AS 2177.2-1982

1 - AS 2177, PART 2-1982 RADIOGRAPHY OF WELDED BUTT JOINTS IN METAL - IMAGE QUALITY INDICATORS (IQI) AND RECOMMENDATIONS FOR T
4 - PREFACE
5 - CONTENTS
6 - FOREWORD
13 - SECTION 1. SCOPE, DEFINITIONS AND GENERAL REQUIREMENTS
13 - 1.1 SCOPE.
13 - 1.2 DEFINITIONS.
13 - 1.3 REQUIRED CHARACTERISTICS OF IQI.
13 - 1.3.1 Wire IQI (W).
14 - 1.3.2 Step/Hole IQI (SH).
16 - SECTION 2. RECOMMENDATIONS OF THE USE OF IQI
16 - 2.1 SELECTION OF IQI.
16 - 2.2 LOCATION OF IQI.
16 - 2.2.1 Plate Weld Testing.
16 - 2.2.2 Pipe Weld Testing.
16 - 2.2.3 Irregular Objects.
16 - 2.3 VIEWING OF RADIOGRAPHS.
16 - 2.3.1 Visual Acuity.
16 - 2.3.2 Viewing Conditions.
16 - 2.4 ASSESSMENT OF IQI PERCENT SENSITIVITY.
16 - 2.4.1 General.
16 - 2.4.2 Wire Type (W) Assessments.
17 - 2.4.3 Step/Hole (SH) Assessments
17 - 2.4.4 Plaque/Hole (PH) Assessments
17 - 2.4.5 Nomograph for Assessing Plaque/Hole or Step/Hole IQI Sensitivity.
17 - 2.5 EQUIVALENT SENSITIVITY.
22 - APPENDIX A - MATERIALS OF CONSTRUCTION OF IMAGE QUALITY INDICATORS
22 - A1 GENERAL.
22 - A2 SELECTION OF IQI BASED ON MATERIALS OF EQUIVALENT ABSORPTION.
23 - APPENDIX B - TYPICAL EXAMPLES OF FILM TYPES

Cover dimensions, materials, construction and marking of wire, step/hole and plaque/hole type IQI used for assessing the sensitivity of the radiographic process in revealing the presence of discontinuities. Standard models of each type are illustrated. Recommendations are given for the selection and location of IQI, the viewing of radiographs, and assessment of the IQI percent sensitivity. A graph showing relative sensitivity values for different types of IQI is given in an appendix.