Specification for acceptance levels for internal imperfections in steel plate, strip and wide flats, based on ultrasonic testing

A description of the experience in the development and implementation of a model for forecasting the microstructure of rolled tubular products steel during thermomechanical processing of a semi-finished product and the relative IT-solution for the plate mill 5000 of PJSC MMK is presented. This solution is based on modeling the kinetics of structure formation in the mill technological line. The article describes briefly the result of analysis of a number of existing kinetics models of phase and structural transformations from the point of view of their application under the conditions of interest to us. An empirical study of the thermal effects of phase transformations and the influence of the heat removal mode on the kinetics of structure formation is described. The process of development of an empirical kinetics model and implementation of IT-solution, that implements this model, is also described.

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Using Phased Array Ultrasonic Testing in Lieu of Radiography for Acceptance of Carbon Steel Plate Welds

Volume 5: High-Pressure Technology; ASME NDE Division; 22nd Scavuzzo Student Paper Symposium and Competition ◽

10.1115/pvp2014-28832 ◽

2014 ◽

Author(s):

Traci L. Moran ◽

Michael T. Anderson ◽

Anthony D. Cinson ◽

Susan L. Crawford ◽

Matthew S. Prowant ◽

...

Keyword(s):

Carbon Steel ◽

Ultrasonic Testing ◽

Nuclear Power ◽

Phased Array ◽

Steel Plate ◽

National Laboratory ◽

Pacific Northwest National Laboratory ◽

Nuclear Regulatory Commission ◽

Incomplete Fusion ◽

Replacement Method

The Pacific Northwest National Laboratory (PNNL) is conducting studies for the U.S. Nuclear Regulatory Commission (NRC) to assess the capability, effectiveness, and reliability of ultrasonic testing (UT) as a replacement method for radiographic testing (RT) for volumetric examination of nuclear power plant (NPP) components. This particular study focused on evaluating the use of phased-array (PA) UT on carbon steel plate welds. Welding fabrication flaws included a combination of planar and volumetric types; for example, incomplete fusion, lack of penetration, cracks, porosity, and slag inclusions. The examinations were conducted using PAUT techniques applied primarily for detection and flaw type characterization. This paper will discuss the results of using PAUT in lieu of RT for detection and classification of fabrication flaws in carbon steel plate welds.

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