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ASME B31J 2023

ASME B31J 2023

$75.42

ASME B31J-2023 Stress Intensification Factors (i-Factors), Flexibility Factors (k-Factors), and Their Determination for Metallic Piping Components

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ASME 2023
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This B31J Standard provides stress intensification factors (i-factors) and flexibility factors (k-factors), with procedures for their determination for metallic piping components and joints. This Standard sets forth stress intensification factors, flexibility factors, and engineering procedures deemed appropriate for the safe determination of the fatigue and sustained load capacity of metallic piping components or joints in typical services.

PDF Catalog

PDF Pages PDF Title
4 CONTENTS
6 FOREWORD
7 ASME B31 COMMITTEE ROSTER
8 CORRESPONDENCE WITH THE B31 COMMITTEE
9 INTRODUCTION
11 ASME B31J-2023 SUMMARY OF CHANGES
12 1 GENERAL
2 DEFINITIONS
3 CONTENTS OF STANDARD
4 REFERENCE
13 Tables
Table 1-1 Flexibility and Stress Intensification Factors
25 Figures
Figure 1-1 Orientations for Sketches 2.1 Through 2.6 of Table 1-1
Table 1-2 Moment-Rotation Relationships for Sketches 2.1 Through 2.6 of Table 1-1
Table 1-3 Flanged End Correction Coefficients for Sketches 2.1 Through 2.6 of Table 1-1
26 Figure 1-2 Orientations for Bends
Figure 1-3 Branch Dimensions
27 Figure 1-4 Flexibility and Stress Intensification Factors for Bends and Miters
Figure 1-5 Flanged End Corrections for Bends and Miters
28 Figure 1-6 Flexibility Element Locations
Figure 1-7 Fillet Weld Contours
29 Figure A-1.1-1 Representative Cantilever Test Arrangements
NONMANDATORY APPENDIX A STRESS INTENSIFICATION FACTOR (SIF) TEST PROCEDURE
A-1 GENERAL
31 Figure A-1.3-1 Displacement and Force or Moment Recorded During Loading and Unloading of a Test Specimen in Both Positive and Negative Directions, With Linear Displacement
A-2 STRESS INTENSIFICATION FACTOR
32 Table A-2.4-1 Stress Intensification Increase Factor
33 A-3 VARIATIONS IN MATERIALS AND GEOMETRY
A-4 TEST REPORT
34 A-5 NONMANDATORY COMMENTARY ON SIF TEST PROCEDURE
36 A-6 REFERENCES
38 Figure B-1-1 Branch Connection Specimen
NONMANDATORY APPENDIX B TEST METHOD FOR DETERMINING BRANCH CONNECTION FLEXIBILITY FACTORS
B-1 GENERAL
39 Figure B-1-2 Multiple k-Factor Tests on Single Assembled Position
Table B-1-1 Load-Deflection Pairs for Single Assembled Orientation Shown in Figure B-1-2
40 Figure B-2-1 Example Flexibility Factor Branch Load Assembly Orientation
B-2 DEFINITIONS
41 B-3 NOMENCLATURE
B-4 TEST PROCEDURE
42 Figure B-4.4-1 Detailed Beam Model for Through-Branch k-Factor Test
43 Figure B-4.4-2 Beam Model
44 Figure B-4.6-1 Load-Displacement Diagram
45 Figure B-6-1 Unreinforced Branch Connection With (Left) and Without Ovalization Restraint Plates in Place
B-5 NUMBER OF TEST SPECIMENS
B-6 VARIATIONS AND SIMILARITIES IN MATERIALS AND GEOMETRY
B-7 TEST REPORT
46 B-8 OVALIZATION RESTRAINT PLATES
B-9 REFERENCES
47 Figure C-2-1 Rotational Stiffness Location Between Two Nodes
NONMANDATORY APPENDIX C USE OF BRANCH CONNECTION FLEXIBILITY FACTORSIN PIPING SYSTEM ANALYSIS
C-1 NOMENCLATURE
C-2 GENERAL
48 Figure C-2-2 Branch Connection In-Plane Direction
C-3 REFERENCES
49 Figure C-2-3 Branch Connection Flexibilities Used on Branch Side Only
Figure C-2-4 Branch Connection Flexibilities Used on Run Side Only
Figure C-2-5 Branch and Run Flexibilities Used Together (in Series)
50 Figure C-2-6 Rotational Flexibility Definitions
Figure C-2-7 Branch and Run SIF and k-Factor Intersection Orientations
51 Figure D-1-1 Standard Sustained Load Setup
NONMANDATORY APPENDIX D SUSTAINED LOAD TEST PROCEDURE
D-1 GENERAL
52 Figure D-1-2 Bend Sustained Load Setup
D-2 DEFINITIONS
53 Figure D-2-1 Load-Displacement Diagram Illustrating Typical Pressure-Sensitive, Not Pressurized, and Not-Pressure-Sensitive Load-Deflection Behavior
D-3 NOMENCLATURE
54 D-4 TEST PROCEDURE
55 Figure D-3-1 Load-Displacement Diagram at ds = 2de Limit
58 D-5 SUSTAINED LOAD EVALUATION USING TEST RESULTS
59 D-6 VARIATIONS AND SIMILARITIES IN MATERIALS AND GEOMETRY
D-7 TEST REPORT
D-8 SAFEGUARDING PRESSURIZED TWICE ELASTIC SLOPE TESTS
60 Table D-8.1-1 Distance and Precaution for Pressurized Twice Elastic Slope Test
61 Table D-8.1-2 Inadvertent Air Volumes in Test Specimens
D-9 NONMANDATORY COMMENTARY ON THE SUSTAINED LOAD TEST PROCEDURE
62 D-10 REFERENCES

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