Thrust Restraint Behavior of Pipelines with Mechanically Harnessed Joints

This paper discusses the thrust restraint behavior of mechanically harnessed pipelines subjected to internal pressure. Mechanically harnessed joints, with either a C-clamp or Snap Ring®, are highly nonlinear. The mechanically harnessed joints are quite flexible initially and the stiffness increases rapidly until they behave as welded joints after some level of extension or rotation. The initial flexibility can be considered as slack. This slack can significantly alter the thrust restraint behavior and magnitude of forces and moments of a pipeline with mechanically harnessed joints relative to one with welded joints. This paper presents a discussion on the behavior of pipelines with mechanically harnessed joints at bends. The effects of variation of deflection angles at bends, soil types, and the magnitude of slack are discussed. The application of the procedure to the design of thrust restraint systems with a mix of different pipe types, mix of mechanically harnessed and welded joints, and elbow extensions are discussed. Comparisons are made with thrust restraint of pipe with welded joints.

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/isbn/0784408548
• Corporate Authors:

  American Society of Civil Engineers

  1801 Alexander Bell Drive
  Reston, VA  United States  20191-4400
• Authors:
  • Zarghamee, Mehdi S
  • Eggers, Daniel W
• Conference:
  • Pipelines 2006: Service to the Owner
  • Location: Chicago IL, United States
  • Date: 2006-7-30 to 2006-8-2
• Publication Date: 2006

Language

• English

Media Info

• Media Type: CD-ROM
• Features: Figures; References; Tables;
• Pagination: 7p
• Monograph Title: Pipelines 2006: Service to the Owner, July 30 to August 2, 2006, Chicago, Illinois. Proceedings of the Pipeline Division Specialty Conference

Subject/Index Terms

• TRT Terms: Deflection; Engineering moments; Flexibility; Force; Joints; Pipelines; Soil types; Stiffness; Welds
• Uncontrolled Terms: Mechanically harnessed joints; Pipe bends; Thrust restraint
• Subject Areas: Design; Pipelines; Terminals and Facilities;

Filing Info

• Accession Number: 01082710
• Record Type: Publication
• ISBN: 0784408548
• Files: TRIS
• Created Date: Dec 18 2007 11:31AM