Experimental results of ten girth weld and two unreinforced piping intersections recently tested at Paulin Research Group (PRG) are reported. Results are compared to the original Markl work [1–5] and to current ASME piping design code practices [6]. In addition, approximately 800 experimental tests from the literature [7–32] are compared to the new test results and the existing Mark1 equations. Findings indicate that the original mean girth weld equation provided by Mark1, which serves as the basis of the ASME piping codes, does not match trends expected for as-welded fatigue data. Discrepancies are apparent in the low and high cycle regimes. Finally, the new PRG test data and the existing data from literature are used to develop a new mean girth butt weld curve and to modify the existing ASME piping design codes.
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ASME 2008 Pressure Vessels and Piping Conference
July 27–31, 2008
Chicago, Illinois, USA
Conference Sponsors:
- Pressure Vessels and Piping
ISBN:
978-0-7918-4824-1
PROCEEDINGS PAPER
Experimental Evaluation of the Markl Fatigue Methods and ASME Piping Stress Intensification Factors
Chris Hinnant,
Chris Hinnant
Paulin Research Group, Houston, TX
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Tony Paulin
Tony Paulin
Paulin Research Group, Houston, TX
Search for other works by this author on:
Chris Hinnant
Paulin Research Group, Houston, TX
Tony Paulin
Paulin Research Group, Houston, TX
Paper No:
PVP2008-61871, pp. 97-113; 17 pages
Published Online:
July 24, 2009
Citation
Hinnant, C, & Paulin, T. "Experimental Evaluation of the Markl Fatigue Methods and ASME Piping Stress Intensification Factors." Proceedings of the ASME 2008 Pressure Vessels and Piping Conference. Volume 1: Codes and Standards. Chicago, Illinois, USA. July 27–31, 2008. pp. 97-113. ASME. https://doi.org/10.1115/PVP2008-61871
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