Method and template for producing a tensile test coupon
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United States of America Patent
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Feb 12, 2013
Grant Date -
Mar 24, 2011
app pub date -
Apr 23, 2010
filing date -
Sep 22, 2009
priority date (Note) -
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Abstract
A method and template enable the testing of fusion joints of plastic pipes to be conducted by a single operator in the field at the welding site by the efficient and precise extraction from the joints to be tested of a number of high quality tensile coupons. The coupons are tested to failure in a field-suitable, well controlled, self contained, tensile testing apparatus. A narrowing bow-tie-like pattern of the coupon ensures that the failure of the coupon in the tensile test will occur at the narrowest section of the coupon. The template can be visually aligned with the joint to ensure that it is the joint that will be tested.
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