The Comparison Test Between The Two NDT Methods Of Magnetic Couple And Touch Head On The Branch Pipe Angle Weld

摘要

The joint of main pipe and its branch pipe is often welded while the pipe is used to transport higher pressure medium , and do not use the tee joint . The nondestructive test methods for the welded joint we can use according to the field are magnetic couple and touch head . But which one is better to find out defects of the welded joint ? So , we designed a comparison test to compare the results of finding out defects of the welded joint. The comparison test was made between the two NDT methods of magnetic couple and touch head on the angle weld composed by main pipe (Ф219?á6)and its branch pipe(Ф159?á6),the meterials of the two pipes are L360 .And from the test,we get the conclusion that the length destingusied by C-15/50 test spiece along the weld length is equal or near the same,but the magnetic couple method is easier to practice.