Patent ID: 6332361
Filing Date: 2001-12-25
Classification: G01N

Abstract:
A method for evaluating bonding properties of a metallic pipe comprising:a first measurement step of measuring an echo height of an ultrasonic wave reflected back from an edge of a bonding interface where two pipe members are bonded together by diffusion bonding upon letting in an ultrasonic wave toward a first side of the bonding interface;a second measurement step of measuring an echo height of an ultrasonic wave reflected back from said bonding interface upon letting in the ultrasonic wave toward a second side of said bonding interface;a step fault determination step of determining whether or not there is a step fault present at said bonding interface based on a difference between the echo height measured in the first measurement step and the echo height measured in the second measurement step; anda defect determination step of determining whether or not there is a defect present at said bonding interface based on minimum values of the echo height measured in the first measurement step and the echo height measured in the second measured step.