IN-LINE MONITORING METHOD OF CARBON FIBER COMPOSITES PIPELINE REPAIR EFFECTS

Carbon fiber composite system repair technique is an advanced pipeline repair technique.It has many advantages such as the in-line repairing,simple construction and good repair effects.In recent years,it has been widely used.However,the evaluation of repair effect relies mainly on the finite element analysis and the burst test.There is the lack of the means of in-line monitoring repair effects in practical application now.For the above reasons,the stress and strain monitoring method is proposed for the first in home,which is used to evaluate the repairing effect.The results showed that the method has the advantages of simple operation and reliable data.The method may monitor quantitatively the capacity of bearing pipeline pressure before and after repair in defect points and reduce pipeline running risk.The results of field tests also show that the stress and strain monitoring method to evaluate the pipeline repair effects is feasible.