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Title: Seam-weld quality of modern ERW/HFI line pipe

Abstract

This study was undertaken to determine whether the seam-weld quality of modern ERW (electric resistance-welded)/HFI (high-frequency induction) welded pipe has been improved and justifies more widespread use of this type of pipe in critical applications. Wider use of ERW/HFI line pipe in gas-transmission lines would be expected to reduce construction costs. Five recently produced, heavy wall pipes fabricated using high-frequency electric-resistance welding (ERW) processes to make the seam weld and one pipe fabricated using the high-frequency induction (HFI) welding process to make the seam weld were studied. Four of the pipes were Grade X-60, one was Grade X-65, and one was Grade X-70. All of the pipes were produced from microalloyed, controlled-rolled steels, and the weld zones were post-weld normalized. Ultrasonic inspection of the seam welds in the six pipe sections evaluated revealed no indications of defects. The tensile properties of all of the weld zones exceeded the minimum specified yield strengths for the respective grades of pipe and all of the pipes exhibited ductile failures either in the weld zone or in the base metal. Five of the six pipes exhibited ductile failures either in the weld zone or in the base metal. Five of the six pipes exhibitedmore » relatively low 85% shear area transition temperatures and relatively high upper-shelf energy absorptions as determined with Charpy V-notch specimens. In addition, for two of the three joints of pipe for which the properties were determined at both ends of the pipe, the tensile and impact properties showed little variation from end-to-end. However, for the other joint of pipe, the impact properties varied substantially from one end to the other.« less

Authors:
;  [1]
  1. Battelle, Columbus, OH (United States)
Publication Date:
Research Org.:
American Gas Association, Inc., Arlington, VA (United States). Pipeline Research Committee; Battelle, Columbus, OH (United States)
Sponsoring Org.:
American Gas Association, Inc., Arlington, VA (United States)
OSTI Identifier:
10195038
Report Number(s):
NG-18/198
ON: UN94003346; TRN: AHC29315%%25
Resource Type:
Technical Report
Resource Relation:
Other Information: PBD: Sep 1991
Country of Publication:
United States
Language:
English
Subject:
03 NATURAL GAS; 42 ENGINEERING; 36 MATERIALS SCIENCE; NATURAL GAS DISTRIBUTION SYSTEMS; PIPES; RESISTANCE WELDING; INDUCTION WELDING; WELDED JOINTS; ULTRASONIC TESTING; MECHANICAL PROPERTIES; STEELS; YIELD STRENGTH; FAILURES; SHEAR PROPERTIES; DUCTILITY; HARDNESS; EXPERIMENTAL DATA; 032000; 420500; 360101; 360103; TRANSPORT, HANDLING, AND STORAGE; MATERIALS TESTING; PREPARATION AND FABRICATION

Citation Formats

Groeneveld, T P, and Barnes, C R. Seam-weld quality of modern ERW/HFI line pipe. United States: N. p., 1991. Web.
Groeneveld, T P, & Barnes, C R. Seam-weld quality of modern ERW/HFI line pipe. United States.
Groeneveld, T P, and Barnes, C R. 1991. "Seam-weld quality of modern ERW/HFI line pipe". United States.
@article{osti_10195038,
title = {Seam-weld quality of modern ERW/HFI line pipe},
author = {Groeneveld, T P and Barnes, C R},
abstractNote = {This study was undertaken to determine whether the seam-weld quality of modern ERW (electric resistance-welded)/HFI (high-frequency induction) welded pipe has been improved and justifies more widespread use of this type of pipe in critical applications. Wider use of ERW/HFI line pipe in gas-transmission lines would be expected to reduce construction costs. Five recently produced, heavy wall pipes fabricated using high-frequency electric-resistance welding (ERW) processes to make the seam weld and one pipe fabricated using the high-frequency induction (HFI) welding process to make the seam weld were studied. Four of the pipes were Grade X-60, one was Grade X-65, and one was Grade X-70. All of the pipes were produced from microalloyed, controlled-rolled steels, and the weld zones were post-weld normalized. Ultrasonic inspection of the seam welds in the six pipe sections evaluated revealed no indications of defects. The tensile properties of all of the weld zones exceeded the minimum specified yield strengths for the respective grades of pipe and all of the pipes exhibited ductile failures either in the weld zone or in the base metal. Five of the six pipes exhibited ductile failures either in the weld zone or in the base metal. Five of the six pipes exhibited relatively low 85% shear area transition temperatures and relatively high upper-shelf energy absorptions as determined with Charpy V-notch specimens. In addition, for two of the three joints of pipe for which the properties were determined at both ends of the pipe, the tensile and impact properties showed little variation from end-to-end. However, for the other joint of pipe, the impact properties varied substantially from one end to the other.},
doi = {},
url = {https://www.osti.gov/biblio/10195038}, journal = {},
number = ,
volume = ,
place = {United States},
year = {Sun Sep 01 00:00:00 EDT 1991},
month = {Sun Sep 01 00:00:00 EDT 1991}
}

Technical Report:
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