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  • BSI
    BS EN ISO 20601:2018 Non-destructive testing of welds. Ultrasonic testing. Use of automated phased array technology for thin-walled steel components
    Edition: 2019
    $423.36
    / user per year

Description of BS EN ISO 20601:2018 2019

This document specifies the application of phased array technology for the semi- or fully automated ultrasonic testing of fusion-welded joints in steel parts with thickness values between 3,2 mm and 8,0 mm. This meets the typical range of tube wall thickness values in boilers, which is an important application of this testing technology. The minimum and maximum value of the wall thickness range can be exceeded, when testing level “D” of this document is applied. This document applies to full penetration welded joints of simple geometry in plates, tubes, pipes, and vessels, where both the weld and parent material are low-alloy and/or fine grained steel.

NOTE “Semi-automated testing” encompasses a controlled movement of one or more probes on the surface of a component along a fixture (guidance strip, ruler, etc.), whereby the probe position is unambiguously measured with a position sensor. The probe is moved manually. “Fully automated testing” includes mechanized propulsion in addition.

Where material-dependent ultrasonic parameters are specified in this document, they are based on steels having a sound velocity of (5 920 ± 50) m/s for longitudinal waves, and (3 255 ± 30) m/s for transverse waves. It is necessary to take this fact into account when testing materials with a different velocity.

This document provides guidance on the specific capabilities and limitations of phased array technology for the detection, location, sizing and characterization of discontinuities in fusion-welded joints. Ultrasonic phased array technology can be used as a stand-alone technique or in combination with other non-destructive testing (NDT) methods or techniques, during manufacturing and testing of new welds/repair welds (pre-service testing).

This document specifies two testing levels:

  • level “C” for standard situations;

  • level “D” for different situations/special applications.

This document describes assessment of discontinuities for acceptance purposes based on:

  • height and length;

  • amplitude (equivalent reflector size) and length;

  • go/no-go decision.

This document does not include acceptance levels for discontinuities.



Standard NumberBS EN ISO 20601:2018
TitleNon-destructive testing of welds. Ultrasonic testing. Use of automated phased array technology for thin-walled steel components
StatusDefinitive
Publication Date2019-01-04
Identical National Standard OfEN ISO 20601:2018, ISO 20601:2018
DescriptorsComponents, Steels, Ultrasonic testing, Welds, Non-destructive testing
ICS25.160.40 Welded joints and welds
CommitteeWEE/46
ISBN978 0 580 98781 6
PublisherBSI
Pages28



About BSI

BSI Group, also known as the British Standards Institution is the national standards body of the United Kingdom. BSI produces technical standards on a wide range of products and services and also supplies certification and standards-related services to businesses.
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