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Author: thomas siewert

Displaying records 11 to 20 of 74 records.
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11. Peer Review Report: PHMSA Programs
Published: 5/14/2008
Authors: Thomas Allen Siewert, Michael Else, Richard Joel Fields, Joe C Bowles, L. James Moore, Philip D. Flenner, Mario Macia, Jerry Rau, Steven E. Powell
Abstract: The Pipeline and Hazardous Materials Safety Administration s (PHMSA) Pipeline Safety Research and Development (R&D) Program held its first structured peer review of active research projects in February 2006 and the most recent peer review on May 2008 ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=854093

12. Peer review report: Pipeline and hazardous materials safety administration, pipeline safety research and development program
Published: 5/14/2008
Authors: Richard Joel Fields, Louis E. Hayden, Thomas J. O'Grady, Joseph David McColskey, Joe C Bowles, T. R. Webb, Christopher N McCowan, Dennis W. Hinnah, Ronald W. Haupt, Thomas Allen Siewert
Abstract: The purpose of this document is to report findings from the research peer reviews held March 27-29, 2007 for PHMSA's Pipeline Safety Research and Development Program. The findings and recommendations in this report derive from the scoring and comment ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=50623

13. HYDROGEN PIPELINE RESEARCH AT NIST
Published: 3/31/2008
Authors: Thomas Allen Siewert, Joseph David McColskey, Angelique N Lasseigne
Abstract: In 2007, the National Institute of Standards and Technology greatly expanded its efforts in support of the use of hydrogen as a fuel.   Various NIST divisions have started projects on measurement needs in the areas of flow rates, storage, mater ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=853598

14. ON LINE MONITORING SYSTEM - AN APPLICATION FOR MONITORING KEY WELDING PARAMETERS OF DIFFERENT WELDING PROCESSES
Published: 11/16/2007
Authors: Thomas Allen Siewert, Ivan Samard¿i¿,, Zvonimir Kolumbi
Abstract: This paper describes the application of an on-line monitoring system for the monitoring, aquisition and processing of key welding parameters. The on-line monitoring system has been successfully applied in practice to measure key welding parameters fo ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=50624

15. The role of metallurgy in the NIST investigation of the world trade center towers collapse
Published: 11/1/2007
Authors: Stephen W Banovic, Timothy J Foecke, William E Luecke, Joseph David McColskey, Christopher N McCowan, Thomas Allen Siewert, Frank W Gayle
Abstract: On August 21, 2002, on the direction of the U.S. Congress, the National Institute of Standards and Technology (NIST) initiated an investigation into the collapse of the World Trade Center (WTC) towers. In support of the overall investigation goals, t ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=900980

16. Cruciform Fillet Welded Joint Fatigue Strength Improvements by Weld Metal Phase Transformations
Published: 10/17/2007
Authors: Philippe P. Darcis, H. Katsumoto, M C Payares-Asprino, S. Liu, Thomas Allen Siewert
Abstract: Arc welding typically generates residual tensile stresses in welded joints, leading to deteriorated fatigue performance of these joints. Volume expansion of the weld metal at high temperatures followed by contraction during cooling induces a local te ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=50526

17. Crack Tip Opening Angle Optical Measurement Methods in Five Pipeline Steels
Published: 10/16/2007
Authors: Philippe P. Darcis, Christopher N McCowan, H. Windhoff, Joseph David McColskey, Thomas Allen Siewert
Abstract: Crack tip opening angle (CTOA) is becoming one of the more widely accepted properties for characterizing fully plastic fracture. In fact, it has been recognized as a measure of the resistance of a material to fracture in cases where there is a large ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=50504

18. Failure of Welded Floor Truss Connections During Collapse of the World Trade Center Towers
Published: 9/3/2007
Authors: Stephen W Banovic, Thomas Allen Siewert
Abstract: As part of the National Institute of Standards and Technology World Trade Center Investigation, failure modes of the connections attaching the composite floor system to the exterior wall of WTC 1 and WTC 2 were surveyed. Metallographic analyses of i ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=853462

19. NIST Workshop on Materials Test Procedures for Hydrogen Pipelines
Series: NIST Interagency/Internal Report (NISTIR)
Report Number: 6649
Published: 9/1/2007
Authors: Thomas Allen Siewert, Joseph David McColskey, Richard E Ricker
Abstract: The Materials Reliability and Metallurgy Divisions have expanded their efforts to advance the technology for the construction, repair, and inspection of pipelines. One key factor is to identify and prioritize the research needs of the pipeline co ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=50600

20. Analysis of Welding Parameter Distribution in Stud Arc Welding
Published: 7/15/2007
Authors: Ivan Samardzic, Stefanija Klaric, Thomas Allen Siewert
Abstract: This paper describes the application of on-line monitoring system for recording welding current and voltage during stud arc welding with a ceramic ferrule. Recorded values of welding current and voltage are analyzed off-line for the weld process wi ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=50536



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