Blast-proof
EN 13123-2 & EN 13124-2

Heinen Doors designs blast-resistant doors on its Métal+ platform, capable of withstanding blast loads of up to 8 T/m², rebound included. Built on the EI2 120 fire-rated substrate, they combine blast resistance and fire resistance in a single unit, and adapt to the constraints of industrial, energy, and sensitive sites.

Heinen Doors meets a blast-resistance requirement in two ways. When the configuration matches our real-world tests, conducted in accordance with EN 13123-2 and EN 13124-2 on single and double leaves, we present directly the solution resulting from these tests, which reach class EXR3 on the hinge side and EXR1 on the opposite side. When it departs from this, due to the targeted threat or the dimensions, our design office establishes a configuration based on a static calculation.

Two series of standards coexist depending on the explosion scenario considered.

EPR

EPR corresponds to larger, more distant charges. The peak pressure is relatively low, but the impulse, that is, the energy transmitted over time, is high. This is the typical scenario of an accidental industrial explosion or a long-range attack.
EN 13123-1 / EN 13124-1 — Shock tube test. This method simulates distant explosions with large charges: from 100 to 2,500 kg of TNT at distances of 35 to 50 m. It results in a classification of EPR1 to EPR4.

EXR

EXR corresponds to smaller, closer charges. The peak pressure is high, but the impulse is short. This is the scenario of a charge placed in the immediate vicinity of the leaf.
EN 13123-2 / EN 13124-2 — Free-field test (arena test). This is the reference method used by Heinen: the door is subjected to a real explosion under controlled conditions, with charges of 3 to 20 kg of TNT at 3 to 5 m. It results in a classification of EXR1 to EXR5.
In summary: EN 13124 defines the test methods; EN 13123 defines the requirements and assigns the resulting resistance class.

The revised version of the EN 13123-2 / EN 13124-2 standard

The revised version of the EN 13123-2 / EN 13124-2 standard expands the historical EXR1-5 classification by introducing additional resistance classes, divided into two charge families, both tested in the open field (arena test).

The PXR classes cover low charges placed at short range (3 to 20 kg of TNT at 3 to 9 m): high peak pressure and short impulse, in direct continuity with the former EXR classes.

The VXR classes cover large charges at greater distance (100 to 500 kg of TNT at 15 to 34 m): lower peak pressure, but a much higher impulse — the energy transmitted over time. This is the blast configuration of a large-scale attack at a distance.

The standard provides a correlation table between the new PXR classes and the former EXR classes. Heinen blast-resistant doors, tested at EXR3 on the hinge side and EXR1 on the opposite side, thus fall within classes PXR5 and PXR3 of the new nomenclature.

PXR classes — low charges, short range

Tolerances: maximum positive reflected pressure and impulse between 0% and +20%.

VXR classes — large charges, greater distance

Tolerances: maximum positive reflected pressure and impulse between 0% and +20%.

Correlation with the former EN 13123-2:2004 standard

Blast-proof is just one of the many features of Heinen doors. Discover all the other exceptional characteristics that ensure security, comfort, and reliability for your projects!