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Marvin J. Cohn
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Proceedings Papers

A Multi-Scale Creep, Fatigue, and Creep-Fatigue Interaction Model for Estimating Reliability of Steel Components at Elevated Temperatures

Jeffrey T. Fong, Pedro V. Marcal, Marvin J. Cohn, N. Alan Heckert
Proc. ASME. PVP2023, Volume 1: Codes & Standards, V001T01A020, July 16–21, 2023
Publisher: American Society of Mechanical Engineers
Paper No: PVP2023-106834
https://doi.org/10.1115/PVP2023-106834
View Paper titled, A Multi-Scale Creep, Fatigue, and Creep-Fatigue Interaction Model for Estimating Reliability of Steel Components at Elevated Temperatures
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Topics: Creep, Damage, Failure, Fatigue, Inspection, Modeling, Pipes, Pressure vessels, Probability, Reliability
Proceedings Papers

A Failure-Probability- and Damage-State-Based Fatigue and Creep Model for Estimating Reliability of Stainless Steel 316L(N) Components in Thermal Fatigue

Jeffrey T. Fong, Pedro V. Marcal, Marvin J. Cohn, N. Alan Heckert
Proc. ASME. PVP2023, Volume 1: Codes & Standards, V001T01A019, July 16–21, 2023
Publisher: American Society of Mechanical Engineers
Paper No: PVP2023-106831
https://doi.org/10.1115/PVP2023-106831
View Paper titled, A Failure-Probability- and Damage-State-Based Fatigue and Creep Model for Estimating Reliability of Stainless Steel 316L(N) Components in Thermal Fatigue
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Topics: Creep, Damage, Failure, Fatigue, Inspection, Modeling, Pipes, Power stations, Pressure vessels, Probability
Proceedings Papers

Technical Justification to Extend Girth Weld Examination Intervals

Marvin J. Cohn
Proc. ASME. PVP2022, Volume 4A: Materials and Fabrication, V04AT06A044, July 17–22, 2022
Publisher: American Society of Mechanical Engineers
Paper No: PVP2022-85728
https://doi.org/10.1115/PVP2022-85728
View Paper titled, Technical Justification to Extend Girth Weld Examination Intervals
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Topics: Creep, Damage, Design, Maintenance, Manufacturing, Mechanical engineers, Nondestructive evaluation, Pipes, Piping systems, Power Piping Code
Proceedings Papers

High Energy Piping Walkdowns in Compliance With ASME B31.1

Marvin J. Cohn, Robert J. Gialdini, Osborne B. Nye, III
Proc. ASME. PVP2021, Volume 4: Materials and Fabrication, V004T06A035, July 13–15, 2021
Publisher: American Society of Mechanical Engineers
Paper No: PVP2021-62533
https://doi.org/10.1115/PVP2021-62533
View Paper titled, High Energy Piping Walkdowns in Compliance With ASME B31.1
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Topics: Pipes
Proceedings Papers

Cumulative Creep Damage Using Advanced Predictive Analysis

Marvin J. Cohn, Michael T. Cronin, Michael C. Liu, Nikhil Kumar, Martin Gascon
Proc. ASME. PVP2021, Volume 4: Materials and Fabrication, V004T06A036, July 13–15, 2021
Publisher: American Society of Mechanical Engineers
Paper No: PVP2021-62535
https://doi.org/10.1115/PVP2021-62535
View Paper titled, Cumulative Creep Damage Using Advanced Predictive Analysis
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Topics: Creep, Damage, Pipes, Stress
Proceedings Papers

Creep Life Evaluations of ASME B31.1 Allowance for Variation From Normal Operations: 11 Materials

Marvin J. Cohn, Ron Haupt
Proc. ASME. PVP2019, Volume 6A: Materials and Fabrication, V06AT06A059, July 14–19, 2019
Publisher: American Society of Mechanical Engineers
Paper No: PVP2019-93734
https://doi.org/10.1115/PVP2019-93734
View Paper titled, Creep Life Evaluations of ASME B31.1 Allowance for Variation From Normal Operations: 11 Materials
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Topics: Carbon steel, Clearances (Engineering), Creep, Pressure, Temperature
Proceedings Papers

Power Piping Grade 91 In-Service Cracks

Marvin J. Cohn, Steve R. Paterson, Keith Rapkin, Charles Henley, Erick Liebl, Michael Johnson
Proc. ASME. PVP2019, Volume 6A: Materials and Fabrication, V06AT06A061, July 14–19, 2019
Publisher: American Society of Mechanical Engineers
Paper No: PVP2019-93869
https://doi.org/10.1115/PVP2019-93869
View Paper titled, Power Piping Grade 91 In-Service Cracks
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Topics: Creep, Damage, Fracture (Materials), Power Piping Code
Proceedings Papers

Large Ranges in Power Piping Girth Weld Creep Rupture Lives

Marvin J. Cohn, Fatma G. Faham
Proc. ASME. PVP2019, Volume 6A: Materials and Fabrication, V06AT06A062, July 14–19, 2019
Publisher: American Society of Mechanical Engineers
Paper No: PVP2019-93931
https://doi.org/10.1115/PVP2019-93931
View Paper titled, Large Ranges in Power Piping Girth Weld Creep Rupture Lives
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Topics: Creep, Damage, Pipes, Power Piping Code, Rupture, Stress
Proceedings Papers

Uncertainty in Multi-Scale Creep Rupture Life Modeling and a New Approach to Estimating Frequency of In-Service Inspection of Components at Elevated Temperatures

Jeffrey T. Fong, N. Alan Heckert, James J. Filliben, Marvin J. Cohn
Proc. ASME. ETAM2018, ASME 2018 Symposium on Elevated Temperature Application of Materials for Fossil, Nuclear, and Petrochemical Industries, V001T04A002, April 3–5, 2018
Publisher: American Society of Mechanical Engineers
Paper No: ETAM2018-6711
https://doi.org/10.1115/ETAM2018-6711
View Paper titled, Uncertainty in Multi-Scale Creep Rupture Life Modeling and a New Approach to Estimating Frequency of In-Service Inspection of Components at Elevated Temperatures
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Topics: Creep, In-service inspection, Modeling, Rupture, Temperature, Uncertainty, Failure, American Petroleum Institute, Inspection, Algorithms
Proceedings Papers

Fitness-for-Service Evaluation of a Gr 91 to Gr 22 Dissimilar Metal Weldment Subject to Creep

Marvin J. Cohn, Michael T. Cronin, Fatma Faham
Proc. ASME. ETAM2018, ASME 2018 Symposium on Elevated Temperature Application of Materials for Fossil, Nuclear, and Petrochemical Industries, V001T05A001, April 3–5, 2018
Publisher: American Society of Mechanical Engineers
Paper No: ETAM2018-6721
https://doi.org/10.1115/ETAM2018-6721
View Paper titled, Fitness-for-Service Evaluation of a Gr 91 to Gr 22 Dissimilar Metal Weldment Subject to Creep
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Topics: Creep, Fitness-for-service, Metals, Pipes, Stress, Wall thickness, Fracture (Materials), Fracture mechanics, Nondestructive evaluation, Stress analysis (Engineering)
Proceedings Papers

Enhanced Creep Life Evaluations for Grade 91 Circumferential Weldments

Marvin J. Cohn
Proc. ASME. PVP2017, Volume 6B: Materials and Fabrication, V06BT06A005, July 16–20, 2017
Publisher: American Society of Mechanical Engineers
Paper No: PVP2017-65815
https://doi.org/10.1115/PVP2017-65815
View Paper titled, Enhanced Creep Life Evaluations for Grade 91 Circumferential Weldments
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Topics: Creep, Stress, Rupture, Pipes, Hoop stress, Piping systems, Temperature, Damage, Design, Power Piping Code
Proceedings Papers

Fitness-for-Service Creep Life Evaluation of a Hot Reheat Piping System at 400,000 Operating Hours

Marvin J. Cohn
Proc. ASME. PVP2017, Volume 6B: Materials and Fabrication, V06BT06A007, July 16–20, 2017
Publisher: American Society of Mechanical Engineers
Paper No: PVP2017-65834
https://doi.org/10.1115/PVP2017-65834
View Paper titled, Fitness-for-Service Creep Life Evaluation of a Hot Reheat Piping System at 400,000 Operating Hours
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Topics: Creep, Fitness-for-service, Piping systems, Welded joints, Nondestructive evaluation, Damage, Pipes, Rupture, Simulation, Stress
Proceedings Papers

A Statistical Approach to Estimating a 95% Confidence Lower Limit for the Design Creep Rupture Time vs. Stress Curve When the Stress Estimate Has an Error Up to 2%

Jeffrey T. Fong, James J. Filliben, N. Alan Heckert, Pedro V. Marcal, Marvin J. Cohn
Proc. ASME. PVP2016, Volume 1B: Codes and Standards, V01BT01A055, July 17–21, 2016
Publisher: American Society of Mechanical Engineers
Paper No: PVP2016-63350
https://doi.org/10.1115/PVP2016-63350
View Paper titled, A Statistical Approach to Estimating a 95% Confidence Lower Limit for the Design Creep Rupture Time vs. Stress Curve When the Stress Estimate Has an Error Up to 2%
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Topics: Creep, Design, Errors, Rupture, Stress, Fatigue, Pipes, Steam, American Petroleum Institute, Damage
Journal Articles

Creep Life Evaluations of ASME B31.1 Allowance for Variation From Normal Operation

Marvin J. Cohn
Journal: Journal of Pressure Vessel Technology
Publisher: ASME
Article Type: Research-Article
J. Pressure Vessel Technol. August 2016, 138(4): 041405.
Paper No: PVT-15-1146
https://doi.org/10.1115/1.4031747
Published Online: April 28, 2016
View Article titled, Creep Life Evaluations of ASME B31.1 Allowance for Variation From Normal Operation
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Topics: Base metals, Clearances (Engineering), Creep, Rupture, Stress
Journal Articles

Ranking of Creep Damage in Main Steam Piping System Girth Welds Considering Multiaxial Stress Ranges

Marvin J. Cohn, Fatma G. Faham, Dipak Patel
Journal: Journal of Pressure Vessel Technology
Publisher: ASME
Article Type: Research-Article
J. Pressure Vessel Technol. August 2016, 138(4): 041202.
Paper No: PVT-15-1147
https://doi.org/10.1115/1.4033077
Published Online: April 28, 2016
View Article titled, Ranking of Creep Damage in Main Steam Piping System Girth Welds Considering Multiaxial Stress Ranges
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Topics: Creep, Pipes, Piping systems, Stress, Damage, Pressure
Proceedings Papers

Optimization of NDE Reexamination Locations and Intervals for Grade 91 Piping System Girth Welds

Marvin J. Cohn, Michael T. Cronin, Fatma G. Faham, David A. Bosko, Erick Liebl
Proc. ASME. PVP2015, Volume 6A: Materials and Fabrication, V06AT06A069, July 19–23, 2015
Publisher: American Society of Mechanical Engineers
Paper No: PVP2015-45630
https://doi.org/10.1115/PVP2015-45630
View Paper titled, Optimization of NDE Reexamination Locations and Intervals for Grade 91 Piping System Girth Welds
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Topics: Nondestructive evaluation, Optimization, Piping systems, Welded joints, Stress, Creep, Fracture (Materials), Pipes, American Petroleum Institute, Rupture
Proceedings Papers

Creep Life Evaluations of ASME B31.1 Allowance for Variation From Normal Operation

Marvin J. Cohn
Proc. ASME. PVP2014, Volume 6A: Materials and Fabrication, V06AT06A065, July 20–24, 2014
Publisher: American Society of Mechanical Engineers
Paper No: PVP2014-28468
https://doi.org/10.1115/PVP2014-28468
View Paper titled, Creep Life Evaluations of ASME B31.1 Allowance for Variation From Normal Operation
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Topics: Clearances (Engineering), Creep, Damage, Stress, Base metals, Rupture, ASTM International, Design, Operating temperature, Pipes
Proceedings Papers

Frequency Distribution Curves for Main Steam Piping Multiaxial Stresses

Marvin J. Cohn, Fatma G. Faham, Dipak Patel
Proc. ASME. PVP2014, Volume 6A: Materials and Fabrication, V06AT06A066, July 20–24, 2014
Publisher: American Society of Mechanical Engineers
Paper No: PVP2014-28471
https://doi.org/10.1115/PVP2014-28471
View Paper titled, Frequency Distribution Curves for Main Steam Piping Multiaxial Stresses
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Topics: Pipes, Steam, Stress, Piping systems, Creep, American Petroleum Institute, Damage, Welded joints, Failure, Hoop stress
Proceedings Papers

Asset Integrity Management of High Pressure Piping Systems Subject to Creep

Marvin J. Cohn
Proc. ASME. PVP2013, Volume 6A: Materials and Fabrication, V06AT06A073, July 14–18, 2013
Publisher: American Society of Mechanical Engineers
Paper No: PVP2013-97524
https://doi.org/10.1115/PVP2013-97524
View Paper titled, Asset Integrity Management of High Pressure Piping Systems Subject to Creep
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Topics: Creep, High pressure (Physics), Piping systems, Design, Stress, Maintenance, Construction, Damage, Manufacturing, Power Piping Code
Proceedings Papers

Fitness for Service of Degraded Grade 91 Pipe

Marvin J. Cohn, Steve R. Paterson
Proc. ASME. PVP2012, Volume 6: Materials and Fabrication, Parts A and B, 669-675, July 15–19, 2012
Publisher: American Society of Mechanical Engineers
Paper No: PVP2012-78589
https://doi.org/10.1115/PVP2012-78589
View Paper titled, Fitness for Service of Degraded Grade 91 Pipe
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Topics: Fitness-for-service, Pipes