Full Content is available to subscribers

Subscribe/Learn More  >

Material Properties and Flaw Characteristics of Vintage Girth Welds

[+] Author Affiliations
Kunal Kotian, Yong-Yi Wang

Center for Reliable Energy Systems, Dublin, OH

Paper No. IPC2016-64420, pp. V001T03A019; 10 pages
  • 2016 11th International Pipeline Conference
  • Volume 1: Pipelines and Facilities Integrity
  • Calgary, Alberta, Canada, September 26–30, 2016
  • Conference Sponsors: Pipeline Division
  • ISBN: 978-0-7918-5025-1
  • Copyright © 2016 by ASME


Integrity assessment of girth welds in in-service vintage pipelines is sometimes necessary, including regulatory requirements, changes in service or pipe support conditions which may cause additional stress on the girth welds, or “indications” being reported in in-line inspection (ILI). Material properties and flaw characteristics are essential in such assessment, but very little data are available in most cases.

In a PRCI-funded effort, material properties and flaw characteristics of vintage girth welds are generated and analyzed to fill the critical gaps. The output of this effort is being used as the inputs to a vintage girth weld assessment procedure being developed in a separate and parallel effort. The outcome of these efforts collectively allows for the assessment of vintage girth welds, which is a part of an overall integrity management program.

The basic material property data being generated include (i) pipe tensile properties in both hoop and longitudinal directions, (ii) weld metal tensile properties, (iii) macrohardness traverse, and (iv) Charpy impact transition curves with notches in the heat affected zone (HAZ) and deposited weld metal. These data provide essential information on tensile strength, weld strength mismatch, and toughness. In addition, tensile tests were conducted on cross-weld specimens with natural flaws and artificially machined planar flaws. These cross-weld tests provide an indication of the welds’ stress capacity in the presence of flaws. They also provide the apparent toughness which is essential in assessing welds’ tensile strain capacity. All tested girth welds were inspected using radiography and phased array UT. Thus, this work provides a coherent picture of the material properties, flaw characteristics, and stress and strain capacities of the tested vintage girth welds.

Copyright © 2016 by ASME



Interactive Graphics


Country-Specific Mortality and Growth Failure in Infancy and Yound Children and Association With Material Stature

Use interactive graphics and maps to view and sort country-specific infant and early dhildhood mortality and growth failure data and their association with maternal

Citing articles are presented as examples only. In non-demo SCM6 implementation, integration with CrossRef’s "Cited By" API will populate this tab (http://www.crossref.org/citedby.html).

Some tools below are only available to our subscribers or users with an online account.

Related Content

Customize your page view by dragging and repositioning the boxes below.

Related eBook Content
Topic Collections

Sorry! You do not have access to this content. For assistance or to subscribe, please contact us:

  • TELEPHONE: 1-800-843-2763 (Toll-free in the USA)
  • EMAIL: asmedigitalcollection@asme.org
Sign In