Non-Destructive Examination of Underground Pressure Vessels Using Acoustic Emission (AE) Techniques

Abstract

The methodology of Acoustic Emission (AE) for detecting and monitoring damages, cracks and leaks in different structures is widely used and has earned a reputation recently as one of the most reliable and well-established technique in Non-Destructive Testing (NDT). Besides evaluation of fracture behavior, crack propagation and fatigue detection in metals, composites, wood, fiberglass, ceramics and plastics; it can also be used for detecting faults and pressure leaks in pressure vessels, tanks and pipes.

As a relatively “clean” form of energy, Liquefied Petroleum Gas (LPG) is widely used for industrial applications and domestic heating. Periodic inspection of buried tanks used for LPG storage is complicated and limited because of their underground location. This situation prevents “conventional” NDT techniques from being used. So, AE testing which fulfills all safety requirements, is the most appropriate and cost-effective technique that can be used for periodic inspection and proof testing.

In addition of a general presentation on the AE technology and its applications, this study provides comprehensive evaluation of AE testing techniques of underground LPG tanks during service in accordance with TS EN standards. Some epresentative results and data obtained from a performed AE test are also provided.

Keywords

• Acoustic Emission (AE),Non-Destructive Testing (NDT),Underground LPG Tanks,In-Service Monitoring.

References

1. Tuncel S., (2008), “Latest Developments in The Field of NDT Technologies: Acoustic Emission”, 3rd International Non-Destructive Testing” Symposium and Exhibition, Istanbul Turkey, April 2008.
2. Hellier C. J., (2003), “Handbook of Nondestructive Evaluation”, vol.70, pp.466-470.
3. Petrisa C. D., Siteb C.D., Lenzunic P., Mazzocchib V., Mennutia C., (2004), “An Innovative AE Technique For The Verification of Underground and Buried Pressure Equipment”, ICEM12- 12th International Conference on Experimental Mechanics, Politecnico di Bari, Italy
4. Turkish Standard TS EN 12817, (2010), “LPG Equipment and Accessories - Inspection and Requalification of LPG tanks up to and including 13 m³”, ICS 23.020.30.
5. Turkish Standard TS EN 12819, (2009), “LPG equipment and accessories - Inspection and requalification of LPG tanks greater than 13 m3”, ICS 23.020.30.
6. Turkish Standard TS EN 14584, (2013), “Non-destructive testing - Acoustic emission testing- Examination of metallic pressure equipment during proof testing - Planar location of AE sources”, ICS 17.140.20&77.040.20.
7. Gao L., Zai F., Su F., Wang H., Chen P. and Liu L. (2011), “Study and Application of Acoustic Emission Testing in Fault Diagnosis of Low-Speed Heavy-Duty Gears”, Sensors (Basel). 11(1), pp.599-611.
8. Rashid M.S. and Pullin R., (2014), “The Sound of Orthopaedic Surgery - The Application of Acoustic Emission Technology in Orthopaedic Surgery: A Review”, Eur J. Orthop. Surg. Traumatol 24:1–6.

9. Safari A., (2006), “Acoustic Emission Analysis of the Effect of a 2D Wedge Shaped Blade on the Compact Bone Cutting Process”, Department of Mechanical and Electronic Engineering School of Engineering Institute of Technology Sligo.
10. Muravin B (2009), “Acoustic Emission Science and Technology”, J Build Infrastruct Eng Israeli Assoc. Eng. Archit Israel.
11. Nielson A (1980), “Acoustic Emission Source Based on Pencil Lead Breaking”, Report 80-15, Danish Welding Institute.
12. Huang M.,Jiang L., Liaw P.K., Brooks C.R., Seeley R., and Klarstrom D.L., (2009),” Using Acoustic Emission in Fatigue and Fracture”, Materials Research, Nondestructive Evaluation: Overview, University of Tennessee.
13. Federal Institute for Materials Research and Testing (2008), “Evaluation of Composite Cylinders Using Acoustic Emission”, Hydrogen Storage Systems for Automotive Application. Acoustic
14. Emission Instrumentations, http://iti.northwestern.edu.
15. Akustik Emisyon, http://www.tr-tuv.com.tr.
16. McCormick R.R., (2007), “Advancements In Acoustic Emission Testing Of Steel Highway Bridges”, Report, Infrastructure Technology Institute, School of Engineering and Applied Science, Northwestern University.
17. Gholizadeh S., Leman Z. and Baharudin B.T.H.T, (2015), “A Review of The Application of Acoustic Emission Technique in Engineering”, Structural Engineering and Mechanics, Vol. 54, No. 6, pp. 1075-1095.
18. Turkish Standard TS 11634, (1995), “Nondestructive Testing-Guidelines for mounting Piezoelectric Acoustic Emission Sensors”, ICS 77.040.20.100.
19. Turkish Standard TS EN 15495, (2008), “Non-destructive testing-Acoustic emission- Examination of metallic pressure equipment during proof testing Zone location of AE sources”.
20. European Standard EN 13554, (2011), “Non-destructive testing - Acoustic emission - General principles”, ICS 19.100.
21. European Standard EN 13477-1, (2004), “Non-destructive testing - Acoustic emission- Equipment characterization- Part 1: Equipment description”, ICS 19.100.
22. European Standard EN 13477-2, (2010), “Non-destructive testing-Acoustic emission - Equipment characterization- Part 2: Verification of operating characteristic”, ICS 19.100.
23. ISO/DIS 16148.2, “Gas cylinders- Refillable seamless steel gas cylinders-Acoustic emission examination (AEE) for periodic inspection”.