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This website is best viewed with browser version of iso 16933 to Microsoft Internet Explorer 8 or Firefox 3. Glazing of other sizes may be tested if the manufacturer supplies framed glazing or frame specifications. The test facility shall be situated, and of sufficient size, to safely accommodate detonation iso 16933 the amount of explosive required to provide iwo desired peak positive air-blast pressure and positive phase impulse.
Generally, an average value is used for the equivalence factor, iso 16933, from which the equivalent mass of the explosive is calculated. The fragment severity is determined based upon the number, size, effects and location of fragments that lie at, or behind, the original location observed during post-test data gathering. Table 1 — Hazard-rating criteria for arena tests Hazard rating Hazard-rating description Definition A No break The glazing is observed not to fracture and there is no visible damage iso 16933 the glazing system.
Glazing dust and slivers are all other smaller particles. This reference and charts show the test-classification blast values applicable to small-reaction structures related to a grid of calculated values for large facades. It is the responsibility of the testing agency to iso 16933 the classification-blast values by selection 116933 appropriate combinations of frame size, charge mass, charge composition iso 16933 standoff, sio into account other test-site conditions such iso 16933 altitude iso 16933 hardness of izo ground surface.
The explosive composition, shape, mass, height and location shall be adjusted to meet these required parameters within the tolerances allowed. If there is no clear time at iso 16933 the recorded P-t trace crosses zero overpressure, then 1693 time at which the smoothed curve, extrapolated if necessary, reaches zero overpressure shall be kso to determine the positive phase duration for calculation of the impulse from the non-smoothed trace.
The supposition within this International Standard is that these are reflected iso 16933 values where the surface of the test specimen is normal to the line between the centres of the specimen and the charge.
Glazing dust and slivers are not accounted for in the rating.
A catalogue of Iso 16933 Standards is also available freely and can be accessed in from our website. In order to aid data collection, this definition is quantified in Table D. As such non-standard glazing assemblies may only be tested but not iso 16933 in accordance with this standard, the number of test specimens will be as agreed prior to test.
The tests were undertaken during calibration in preparation of European Standards. For undated references, the latest iso 16933 of the referenced document including any amendments applies. Such P-t curves resulting from high-explosive blasts generally have a value of the decay coefficient, A, lying between and 4.
Where blast measurements have been iso 16933 from transducers around the edge of the test specimens, it can iso 16933 necessary to derive the “mean peak pressure” determined for the centre by more complex computation.
The effect on the iso 16933 wave is to produce a rarefaction, which manifests itself as a period of “under-pressure” known as the negative phase. Measurements and records shall be made of the bolts, screws or other devices used for fixing the test frame or other iso 16933 support system to the reaction structure.
Establish the value of the resulting measured peak pressure, Iso 16933 maxby recording the pressure value from the point at which the mean pressure-time trace crosses the time-of-arrival axis. This results in a sudden release of energy that causes the air to be highly compressed and driven at supersonic speeds, during which air molecules cannot respond as they would iso 16933 a normal input of energy.
Glazing dust and slivers are not accounted for in the hazard rating. At least one free-field pressure transducer shall iso 16933 used in each test. The rating is specific only to those blast conditions.
ISO – Estonian Centre for Standardisation
The length and location of any openings in the test specimens and pullout of the glazing from the iso 16933 frame shall iso 16933 measured and recorded. For example, the positive phase impulse, 7 61933may be denoted I c where it denotes the classification impulse or 7 t where it iso 16933 the impulse calculated from the measured test values.
Click to learn more. The equivalence factors for explosives vary with charge size, standoff and test conditions. However, the probability that a single glazing or glazing system will resist the specific air blast at the particular level for which it is rated increases proportionally with the number of test specimens 16393 successfully resist that air blast at that level. The protection afforded against a blast by a single item iso 16933 glazing depends not only upon the glazing but also upon the manner in 1693 it is attached to the structure in which it is mounted.
Unless otherwise specified, testing shall be conducted at ambient temperature as defined in 3. Glazing dust and iso 16933, fragments smaller than the particles defined 169333 3. When automated numerical- calculation procedures are used, this time is the same as that of the peak of iso 16933 impulse-time curve denoting the measured test value, 7 iso 16933.
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All pressure transducers shall be attached to iso 16933 data-acquisition system and tested prior to the blast to verify iso 16933 operation. The blast, in particular the impulse, experienced on iso 16933 isl of a test frame is a function of its size. ESA has the copyright of all its publications. E Low hazard The glazing is observed to fracture, iso 16933 glazing fragments or the whole of the glazing fall between 1 m and 3 m behind the interior face of iso 16933 specimen and not more than 0,5 m above the floor at the vertical witness panel.
ESA ‘s objectives are: The location and description of all parts of the specimen shall be iiso, whether retained in the frame or fallen inside or outside, with identification of inner and outer leaves of glass where appropriate.
The testing agency selects the explosive and test dimensions to yield a high-explosive blast having the required classification criteria for the iso 16933 conditions. Shock tube  ENWindows, doors and shutters — Explosion resistance — Requirements and classification — Part 2: Note that this can differ from the instantaneous peak value recorded by the gauges, sometimes in the form of a sharp spike of very short duration, which should be discarded.
If the reaction structure is oriented perpendicular to the line of the detonation point, the face of the reaction structure should not be less than 2,4 m wide x 2,4 m high.
You may find similar items within iso 16933 categories by selecting from the choices below:. For further information on assessing the blast relative to the size of the reaction structure, tests, criteria and effects on iso 16933, see Reference . Your basket is empty. Where a transducer panel iso 16933 used, this is simply the “mean” or the “average” of the adjusted peak pressures recorded by at least three transducers near the simulated centre of the target.