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Submerged arc welded steel pipes for pressure applications according to ISO 9765 standard
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Submerged arc welded steel pipes for pressure applications according to ISO 9765 standard
ISO 9765: The 1990 standard is an international standard for submerged arc welded steel pipes used for pressure applications, officially known as "Ultrasonic Testing of Weld Seam for Longitudinal and/or Transverse Defects in Submerged Arc Welded Steel Pipes Used for Pressure Applications". This standard has broad applicability and authority, but the specific implementation may vary in different countries and regions, and should be interpreted and applied according to actual situations.
standard content
definition
Defined and explained terms such as submerged arc welded steel pipes, pressure purposes, welds, ultrasonic testing, and defects.
Application scope
Mainly applicable to submerged arc welded steel pipes that meet specific requirements, such as pipe diameter, wall thickness, material, etc. At the same time, it is clarified that this standard does not apply to steel pipes welded on site.
test method
It mainly provides methods and steps for ultrasonic testing of welds, including equipment selection, probe selection, testing frequency selection, testing procedures, etc. At the same time, it also stipulates the recording and reporting of test results.
require
The quality requirements for welds have been established, including requirements for longitudinal and transverse defects. At the same time, it also stipulates the qualified standards for testing and the measures to deal with unqualified ones.
Implementation and certification
The implementation and certification process must comply with relevant regulations and requirements, including the qualifications of the certification body, the certification process, and the issuance of certification certificates.
Similar standards
In the international steel pipe standard system, there are many standards related or similar to ISO 9765, such as ISO 9303-1989 (excluding submerged arc welding) for detecting longitudinal defects in steel pipes using full peripheral ultrasonic testing, ISO 9402-1989 (excluding submerged arc welding) for detecting longitudinal defects in steel pipes using ferromagnetic steel pipe full peripheral magnetic conversion/flux testing, etc. These standards provide quality inspection regulations for steel pipes from different perspectives and methods.
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