1 Jul ISO (E). PDF disclaimer. This PDF file may contain embedded typefaces. In accordance with Adobe’s licensing policy, this file may. 21 Jun Purchase your copy of ISO as a PDF download or hard copy directly from the official BSI Shop. All BSI British Standards available. In ISO and ISO more sophisticated hazard criteria were adopted. Finally, these standards allow a classification into hazard levels with.
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Also, there are no more than three rateable perforations or indents anywhere in the witness panel, and any fragments on the floor between 1 m and 3 m from the interior face of the specimen have a sum total united dimension of mm or less.
P-t io at locations subject to blast clearing, on small targets or near the edges of targets, have a reduced impulse and do not follow the shape of an idealized Friedlander curve. Check out our FAQs. 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 that successfully resist that air blast at that level. As such non-standard glazing assemblies may only be tested but not classified in accordance with this standard, the number of test specimens will be as agreed prior to test.
The high explosive shall then be armed in a manner to maximize safety of personnel in the event of accidental discharge of the explosive during the arming procedure. Take the smart route to manage medical device compliance. Worldwide Standards We can source io standard from anywhere in the world. Where a transducer panel is 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.
Learn more about the cookies we use and how to change your settings. D Very low hazard The glazing is observed to fracture and significant parts are located no further than 1 m behind the original location of the rear face.
Ethiopian Standards are approved by the National Standardization Council and are kept under continuous review after publication and updated regularly to take account of latest scientific and technological changes. This information is given for the convenience of users of ISO and does not constitute an endorsement by ISO of this product. Outer leaves from the attack face may be sacrificed and may fall or be projected out.
The test facility shall be situated, and of sufficient size, to safely accommodate detonation of the amount of explosive required to provide the desired peak positive air-blast pressure and positive phase impulse. Seven standard blasts simulating vehicle bombs and seven standard blasts simulating smaller satchel bombs that can be used to classify glazing performance are incorporated in this International Standard and cover a broad range of blast parameters.
Monday to Friday – For rating purposes only, the minimum area of the witness panel defined in 6. Search all products by. The resulting mean values from several tests were then averaged and rounded down to provide a realistic, achievable set of mean values to be applied as classification values to the centre of a test specimen.
After the high explosive is armed and all personnel are at a safe distance from the explosive, the explosion shall be triggered. This is in order to avoid excessive reductions in reflected impulse that arise owing to the effects of blast clearing from the edges of small targets.
For further information, see Annexes A and B. The united dimension of a glass particle is determined by adding its width and length and thickness. If they are different, the calculation should weight the number of readings for each. Different subscripts may be used for the blast parameters. Bullet resistant security glazing. The testing agency selects the explosive and test dimensions to yield a high-explosive blast having the required classification criteria for the site conditions.
Test and classification for arena air-blast loading Status: At least one free-field pressure transducer shall be used in each test. B No ieo The glazing is observed to fracture but the inner, rear face leaf is fully retained in the facility test frame or glazing iao frame with no breach and no material is lost from the interior surface. The 116933 kg charges were placed at a height of 0,5 m to centre above a hard surface.
Glazing dust, slivers and all other smaller particles are not accounted as fragments. Establish the value of the resulting measured peak pressure, P maxby recording the pressure value from the point at which the mean pressure-time trace iwo the time-of-arrival axis.
For such close standoffs, the distance-to-blast measurement points becomes critical. Final text received or FDIS registered for formal approval. Each specimen shall be labelled in the post-test photographs to allow for their clear identification.
The 12 kg and 20 kg charges were placed at a height of 0,8 m to centre above a hard surface. Fragments that shall be considered in rating the glazing or glazing system include those generated by the glazing and any other parts of the is system not considered to be part of the test facility.
Test and classification for arena air-blast loading. Mean peak air-blast pressure and mean positive-phase impulse values, computed from recordings by the air-blast transducers mounted as defined in 6. An illustration of the calculation of tolerance from actual blasts is given in Isl B. For further information on assessing the blast relative to the size of the reaction structure, tests, criteria and effects on glazing, see Reference .
The blast wave is characterized at any given point by an instantaneous rise in pressure followed by a decay over a time period called the positive phase duration. Therefore this version remains current.