Overview
This article evaluates the advanced "MCC Switchgear Pressurised Shelter Solution" designed for heavy-duty industrial, onshore, and offshore environments. By integrating custom-engineered shipping containers with active HVAC pressurization, specialized fire and gas detection, and robust structural compliance, TLS provides an all-in-one plug-and-play solution. This design protects sensitive, non-explosion-proof electrical equipment against harsh climates and hazardous gas atmospheres.

Key Questions Answered in This Guide
  1. What unique challenges do standard electrical switchgears face in offshore or hazardous environments?
  2. How do the standard and custom sizing metrics of TLS shelters accommodate complex site constraints?
  3. What specific structural codes and safety standards govern these localized equipment rooms?
  4. Why do past operational failures highlight the necessity of integrated turnkey engineering?

The Critical Role of Pressurized Electrical Shelters
In modern industrial landscapes—particularly in offshore oil platforms, maritime operations, and chemical processing facilities—protecting high-value electrical assets is a foundational safety mandate. Systems like Motor Control Centers (MCC), Switchgears, Motor Circuit Protection (MCP), Variable Frequency Drivers (VFD), and Variable Speed Drivers (VSD) form the backbone of field operations.

However, this sophisticated equipment is often non-explosion-proof. When deployed into environments with corrosive sea spray, extreme temperatures, or volatile ambient gases, unshielded electronics are prone to rapid degradation and catastrophic arc-flash triggers.

The "MCC Switchgear Pressurised Shelter Solution.pdf" addresses this vulnerability by housing components within a weather-resistant, walk-in containerized module. By maintaining a positive internal pressure gradient, the shelter mechanically prevents external hazardous gases and dust from infiltrating the clean electrical staging environment.

Technical Specifications and Dimensional Versatility
Engineering flexibility is crucial for adapting to variable deck spaces or onshore footprints. TLS builds its shelters around highly scalable, modular designs that can be altered based on equipment volume and site installation requirements.

The regular module dimensions feature standard configurations with uniform width profiles alongside variable heights (2591 mm or 2896 mm) to accommodate tall switchgear lineups:
  • 15ft Module Dimensions: Length of 4572 mm, width of 2438 mm, and heights of either 2591 mm or 2896 mm.
  • 20ft Module Dimensions: Length of 6058 mm, width of 2438 mm, and heights of either 2591 mm or 2896 mm.
  • 40ft Module Dimensions: Length of 12096 mm, width of 2438 mm, and heights of either 2591 mm or 2896 mm.

Beyond these standard baselines, customized special sizes are frequently engineered to construct dedicated shelter rooms tailored for non-standard or oversized equipment configurations.

Standards, Applications, and Architectural Features

Target System Applications
The shelter operates as a centralized control hub capable of housing a diverse range of critical sub-systems:
  • Medium Voltage (MV) and Low Voltage (LV) switchgears are arranged in fixed, compartmentalized, or withdrawable units.
  • Centralized control panels incorporating Programmable Logic Controllers (PLC), MCC, and remote monitoring/operation infrastructure.
  • Auxiliary field equipment essential to localized power distribution.

Safety and Structural Standards
To withstand aggressive physical handling and high-consequence operational zones, the architectural design complies with strict international benchmarks:
  • Structural Integrity: Built in accordance with DNV2.7-1 and EN12079 structural design codes. The inclusion of dedicated ISO corner castings and integrated pad-eyes guarantees secure crane and vessel handling during onshore or offshore loading operations.
  • Hazardous Zone: Certified for installation across Safe Areas, Zone 2, and Zone 1 hazardous environments.
  • Electrical & Thermal Compliance: Complies strictly with the IEC60079-13 standard for pressurized room protection. Thermal and passive fire safety is reinforced with an A60-rated passive fire protection barrier.

Integrated Life Safety Features
Every module functions as an active safety device featuring an interconnected web of protection mechanisms:
  • Environmental Controls: Heavy-duty HVAC systems paired with automatic, fail-safe fire dampers manage temperature and airflow.
  • Monitoring Systems: A unified, combined pressurization fire and gas panel works continuously alongside dedicated fire and gas detection hardware.
  • Personnel Security: Entryways are secured with specialized air-lock door systems to prevent pressure loss during entry/exit, while emergency egress is supported via a built-in escape hatch and onboard fire extinguishers.
  • Infrastructure Utilities: Outfitted with baseline internal electrical cabling, high-visibility lighting systems, and utility sockets.

Key Performance Observations and Historical Lessons

Quantifiable Operational Metrics
Field assessments under harsh testing criteria demonstrate the efficiency of this integrated design approach. Comprehensive sea-worthy packing combined with standardized ISO dimensions minimizes transport friction across maritime and road freight channels. On-site deployment timelines indicate that the inclusion of plug-and-play plugin connections, backed by detailed installation manuals, reduces local installation overhead and configuration errors by significant margins when compared to traditional stick-built field rooms.

Aggregated Lessons from Industrial Failures
Historically, the decentralized procurement of individual system components (sourcing enclosures, HVAC, and fire panels from separate vendors) has led to systemic field integration failures. Industry data reveals several common failure modes that this all-in-one solution corrects:
  • Loss of positive pressure containment due to misaligned door seals or uncoordinated HVAC pressure balancing.
  • Delayed fire damper actuation caused by communication lag between third-party gas detectors and main control relays.
  • Premature structural buckling or corrosion failure around lift points on non-certified containers during high-seas transfers.

By providing a single-source solution covering everything from initial structural fabrication to final system integration, TLS eliminates these multi-vendor incompatibilities.

Key Takeaways of the TLS Shelter Solution
  • Comprehensive Protection: Protects standard, non-explosion-proof electronics from destructive external climates and hazardous vapors.
  • Rigorous Certification: Built to satisfy DNV2.7-1, EN12079, A60 fire ratings, and IEC60079-13 international standards.
  • Flexible Engineering: Available in standard 15ft, 20ft, and 40ft frames, as well as customized footprints tailored to specific project needs.
  • Turnkey Delivery: Streamlines field deployment via integrated plugin interfaces and single-source design-to-fabrication quality control.
 
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.

Product brochures:
Offshore total pressurised container solutions
Offshore pressurised mud logging cabin brochure
MCC | Switchgear | VFD | VSD pressurised shelter
 
 
Keywords: #Pressurized electrical shelter, #DNV 2.7-1 switchgear container, #IEC 60079-13 compliance room, #Offshore MCC shelter solution, #Zone 1 hazardous area enclosure, #Containerized VFD shelter, #A60 fire rated module, #Motor Control Center blast shelter, #Plug and play electrical substation container, #Custom offshore switchgear housing

Written by Oliver

There's a number the industry rarely says out loud: roughly 90% of liquid cooling failures trace back to the piping system. Not the CDU. Not the cold plates. The pipes, fittings, and the connections between them. Understanding why — and how the same failure modes migrate into Battery Energy Storage System (BESS) thermal management — is essential for anyone designing infrastructure where heat removal is mission-critical.

The Hidden Failure Chain in Liquid Cooling

Most cooling incidents don't announce themselves dramatically. They begin quietly: a fitting that wasn't torqued to spec, a weld with a hairline defect, a pocket of trapped air causing a water hammer event at 2 AM. By the time the leak is visible, a cascade is already in motion — downtime, equipment damage, and replacement costs that dwarf what proper design would have cost.
The root cause is almost always a gap between disciplines. HVAC engineers understand fluid dynamics but not the uptime requirements of critical infrastructure. Data center operators know their SLAs but not pipe schedules. BESS integrators, under pressure to hit energy density targets, often treat thermal management as a secondary system — until it isn't.

Material Selection: Getting the Foundation Right

Three material families dominate liquid cooling piping, each with a specific role:
Stainless steel (304/316L) is the backbone of primary circuits. With a service life exceeding 20 years and excellent corrosion resistance, 316L is the preferred choice where chloride exposure is a risk — common in coastal BESS installations. The trade-off is weight and cost.
Specialty thermoplastic pipe (PP-R) handles secondary, low-pressure circuits effectively. It's roughly one-third to one-half the cost of stainless, installs quickly via heat fusion, and presents low flow resistance. But it's pressure-limited (generally PN ≤ 2.0 MPa) and degrades above 70°C — a constraint that matters in high-density BESS configurations where ambient temperatures inside enclosures can spike.
Flexible braided hose absorbs vibration and compensates for thermal expansion at equipment connection points. Quality matters enormously here; substandard liners develop microcracks within months.
A reliable combination: 316L stainless for main runs, PP-R for branch circuits, and stainless braided flex at CDU and battery module interfaces.

Fittings Are Where Leaks Live
Over 60% of piping leaks originate at joints. Compression fittings require torque wrenches and manufacturer-specified values — under-tightened fittings seep, over-tightened ones deform. Flanged connections above DN50 need EPDM gaskets (rated –40°C to +150°C) tightened in a cross-pattern across three passes. Field welds demand 100% radiographic or dye-penetrant inspection on critical joints; weld quality is highly dependent on the welder, ambient wind, and humidity at the time of execution.

Sizing, Slope, and the Air Problem
Flow velocity dictates both efficiency and longevity. In primary circuits (CDU to dry cooler), target 1.5–3.0 m/s. Secondary circuits (CDU to rack or battery module) run better at 0.5–1.5 m/s. A useful first estimate: pipe diameter (mm) ≈ √(flow rate in L/min ÷ 0.3).
Trapped air is the silent degrader. Bubbles reduce heat transfer, cause flow imbalance, and damage pump impellers through cavitation. Every high point in the circuit needs an automatic air vent. Pipe runs should slope upward at least 0.3% in the direction of flow. At system commissioning, fill at 30% of design flow rate and hold for two to four hours before ramping up — rushing this step embeds micro-bubbles that are nearly impossible to purge later.

Applying This to BESS Thermal Management
Battery cells are far less forgiving than servers. A lithium-ion cell operating outside its thermal window — typically 15°C to 35°C — degrades faster, loses capacity, and in extreme cases enters thermal runaway. The TMS for a BESS is therefore not comfort infrastructure; it is a safety system.

Liquid cooling architectures for BESS fall into two main configurations: direct cold-plate cooling (coolant channels integrated into module housings) and indirect liquid cooling with a secondary glycol-water loop. The latter is more common at utility scale, using a circuit architecture nearly identical to data center liquid cooling — CDU-equivalent, distribution manifolds, and per-rack (per-module) supply and return.
Key BESS-specific TMS design considerations:
  • Cell-level temperature uniformity matters more than average temperature. A ΔT above 5°C across a module accelerates imbalanced aging and capacity fade. Piping design must ensure balanced flow to every module — this requires careful manifold geometry and, in larger systems, pressure-independent control valves per branch.
  • Freeze protection is non-negotiable for outdoor BESS enclosures. Glycol concentration must be sized for the site's design minimum ambient temperature, with a safety margin. Pipe routing within enclosures should minimize exposure to cold zones, and heat tracing may be required in extreme climates.
  • Vibration isolation is more demanding than in static data center environments. BESS containers on skids or floating foundations experience movement; all module connections need flexible elements and adequate support spacing to prevent fatigue failure.
  • Leak detection integration should be specified at the system level, not added as an afterthought. BESS enclosures typically have limited drainage paths; even a small leak can accumulate and create electrical hazards. Sensor strips beneath manifolds and at low points, tied to automatic shutoff valves, are standard practice in well-designed systems.
  • CDU sizing follows the same logic as data center applications: total battery pack heat rejection capacity × 1.1–1.2 safety factor, with redundant pump sets (N+1 minimum) and dual CDU configurations for systems above 1 MWh.

Periodically Inspection Protocol
Regardless of application — data center or BESS — the maintenance discipline is the same. Visually inspect all visible fittings for crystalline deposits or moisture. Check flexible hose for bulging or surface cracking, especially at attachment points. Confirm automatic air vents are cycling correctly. Log CDU inlet/outlet temperatures, flow rates, and pressures against baseline. Verify expansion tank levels. Listen to pumps for cavitation noise or bearing roughness. Test coolant conductivity and pH monthly.
Thermal management is not a set-and-forget system. The infrastructure that moves heat away from billions of dollars of batteries and compute deserves the same engineering rigor as the assets it protects.
In industries such as oil and gas exploration, marine engineering, mining development, environmental monitoring, and industrial testing, an increasing number of laboratory and analytical activities are shifting from traditional fixed facilities to on-site, modular solutions. Laboratory Containers have become an important platform for conducting field testing, data analysis, and sample processing.

However, when selecting a laboratory container solution, many users face several practical questions:
  • What are the core systems that make up a laboratory container?
  • How can laboratory equipment operate reliably in harsh environments?
  • What certifications and safety standards must a laboratory container meet?
  • How should different projects choose the most suitable laboratory container solution?
This article introduces the structural components, operating principles, certification requirements, and application scenarios of laboratory containers to help users better understand their design philosophy and practical value.

A Laboratory Container Is More Than Just a Container

Many people assume that a laboratory container is simply a shipping container with laboratory equipment installed inside.

In reality, a complete laboratory container functions as a mobile laboratory environment that must simultaneously meet the requirements of equipment operation, personnel safety, and laboratory management.

1. Container Structure System

As the physical platform for laboratory equipment, the container structure must provide:
  • Sufficient structural strength
  • Effective thermal insulation
  • Corrosion resistance
  • Long-term transportation and lifting capability
For offshore projects and remote-site operations, structural integrity is often one of the most critical design considerations.

​2. Power and Electrical Distribution System

Laboratory equipment often requires a highly stable power supply.
A laboratory container is typically equipped with:
  • l Main power distribution system
  • l Grounding system
  • l Emergency power connection interface
These systems help ensure continuous operation of critical equipment during power fluctuations or interruptions.

3. Ventilation and Environmental Control System

Environmental stability directly affects testing accuracy and data reliability.
Depending on project requirements, a laboratory container may be equipped with:
  • HVAC air conditioning system
  • Fresh air system
  • Exhaust ventilation system
  • Positive pressure system
  • Negative pressure system
By controlling temperature, humidity, and airflow direction, these systems create a stable environment for laboratory operations.

4. Safety Monitoring System
For applications involving hazardous gases or specialized laboratory processes, the following systems are commonly integrated:
  • Combustible gas detectors
  • H₂S detectors
  • Smoke detectors
  • Fire alarm systems
  • Emergency Shutdown (ESD) systems
These features enhance operational safety and reduce potential risks during laboratory activities.

How Does a Laboratory Container Work?

The primary objective of a laboratory container is to create a stable and controlled operating environment for laboratory equipment.
Its typical operating process includes the following steps:

Step 1: Parameter Configuration

Operators set the required operating conditions, including:
  • Temperature
  • Humidity
  • Ventilation rate
  • Pressure conditions
according to the testing requirements.

Step 2: Environmental Control

The HVAC, ventilation, and pressure control systems automatically operate based on the preset values to maintain a stable laboratory environment.

Step 3: Testing and Monitoring

Once the laboratory equipment begins operating, various sensors continuously monitor:
  • Temperature
  • Pressure
  • Gas concentration
  • Equipment status
to ensure that testing conditions remain within specified limits.

Step 4: Data Collection and Recording

Test data can be monitored and stored in real time through:
  • PLC systems
  • Industrial computers
  • SCADA systems

Step 5: Alarm and System Interlock

If abnormal conditions occur, the system can automatically:
  • Activate audible and visual alarms
  • Start emergency ventilation
  • Shut down designated equipment
to protect personnel and laboratory assets.

What Standards and Certifications Must a Laboratory Container Meet?

For industrial applications, laboratory containers must comply not only with functional requirements but also with relevant regulations and industry standards.
Common standards include:

1. Quality Management
ISO 9001, which ensures quality control throughout the design and manufacturing process.

2. Electrical and Equipment Safety
CE, UL, and relevant IEC standards, which verify electrical safety and regulatory compliance.

3. Hazardous Area Applications
When a laboratory container is installed in hazardous locations, explosion protection requirements such as the following may apply: ATEX& IECEx

4. Offshore and Marine Projects
For offshore laboratory containers, additional structural and transportation certifications may be required, including:DNV 2.7-1 & EN 12079& CSC

What Applications Are Laboratory Containers Suitable For?

As demand for on-site testing continues to increase, laboratory containers are now widely used across multiple industries.
  • Oil and Gas Industry
Drilling fluid analysis, sample testing, gas analysis, and other field laboratory operations.
  • Marine Engineering
Marine environmental monitoring, water quality analysis, and material testing.
  • Mining and Metallurgy
Ore sample analysis, grade testing, and process validation.
  • Environmental Monitoring
Mobile applications for air quality monitoring, soil analysis, and water quality testing.

Conclusion: What Should You Focus on When Selecting a Laboratory Container?

For field testing and laboratory applications, a laboratory container is not merely a space for equipment installation. It is a critical platform that supports testing accuracy, operational safety, and overall efficiency.

When evaluating a laboratory container solution, it is recommended to focus on the following factors:
  • Environmental Control Capability
Whether the system can maintain stable temperature, humidity, ventilation, and pressure conditions.
  • Safety System Configuration
Whether gas detection, fire alarm, and emergency interlock systems are properly integrated.
  • Certification and Compliance
Whether the container meets the applicable standards and certification requirements of the project location and industry.
  • Customization Capability
Whether the design can be tailored to laboratory workflows, equipment dimensions, and site-specific environmental conditions.

The value of a laboratory container extends beyond housing laboratory equipment. Its true purpose is to provide a safe, stable, and sustainable working environment for on-site testing and analysis. For projects that increasingly rely on real-time data and rapid decision-making, a properly designed laboratory container can significantly improve operational efficiency and data reliability.

Please download the Laboratory container brochure for reference.

Keywords:#Laboratory Container, #Containerized Laboratory, #Mobile Laboratory Container, #Offshore Laboratory Container, #Modular Laboratory Solution,  #Field Testing Laboratory, #Hazardous Area Laboratory Container, #Environmental Monitoring Laboratory

Written by Snowy