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BREX® = fire protection + flameless venting in one module

BREX® – the first product worldwide to combine fire protection and flameless explosion venting

 

So far, there has been no protective system combining both functions. Protecting enclosed spaces with both fire and explosion hazards (e.g. transformer rooms, containers or storerooms) usually involves structural modifications and investing a lot of money. And what's worse, in certain cases the standard precautions are not appropriate to satisfy safety requirements, as will be explained later.

 

The BREX® module developed by rexotec AG will be the first protective device on the market which was tested by an acknowledged German certification body and meets the requirements for flameless explosion venting devices and for building components rated fire resistance class F90/EI90 (i.e. 90 minutes fire resistance duration).

 

The patented BREX® system works reliably as a flame barrier, no matter what comes first: a fire or a rise in pressure.

Self-reclosing venting element

 

Currently available protective solutions for facilities at risk of explosion as well as fire typically rely on pressure venting and subsequent sealing of the affected compartment with self-closing fire barriers (e.g. explosion doors or panels). The compartment is then tightly closed. If an explosion or pressure rise occurs after the original incident, venting is no longer possible. This can result in significant damage to property and personal or even fatal injuries.

 

The BREX® module comes with self-reclosing venting covers, which reclose tightly immediately after each opening. In the event of a subsequent second pressure rise, the venting covers open again. This operation is repeatable an almost unlimited number of times and functions purely mechanically, i.e. without error-prone electric parts.

 

This makes the BREX® module the only building component rated F90/EI90 that ensures safe venting in the event of subsequent explosions or deflagrations.

BREX® = fire protection + flameless venting in one module
BREX® = fire protection + flameless venting in one module

1,000°C inside, under 100°C on the outside: for the duration of 90 minutes

 

Tests carried out by a notified body proved that the new system complies with the EN 1634-1 and 1634-3 requirements for F90/EI90 building components.

 

During the fire resistance testing, the temperature inside the fire compartment was 1,000°C. The BREX® module prevented flame emission and the temperature on the outside did not exceed 100°C during the 90-minute test.

 

The temperature of the combustion gases (which were reduced to a permissible limit) was not higher than that either.

 

The tremendous energy absorption potential of the flame-quenching element developed by rexotec became evident already during the EC Type Examination tests for the scubex® as flameless explosion venting device: while temperatures inside the housing reached approximately 1,500°C in tests with 99.5% aluminium dust, the surface temperature was measured to be below 100°C.

BREX® = fire protection + flameless venting in one module

Determination of the airflow volume

 

The airflow volume is measured for each version of the BREX® module. The resulting curve chart exactly shows the air or gas volume that passes through the module per unit time at a certain pressure. This is the basis for determining the number of BREX® modules required for any given application.

BREX® = fire protection + flameless venting in one module

Flow Simulation: we don't guess but calculate

 

We use state-of-the-art flow simulation software already in the development phase of our products. It offers the possibility to calculate and visualize e.g. the rate and direction of propagation of a pressure wave as well as the resulting pressure or temperature at any point of the device. The findings obtained with this method help us to both optimize our products and find appropriate protective solutions for our clients' plants.

The picture clearly shows that most of the pressure wave released after the opening of the venting covers spreads out along the outer surface of the protected vessel, almost nothing is released into the surrounding area. The risk of damage to property or injury is significantly reduced.

Technical information

 

 • Fire resistance class F90 acc. to DIN 4102-2, corresponding to EI90 acc. to EN 13501-2

 • completely dust-proof

 • highly gas-tight (leakage < 0.2 m³/h)

 • smoke-tight acc. to DIN EN 1634-3

 • Operating temperature: -40°C to 600°C

 • Vacuum stability: up to 200 mbar / 20,000 Pa

 • Opening pressure: default setting by manufacturer from 10 to 100 mbar (g)

 • Opening path of the venting covers: ≤ 120 mm

 • Dimensions: according to drawing

 

 

 

 

 

Flexible facility design thanks to integrated fire and explosion protection

 

The BREX® module is simply inserted into a wall opening of 550mm x 550mm and bolted directly to the wall. Several modules can be combined to form a larger element: an extremely space-saving solution, which almost disappears inside the wall.

 

The number of BREX® modules required depends, among other things, on the strength of the wall, the volume of the compartment and of course the items that are likely to cause fire or a pressure increase. Computer simulation, which delivers sufficiently accurate results, is used to help design the appropriate protection for each plant.

 

A side effect of the BREX® module is an improved noise insulation.

Of course the BREX® module can also be used to upgrade existing facilities.

 

 

 

 

 

We will be glad to help you plan and design the appropriate explosion protection solution for your plant and determine the devices that best suit your specific needs. Contact us to discuss your options and receive a non-binding offer—our competence and cost-efficiency will convince you.

 

 

BREX® = fire protection + flameless venting in one module
BREX® = fire protection + flameless venting in one module
BREX® = fire protection + flameless venting in one module
BREX® = fire protection + flameless venting in one module
BREX® = fire protection + flameless venting in one module
BREX® = fire protection + flameless venting in one module
BREX® = fire protection + flameless venting in one module
BREX® = fire protection + flameless venting in one module
BREX® = fire protection + flameless venting in one module
BREX® = fire protection + flameless venting in one module
BREX® = fire protection + flameless venting in one module
BREX® = fire protection + flameless venting in one module

Protection in case of subsequent explosions

Currently available protective solutions for facilities at risk of explosion as well as fire typically rely on pressure venting and subsequent sealing of the affected compartment with self-closing fire barriers (e.g. explosion doors or panels). The compartment is then tightly closed. If an explosion or pressure rise occurs after the original incident, venting is no longer possible. This can result in significant damage to property and personal or even fatal injuries.

The BREX® module comes with self-reclosing venting covers, which reclose tightly immediately after each opening. In the event of a subsequent second pressure rise, the venting covers open again. This operation is repeatable an almost unlimited number of times and functions purely mechanically, i.e. without error-prone electric parts.

 

This makes the BREX® module the only building component rated F90/EI90 that ensures safe venting in the event of subsequent explosions or deflagrations.

1,000°C inside, under 100°C on the outside: for the duration of 90 minutes

Tests carried out by a notified body proved that the new system complies with the EN 1634-1 and 1634-3 requirements for F90/EI90 building components.

 

During the fire resistance testing, the temperature inside the fire compartment was 1,000°C. The BREX® module prevented flame emission and the temperature on the outside did not exceed 100°C during the 90-minute test.

 

The temperature of the combustion gases (which were reduced to a permissible limit) was not higher than that either.

 

The tremendous energy absorption potential of the flame-quenching element developed by rexotec became evident already during the EC Type Examination tests for the scubex® as flameless explosion venting device: while temperatures inside the housing reached approximately 1,500°C in tests with 99.5% aluminium dust, the surface temperature was measured to be below 100°C.

Determination of the airflow volume

The airflow volume is measured for each version of the BREX® module. The resulting curve chart exactly shows the air or gas volume that passes through the module per unit time at a certain pressure. This is the basis for determining the number of BREX® modules required for any given application.

Flow Simulation: we don't guess but calculate

We use state-of-the-art flow simulation software already in the development phase of our products. It offers the possibility to calculate and visualize e.g. the rate and direction of propagation of a pressure wave as well as the resulting pressure or temperature at any point of the device. The findings obtained with this method help us to both optimize our products and find appropriate protective solutions for our clients' plants.

The picture clearly shows that most of the pressure wave released after the opening of the venting covers spreads out along the outer surface of the protected vessel, almost nothing is released into the surrounding area. The risk of damage to property or injury is significantly reduced.

Technical information

 • Fire resistance class F90 acc. to DIN 4102-2

   corresponding to EI90 acc. to EN 13501-2

 • completely dust-proof

 • highly gas-tight (leakage < 0.2 m³/h)

 • smoke-tight acc. to DIN EN 1634-3

 • Operating temperature: -40°C to 600°C

 • Vacuum stability: up to 200 mbar / 20,000 Pa

 • Opening pressure: default setting by manufacturer

   from 10 to 100 mbar (g)

 • Opening path of the venting covers: ≤ 120 mm

 • Dimensions: according to drawing

 

 

 

 

Flexible facility design thanks to integrated fire and explosion protection

 

The BREX® module is simply inserted into a wall opening of 550mm x 550mm and bolted directly to the wall. Several modules can be combined to form a larger element: an extremely space-saving solution, which almost disappears inside the wall.

 

The number of BREX® modules required depends, among other things, on the strength of the wall, the volume of the compartment and of course the items that are likely to cause fire or a pressure increase. Computer simulation, which delivers sufficiently accurate results, is used to help design the appropriate protection for each plant.

 

A side effect of the BREX® module is an improved noise insulation.

 

Of course the BREX® module can also be used to upgrade existing facilities.

 

 

 

 

 

We will be glad to help you plan and design the appropriate explosion protection solution for your plant and determine the devices that best suit your specific needs. Contact us to discuss your options and receive a non-binding offer—our competence and cost-efficiency will convince you.