BS EN 12814-2:2021 pdf free

05-06-2021 comment

BS EN 12814-2:2021 pdf free.Testing of welded joints of thermoplasticssemi-finished products Tensile test.
BS EN 12814-2 The tensile test specimens shall be cut with parallel sides as shown in Figures 1 and 2. During cutting.heating of the test specimen shall be minimized.
Cutting of the test specimen shall not produce notches.
After cutting, a visual examination of the weld according to EN 13100-1 shall be carried out and recorded.8Mechanical testing
Test specimen shall be conditioned to a temperature of (23± 2)°C and unless otherwise specified,the testshall be carried out at a room temperature of (233)c.The test speeds and tolerances shall be in accordance with EN ISO 527-1.
For all materials the test speed shall be chosen to ensure that the test is terminated in about one minute.Examples of test speeds for some relevant thermoplastics materials are listed in Annex B.At least five test specimens shall be tested for each welded and unwelded test piece.Welded and unwelded test specimens shall be of the same geometry and shall be tested at the same speedwith the same distance between the clamps.
lf all welded test specimens fracture or yield within the calibrated length, but outside of the weld (L.), theunwelded test specimen do not need to be tested, and the short-term tensile welding factor shall be takenas 1.
In order to achieve a failure in the weld, the test specimens shall be as described in IS0 13953 (Type Aonly,for thickness less than 25 mm) or in Annex C.The test equipment shall conform to the requirements given in lSO 5893.
The crosshead displacement shall be continuous, uniform and in accordance with Clause 8.10 Determination of the short-term tensile welding factor.In order to determine the short-term tensile welding factor, welded and unwelded test specimens shall betested.At least ten test specimens (five welded and five unwelded) shall be used in the evaluation of the short.term tensile welding factor. No test specimen shall be disregarded unless failure occurs in the clamps.ln the case of the type 1 test specimens, failure within a distance of 1 times specimen width b, from theclamps shall be regarded as failure in the clamp.
lf type 1 test specimens consistently fail in the clamps then type 2 test specimens shall be used.
ln the case of type 2 test specimens, failure outside of the calibrated length (Lo) shall be regarded as failurein the clamp.
In the case of the whole tube tensile test,failure within a distance of 1,5 D from the clamps shall be regardedas failure in the clamp.BS EN 12814-2 pdf download.

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