STANDARD TEST PIECE FOR NON-DESTRUCTIVE TEST AND MANUFACTURING METHOD THEREFOR

摘要

PROBLEM TO BE SOLVED: To provide a standard test piece for non-destructive test that is used to detect a crack-like defect in a pipe-end weld part through the non-destructive test.

SOLUTION: A standard test piece 10 for non-destructive test that is used to detect a crack-like defect in a pipe-end weld part through the non-destructive test comprises: a test piece body 12 that is formed of carbon steel and includes a through-hole 15; a pipe body 14 that is inserted into the through-hole 15 and is formed of Cr-Mo steel; a space 17 that is provided between an outer periphery of the pipe body 14 and an inner periphery of the through-hole 15 in the test piece body 12; and a weld part 18 that welds all over the place between an outer periphery on one longitudinal end side of the pipe body 14 and an inner periphery on one longitudinal end side of the through-hole of the test piece body 12. The weld part 18 is injected with a corrosive liquid of the mixture of NaNO3and KNO3at a weight ratio of 50% to 50% into the space 17, and includes the crack-like defect induced by stress corrosion cracking.

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