BS EN ISO 3303-1:2020 pdf free.Rubber- or plastics-coated fabrics Determination of bursting strength.Steel-ball method.
BS EN ISO 3303-1 Take five test pieces across the usable width of the sample (see NOTE), at least 1 mm from the extremity of the sample, and of sufficient size so that each test piece can be clamped firmly in the clamping system of the test machine. The smaller dimension of each test piece shall be at least 12 mm greater than the outside diameter of the clamping surfaces. Alternatively, the sample may be tested at the requisite location across its width, avoiding areas that have already been used for a test by at least 20 mm. NOTE The usable width is defined in ISO 2286-1 as that width, excluding the selvedge, which is consistent in its properties, uniformly finished, and free of unacceptable flaws. The face of the coated fabric to be tested shall be defined and agreed between the interested parties. The results might not be the same if the opposite face is tested.When it is required to determine the properties of wet material, immerse the test pieces for 24 h in water (5.4), or water containing no more than 0,1 % wetting agent or surfactant (5.5), of about 20 times the total volume of the test pieces at the room temperature. Immediately after removal from the water, rinse the test pieces thoroughly in water and proceed to test within 1 min. Move the test piece and steel ball towards each other at a rate of 300 mm/min土30 mm/min until the test piece ruptures under the pressure being applied by the steel ball.  For each test, read from the scale of the test machine the force, in newtons, and the displacement in millimetres to the nearest 0,1 mm of the steel ball required to cause the rupture of the test piece.  Ignore any test results from test pieces which rupture at the edge of the clamp or slip in the clamp, and repeat the test on another test piece. Record the mean of the five results obtained. When testing on wet test pieces is required, remove the test piece from the water (in accordance with 7.3), press it tightly between two sheets of blotting paper (5.6) and immediately carry out the test as described in the procedure from 10.1 through 10.5.BS EN ISO 3303-1 pdf download.