Stress Corrosion Cracking of Pipeline Steels in Fuel Grade Ethanol and Blends

The main aim of this project was to evaluate alternate standard test methods for stress corrosion cracking (SCC) and compare them with the results from slow strain rate test (SSRT) results under equivalent environmental conditions. Another important aim of this project was to develop a phenomenological understanding of SCC of pipeline steels in fuel grade ethanol (FGE) and FGE/gasoline blends. To achieve these objectives, tests were going on in all fours task areas of this project in the last quarter (July to Sept. 2011), when the project was terminated. This report describes the technical work done on different tasks along with the summary of final status of these tasks in terms of key results. The tasks were as follows: (1) Evaluate Tapered Tensile Tests to Determine Threshold Stresses for SCC; (2) Four-Point Bend (FPB) Tests on Pipeline Sections to Simulate Pipeline Loading; (3) Determine the Threshold Stress Intensity Factor for SCC (K sub ISCC) and Crack Growth Rate Measurements (Fracture Mechanics Approach); and (4) Phenomenological Understanding of SCC in FGE.

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Corporate Authors:
Georgia Tech Research Corporation

505 10th Street
Atlanta, GA United States 30332-0415

Pipeline and Hazardous Materials Safety Administration

Department of Transportation
East Building, 2nd Floor, 1200 New Jersey Avenue, SE
Washington, DC United States 20590
Authors:
- Singh, Preet M
Publication Date: 2011-10-30

Language

English

Media Info

Media Type: Digital/other
Edition: Final Report
Features: Figures; Photos; Tables;
Pagination: 25p

Subject/Index Terms

TRT Terms: Cracking; Ethanol; Fuel mixtures; Pipelines; Steel pipe; Stress corrosion; Test procedures
Uncontrolled Terms: Hazardous liquids pipelines
Subject Areas: Materials; Pipelines;

Filing Info

Accession Number: 01640212
Record Type: Publication
Contract Numbers: DTPH56-09-T-000004
Files: TRIS, ATRI, USDOT
Created Date: Jun 20 2017 9:40AM