EFFECT OF WELDING ON A HIGH-DENSITY POLYETHYLENE LINER

High-density polyethylene (HDPE) liners are often used for pipeline rehabilitation. This paper describes ongoing research in which steel sleeves were welded on the outside surface of a steel pipe lined with a HDPE and then tested in the laboratory. Recommendations were made to establish welded joints using stitch welds of length equal to the minimum length specified by the applicable codes, with a center-to-center spacing of three times the weld length. A waiting period may be necessary between consecutive stitch welds, particularly for small-diameter pipes. In a second series of tests, the material performance of a liner strengthened by butt-fused HDPE rings was evaluated. The overall stiffness of the liner increased with the addition of the butt-fused rings. Tension tests were performed on dog bone-shaped samples extruded from the stiffened liner. The butt-fusion process used to attach the stiffening rings increased the average tensile strength and average elasticity modulus of the material in the fusion region.

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/issn/08991561
• Corporate Authors:

  American Society of Civil Engineers

  345 East 47th Street
  New York, NY  United States  10017-2398
• Authors:
  • Bakeer, R M
  • Barber, M E
• Publication Date: 1996-5

Language

• English

Media Info

• Features: Appendices; Figures; References; Tables;
• Pagination: p. 94-100
• Serial:
  • Journal of Materials in Civil Engineering
  • Volume: 8
  • Issue Number: 2
  • Publisher: American Society of Civil Engineers
  • ISSN: 0899-1561
  • EISSN: 1943-5533
  • Serial URL: http://ascelibrary.org/journal/jmcee7

Subject/Index Terms

• TRT Terms: Driver rehabilitation; Ethylene resins; High density; Joints; Modulus of elasticity; Performance; Pipelines; Strength of materials; Tensile strength; Welds
• Uncontrolled Terms: Polyethylene; Rehabilitation; Welded joints
• Old TRIS Terms: Liners
• Subject Areas: Design; Pipelines; Terminals and Facilities;

Filing Info

• Accession Number: 00723366
• Record Type: Publication
• Files: TRIS
• Created Date: Jun 28 1996 12:00AM