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Applications

ATTAR has been providing Acoustic Emission Testing (AET) since 1986, offering AET as both an alternative and complementary method to conventional NDT. It offers a high level of plant safety and optimisation in maintenance planning.  ATTAR’s experience in the application of AET includes tanks, gas cylinders, pipelines, bridges, spheres and other conventional pressure vessels, and Elevated Work Platforms (EWPs). ATTAR is NATA accredited for AET and is a certified ‘Gas Cylinder Test Station’ in accordance with AS 2030 and AS 2337.

 

Typical Applications

  • Storage tanks, either atmospheric or pressurised
  • Compressed-Gas Cylinders
  • Fiberglass Reinforced Plastic (FRP) Tanks
  • LPG bullets
  • Larger pressure vessels
  • Seamless steel gas cylinders (fixed or portable)
  • Pipelines
  • Elevating Work Platforms (EWPs)
  • Spherical Tanks
  • Bridges

Bulk Storage Tanks & Tank Floors

AE testing is routinely used as a sorting process where a series of tanks can be classified from best to worst, allowing asset operators to prioritize for maintenance or repair based on results from AE testing. A typical outcome is to establish a retest interval or determine which tanks should be opened for repair and/or inspection first.

             

 

                                                                  

Pressure Vessel Integrity

AS 1210 – Pressure Vessels, suggests the use to AE testing over other methods, such as pneumatic testing in Section 5.11.

AS 3788 – Pressure Equipment – In Service Inspection also calls upon the use of AE Testing as a means of inspection in Appendix D & T.

AE testing also provides a perfect opportunity for testing the integrity of large cryogenic storage tanks/vessels, where emptying, cleaning and heating of the tanks is undesirable.

FRP Pipelines, Structures, Tanks & Gas Cylinders

Fibre-Reinforced Plastic (FRP) is a versatile material used where high strength-to-weight ratios are needed.  AE testing of FRP materials allows a length of pipeline, plant and equipment such as an insulated boom, or structure to be tested regularly and at a lower, safer pressure than hydrostatic testing.

AE testing of FRP materials allows a length of pipeline, plant and equipment such as an insulated boom, or structure to be tested regularly and at a lower, safer pressure than hydrostatic testing.

Large Scale Structural Monitoring

Using an array of AE sensors to monitor large areas of a structure simultaneously during stimulated loading or in-service loading, AE testing can identify whether there are any active discontinuities which require further attention.

Elevated Work Platforms

AE testing satisfies the requirements for periodic inspection intervals of EWP’s and can also be used for integrity assessment following the application of unusually high loads or if damage is experienced.

 

More Applications

AE testing is a viable risk-based test method for a wide range of applications:

  • Used in the transmission and distribution electricity networks, AE testing of partial discharge within transformers allows early detection of insulation breakdown in oil-filled transformers
  • Creep in steam lines can be an insidious problem with unexpected and consequential failure leading to costly repairs and shut downs. AE testing of steam lines provides information on the existence of creep activity to identify the location of and need for more definitive testing using Phased Array and/or TOFD test methods, then planning a cost effective replacement or repair program
  • AE testing can be used to assist in the commissioning stage of various sections of plant, where the behaviour and response of a section of plant to new stresses is important
  • AE testing is used extensively in the aerospace industry and also in laboratory research and development into materials and structure performance