Shear Wave UT

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Shear wave UT is used primarily to detect and determine the size of cracks that have developed during service. Forms of deterioration that can result in cracking include mechanical and thermal fatigue, creep, stress-corrosion, and hydrogen attack, among others (see Section 730). Although shear wave UT can provide very good data for the evaluation of the integrity and reliability of a vessel, quality of the data is highly dependent on the skill and expertise of the technician performing the examination. Only highly qualified technicians should be used who have demonstrated their ability to correctly detect and size the types of flaws that might have developed in the vessel.

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