National foreword

This British Standard is the UK implementation of EN 17391:2022.

The UK participation in its preparation was entrusted to Technical Committee WEE/46/9, Acoustic Emission Testing.

A list of organizations represented on this committee can be obtained on request to its committee manager.

Contractual and legal considerations

This publication has been prepared in good faith, however no representation, warranty, assurance or undertaking (express or implied) is or will be made, and no responsibility or liability is or will be accepted by BSI in relation to the adequacy, accuracy, completeness or reasonableness of this publication. All and any such responsibility and liability is expressly disclaimed to the full extent permitted by the law.

This publication is provided as is, and is to be used at the recipient’s own risk.

The recipient is advised to consider seeking professional guidance with respect to its use of this publication.

This publication is not intended to constitute a contract. Users are responsible for its correct application.

Compliance with a British Standard cannot confer immunity from legal obligations.

This British Standard was published under the authority of the Standards Policy and Strategy Committee on 31 August 2022.

This European Standard was approved by CEN on 5 March 2021.

CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the CEN-CENELEC Management Centre or to any CEN member.

This European Standard exists in three official versions (English, French, German). A version in any other language made by translation under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC Management Centre has the same status as the official versions.

CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United Kingdom.

European foreword

This document ( EN 17391:2022) has been prepared by Technical Committee CEN/TC 138 “Non-destructive testing”, the secretariat of which is held by AFNOR.

This European Standard shall be given the status of a national standard, either by publication of an identical text or by endorsement, at the latest by December 2022, and conflicting national standards shall be withdrawn at the latest by December 2022.

Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. CEN shall not be held responsible for identifying any or all such patent rights.

Any feedback and questions on this document should be directed to the users’ national standards body. A complete listing of these bodies can be found on the CEN website.

According to the CEN-CENELEC Internal Regulations, the national standards organisations of the following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom.

Introduction

Acoustic emission testing (AT) is well established for the detection of discontinuities in metallic structures. Furthermore, AT is widely accepted and applied during hydraulic or pneumatic test. In-service acoustic emission (AE) monitoring can provide global surveillance of structural details for early detection of active cracks and damage evolution. It allows through life damage assessment guiding subsequent non-destructive testing (NDT) for damage verification and damage sizing purposes.

1 Scope

This document specifies general requirements for in-service acoustic emission (AE) monitoring. It relates to detection, location and grading of AE sources with application to metallic pressure equipment and other structures such as bridges, bridge ropes, cranes, storage tanks, pipelines, wind turbine towers, marine applications, offshore structures. The monitoring can be periodic, temporary or continuous, on site or remote-controlled, supervised or automated. The objectives of AE monitoring are to define regions which are acoustically active as a result of damage or defect evolution.

2 Normative references

3 Terms and definitions

4 Personnel qualification

5 Information prior to testing

5.1 Structural information

5.2 Operating conditions

5.3 AE event mechanisms

6 Monitoring methodology

6.1 Periodic, temporary or continuous monitoring

6.2 On-site or remote-controlled monitoring

6.3 Supervised or automated monitoring

7 Monitoring instrumentation

7.1 System requirements

7.2 Sensors and preamplifiers

7.3 Portable AE equipment

7.4 Single channel and multi-channel AE equipment

7.5 Measured parameters

7.6 Verification of sensor sensitivity and coupling quality

7.7 External parameters

7.8 AE system

7.9 Monitoring in hazardous areas

8 Pre-monitoring measurements

8.1 Wave propagation behaviour

8.2 Background noise measurement

8.3 Sensitivity of AE monitoring using linear or planar location

9 Monitoring procedure

9.1 Sensor positioning

9.2 External parameters

9.3 Instrumentation verification

9.4 Data acquisition and online filtering

10 Data analysis

10.1 General

10.2 Online analysis

10.3 Data processing

11 AE source interpretation and evaluation

11.1 Interpretation of AE results

11.2 Source evaluation criteria

11.3 Grading of AE sources

11.4 Verification of AE sources and follow-up NDT

12 Documentation and reporting

Bibliography

BS EN 17391:2022

Non-destructive testing. Acoustic emission testing. In-service acoustic emission monitoring of metallic pressure equipment and structures. General requirements

Current

Published:

31 Aug 2022