require a redundant fan system (N+1) with a backup power supply to ensure system operation. The standby fan has a fast gas replacement start-up mode and incorporates gas leakage detection and automatic power-off to ensure a safe positive pressure environment is maintained at all times inside the enclosure.
For Zone 2, a single-fan configuration can be used with adjustable start/stop strategies based on on-site risk levels and operating cycles, optimizing cost-performance balance.
- Sealing and Material Treatment
3. Electrical and Control System Explosion-Proof Strategies
- Selection of Electrical Components
- Control Logic Differentiation
4. External Interfaces and Explosion-Proof Penetrations
Every cable or pipe penetration is a potential leakage point—especially in high-risk Zone 1 areas—so safety measures must be implemented from the source:
- Cable entries must use explosion-proof cable glands (e.g., EExe certified) with secure compression seals.
- Pipework should use flexible connections with explosion-proof fittings to avoid damage from vibration or tension.
- All interface positions and routing must avoid high-temperature or high-vibration zones, while leaving sufficient maintenance space.
5. Design Adaptation Process – Starting from Risk Assessment
TLS participates in the client’s risk assessment process from the very beginning. Based on the area classification drawings provided, we develop targeted explosion-proof designs to ensure every detail meets the relevant standards.
Upon delivery, TLS also provides complete design drawings, interface documentation, and explosion-proof compliance files for client review and record-keeping.
Conclusion – True Adaptation is Safety in the Details
Adapting to Zone 1 and Zone 2 requirements is not simply a matter of choosing different components—it requires a holistic approach to container structure, ventilation, electrical systems, and safety logic.
Through project-based design, component-level certification, and system-level validation, TLS ensures every explosion-proof container is not only compliant but also safe, reliable, and maintainable.
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
Keywords：#Explosion-Proof Containers,#Zone 1 Safety Design,#Zone 2 Hazardous Area,#Positive Pressure System,#N+1 Redundancy,#Gas Purge Strategy,#ATEX Certification,#IECEx Standards,#Hazardous Area Equipment,#Offshore Safety Solutions
Written by Snowy
In high-risk experimental environments involving hazardous chemicals, flammable gases, or explosive dust, positive pressure lab containers have become the go-to choice for research institutions, inspection units, and industrial lab projects. With their safety, stability, and controllability, these units offer a critical safeguard for personnel and processes.
However, a positive pressure lab container that’s truly “ready for use” is far more than just a fan installed in a steel shell. Its safety and performance hinge on the detailed engineering and quality behind every structural element.
At TLS, a specialized manufacturer of functional container systems, we have identified five key structural features that determine whether a positive pressure lab container is truly usable, reliable, and deliverable.
1. Airtight Structure – The Foundation of Everything
The primary requirement of a positive pressure lab container is the ability to maintain a stable internal pressure. This demands a high level of airtightness. TLS ensures this through:
2. Ventilation Interface and Air Duct Design
The direction of the air ducts and the location of the ventilation connections need to be determined at the design and manufacturing stage of the box, which plays a decisive role in the performance of the entire ventilation system.
TLS provides:
3. Explosion-Proof Electrical Interfaces and Cable Routing
For lab containers intended for Zone 1 or Zone 2 hazardous areas, the container must integrate with explosion-proof systems. TLS supports this by:
4. Safety Monitoring and System Compatibility
Safety monitoring is a key consideration in our lab container designs. Depending on client needs, we offer:
5. Customizable Modular Design
TLS lab containers feature a high degree of modularity, allowing flexible configuration based on project requirements:
Conclusion
A positive pressure lab container is not just a sealed box—it’s a carefully engineered system that integrates airtight construction, ventilation planning, electrical safety, monitoring readiness, and modular design.
TLS is dedicated to the development and manufacturing of functional containers and explosion-proof safety modules. With extensive industry experience, we work closely with clients to deliver high-standard lab environments that are safe, tailored, and field-ready.
TLS Offshore Containers / TLS Energy is a global supplier of standard and customised containerised solutions.
Wherever you are in the world TLS can help you, please contact us.
Keywords:#Positive pressure lab container,#Airtight enclosure,#Hazardous material testing,#Explosion-proof design,#Zone 1 Zone 2 compliance,#Modular lab unit,#Ventilation interface,#Industrial lab safety,#Pressurized laboratory container,#Custom container solutions,#IECEx compliant,#Functional container manufacturer,#Containment system,#Safe lab environment,#Lab container integration
However, a positive pressure lab container that’s truly “ready for use” is far more than just a fan installed in a steel shell. Its safety and performance hinge on the detailed engineering and quality behind every structural element.
At TLS, a specialized manufacturer of functional container systems, we have identified five key structural features that determine whether a positive pressure lab container is truly usable, reliable, and deliverable.
1. Airtight Structure – The Foundation of Everything
The primary requirement of a positive pressure lab container is the ability to maintain a stable internal pressure. This demands a high level of airtightness. TLS ensures this through:
- Double-layer sealing strips on doors for enhanced closure tightness
- Airtight cable gland systems at pipe entry points
- Full-welded seams with thorough inspection and repair to eliminate leaks
- Reinforced sealing components on doors, hatches, and viewing windows
2. Ventilation Interface and Air Duct Design
The direction of the air ducts and the location of the ventilation connections need to be determined at the design and manufacturing stage of the box, which plays a decisive role in the performance of the entire ventilation system.
TLS provides:
- Standard or customized ducting interfaces (supporting top-down, side-top, or other configurations)
- Optimized internal air paths based on airflow volume and pressure specifications
- Well-planned duct layouts that improve system stability, prevent uneven airflow, and reduce the risk of equipment overload or dead zones
3. Explosion-Proof Electrical Interfaces and Cable Routing
For lab containers intended for Zone 1 or Zone 2 hazardous areas, the container must integrate with explosion-proof systems. TLS supports this by:
- Providing cable entry fittings compliant with Ex e or Ex d standards
- Pre-installing or reserving mounting supports for explosion-proof lighting, distribution boxes, and control panels
- Pre-routing cable trays and electrical paths based on customer drawings
- Ensuring internal wiring follows IECEx structural guidelines, making on-site integration fast and compliant
4. Safety Monitoring and System Compatibility
Safety monitoring is a key consideration in our lab container designs. Depending on client needs, we offer:
- Sensor installation ports: The system is equipped with smoke sensors, differential pressure sensors and temperature sensors to achieve safety monitoring and environmental linkage control. In response to customers' personalized demands, we can also reserve additional sensor installation holes as required to facilitate future expansion and functional upgrades.
- Cooperation on safety device integration: Our team actively assists with the installation of emergency stop buttons, audible/visual alarms, and fire suppression systems
5. Customizable Modular Design
TLS lab containers feature a high degree of modularity, allowing flexible configuration based on project requirements:
- Dimensions can follow standard ISO footprints (10ft/20ft/40ft) or be fully customized
- Options to add observation windows, access doors, and maintenance hatches
- Support for multi-container linkage and rapid field deployment through modular connections
Conclusion
A positive pressure lab container is not just a sealed box—it’s a carefully engineered system that integrates airtight construction, ventilation planning, electrical safety, monitoring readiness, and modular design.
TLS is dedicated to the development and manufacturing of functional containers and explosion-proof safety modules. With extensive industry experience, we work closely with clients to deliver high-standard lab environments that are safe, tailored, and field-ready.
TLS Offshore Containers / TLS Energy is a global supplier of standard and customised containerised solutions.
Wherever you are in the world TLS can help you, please contact us.
Keywords:#Positive pressure lab container,#Airtight enclosure,#Hazardous material testing,#Explosion-proof design,#Zone 1 Zone 2 compliance,#Modular lab unit,#Ventilation interface,#Industrial lab safety,#Pressurized laboratory container,#Custom container solutions,#IECEx compliant,#Functional container manufacturer,#Containment system,#Safe lab environment,#Lab container integration
Write by Snowy
In high-risk industries such as energy, chemicals, energy storage, and intelligent manufacturing, pressurized explosion-proof containers are widely used to house critical equipment like electrical control systems, lithium batteries, and sensor modules.
One common question from clients is:
“If a device or battery inside the container catches fire or explodes, will flames or sparks leak into the external environment and cause greater danger?”
As a specialized manufacturer of functional explosion-proof containers, TLS addresses this concern from four key safety design perspectives:
1. Sealed & Reinforced Structure: First Line of Defense
TLS pressurized containers are built using weather-resistant steel and high-performance sealing components, including explosion-proof locks, cable glands, and dual-seal strips. Together, they form a highly airtight and pressure-resistant enclosure.
Even if internal equipment ignites or experiences a short-term deflagration, the structure effectively contains flames, sparks, and high-temperature gases, protecting the external environment.
All TLS pressurized containers are designed and manufactured in accordance with relevant explosion-proof standards (such as IEC 60079-13), meeting or exceeding industry-grade anti-explosion performance.
2. Pressurization System: Blocking External Gases and Monitoring Abnormalities
The core function of the pressurization system is to maintain internal pressure above ambient pressure, preventing flammable gases from entering and forming explosive mixtures with internal components.
TLS pressurization systems are equipped with:
When anomalies occur (e.g. fire, pressure drop, gas concentration exceeding threshold), the system will immediately trigger alarms and initiate emergency measures like power shutdown or Close fire dampers—intervening before the situation escalates.
3. Explosion-Proof Electrical Selection: Controlling Hazards at the Source
Typical electrical components inside a TLS pressurized container include:
Based on the risk level, TLS applies suitable explosion-proof strategies:
This “hazard-source control” approach greatly reduces fire or explosion risks at the component level.
4. On the explosion relief device: why we choose "prevention-oriented"
It is worth noting that: explosion relief device is not a standard feature of the positive pressure explosion-proof box (TLS is generally not equipped), in the structure of the double security of airtight and positive pressure system, the risk of flame or spark leakage to the outside has been effectively controlled.Avoiding the reactive approach of "after-the-fact reliance".
For extreme applications, such as high-capacity battery testing, high-pressure chemical reaction experiments, etc., TLS can also be customised to incorporate additional safety modules, such as directional exhaust systems or automatic fire extinguishers, to cope with the specific extreme conditions, if the customer requires a very high level of individual protection.However, this is not a standard feature.
5.Conclusion: A Systematic and Reliable Line of Safety Defense
Facing the complex risks of flammable and explosive environments, TLS’s pressurized explosion-proof containers are designed with a system-level safety philosophy—combining sealed structure, intelligent pressure control, electrical explosion protection, and optional emergency systems to deliver safe, reliable, and sustainable containerized environments.
At TLS, containers are not just equipment enclosures—they are your first line of safety.
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.
Keywords :#Pressurized explosion-proof container,#Fire containment,#Lithium battery safety,#IEC 60079-13,#Hazardous area protection,#Containerized control room,#Intrinsic safety,#Explosion-proof design,#Industrial container solutions,#Overpressure system,#Emergency ventilation,#Spark containment,#Modular safety enclosure,#Vent panel (optional),#Electrical hazard isolation
One common question from clients is:
“If a device or battery inside the container catches fire or explodes, will flames or sparks leak into the external environment and cause greater danger?”
As a specialized manufacturer of functional explosion-proof containers, TLS addresses this concern from four key safety design perspectives:
1. Sealed & Reinforced Structure: First Line of Defense
TLS pressurized containers are built using weather-resistant steel and high-performance sealing components, including explosion-proof locks, cable glands, and dual-seal strips. Together, they form a highly airtight and pressure-resistant enclosure.
Even if internal equipment ignites or experiences a short-term deflagration, the structure effectively contains flames, sparks, and high-temperature gases, protecting the external environment.
All TLS pressurized containers are designed and manufactured in accordance with relevant explosion-proof standards (such as IEC 60079-13), meeting or exceeding industry-grade anti-explosion performance.
2. Pressurization System: Blocking External Gases and Monitoring Abnormalities
The core function of the pressurization system is to maintain internal pressure above ambient pressure, preventing flammable gases from entering and forming explosive mixtures with internal components.
TLS pressurization systems are equipped with:
- Pressure sensors and differential pressure alarms
- Combustible gas detection instruments
- Automated ventilation and power-off linkage
When anomalies occur (e.g. fire, pressure drop, gas concentration exceeding threshold), the system will immediately trigger alarms and initiate emergency measures like power shutdown or Close fire dampers—intervening before the situation escalates.
3. Explosion-Proof Electrical Selection: Controlling Hazards at the Source
Typical electrical components inside a TLS pressurized container include:
- Lithium battery systems
- DC/AC converters and inverters
- PLC or DCS control cabinets
Based on the risk level, TLS applies suitable explosion-proof strategies:
- Intrinsic safety (Ex i) for low-power control devices
- Flameproof (Ex d) or increased safety (Ex e) enclosures for high-power units
- Fireproof partitions or isolation chambers for lithium batteries and other sensitive modules
This “hazard-source control” approach greatly reduces fire or explosion risks at the component level.
4. On the explosion relief device: why we choose "prevention-oriented"
It is worth noting that: explosion relief device is not a standard feature of the positive pressure explosion-proof box (TLS is generally not equipped), in the structure of the double security of airtight and positive pressure system, the risk of flame or spark leakage to the outside has been effectively controlled.Avoiding the reactive approach of "after-the-fact reliance".
For extreme applications, such as high-capacity battery testing, high-pressure chemical reaction experiments, etc., TLS can also be customised to incorporate additional safety modules, such as directional exhaust systems or automatic fire extinguishers, to cope with the specific extreme conditions, if the customer requires a very high level of individual protection.However, this is not a standard feature.
5.Conclusion: A Systematic and Reliable Line of Safety Defense
Facing the complex risks of flammable and explosive environments, TLS’s pressurized explosion-proof containers are designed with a system-level safety philosophy—combining sealed structure, intelligent pressure control, electrical explosion protection, and optional emergency systems to deliver safe, reliable, and sustainable containerized environments.
At TLS, containers are not just equipment enclosures—they are your first line of safety.
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.
Keywords :#Pressurized explosion-proof container,#Fire containment,#Lithium battery safety,#IEC 60079-13,#Hazardous area protection,#Containerized control room,#Intrinsic safety,#Explosion-proof design,#Industrial container solutions,#Overpressure system,#Emergency ventilation,#Spark containment,#Modular safety enclosure,#Vent panel (optional),#Electrical hazard isolation
