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Christoph Kalwa
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Proceedings Papers

Safety Considerations for the Transport of Hydrogen Gas in Line Pipes and Induction Bent Pipes

Georgi Genchev, Juliane Mentz, Holger Brauer, Christoph Kalwa, Elke Muthmann, Daniel Ratke
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, V001T08A004, September 26–30, 2022
Paper No: IPC2022-86888
https://doi.org/10.1115/IPC2022-86888
View Paper titled, Safety Considerations for the Transport of Hydrogen Gas in Line Pipes and Induction Bent Pipes
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Topics: Ductility, Electromagnetic induction, Fracture toughness, Hydrogen, Pipes, Safety
Proceedings Papers

Integrity of Longitudinal Welds in Pipelines: Bridging Scales

Marion Erdelen-Peppler, Christoph Kalwa, Jens Schröder
Proc. ASME. IPC2018, Volume 3: Operations, Monitoring, and Maintenance; Materials and Joining, V003T05A038, September 24–28, 2018
Paper No: IPC2018-78504
https://doi.org/10.1115/IPC2018-78504
View Paper titled, Integrity of Longitudinal Welds in Pipelines: Bridging Scales
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Topics: Pipelines, Welded joints, Fracture toughness, Pipes, Pressure, Testing, Containment, Displacement, Finite element analysis, Fracture (Materials)
Proceedings Papers

Influence of Material Heterogeneity on the Strain Capacity of Pipelines

Susanne Höhler, Andreas Mondry, Christoph Kalwa, Kaveh Samadian, Wim De Waele, Stijn Hertelé
Proc. ASME. IPC2018, Volume 2: Pipeline Safety Management Systems; Project Management, Design, Construction, and Environmental Issues; Strain Based Design; Risk and Reliability; Northern Offshore and Production Pipelines, V002T06A004, September 24–28, 2018
Paper No: IPC2018-78397
https://doi.org/10.1115/IPC2018-78397
View Paper titled, Influence of Material Heterogeneity on the Strain Capacity of Pipelines
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Topics: Pipelines, Pipes, Deformation, Design, Collapse, Electromagnetic scattering, Materials properties, Mechanical properties, Pressure, Simulation
Proceedings Papers

Understanding Inverse Fracture: A Comparison of Results of Drop Weight Tear Tests and Partial Gas Tests

Marion Erdelen-Peppler, Christoph Kalwa, Alexander Völling
Proc. ASME. IPC2018, Volume 3: Operations, Monitoring, and Maintenance; Materials and Joining, V003T05A012, September 24–28, 2018
Paper No: IPC2018-78686
https://doi.org/10.1115/IPC2018-78686
View Paper titled, Understanding Inverse Fracture: A Comparison of Results of Drop Weight Tear Tests and Partial Gas Tests
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Topics: Fracture (Materials), Weight (Mass), Fracture (Process), Discrete wavelet transforms, Brittleness, Pipes, Deflection, Deformation, Fracture toughness, Materials properties
Proceedings Papers

Strain Capacity of Large Diameter Pipes: Full Scale Investigation With Influence of Girth Weld, Strip End Weld and Ageing Effects

Susanne Höhler, Hossein Karbasian, Alexander Gering, Christoph Kalwa, Brahim Ouaissa
Proc. ASME. IPC2016, Volume 2: Pipeline Safety Management Systems; Project Management, Design, Construction and Environmental Issues; Strain Based Design; Risk and Reliability; Northern Offshore and Production Pipelines, V002T06A002, September 26–30, 2016
Paper No: IPC2016-64151
https://doi.org/10.1115/IPC2016-64151
View Paper titled, Strain Capacity of Large Diameter Pipes: Full Scale Investigation With Influence of Girth Weld, Strip End Weld and Ageing Effects
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Topics: Pipes, Strips, Pressure, Design, Pipe joints, Pipelines, Stress, Buckling, Coating processes, Deformation
Proceedings Papers

Anisotropic Material Characterization and its Effect on Structural Integrity

Oliver Hilgert, Christoph Kalwa
Proc. ASME. IPC2016, Volume 3: Operations, Monitoring and Maintenance; Materials and Joining, V003T05A021, September 26–30, 2016
Paper No: IPC2016-64147
https://doi.org/10.1115/IPC2016-64147
View Paper titled, Anisotropic Material Characterization and its Effect on Structural Integrity
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Topics: Anisotropy, Yield strength, Pressure, Stress, Buckling, Collapse, Pipes, Bearings, Design, External pressure
Proceedings Papers

Inverse Fracture: What is it All About?

Andre Hasenhütl, Marion Erdelen-Peppler, Christoph Kalwa
Proc. ASME. IPC2014, Volume 3: Materials and Joining; Risk and Reliability, V003T07A017, September 29–October 3, 2014
Paper No: IPC2014-33476
https://doi.org/10.1115/IPC2014-33476
View Paper titled, Inverse Fracture: What is it All About?
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Topics: Fracture (Materials), Brittleness, Pipes, Testing, Ductile fracture, Fatigue, Materials properties, Phase transition temperature, Pipelines, Shear (Mechanics)
Proceedings Papers

The Misconception of Employing CVN Toughness as Key-Measure in Ductile Crack Arrest Prediction for Modern Line-Pipe Steels

Alexander Völling, Christoph Kalwa, Marion Erdelen-Peppler
Proc. ASME. IPC2014, Volume 3: Materials and Joining; Risk and Reliability, V003T07A016, September 29–October 3, 2014
Paper No: IPC2014-33457
https://doi.org/10.1115/IPC2014-33457
View Paper titled, The Misconception of Employing CVN Toughness as Key-Measure in Ductile Crack Arrest Prediction for Modern Line-Pipe Steels
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Topics: Ductile fracture, Fracture toughness, Pipes, Steel, Calibration, Databases, Fracture (Materials), Reliability, Crack propagation, Deformation
Proceedings Papers

Simulation of Ductile Crack Propagation in High-Strength Pipeline Steel Using Damage Models

Aida Nonn, Christoph Kalwa
Proc. ASME. IPC2012, Volume 3: Materials and Joining, 597-603, September 24–28, 2012
Paper No: IPC2012-90653
https://doi.org/10.1115/IPC2012-90653
View Paper titled, Simulation of Ductile Crack Propagation in High-Strength Pipeline Steel Using Damage Models
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Topics: Damage, Ductile fracture, Pipelines, Simulation, Steel, Fracture (Materials), Fracture (Process), Design, Failure, High strength steel
Proceedings Papers

Crack Arrest Testing of High Strength Steels

Andre Hasenhütl, Marion Erdelen-Peppler, Christoph Kalwa, Martin Pant, Andreas Liessem
Proc. ASME. IPC2012, Volume 3: Materials and Joining, 113-120, September 24–28, 2012
Paper No: IPC2012-90120
https://doi.org/10.1115/IPC2012-90120
View Paper titled, Crack Arrest Testing of High Strength Steels
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Topics: Fracture (Materials), High strength steel, Testing, Fracture (Process), Fracture toughness, Pipes, Ductile fracture, Notch testing, Steel, Brittle fracture
Proceedings Papers

Development of Grade X70 and X80 for Sour Service Line Pipe Applications

Thorsten Staudt, Volker Schwinn, Sven Raedersdorf, Martin Pant, Christoph Kalwa, Heiko Haverkamp, Christian Coppey
Proc. ASME. IPC2012, Volume 3: Materials and Joining, 355-360, September 24–28, 2012
Paper No: IPC2012-90391
https://doi.org/10.1115/IPC2012-90391
View Paper titled, Development of Grade X70 and X80 for Sour Service Line Pipe Applications
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Topics: Pipes, American Petroleum Institute, Steel, Cracking (Materials), Fracture (Process), Hydrogen, Quality control
Proceedings Papers

Anisotropy: Benefits for UOE Line Pipe

Oliver Hilgert, Steffen Zimmermann, Christoph Kalwa
Proc. ASME. IPC2012, Volume 4: Pipelining in Northern and Offshore Environments; Strain-Based Design; Risk and Reliability; Standards and Regulations, 161-170, September 24–28, 2012
Paper No: IPC2012-90063
https://doi.org/10.1115/IPC2012-90063
View Paper titled, Anisotropy: Benefits for UOE Line Pipe
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Topics: Anisotropy, Design, Pipes, Pressure, Stress
Proceedings Papers

Numerical Modeling of Plastic Deformations in UOE Line Pipe

Oliver Hilgert, Susanne Ho¨hler, Steffen Zimmermann, Christoph Kalwa
Proc. ASME. IPC2010, 2010 8th International Pipeline Conference, Volume 4, 375-383, September 27–October 1, 2010
Paper No: IPC2010-31663
https://doi.org/10.1115/IPC2010-31663
View Paper titled, Numerical Modeling of Plastic Deformations in UOE Line Pipe
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Topics: Anisotropy, Computer simulation, Deformation, Design, Finite element analysis, Pipes, Stress, Pressure, Containment, Hardening
Proceedings Papers

Corrosion Assessment Method Validation for High-Grade Line Pipe

Michael Besel, Steffen Zimmermann, Christoph Kalwa, Theo Ko¨ppe, Andreas Liessem
Proc. ASME. IPC2010, 2010 8th International Pipeline Conference, Volume 4, 385-394, September 27–October 1, 2010
Paper No: IPC2010-31664
https://doi.org/10.1115/IPC2010-31664
View Paper titled, Corrosion Assessment Method Validation for High-Grade Line Pipe
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Topics: Corrosion, Finite element analysis, Pipes