ASME 2 pdf download Methods of test for textiles
2 Normative references
The following standards contain provisions which, through reference in this text, constitute provisions of this International Standard. At the time of publication, the editions indicated were valid. All standards are subject to revision, and parties to agreements based on this International Standard are encouraged to investigate the possibility of applying the most recent editions of the standards indicated below. Members of IEC and ISO maintain registers of currently valid International Standards.
For the purposes of this part of EN ISO 13934 the following definitions apply:
3.1 Constant-rate-of-extension (CRE) testing machine
Tensile-testing machine provided with one clamp which is stationary and another clamp which moves with a constant speed throughout the test, the entire testing system being virtually free from deflection (EN ISO 13934-1).
3.2 Grab test
Tensile test in which only the centre part of the test specimen is gripped in the jaws of the testing machine.
3.3 Maximum force
The maximum force recorded when a test specimen is taken to rupture during a test under the specified conditions
(EN ISO 13934-1).
3.4 Gauge length
Distance between the two effective clamping points of a testing device.
Note : The effective clamping points (or lines) of jaws can be checked by clamping a test specimen under specified pretension with carbon copy paper to produce a gripping pattern on the test specimen and/or the jaw faces (EN ISO 13934-1).
A fabric test specimen is gripped in its centre part by jaws of specified dimensions is extended at constant rate until it ruptures. The maximum force is recorded.
Select samples either in accordance with the procedure laid down in the material specification for the fabric, or as agreed between the interested parties.
In the absence of an appropriate material specification the example of a suitable sampling procedure given in annex A may be used.
An example of a suitable pattern for cutting test specimens from the laboratory sample is given in annex B. Avoid test specimens with folded or creased areas, selvedges and areas not representative of the fabric.
6.1 CRE machine.
Metrological confirmation system of the tensile-testing machine shall be in accordance with EN 30012-1.
The constant-rate-of-extension (CRE) machine shall have the general characteristics given in 6.1.1 to 6.1.6.
6.1.1 The tensile-testing machine shall be provided with means for indicating or recording the force applied to the test specimen in stretching it to rupture. Under conditions of use, the accuracy of the apparatus shall be class 1 of EN 10002-2. The error of the indicated or recorded maximum force at any point in the range in which the machine is used shall not exceed ± 1 %.