Menu
Search
Filters
Close
Menu

Celebrate World Corrosion Awareness Day with 20% off eCourses and eBooks with code WCAD2024 at checkout!

51318-10919-The Study on Residual Stresses in OCTG and Its Effect on Pipe Sour Cracking (SSC) Performances

Picture for The Study on Residual Stresses in OCTG and Its Effect on Pipe Sour Cracking (SSC) Performances
Available for download

X-Ray diffraction shows that - with hot or cold straightening - there is still a significant amount residual stresses existing in OCTG pipe bodies. A formula was proposed to include the effect of residual stress on determining the sour cracking resistance.

Product Number: 51318-10919-SG
Author: Xin Long / Pete W. Moore
Publication Date: 2018
Industry: Oil and Gas Production
$0.00
$20.00
$20.00

It is well known that residual stresses in a structure can have a detrimental effect on its flaw cracking process. Through a three-dimensional (3D) finite element analysis (FEA) on a six-roll cold straightening process, it was found that seamless oil country tubular goods (OCTG) pipe has a unique residual stresses pattern due to its manufacturing process. An X-Ray diffraction through wall residual stress measurement shows that even with hot straightening, there is still a significant amount residual stresses existing in the pipe body with a similar pattern found in the cold straightened pipe from FEA. The residual stresses were found to have a significant effect on the pipe sour cracking resistance through an internal pressure burst test of a full-size pipe with a pre-existing flaw in sour environment in an American Petroleum Institute (API) study. A formula was proposed to include the effect of residual stress on determining the sour cracking (sulfide stress cracking) resistance on OCTG tubulars.

Keywords: OCTG, tubulars, residual stress, sulfide stress cracking

 

It is well known that residual stresses in a structure can have a detrimental effect on its flaw cracking process. Through a three-dimensional (3D) finite element analysis (FEA) on a six-roll cold straightening process, it was found that seamless oil country tubular goods (OCTG) pipe has a unique residual stresses pattern due to its manufacturing process. An X-Ray diffraction through wall residual stress measurement shows that even with hot straightening, there is still a significant amount residual stresses existing in the pipe body with a similar pattern found in the cold straightened pipe from FEA. The residual stresses were found to have a significant effect on the pipe sour cracking resistance through an internal pressure burst test of a full-size pipe with a pre-existing flaw in sour environment in an American Petroleum Institute (API) study. A formula was proposed to include the effect of residual stress on determining the sour cracking (sulfide stress cracking) resistance on OCTG tubulars.

Keywords: OCTG, tubulars, residual stress, sulfide stress cracking

 

Product tags
Also Purchased
Picture for High strength steel SSC evaluation in mild sour environments at ambient and high temperatures
Available for download

51318-10920-High strength steel SSC evaluation in mild sour environments at ambient and high temperatures

Product Number: 51318-10920-SG
Author: James Wei / Manuel Gonzalez / Brian Chambers / Boris Thomas
Publication Date: 2018
$20.00

There is an increasing need to define the operating envelope for materials typically used as oil country tubular goods. This paper reports results of sulfide stress cracking (SSC) tests that were performed in mild sour environment at temperatures below 107°C.
Picture for Control of Corrosion Inhibitor Fouling in Highly Sour System
Available for download

51318-10918-Control of Corrosion Inhibitor Fouling in Highly Sour System

Product Number: 51318-10918-SG
Author: Sonja Richter / Jay Locklear / Mohsen Achour / Thomas Baugh / Probjot Singh / Ross Goff
Publication Date: 2018
$20.00

Black tar-like fouling material was driving frequent shut-downs of a gas plant. Analysis indicated that the nitrogen containing corrosion inhibitor (CI) polymerized with sulfur compounds in a vulcanization process. Testing confirmed the role of the CI in creating this fouling.
Picture for Titanium Alloy Stress Corrosion Resistance to Methanol Vapor in Hydrocarbon Gas Export Systems
Available for download

51318-10921-Titanium Alloy Stress Corrosion Resistance to Methanol Vapor in Hydrocarbon Gas Export Systems

Product Number: 51318-10921-SG
Author: Ronald W. Schutz / Birendra Jena / Ramgopal Thodla / Heath W. Walker
Publication Date: 2018
$20.00

Susceptibility of Grades 23 and 29 titanium Tapered Stress Joint (TSJ) forgings to gas phase methanolic Stress Corrosion Cracking (SCC) was measured in deaerated, dry 0-0.5 wt.% and saturated methanol-containing methane gas environments at 25C in a two phase laboratory program.
Categories
Industry
Recently viewed
Popular tags
View all

Association for Materials Protection and Performance

© AMPP All Rights Reserved.
Membership Terms of Content Use
Contact Customer Support