GB/T 41114-2021 in English

GB/T41114-2021 is equivalent to the ISO19675:2017 international standard, which specifies the production, marking and acceptance requirements of steel standard test blocks used for performance verification of phased array ultrasonic testing equipment. As the reference carrier of the detection system, the accuracy of the standard test block directly affects the reliability of the test results.

Electric power equipment testing

When a testing agency used the PAUT standard test block to verify the performance of the probe array, it was found that:

1. When using the R100mm arc surface to calibrate the fan scanning angle gain (ACG), the system compensation deviation is reduced from ±3dB to ±0.5dB
2. Through the 1.6mm horizontal hole signal-to-noise ratio test, 2 failed array elements were effectively identified

Key points of quality control

• Material verification: Each batch of steel needs to undergo an ultrasonic attenuation test to ensure that the bottom echo is ≥4 times and the amplitude is >25%FSH
• Dimension control: Critical dimensions such as 25mm thickness need to be re-inspected using a three-coordinate measuring machine
• Marking management: The laser marking depth is recommended to be controlled at 0.05-0.08mm to avoid stress concentration

Troubleshooting

When the measured value of the shear wave velocity exceeds the range of 3240-3270m/s, you should check: ① Whether the viscosity of the coupling agent meets the standard; ② Whether the polarization direction of the probe is orthogonal; ③ Whether the ambient temperature is within the range of 17-23℃.