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Land-based oil exploration and offshore platform oil exploration areas have the potential to produce explosive gases, and for areas where fires and explosions may occur are known as hazardous areas and are generally divided into three zones - Zone 0, Zone 1, and Zone 2.  Modern drilling and exploration sites require strict explosion-proof performance of the equipment on site, so TLS provides the perfect solution with positive pressure explosion-proof containers 
 
The principle of the positive pressure explosion-proof container is to achieve explosion-proof technical requirements through the container shell, so that all the regular non-explosion-proof machinery installed in the container achieve the purpose of explosion-proof.
 
The positive pressure ventilation system ​ is the key to making the container explosion-proof. When the total power supply is turned on, firstly the system automatically turns on the explosion-proof blast system. The explosion-proof centrifugal fan extracts fresh air from 30 meters outside the danger zone into the positive pressure container. The air in the positive pressure container is purged and a positive pressure of more than 50pa is established. The total power supply is automatically turned on when the control conditions are met, then the power supply can be turned on to control the power supply and turn on other electrical equipment in the positive pressure container.
 
In the process of turning on or in the operation of the equipment in the container, if the explosion-proof control system monitors the presence of dangerous gases in the container or fails to reach the corresponding positive pressure, the alarm system will alarm and warn, and if the control conditions in the container are still not met within the specified time, or if the alarm limits are reached directly, the non-explosion-proof control system in the container will be closed automatically, so as to achieve the purpose of explosion-proof.

Intelligent pressurized containers can provide a safe environment for equipment and people in hazardous areas. The principle of a positive pressure EX-proof cabin is to achieve the technical requirements of blast-proofing through enclosure. A positive pressure ventilation system is the key.
It delivers fresh air from a safe area to the container through ducts that pure the air inside the container and maintain a slightly higher air pressure inside the container than outside. In this condition, no harmful gas can enter the enclosure.
If the blast control system detects the presence of hazardous gases in the enclosure or fails to maintain positive pressure, the alarm system will sound an alarm and issue a warning. If the control conditions inside the container are still not required within the specified time, the non-explosive device will automatically cut off.
Thus, the common equipment in the container fulfils the purpose of blast protection.

​Motor control center (MCC) shelters consist of single or multiple electrical units, which are combined to meet larger application needs. These components allow engineers to control electric motors from a central location, such as a mechanical or electrical room.
MCCs are typically found in large commercial or industrial buildings and typically contain motor starters, circuit breakers, programmable controllers, metering devices, etc. MCCs may be used in any facility that operates a large number of electric motors.
There is always the possibility or risk of fire or explosion when MCCs are used in, around or near flammable gases or vapors, flammable liquids, flammable dust, flammable fibers or droplets.
The MCC shelter provided by TLS integrates sensors, fire and gas systems, intelligent PLC, fire dampers, air conditioners, etc. in a positive pressure container environment, which helps isolate the control systems in the MCC shelter from the external hazardous environment and facilitates the operation of surrounding systems. Increase the safety factor of the construction environment.
The MCC shelter provided by TLS can meet DNV2.7-1| EN12079, pass third-party certification such as CCS and BV, and can be customized according to customer‘s requirements, which can also be used for Power control centre (PCC), Variable speed driver (VSD), Variable Frequency Drive (VFD) shelter. 

​Any requirements, please contact us directly:
E-mail: sales@tls-containers.com 
Hotline: +65-65637288; +65-31386967

TLS pressurised laboratory container brochure can be downloaded here. 

Key words:
#DNV  #BV  #DNV2.7-1  #ESS  #BESS   #A60 fire rating  #explosion-proof  #LAB # workshop container  #TLS offshore containers  #laboratory container

Positive pressure and negative pressure are relative to the pressure in the surrounding space.
 
Positive pressure: the air supply volume is greater than the exhaust volume. The indoor air is under positive pressure. Combined with the air conditioning unit, the cleanliness of the air sent into the container can be guaranteed.
Positive pressure is preferentially applied to containers where the external environment is harsh (such as ZONE 0, ZONE 1, and ZONE 2) and the internal environment is secure.
Please download the A60 offshore pressurised container product brochure for reference. 
 
Negative pressure: the air supply volume is less than the exhaust air volume, and the room is under negative pressure. The surrounding air flows into the space and is discharged through the exhaust outlet for unified treatment.
Negative pressure is preferred in containers where the external environment is safe but the interior will produce toxic and harmful gases.
​Please download laboratory container brochure for reference.