Published: Jan 1977
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The design of the present-day plaque-type penetrameter has changed very little over the past 35 years. Changes have been made in the size of the holes and the identification and correlation of material classes. Other users of penetrameters outside of the United States have been using a wire- or step-type design. Users of penetrameters as well as those who specify them have been under a cloud because of the variations from one code to another. A chart has been included to show the variations in the plaque style. Significant progress by ASTM Subcommittee E07.01 on Radiographic Practice and Penetrameters has been made to bring together the various code-making bodies toward accepting a unified design.
nondestructive tests, standards, penetrameters (radiation), image quality indicators, radiography, materials
President, Arnold Greene Testing Laboratories, Inc., Natick, Mass.