STRESS INDICES AND FLEXIBLE FACTORS FOR MOMENT LOADINGS ON ELBOWS AND CURVED PIPE

Flexibility factors and stress indices for elbows and curved pipe loaded with an arbitrary combination of in-plane, out-of-plane and torsional bending moments are developed for use with the simplified analyses procedures of present-day design codes and standards. An existing analytical method was modified for use in calculating these factors, the equations were programmed for the IBM-360 computer and computed results were compared with experimental data to establish the adequacy of the modified method. Parametric studies were then performed to obtain desired information. The results are presented in both tabular and graphical form. Approximate equations of best fit, developed from the tabulated values, are presented in a form which can be used directly in the codes and standards. The present equations are slightly more conservative than the ones in current use. However, experimental and analytical studies now in progress may indicate further modifications in the stress indices and flexibility factors for elbows.

• Supplemental Notes:
  • The research presented in this paper was sponsored by the U.S. Atomic Energy Commission under contract with the Union Carbide Corporation. Publication was sponsored by the Pressure Vessel Research Committee of the Welding Research Council.
• Corporate Authors:

  American Welding Society

  345 East 47th Street
  New York, NY  United States  10017
• Authors:
  • Dodge, W G
  • Moore, S E
• Publication Date: 1972-12

Subject/Index Terms

• TRT Terms: Pipe; Specifications; Stresses; Structural analysis; Systems
• Old TRIS Terms: Pipe stresses; Piping systems specifications
• Subject Areas: Data and Information Technology; Marine Transportation;

Filing Info

• Accession Number: 00048113
• Record Type: Publication
• Source Agency: American Welding Society
• Report/Paper Numbers: 179 Bulletin
• Files: TRIS
• Created Date: Oct 31 1973 12:00AM