CONTROL OF CONCRETE JACKET WEIGHT IS CRITICAL

The concrete jacket of a submarine pipeline is for weight (buoyancy) control rather than strength; however, for pipelines installed by bottom pull, the winch capacity may be the weight-limiting factor. The weight and size of the pipe and wrap are easier to control than the weight of concrete jacket. Jacket weight is a function of weight per cubic foot, jacket thickness, and the loss or gain of water between fabrication and installation. For example, in the case of a 48 in. pipe with a 5 in. thick concrete jacket, a difference in concrete density of only 1 lb/cu ft can cause a 12 lb/ft difference in the negative buoyancy of the line. Field control methods involve control of diameter tolerance and deisgn to theoretical concrete density of the mix in the field, which approximates the ultimate wet weight density.

• Corporate Authors:

  Petroleum Engineer Publishing Company

  Box 1589
  Dallas, TX  United States  75221
• Authors:
  • Amos, C L
  • Dantz, P A
• Publication Date: 1970-4

Media Info

• Pagination: 4 p.
• Serial:
  • Pipeline Engineer
  • Volume: 42
  • Issue Number: 4
  • Publisher: Petroleum Engineer Publishing Company

Subject/Index Terms

• TRT Terms: Buoyancy; Construction; Pipelines
• Old TRIS Terms: Pipeline buoyancy; Pipeline construction
• Subject Areas: Construction; Marine Transportation; Pipelines; Terminals and Facilities;

Filing Info

• Accession Number: 00056123
• Record Type: Publication
• Source Agency: American Petroleum Institute
• Files: TRIS
• Created Date: Jul 15 1974 12:00AM