Blast-resistant Glass: Classes and Standards

Blast-resistant glass is designed to achieve an ideal combination of the stiffness and compressive strength of glass with the plasticity and energy-absorbing properties of polymer interlayers such as PVB. Often referred to as blast proof glass or explosion proof glass, these systems are developed as part of a comprehensive blast protection system to help safeguard people and property during explosive events.

The designation Class ER1, ER2, ER3, or ER4 depends on the corresponding amount of explosive pressure the glass is tested to withstand during simulations of an explosive detonation in a controlled shock-tube test mechanism. These blast proof glass specifications define the level of performance required for different threat scenarios and ensure that the high security glass glazing system can respond effectively to blast loads.

After testing, the blast proof glass should remain in the test frame to prevent fragments from harming people on the protected side, demonstrating how a properly engineered blast protection system with high-performance explosion proof glass can reduce the risks associated with explosive impacts.