BSI 13/30291465 DC:2013 Edition
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BS EN 16696. Non-destructive testing. Acoustic emission. Leak detection by means of acoustic emission
| Published By | Publication Date | Number of Pages |
| BSI | 2013 | 35 |
PDF Catalog
| PDF Pages | PDF Title |
|---|---|
| 4 | Contents Page |
| 6 | Foreword |
| 7 | 1 Scope 2 Normative references 3 Terms and definitions |
| 8 | 4 Personnel qualification 5 Principle of acoustic emission method 5.1 The AE phenomenon |
| 9 | 5.2 Influence of different media and different phases |
| 10 | 5.3 Influence of pressure differences 5.4 Influence of geometry of the leak path 5.5 Influence of wave propagation |
| 11 | 6 Applications |
| 12 | 7 Instrumentation 7.1 General requirement 7.2 Sensors 7.2.1 Typical frequency ranges (band width) 7.2.2 Mounting method 7.2.3 Temperature range, Wave guide 7.2.4 Intrinsic safety 7.2.5 Immersed sensors 7.2.6 Integral electronics (amplifier, RMS converter, ASL converter, band pass) |
| 13 | 7.3 Portable and non-portable (fixed installed) AE equipment 7.4 Single- and multichannel AE equipment 7.4.1 Single-channel systems 7.4.2 Multi-channel systems 7.5 Measuring features (RMS, ASL vs. Hit or continuous vs. burst) 7.6 Verification using artificial leak noise sources |
| 14 | 8 Test steps for leak detection 8.1 Sensor application 8.2 Measured features 8.3 Background noise |
| 15 | 8.4 Environmental noise 8.5 Process noise 8.6 Data acquisition 9 Location procedures 9.1 General considerations 9.2 Single sensor location – based on AE wave attenuation |
| 16 | 9.3 Multi-sensor location – based on delta-T values (linear, planar) 9.3.1 Threshold level and peak level timing method 9.3.2 Cross correlation method |
| 17 | 9.4 Wave type and wave mode based location |
| 18 | 10 Data presentation 10.1 Numerical data presentation (level-meter) 10.2 Parametric dependent function (e.g. pressure) |
| 19 | 10.3 Frequency spectrum 11 Data interpretation 11.1 Leak validation 11.1.1 On site (during test) and off site (post analysis) 11.1.2 Correlation with pressure 11.1.3 Rejection of false indications |
| 20 | 11.2 Leakage rate estimation 11.3 Demands on follow-up actions 12 QM papers 12.1 Test procedure |
| 21 | 12.2 Test instruction 13 Test documentation and reporting 13.1 Test documentation |
| 22 | 13.2 Test report |
| 23 | Annex A (normative) Examples of leak detection A.1 Performance test of steam traps A.1.1 Steam traps A.1.2 Equipment A.1.3 Personnel A.1.4 Process |
| 24 | A.1.5 Interpretation A.1.6 Documentation |
| 25 | A.2 Applications on pipelines A.2.1 Wave attenuation measurement A.2.2 Cross-correlation A.2.3 Pigging |
| 27 | A.3 Application of leak detection during hydrotest of nuclear pressure equipment A.3.1 Objective-Scope: |
| 28 | A.3.2 Methodology A.3.3 Primary loop hydrotest monitoring A.3.3.1 Sensors positions A.3.3.2 AE monitoring |
| 29 | A.3.3.3 Real time analysis A.3.4 Qualification and main results |
| 30 | A.4 Application on tank floors A.4.1 Scope A.4.2 General A.4.2.1 Introduction A.4.2.2 Test set-up |
| 31 | A.4.2.3 Test performance |
| 32 | A.4.3 Test result A.5 Containment structure leak tightness testing A.5.1 Background A.5.2 Global surveillance A.5.3 Acoustic field mapping around a leak source – local area surveillance |
| 33 | A.5.4 Dependence of leakage noise on pressure differential |
| 35 | Bibliography |
