Determination of the sensitivity of transverse wave detection in high pressure seamless steel tube

1, can be directly in the reference block of artificial sharp angle groove reflected echo amplitude to the screen full scale of 50%, as a benchmark sensitivity.

2, for the internal and external surface processing groove comparison test block, the internal surface groove should be the echo amplitude of the full scale of 80%. Then the amplitude point of reflection echo of outer surface groove is marked on the phosphor screen to make a amplitude curve of distance. 3, detection sensitivity should be higher than the benchmark sensitivity of 6dB.