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BS EN 17391:2022

$167.15

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

Published By Publication Date Number of Pages
BSI 2022 42
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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.

PDF Catalog

PDF Pages PDF Title
2 undefined
8 1 Scope
2 Normative references
3 Terms and definitions
4 Personnel qualification
9 5 Information prior to testing
5.1 Structural information
5.2 Operating conditions
10 5.3 AE event mechanisms
5.3.1 General
5.3.2 Crack growth
11 5.3.3 Corrosion
5.3.4 Friction, fretting and cavitation erosion
6 Monitoring methodology
6.1 Periodic, temporary or continuous monitoring
12 6.2 On-site or remote-controlled monitoring
13 6.3 Supervised or automated monitoring
7 Monitoring instrumentation
7.1 System requirements
7.2 Sensors and preamplifiers
7.2.1 General requirements
14 7.2.2 Frequency range (band width)
15 7.2.3 Coupling agent
7.2.4 Mounting method
7.2.5 Temperature range, wave guide usage
7.2.6 Use in explosive atmosphere
7.2.7 Immersed sensors
7.2.8 Integral electronics (amplifier, band-pass filter, RMS converter, ASL converter)
16 7.2.9 Grounding
7.2.10 External preamplifiers
7.2.11 Sensor and preamplifier cables
7.3 Portable AE equipment
7.4 Single channel and multi-channel AE equipment
7.5 Measured parameters
7.5.1 Burst signal parameters
17 7.5.2 Continuous signal parameters
7.6 Verification of sensor sensitivity and coupling quality
7.7 External parameters
7.8 AE system
18 7.9 Monitoring in hazardous areas
8 Pre-monitoring measurements
8.1 Wave propagation behaviour
8.1.1 General
19 8.1.2 Liquid or gas containment
8.1.3 Wall thickness
8.1.4 Geometry of the structure
8.1.5 Insulation
8.1.6 Surface preparation
8.2 Background noise measurement
8.2.1 Representative location
20 8.2.2 Process noise
8.2.3 Other disturbance noise
8.2.4 Noise sampling period
8.3 Sensitivity of AE monitoring using linear or planar location
21 9 Monitoring procedure
9.1 Sensor positioning
9.2 External parameters
9.3 Instrumentation verification
9.4 Data acquisition and online filtering
22 10 Data analysis
10.1 General
10.2 Online analysis
10.3 Data processing
10.3.1 General
10.3.2 Background noise analysis
23 10.3.3 Pre-location data analysis
10.3.4 AE event location
24 10.3.5 Cluster analysis
10.3.6 Pattern recognition
11 AE source interpretation and evaluation
11.1 Interpretation of AE results
25 11.2 Source evaluation criteria
27 11.3 Grading of AE sources
28 11.4 Verification of AE sources and follow-up NDT
12 Documentation and reporting
29 Annex A (informative)Fatigue crack growth and associated acoustic emission applied to monitoring of marine structures
A.1 Acoustic emission power, energy and intensity
A.1.1 General
A.1.2 Acoustic emission power
A.1.3 Acoustic emission energy
30 A.1.4 Acoustic emission intensity
A.2 AE power and resulting waves from a micro-fracture event (AE source)
31 A.3 AE detectability
32 A.4 Fatigue crack growth
34 A.5 Critical crack depth
35 A.6 Crack growth rate and required duration of monitoring
38 A.7 AE fatigue monitoring of ship hull structure
BS EN 17391:2022
$167.15