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Use Of Piezoelectric And Miss Guided Wave Ultrasonic Monitoring Technologies On Underground Piping

Product Number: 51321-16809-SG
Author: Xavier Ortiz; Hossein Jiriyaeisharahi
Publication Date: 2021
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$20.00
$20.00

Guided wave ultrasonic (GWUT) technology has been used for more than 20 years to assess the integrity condition of aboveground and underground piping. An integrity verification of underground piping was conducted using two (2) technologies to generate guided waves. The first technology uses a belt of
piezoelectric sensors in direct contact with the piping surface. The second technology uses a magnetostrictive sensor (MsS) to couple the waves into piping by a cobalt alloy-steel ribbon. The piezoelectric technology was used to inspect a combined 2.2 km of (nominal pipe size) NPS 3, NPS  6, NPS 8, NPS10, NPS 12, and NPS 20 underground piping in 46 segments. The MsS technology was used to inspect a combined 1.025 km of NPS 4, NPS 6, and NPS 8 underground piping in 34 segments. While GWUT has been used by the industry for many years, there is still a lack of information related to its performance when inspecting underground piping. This paper documents the results of using both technologies for integrity verification of underground piping while at the same time providing information regarding the effect of field-related variables such as coating type, coating condition, presence of bends, pipe contents and soil cover among others.

Guided wave ultrasonic (GWUT) technology has been used for more than 20 years to assess the integrity condition of aboveground and underground piping. An integrity verification of underground piping was conducted using two (2) technologies to generate guided waves. The first technology uses a belt of
piezoelectric sensors in direct contact with the piping surface. The second technology uses a magnetostrictive sensor (MsS) to couple the waves into piping by a cobalt alloy-steel ribbon. The piezoelectric technology was used to inspect a combined 2.2 km of (nominal pipe size) NPS 3, NPS  6, NPS 8, NPS10, NPS 12, and NPS 20 underground piping in 46 segments. The MsS technology was used to inspect a combined 1.025 km of NPS 4, NPS 6, and NPS 8 underground piping in 34 segments. While GWUT has been used by the industry for many years, there is still a lack of information related to its performance when inspecting underground piping. This paper documents the results of using both technologies for integrity verification of underground piping while at the same time providing information regarding the effect of field-related variables such as coating type, coating condition, presence of bends, pipe contents and soil cover among others.

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