This report describes two methods of analysis of ultrasonic examination data obtained in a 13-team round-robin examination of three intentionally flawed weldments. The objective of the examinations is to determine the accuracy of independently detecting@ locating@ and sizing the weld flaws using a fixed procedure. The procedure@ based upon the requirements of Section XI of the ASME Boiler and Pressure Vessel Code@ for ultrasonic examination of nuclear vessels@ calls for multiple examinations from specified directions using specified ultrasonic beam angles. To provide a simulation of the restrictions encountered in field in-service examinations for which the requirements were intended@ the examinations were strictly controlled to limit the specimen surfaces and search paths that could be used. The weldments are part of a series prepared by the PVRC Subcommittee on Nondestructive Examination for use in evaluating ultrasonic@ radiographic@ and advanced methods for volumetric examinations of heavy-section welds. In this program@ the welds examined consist of a 24-in.-long butt weld in 8-in.-thick flat plate and two full-penetration nozzle welds in 8-in. base plates; one of the nozzle base plates is formed on a radius to simulate a shell section.
BULLETIN 257-1980 history
1980BULLETIN 257-1980 ANALYSIS OF THE ULTRASONIC EXAMINATIONS OF PVRC WELD SPECIMENS 155@ 202@ AND 203 BY STANDARD AND TWO-POINT COINCIDENCE METHODS