This paper provides a comparison between the acceptance criteria for ultrasonic inspection for new pressure vessels using ASME Code Case 2235-3, Dutch Standard Report TO 98-54 on Time of Flight Diffraction (TOFD) and API RP 579 Fitness-for-Service. Two case studies using all three standards are performed for two recently constructed pressure vessels. The differences for all three standards are discussed and recommendations for standardization are made.

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