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Proceedings Papers

An Integrated Model for Predicting Stress Corrosion Cracking of Buried Pipelines

Guanlan Liu, Francois Ayello, Gary Vervake, Justin Beck, Ramgopal Thodla, Narasi Sridhar
Proc. ASME. IPC2022, Volume 1: Pipeline Safety Management Systems; Project Management, Design, Construction, and Environmental Issues; Strain-Based Design and Assessment; Risk and Reliability; Emerging Fuels and Greenhouse Gas Emissions, V001T07A012, September 26–30, 2022
Paper No: IPC2022-87136
DOI: https://doi.org/10.1115/IPC2022-87136
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Topics: Pipelines, Stress corrosion cracking
Proceedings Papers

Fracture Toughness Behavior of Carbon Steels in Mildly Sour Waters

Brandon C. Rollins, Oliver J. Tarbard, Kenneth E. Bagnoli, Ramgopal Thodla
Proc. ASME. PVP2021, Volume 4: Materials and Fabrication, V004T06A037, July 13–15, 2021
Paper No: PVP2021-63030
DOI: https://doi.org/10.1115/PVP2021-63030
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Topics: Carbon steel, Cracking (Materials), Fitness-for-service, Fracture (Process), Fracture toughness, Hydrogen, Mechanical properties, Stress, Water
Proceedings Papers

Fatigue Crack Growth Study of X70 Line Pipe Steel in Hydrogen Containing Natural Gas Blends

Ashwini Chandra, Ramgopal Thodla, Thomas Joseph Prewitt, Wendy Matthews, Siari Sosa
Proc. ASME. PVP2021, Volume 4: Materials and Fabrication, V004T06A050, July 13–15, 2021
Paper No: PVP2021-61821
DOI: https://doi.org/10.1115/PVP2021-61821
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Topics: Fatigue cracks, Hydrogen, Hydrogen embrittlement, Natural gas, Pipes, Steel
Proceedings Papers

Hydrogen Embrittlement Evaluation of Different Heats of AISI 8630 Steel in Subsea Applications

Xiaoji Li, Ramgopal Thodla, Fabio Alves, Mario Castro, Anand Venkatesh
Proc. ASME. PVP2020, Volume 5: High Pressure Technology, V005T05A008, August 3, 2020
Paper No: PVP2020-21478
DOI: https://doi.org/10.1115/PVP2020-21478
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Topics: Displacement, Fracture toughness, Hydrogen embrittlement, Ocean engineering, Steel
Journal Articles

Development of a Novel Test Method to Characterize Material Properties in Corrosive Environments for Subsea HPHT Design

Ramgopal Thodla, Colum Holtam, Rajil Saraswat
Journal: Journal of Pressure Vessel Technology
Article Type: Research-Article
J. Pressure Vessel Technol. June 2020, 142(3): 031401.
Paper No: PVT-18-1037
DOI: https://doi.org/10.1115/1.4043512
Published Online: December 11, 2019
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Topics: Fracture (Materials), Ocean engineering, Design, Seawater
Proceedings Papers

A Modified Engineering Critical Assessment Approach for Offshore Pipelines

Colum Holtam, Rajil Saraswat, Ramgopal Thodla, Feng Gui
Proc. ASME. OMAE2018, Volume 4: Materials Technology, V004T03A011, June 17–22, 2018
Paper No: OMAE2018-77952
DOI: https://doi.org/10.1115/OMAE2018-77952
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Topics: Underwater pipelines, Fracture (Materials), Stress, Buckling, Cycles, Fatigue cracks, Fracture mechanics, Low cycle fatigue, Pipelines, Pipes
Proceedings Papers

Fracture Mechanics Analysis of Clad Subsea Equipment in Sour HPHT Conditions

Colum Holtam, Rajil Saraswat, Ramgopal Thodla
Proc. ASME. PVP2017, Volume 5: High-Pressure Technology; ASME Nondestructive Evaluation, Diagnosis and Prognosis Division (NDPD); SPC Track for Senate, V005T05A013, July 16–20, 2017
Paper No: PVP2017-65770
DOI: https://doi.org/10.1115/PVP2017-65770
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Topics: Fracture mechanics, Ocean engineering, Finite element analysis, American Petroleum Institute, Design, Fatigue, Fracture (Materials), Alloy steel, Alloys, Failure
Proceedings Papers

Development of a Novel Test Method to Characterize Material Properties in Corrosive Environments for Subsea HPHT Design

Ramgopal Thodla, Colum Holtam, Rajil Saraswat
Proc. ASME. PVP2017, Volume 5: High-Pressure Technology; ASME Nondestructive Evaluation, Diagnosis and Prognosis Division (NDPD); SPC Track for Senate, V005T05A005, July 16–20, 2017
Paper No: PVP2017-65772
DOI: https://doi.org/10.1115/PVP2017-65772
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Topics: Design, Materials properties, Ocean engineering, Fracture (Materials), Fracture mechanics, Cathodic protection, Fatigue, Fracture toughness, Seawater, Stress
Proceedings Papers

Fatigue Crack Growth Behavior of Embedded Flaws in Sour Pipelines

Feng Gui, Colum Holtam, Brandon Gerst, Ramgopal Thodla
Proc. ASME. OMAE2016, Volume 4: Materials Technology, V004T03A022, June 19–24, 2016
Paper No: OMAE2016-54384
DOI: https://doi.org/10.1115/OMAE2016-54384
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Topics: Fatigue cracks, Pipelines, Hydrogen, Steel, Fracture (Materials), Corrosion, Fatigue, Fracture mechanics, Absorption, American Petroleum Institute
Proceedings Papers

Effect of Sour Acidizing Treatments on the Fatigue Crack Growth and Fracture Toughness Behavior of C-Mn Line Pipe Steels

Weiwei Yu, Jonathan Bowman, Apurva Batra, Ramgopal Thodla, Colum Holtam, Brandon Gerst
Proc. ASME. OMAE2016, Volume 4: Materials Technology, V004T03A025, June 19–24, 2016
Paper No: OMAE2016-54388
DOI: https://doi.org/10.1115/OMAE2016-54388
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Topics: Fatigue cracks, Fracture toughness, Pipes, Steel, Fatigue, Corrosion, Fracture (Materials), Fracture (Process), Hydrogen, Pressure
Proceedings Papers

Effect of Acidizing Treatments on the Fatigue Crack Growth Behavior of C-Mn Line Pipe Steels

Apurva Batra, Jonathan Bowman, Weiwei Yu, Ramgopal Thodla, Colum Holtam, Brandon Gerst
Proc. ASME. OMAE2016, Volume 4: Materials Technology, V004T03A023, June 19–24, 2016
Paper No: OMAE2016-54385
DOI: https://doi.org/10.1115/OMAE2016-54385
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Topics: Fatigue cracks, Pipes, Steel, Corrosion, Temperature, Fracture (Materials), Fatigue, Heat, Tension
Proceedings Papers

Effect of Reeling and pH on the Fatigue Crack Growth Behavior of C-Mn Line Pipe Steels Exposed to Acidizing Environments

Apurva Batra, Jonathan Bowman, Weiwei Yu, Ramgopal Thodla, Colum Holtam, Brandon Gerst
Proc. ASME. OMAE2016, Volume 4: Materials Technology, V004T03A024, June 19–24, 2016
Paper No: OMAE2016-54386
DOI: https://doi.org/10.1115/OMAE2016-54386
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Topics: Fatigue cracks, Pipes, Steel, Corrosion, Welded joints, Cycles, Fracture (Materials), Temperature, Fatigue, Heat
Journal Articles

Effect of Reeling on Sour Service Fatigue Crack Growth Behavior of Welded API5LX65 Line Pipe

Ramgopal Thodla, J. R. Gordon, Feng Gui
Journal: Journal of Pressure Vessel Technology
Article Type: Research-Article
J. Pressure Vessel Technol. April 2016, 138(2): 021405.
Paper No: PVT-15-1028
DOI: https://doi.org/10.1115/1.4031165
Published Online: November 18, 2015
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Topics: Fatigue cracks, Fracture (Materials), Hydrogen, Pipes, Fatigue
Proceedings Papers

Effect of Reeling on Fatigue Crack Growth Behavior of Welded API5LX65 Line Pipe

Ramgopal Thodla, Robin Gordon, Feng Gui
Proc. ASME. OMAE2015, Volume 4: Materials Technology, V004T03A007, May 31–June 5, 2015
Paper No: OMAE2015-42412
DOI: https://doi.org/10.1115/OMAE2015-42412
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Topics: Fatigue cracks, Pipes, Fatigue, Heat, Hydrogen, Pipeline risers, Risers (Casting), Welded joints
Proceedings Papers

Effect of Reeling on Fracture Toughness Behavior of Welded API 5 LX6 5 Line Pipe

Ramgopal Thodla, Robin Gordon, Feng Gui
Proc. ASME. OMAE2015, Volume 4: Materials Technology, V004T03A004, May 31–June 5, 2015
Paper No: OMAE2015-42413
DOI: https://doi.org/10.1115/OMAE2015-42413
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Topics: American Petroleum Institute, Fracture toughness, Pipes, Cycles, Heat, Welded joints
Proceedings Papers

Fatigue Crack Growth Rate of Reeled Pipe in Sour Environments

Javad Safari, Ramgopal Thodla, Ian Merchant, John Hamilton
Proc. ASME. OMAE2015, Volume 4: Materials Technology, V004T03A001, May 31–June 5, 2015
Paper No: OMAE2015-41028
DOI: https://doi.org/10.1115/OMAE2015-41028
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Topics: Fatigue cracks, Pipes, Cycles, Diffusion (Physics), Heat, Hydrogen, Steel catenary risers, Stress, Wave motion, Welded joints
Proceedings Papers

Effect of Reeling on Sulfide Stress Corrosion Cracking of Welded API5LX65 Line Pipe

Ramgopal Thodla, Robin Gordon, Feng Gui
Proc. ASME. OMAE2015, Volume 4: Materials Technology, V004T03A008, May 31–June 5, 2015
Paper No: OMAE2015-42414
DOI: https://doi.org/10.1115/OMAE2015-42414
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Topics: Pipes, Stress corrosion cracking, Cracking (Materials), Fracture (Process), Welded joints, Fitness-for-service, Microhardness, Stress
Proceedings Papers

Engineering Critical Assessment in Sour Service by Fracture and Fatigue Small Scale Sour Testing

Jun Nakamura, Nobuyuki Hisamune, Tetsuya Fukuba, Colin Stuart Scott, Ramgopal Thodla, Feng Gui
Proc. ASME. OMAE2013, Volume 4A: Pipeline and Riser Technology, V04AT04A043, June 9–14, 2013
Paper No: OMAE2013-10574
DOI: https://doi.org/10.1115/OMAE2013-10574
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Topics: Fatigue, Fracture (Materials), Fracture (Process), Testing, Fracture toughness, Transients (Dynamics), Ocean engineering, Pipeline risers, Pipelines, Risers (Casting)
Proceedings Papers

Fatigue Crack Growth Rate and Fracture Toughness of API5L X65 in Sweet Environments

Michael A. Tognarelli, Ramgopal Thodla, Steven Shademan
Proc. ASME. OMAE2013, Volume 3: Materials Technology; Ocean Space Utilization, V003T03A006, June 9–14, 2013
Paper No: OMAE2013-10216
DOI: https://doi.org/10.1115/OMAE2013-10216
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Topics: Fatigue cracks, Fracture toughness, Pipes, Corrosion, Displacement, Fatigue, Heat, Hydrogen, Stress
Proceedings Papers

Fatigue Crack Growth Rate and Fracture Toughness of Non-Sour Service Grade X65 and X80 in Sour Environments

Jun Nakamura, Nobuyuki Hisamune, Tetsuya Fukuba, Ramgopal Thodla, Colin Stuart Scott, Feng Gui
Proc. ASME. OMAE2013, Volume 3: Materials Technology; Ocean Space Utilization, V003T03A020, June 9–14, 2013
Paper No: OMAE2013-10573
DOI: https://doi.org/10.1115/OMAE2013-10573
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Topics: Fatigue cracks, Fracture toughness, Hydrogen, Transients (Dynamics), Fatigue, Flow (Dynamics), Fracture (Materials), Fracture (Process), Ocean engineering, Pipeline risers