Influence of the thermal insulation layer on radial stress and collapse resistance of subsea wet insulation pipe

The analytical solutions of stress and displacement at the bond between two adjacent layers of composite pipe (including wet insulation pipe) and a new design equation for the external pressure of wet insulation pipe are proposed in this paper. The stress distribution and bearing capacity of wet insulation pipe have been exploded. A series of 3D models are developed in commercial finite element software to discuss the influence factors of radial stress and compare numerical results with analytical solutions. Results showed that the distribution of radial stress and displacement is influenced by wall thickness, modulus of elasticity and Poisson's ratio of each layer. When other conditions remain unchanged, the radial stress at the bond between two adjacent layers increases with the increase of internal pressure and outer wall thickness; the radial stress decreases with the increase of inner wall thickness, modulus of elasticity and Poisson's ratio of outer layer. Under external pressure, the radial stress will first increases and then decreases along radial direction from outside to inside, and it will reach the maximum at the bond between insulation layer and steel pipe. This phenomenon will increase pressure loaded on the outer surface of steel pipe, which makes wet insulation pipe more prone to collapse. Consequently, in some cases, for the same size of steel pipe, the collapse pressure of wet insulation pipe is smaller than that of internal steel pipe.

• Record URL:
  https://doi.org/10.1016/j.oceaneng.2021.109374
• Record URL:
  http://www.sciencedirect.com/science/article/pii/S0029801821007885
• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/issn/00298018
• Supplemental Notes:
  • © 2021 Elsevier Ltd. All rights reserved. Abstract reprinted with permission of Elsevier.
• Authors:
  • Zhang, Haoran
  • Yang, Yongchun
  • 0000-0002-2912-6294
  • Huang, Weiping
• Publication Date: 2021-9-1

Language

• English

Media Info

• Media Type: Web
• Features: Figures; References; Tables;
• Serial:
  • Ocean Engineering
  • Volume: 235
  • Issue Number: 0
  • Publisher: Pergamon
  • ISSN: 0029-8018
  • EISSN: 1873-5258
  • Serial URL: http://www.sciencedirect.com/science/journal/00298018

Subject/Index Terms

• TRT Terms: Collapse strength; Heat insulating materials; Ocean engineering; Pressure; Stresses; Underwater pipelines
• Subject Areas: Marine Transportation; Pipelines;

Filing Info

• Accession Number: 01777115
• Record Type: Publication
• Files: TRIS
• Created Date: Jul 23 2021 3:25PM