目录简介 | 1 Scope
This standard specifies four non-destructive testing (NDT) methods (including radiographic testing, ultrasonic testing, magnetic particle testing and penetration testing) and their quality grading.
Radiographic (X or γ) testing is applicable to the testing and mass grading of the circumferential butt joints of pipelines (made from low carbon steel, low alloy steel and other metal materials with 2mm~50mm wall thickness) for long-distance and collective transport of oil and gas or at the oil and gas stations.
Ultrasonic testing is applicable to the testing and mass grading of the circumferential butt joints of pipelines (made from carbon steel, low alloy steel and other metal materials with 2mm~50mm wall thickness and 57mm ~1400mm pipe diameter) for long-distance and collective transport of oil and gas or at the oil and gas stations; it is not applicable to the testing of the butt joints between elbow and straight pipe, hubbed flange and straight pipe as well as return elbow and straight pipe.
The magnetic particle testing is applicable to the testing and acceptance of the welding joint surface and near surface imperfection of ferro magnetic pipelines for long-distance and collective transport of oil and gas or at the oil and gas stations as well as of steel storage tanks under normal pressure.
The penetration testing is applicable to the testing and acceptance of the welding joint surface opening imperfection of pipelines for long-distance and collective transport of oil and gas or at the oil and gas stations as well as of steel storage tanks under normal pressure.
This standard is not applicable to either the NDT of industrial and public pipelines, or the NDT of the fabricating weld joints of oil and gas pipelines.
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