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J-Integral test

HI All,

i am doing my masters and my thesis is about pipeline integrity.In my thesis, we did J-Integral test for our pipes(20'diameter and 5.7 mm thicjness) after getting results ,according to ASTM we should draw 0.2 line to find J0.2 and the value which i got is around 200 kj/m2 but as you know for pipeline materilas the J should be around 120 kj/m2 ,now i wonder to know if there is any other way for calculating j-integral for pipelines? we also run charpy test and again i am wondering to know if there is any way for corrolating chary to JIC ?

thanks,

ali

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