API 1156 : 1ED 97 ADD 1 99

EXECUTIVE SUMMARY
1.0 INTRODUCTION
2.0 BACKGROUND
3.0 OVERVIEW OF EXPERIMENTS
     3.1 Types of Dent Experiments, Objectives
          and Results
     3.2 Buckle Experiments
4.0 FINDINGS OF EXPERIMENTAL WORK
5.0 DISCUSSION AND CONCLUSIONS
     5.1 Rerounding (Essentially Unchanged from API
          Publication 1156)
     5.2 Static and Fatigue Strength of Smoothy Dented
          Pipe (Altered Somewhat from API Publication
          1156)
     5.3 Fatigue Resistance in Relation to the Curvature
          of Smoothly Dented Pipe (Significantly
          Different from API Publication 1156)
     5.4 Fatigue Resistance When Minor Stress
          Concentrators Exist in Smooth Dents (Altered
          Somewhat from API Publication 1156)
     5.5 Constrained Dents (Altered Somewhat from API
          Publication 1156)
     5.6 Practical Considerations Regarding Rock Dents
          (Altered Somewhat from API Publication 1156)
     5.7 Buckles
REFERENCES
APPENDIX A. RESULTS OF EXPERIMENTS
APPENDIX B. DESCRIPTIONS OF EXPERIMENTS CONDUCTED DURING
            THE SECOND PHASE
APPENDIX C. FIELD GUIDE FOR ASSESSING DENTS AND BUCKLES

Determines the effects of smooth dents and rock dents on the integrity of liquid petroleum pipelines and to avoid unnecessary repair or replacement of pipelines affected by dents if they do not constitute a threat to pipeline serviceability.