Full Content is available to subscribers

Subscribe/Learn More  >

Initial Quantification of the Effect of Ambient Humidity on the Strength of Non-Metallic Repairs of Piping and Pressure Vessels

[+] Author Affiliations
David J. Gribble, Roger H. Walker

Citadel Technologies, Tulsa, OK

Jesse J. French

LeTourneau University, Longview, TX

Paper No. PVP2012-78644, pp. 49-53; 5 pages
  • ASME 2012 Pressure Vessels and Piping Conference
  • Volume 3: Design and Analysis
  • Toronto, Ontario, Canada, July 15–19, 2012
  • Conference Sponsors: Pressure Vessels and Piping Division
  • ISBN: 978-0-7918-5502-7
  • Copyright © 2012 by ASME


Composite repairs of pressure vessels and transmission pipelines are installed in a wide variety of ambient conditions. The installation of epoxies utilized can range from arid environments with almost no humidity to tropical conditions of nearly 100% humidity or even completely submerged in water. This paper presents the methodology and results from an initial effort to determine the effects of humidity on the strength of certain epoxy matrix composite repairs.

The effect on final strength of a composite repair specimen cured under a variety of ambient humidity is presented from experimentation with specimens cured below 20% humidity and at approximately 96% humidity in a climate controlled chamber. The effects on final strength, stiffness, and hardness, are observed and recorded to note the difference between the varying conditions. The compilation of data is analyzed to determine what considerations need to be made for various levels of humidity at the time of installation for composite repairs installed on pressure vessels and piping.

Results are presented to show that prediction of curing time and final strength are achievable with reasonable accuracy given sufficiently accurate humidity measurement during the curing process.

Copyright © 2012 by ASME



Interactive Graphics


Country-Specific Mortality and Growth Failure in Infancy and Yound Children and Association With Material Stature

Use interactive graphics and maps to view and sort country-specific infant and early dhildhood mortality and growth failure data and their association with maternal

Citing articles are presented as examples only. In non-demo SCM6 implementation, integration with CrossRef’s "Cited By" API will populate this tab (http://www.crossref.org/citedby.html).

Some tools below are only available to our subscribers or users with an online account.

Related Content

Customize your page view by dragging and repositioning the boxes below.

Related eBook Content
Topic Collections

Sorry! You do not have access to this content. For assistance or to subscribe, please contact us:

  • TELEPHONE: 1-800-843-2763 (Toll-free in the USA)
  • EMAIL: asmedigitalcollection@asme.org
Sign In