ISO was prepared by the European Committee for Standardization (CEN) Technical Committee TC , Welding, Subcommittee SC 5, Testing of welds. The procedures used to develop this document and those intended for its further maintenance are described in the ISO/IEC Directives, Part 1. In particular the. ISO specifies two ultrasonic acceptance levels known as acceptance level 2 (AL 2) and acceptance level 3 (AL 3) for full penetration welded joints.

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This website is best viewed with browser version of up to Microsoft Internet Explorer 8 or Firefox 3. The nominal frequency of probes used in this standard is between 2 MHz and 5 MHz unless attenuation or requirements for higher resolution call for other frequencies.

These acceptance levels apply to testing carried out in accordance with ISO Manufacturers of welded joints Suppliers of welded joints Professionals responsible for acceptance inspections Quality assessors Regulatory bodies The following industries are the most likely to use this standard: Testing conditions, Welded joints, Transverse joints, Welding, Ultrasonic testing, Acceptance approvalDimensions, Acceptance inspection, Sensitivity, Non-destructive testing, Thickness, Grades quality.


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ISO – Non-destructive testing of welds — Ultrasonic testing — Acceptance levels

Give careful consideration to using these acceptance levels in conjunction with frequencies outside this range. An acceptance level corresponding to ISO quality level D is not included because ultrasonic testing is generally not requested for this weld quality. This revision 111666 and corrects errors in the edition.

You may experience issues viewing this site in Internet Explorer 9, 10 or This international standard specifies acceptance levels for full penetration ultrasonic non-destructive testing of welded joints in ferritic steels.

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BS EN ISO 11666:2018

Learn more about the cookies we use and how to change your settings. It specifies ultrasonic acceptance levels 2 and 3 for full penetration welded joints in ferritic steels, which correspond to ISO quality levels B and C and applies to welds 8 mm to mm thick.


Your basket is empty. Worldwide Standards We can source any standard from anywhere in the world. Dn Product Details What is this standard about? The standard can also be used for other types of welds, materials and thicknesses, as long as examinations take the geometry and acoustic properties of the component into account, and an adequate sensitivity can be employed to enable the acceptance levels of this international is to be applied.

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BS EN ISO Non-destructive testing of welds. Ultrasonic testing. Acceptance levels

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