scope:

Two related reports are included in this bulletin: Report 1: Run Moment Fatigue Tests on Pipes with Small (d/D) Branch Connections by D. H. Roarty and Report 2: Evaluation of Branch Connections with r/R Less than 0.5 Subjected to Through-Run Moment Loadings by E. C. Rodabaugh, E. A. Wais, P. Ellenberger and S. E. Moore. The first reports run moment bending fatigue tests of displacement controlled 4-point bending tests in 4" schedule 40 carbon steel pipe, type A106B with three types of branch connections. The second report describes and provides results of through-run moment fatigue tests on branch connection with r/R between 0.1 and 0.25. The tests were made to assist in examining the validity of Code (Section III, Div. 1 of the ASME Boiler and Pressure Vessel Code) methods for evaluating the adequacy of branch connections loaded by cyclic, through-run moments. The fatigue test results in conjunction with available theoretical and measured stress data, lead to suggested changes in the Code. ISSN: 0043-2326 Library of Congress Catalog Card Number: 99-64587 Publication Sponsored by the Pressure Vessel Research Council of the Welding Research Council, Inc.