GB/T 29461-2012Ultrasonic testing for electrofusion joint of polyethylene pipe (English PDF)

4.1 ultrasonic testing personnel

Ultrasonic testing personnel engaged fused polyethylene pressure pipe joints should be GB/T 9445 and the relevant provisions of the requirements of the industrial sector

Qualification and certification and obtain appropriate certificate. Each level of qualification achieved ultrasonic testing personnel, only in the level of qualification phase

Non-destructive testing should work, and take corresponding technical responsibility. Inspectors should understand the characteristics of polyethylene pipes, welding technology and manufacturing processes,

Polyethylene pipe joints fused by ultrasonic testing professional and technical training, and independent ultrasonic testing fused polyethylene pipe joints.

4.2 Testing Equipment

4.2.1

system performance testing equipment shall meet the following requirements.

a) horizontal linearity error is less than 1%;

b) Vertical linearity error of less than 5%;

c) gain range of not less than 30dB;

d) when it reaches the maximum detection probe workpiece sound path, the effective sensitivity margin of not less than 10dB.

4.2.2

Test equipment should have real-time B-scan imaging, real-time display brightness of the two-dimensional ultrasound fused joint longitudinal section (or color

Color) image, and the image size with a measurement function.

4.3 Probe

4.3.1

fused polyethylene pipe joints should be focused ultrasound probe, the priority focus phased array probe.