Tag Archives for Acoustic Emission

Acoustic Emission Testing – Applications and Limitations

AE can be used for the in-service inspection of pressure vessels to detect cracks that have resulted from any form of deterioration during service that can cause cracking. It can be a very sensitive NDE method for detecting cracks, but … Continue reading

29. April 2018 by Jack
Categories: In-Service Inspection | Tags: | Leave a comment

Acoustic Emission Testing – Data Analysis

The data obtained from an acoustic emission test of a pressure vessel are analyzed to determine the existence of flaws and their locations in the shell of the vessel. Accurate analysis of the data is highly dependent upon the expertise … Continue reading

29. April 2018 by Jack
Categories: In-Service Inspection | Tags: | Leave a comment

Acoustic Emission Testing – Acoustic Sensors and Instrumentation

Most acoustic sensors used for acoustic emission testing of pressure vessels employ piezoelectric ceramic elements that convert the stress waves (i.e., acoustic emissions) propagating through the vessel shell into electrical impulses. These sensors are usually attached to the vessel shell … Continue reading

29. April 2018 by Jack
Categories: In-Service Inspection | Tags: | Leave a comment

Acoustic Emission Testing – Test Pressure

Acoustic emission tests of a pressure vessel are usually conducted by filling the vessel with water, and slowly increasing the hydrostatic pressure until it exceeds the maximum pressure that the vessel has experienced during recent operation. Early development of acoustic … Continue reading

29. April 2018 by Jack
Categories: In-Service Inspection | Tags: | Leave a comment

Acoustic Emission Testing – Physical Principles

Sonic impulses are emitted by a flaw in a ductile material subjected to a gradually increasing applied stress, due to the release of strain energy in the intensified stress field associated with the flaw. The release of strain energy creates … Continue reading

29. April 2018 by Jack
Categories: In-Service Inspection | Tags: | Leave a comment

Acoustic Emission Testing (AE)

AE was developed to assess the integrity of pressure-containing equipment in the nuclear power industry. Acoustic sensors are attached to the O.D. surface of the equipment to detect and locate flaws in the material during a pressure test. AE can … Continue reading

29. April 2018 by Jack
Categories: In-Service Inspection | Tags: | Leave a comment