Server maintenance is scheduled for Saturday, December 21st between 6am-10am CST.

During that time, parts of our website will be affected until maintenance is completed. Thank you for your patience.

Menu
Search
Filters
Close
Menu

51318-11204-Nondestructive Evaluation for Yield Strength and Toughness of Steel Pipelines

Picture for Nondestructive Evaluation for Yield Strength and Toughness of Steel Pipelines
Available for download

This paper describes two new and complementary mechanical testing methods recently applied to vintage pipeline steels as input to integrity management.

Product Number: 51318-11204-SG
Author: S. D. Palkovic / K. Taniguchi / S. C. Bellemare
Publication Date: 2018
Industry: Pipelines, Tanks, and Underground Systems
$0.00
$20.00
$20.00

Material mechanical property data including fracture toughness help address potential integrity threats such as material loss through corrosion, stress corrosion cracking (SCC), and fatigue. In- the-ditch (ITD) nondestructive evaluation (NDE) of mechanical properties has expanded beyond traditional hardness testing to provide measurements of strength and fracture toughness of metals without the need for sample removal and laboratory testing. This paper describes two new and complementary mechanical testing methods recently applied to vintage pipeline steels as input to integrity management. In the first method, hard blunt styluses of different geometries slide over the pipe surface at constant loads to measure material hardness. The hardness values for dissimilar styluses are input into predictive equations to determine the yield strength and ultimate tensile strength of the steel. When performed over longitudinal seams or girth welds, the tests identify the heat treatment including normalization. In the second method, the instrument is equipped with a wedged-shaped stylus that includes an opening, or stretch passage, where material is locally subjected to tension that results in microvoid growth and coalescence that match laboratory ductile fracture. The material response is correlated with the fracture toughness through measuring the crack tip opening displacement. Field studies and validation provide examples of application of the methods.

 

 

Material mechanical property data including fracture toughness help address potential integrity threats such as material loss through corrosion, stress corrosion cracking (SCC), and fatigue. In- the-ditch (ITD) nondestructive evaluation (NDE) of mechanical properties has expanded beyond traditional hardness testing to provide measurements of strength and fracture toughness of metals without the need for sample removal and laboratory testing. This paper describes two new and complementary mechanical testing methods recently applied to vintage pipeline steels as input to integrity management. In the first method, hard blunt styluses of different geometries slide over the pipe surface at constant loads to measure material hardness. The hardness values for dissimilar styluses are input into predictive equations to determine the yield strength and ultimate tensile strength of the steel. When performed over longitudinal seams or girth welds, the tests identify the heat treatment including normalization. In the second method, the instrument is equipped with a wedged-shaped stylus that includes an opening, or stretch passage, where material is locally subjected to tension that results in microvoid growth and coalescence that match laboratory ductile fracture. The material response is correlated with the fracture toughness through measuring the crack tip opening displacement. Field studies and validation provide examples of application of the methods.

 

 

Product tags
Also Purchased
Picture for Analysis of Long-Term Data Logging Measurements on Pipelines Influenced by LRT Stray Current
Available for download

51318-11215-Analysis of Long-Term Data Logging Measurements on Pipelines Influenced by LRT Stray Current

Product Number: 51318-11215-SG
Author: Erik Llewellyn / Zachary Sharon
Publication Date: 2018
$20.00

Information is presented on field data collection and management, data correlation, data analysis, and future considerations for stray current monitoring.
Picture for 51318-11210- Manipulator Robot for Cathodic Protection Site Survey
Available for download

51318-11210- Manipulator Robot for Cathodic Protection Site Survey

Product Number: 51318-11210-SG
Author: Joffin George
Publication Date: 2018
$20.00

This paper presents the conceptual design of a manipulator robot for cathodic protection site surveys and some of the major applications of the same.
Picture for 51318-11218-A Case Study of Soil-Side Corrosion of Aboveground Storage Tanks in the Middle East
Available for download

51318-11218-A Case Study of Soil-Side Corrosion of Aboveground Storage Tanks in the Middle East

Product Number: 51318-11218-SG
Author: Hanan Farhat
Publication Date: 2018
$20.00

Soil-side corrosion of the bottom plates of aboveground storage tanks is the main cause of tank failure. A case study is discussed in this paper, in which failures of three storage tanks were investigated. Soil analysis revealed high salt content and low resistivity.
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