Pressure reversal study through tensile tests

Abstract

This paper is a summary of the results from a study of the variables related to pressure reversal and was sponsored by the US Department of Transportation, Office of Pipeline Safety. The circumferential pipe stress, which is the most significant variable in pressure reversal, was examined by using tensile specimens and then relating the results to pressurized pipe. A model is proposed that gives some insight into how pressure reversal can be minimized when a section of pipe is being hydrotested. Twenty tensile specimens from X-42 electric resistance welded (ERW) pipe and twenty specimens from X-52 ERW pipe were tested. Each specimen had a machined flaw. The flaw regions were monitored using strain gages and photoelasticity. These tensile tests represent the first phase of a research effort to examine and understand the variables related to pressure reversal. The second phase of this effort will be with pipe specimens and presently is in progress.

Original document

The different versions of the original document can be found in:

• http://dx.doi.org/10.2172/292812

• https://digital.library.unt.edu/ark:/67531/metadc685321/m2/1/high_res_d/292812.pdf

• https://digital.library.unt.edu/ark:/67531/metadc685321/m2/1/high_res_d/292812.pdf,

https://core.ac.uk/display/71168958,

https://digital.library.unt.edu/ark:/67531/metadc685321,

https://academic.microsoft.com/#/detail/71138107