BLAST RESISTANT BARRIER
A blast wall is simply a barrier used to protect the facade of a vulnerable structure and its occupants from debris and fire during an explosion or attack. The danger might come from an industrial accident, military action, or terrorism. They can also be used for construction, military, mining, airports, and processing facilities.
A blast wall is typically erected to safeguard a building and its occupants when a temporary threat is identified, after construction of the building is complete. Blast walls are usually added to structures that didn't require and had no blast resistance before the threat was identified.
On the other hand, a blast-resistant building is specifically used for occupied buildings or buildings that contain high-cost or specialty equipment, in areas where hazards could reasonably (or even likely) be expected. The entire building is blast-resistant, rather than just protecting one side, or the facade, of the building.
To determine when a blast wall should be used, you must understand the type of hazards that could be present in the area it is placed. For example, in areas where the threat is seen as temporary, a blast wall might be enough to deflect shrapnel or simply protect the vulnerable structure of the building itself. In addition, blast walls can be combined to protect from multiple sides.
They are sometimes used in war or conflict zones, or as barriers during a planned explosion. In addition, military bases or airports might use them to protect aircraft or other expensive equipment. They can be used underground or underwater, and are used in multiple industries, many overlapping with industries that utilize blast-resistant buildings.
BLAST RESISTANT BARRIER FEATURES
- Blast resistant tested from 0.3 to 2.7 bar overpressure
- Resistant to hydrocarbon fires, tested to H120 post-2 bar blast
- Resistant to gas explosions
- Tested to CPNI C15 anti-terrorist TNT blast standard
- Impact resistant to 3000J after the 240-minute fire test
- Highly energy absorbent
Blast Doors are constructed using steel box section and steel sheet which is fully welded as per the design specification.
The frame is designed for casting into the door opening.
It is recommended that blast door frames are cast into the building fabric. This provides a stronger mounting and
means no drilling, or unnecessary penetrations through the host building wall around the opening.
ESEW Products offer a complete or supervised installation service for all of our doors.
Blast Resistant Doors are to be designed to resist the effects of a cased 500lb
charge, standard US MK117 Bomb at 100ft standoff. 25psi. In the absence of
further detailed information, this has been interpreted as a standard
general-purpose bomb. Class A fragment penetration.
Total charge weight (H-6/Tritonal) = 734lb (334kgs)
Equivalent TNT = 488lb (222kgs)
Peak Reflected Pressure, Pr = 99.1kPa
Reflected Impulse, Ir = 752.9kPa-ms
Idealised Triangular-decay duration, t = 15.2ms
LPG weapon direct hit
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