The application of neutron diffraction to stress mapping in pipeline steels: Measurement of residual, applied, and defect-induced stresses
- Queen`s Univ., Kingston, Ontario (Canada)
- AECL, Chalk River, Ontario (Canada). Chalk River Labs.
Gas pipelines are inspected for defects including generalized corrosion, localized corrosion and environmentally-induced cracking. The most common in-line corrosion inspection tools utilize the magnetic flux leakage (MFL) technique, which is also sensitive to the pipeline stress state. Accurate determination of the residual, applied (bulk) and local defect-induced stresses is therefore essential to understand how stress affects MFL signals. This paper summarizes the results of the following work: (1) Measurement of residual stresses in a section of X70 pipe, using neutron diffraction. (2) Examination with neutron diffraction of the local stresses surrounding a blind (i.e., 50% through-wall) hole defect in the X70 pipe wall section, when the section is subjected to a bending stress in the hoop direction.
- OSTI ID:
- 418165
- Report Number(s):
- CONF-960706-; ISBN 0-7918-1769-5; TRN: IM9705%%543
- Resource Relation:
- Conference: American Society of Mechanical Engineers (ASME) pressure vessels and piping conference, Montreal (Canada), 21-26 Jul 1996; Other Information: PBD: 1996; Related Information: Is Part Of NDE engineering codes and standards and materials characterization. PVP-Volume 322; NDE-Volume 15; Cook, J.F. Sr. [ed.] [Idaho National Engineering Lab., Idaho Falls, ID (United States)]; Cowfer, D.C. [ed.] [Savannah River Lab., Aiken, SC (United States)]; Monahan, C.C. [ed.] [Memorial Univ. of Newfoundland, St. John`s, Newfoundland (Canada)]; PB: 100 p.
- Country of Publication:
- United States
- Language:
- English
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