T/ZJASE 007-2021 Non-metallic pipe electric welding joint phased array ultrasonic testing and safety evaluation

Scope

Scope: This document specifies the phased array ultrasonic testing method and safety assessment terminology and definitions, general requirements, specific requirements, analysis of testing data, and testing reports for electric fusion joints of polyethylene pipes. This document applies to phased array ultrasonic testing methods and safety assessments for electric fusion joints of polyethylene pipes with a wall thickness of 4mm to 90mm; Main technical content: It specifies the general requirements for ultrasonic testing personnel, testing process documents, testing equipment, phased array probes, test pieces, scanning devices, and coupling agents. This clause is based on the provisions of conventional phased array ultrasonic standards and takes into account the special requirements for the detection of non-metallic pipe joints. In particular, detailed specifications are provided for phased array probes used for testing: The focal area of the probe should be able to meet the requirements for detecting the depth of defects in electric fusion joints of polyethylene pipes and have good compatibility with the surface being tested. Considering the serious attenuation effect of ultrasound on non-metallic pipes, phased array probes should be composed of multiple chips (elements) (not less than 32), to ensure that the probe has sufficient energy to penetrate the pipe being tested. The requirements also specify specific requirements for the sensitivity differences between probe chips.

Development Information

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