A curtain stops sparks travelling outward. It does nothing to stop gas travelling inward, which is fine in a workshop and completely inadequate where the surrounding atmosphere may contain hydrocarbon vapour.

A habitat is a sealed enclosure held at positive pressure with continuous gas monitoring and automatic shutdown. Because the inside is at higher pressure, air flows outward through every gap rather than inward, so flammable gas outside cannot migrate in. That pressure differential is the entire safety mechanism.

Because both ends of the band matter. Below it, ordinary air movement outside can overcome the differential and the barrier stops working. Above it, the enclosure strains at its seams and doors become difficult to operate.

The pressure is monitored on a gauge, and loss of pressure is one of the four automatic shutdown triggers rather than an alarm for somebody to assess. If the differential is gone, the protection is gone.

To leave margin. Ten percent of the lower explosive limit means the system acts while the atmosphere is still far outside the range at which it could ignite.

Setting the trigger closer to the actual flammable limit would give less time to shut down, investigate and clear the enclosure. In an environment where the consequence of getting it wrong is catastrophic, the conservative setpoint is the correct engineering choice rather than an excess of caution.

All electrical appliances and air tools inside the habitat are switched off automatically, without waiting for a person to assess the situation and act.

The four triggers are gas detection above setpoint, loss of positive pressure, manual emergency isolation stop, and failure of the monitoring or air supply equipment itself. That last one matters, because a system that cannot verify conditions is not providing protection whatever it displays.

No. It is one control within a permit to work system, not a substitute for one. Gas testing, permit authorisation, competent supervision and the operator's own procedures all still apply.

Deployment, setpoints and operating procedures must be assessed against the specific installation by competent personnel and must satisfy the facility operator and the relevant regulator. Any supplier suggesting otherwise is describing a product they do not understand.

Against the alternative that would otherwise be required, which is shutting the process down, purging, proving the area gas free, working, and starting back up.

On a producing asset the deferred production during that sequence is lost permanently rather than recovered later, and for a two hour welding job the surrounding shutdown can consume days. The habitat is typically recovered on the first deployment, which is why the purchase is usually approved by whoever owns production uptime rather than by the safety equipment budget.

Yes, through detachable sleeve type penetration panels that let pipework, cabling, hoses and structure pass through the wall while maintaining the seal around them.

This is the detail that decides whether a habitat is usable on a real installation, since almost no work area is a clean empty box. Additional penetration panels are available on request, so tell us what crosses your boundary at inquiry stage rather than discovering it during assembly.

Rapid egress. They open quickly to create an exit through the enclosure wall, so that leaving does not depend on reaching the normal door.

In a sealed pressurised enclosure with people working inside, the ability to open a wall fast is a safety function rather than a convenience, and it should not rely on a single access point remaining reachable.

Because the blower sits in the hazardous area, outside the protection the habitat provides. Equipment capable of igniting the atmosphere it is protecting against would defeat the entire arrangement.

The Zone 1 explosion proof electric drum maintains both the positive pressure and sufficient airflow through the enclosure, which also keeps conditions workable for the crew inside.

Yes, for minor tears and abrasions. Repair tools are supplied with the habitat so that damage can be made good in place rather than taking the enclosure out of service and shipping it away.

Any damage affecting the seal integrity should be assessed before the habitat returns to service, since the pressure differential depends on the enclosure being intact.

Longer than our catalogue products, because each habitat is configured to a specific work area and panel set rather than built to a standard specification.

Send the work area details and requirements early. The configuration discussion is normally the longest part of the process, not the manufacturing, and operator specific requirements frequently shape the specification more than ours do.

Payment is normally by T/T, structured as a deposit with the balance settled before shipment. We confirm the exact split with your quotation.

EXW, FOB, CIF and DAP terms are all available, so you can pick whichever fits how your freight is already arranged. If you have a nominated forwarder we will work with them directly.