INFLUENCE OF LAY BARGE MOTIONS ON A DEEP WATER PIPELINE LAID UNDER TENSION

A mathematical model has shown that in deep water, only pitch and roll have a significant effect on the unsupported pipeline. Pitch is more critical with heavier pipelines (e.g., water-filled pipelines). At intermediate depths, surge and to a lesser extent heave are the significant motions. Their influence is greatest at the point of maximum static bending near the sea floor. Increased tension and the use of constant tensioning devices and partial stingers should reduce this problem. Combined effects of surge, heave, and pitch at the top of the unsupported pipeline could be significant at intermediate depths; constant tensioning and partial stingers should help. Slowly varying sea bottom slopes of less than or equal to 4 deg do not change the results appreciably; however, the input parameters must be adjusted. The model can be used to determine maximum barge motions compatible with the integrity of the pipe, and to evaluate new barge designs with less inherent motions.

• Supplemental Notes:
  • Presented at the Office Technology Conference, Houston, Texas, May 18-21, 1969.
• Corporate Authors:

  American Society of Mechanical Engineers

  Two Park Avenue
  New York, NY  United States  10016-5990
• Authors:
  • Brewer, W V
  • Dixon, D A
• Publication Date: 1970-8

Media Info

• Features: References;
• Pagination: p. 595-604
• Serial:
  • ASME Journal of Engineering for Industry
  • Volume: 92
  • Issue Number: 3
  • Publisher: American Society of Mechanical Engineers

Subject/Index Terms

• TRT Terms: Barges; Construction; Pipe laying; Pipelines
• Candidate Terms: Pipe laying ships
• Old TRIS Terms: Pipeline construction
• Subject Areas: Construction; Marine Transportation; Pipelines; Terminals and Facilities;

Filing Info

• Accession Number: 00056442
• Record Type: Publication
• Source Agency: American Petroleum Institute
• Files: TRIS
• Created Date: Jul 15 1974 12:00AM