NDLI: Girth Welds Integrity Evaluation on a Vintage Gas Pipeline

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Volume 3: Operations, Monitoring and Maintenance; Materials and Joining

Volume 1: Pipelines and Facilities Integrity

Failure Along Spiral Welds in Gas Pipeline

Numerical Simulations of Burst of Corroded Pipes With Thermally Induced Compressive Axial Strain

Formulation and Experimental Validation of a New Erosion Flow Model

Applying Corrosion Growth Rates Derived From Repeat ILI Runs to Predict Future Severity

Effect of Crack Depth on Burst Strength of X70 Linepipe With Dent-Crack Defect

Relative Statistical Calibration of ILI Measurements

Assessment of In-Line Inspection Performance and Interpretation of Field Measurements for Characterization of Complex Dents

Findings From an Investigation of Hydrotest Protocols

Experimental Validation of a Finite-Element Model to Simulate an Impact on Pipeline due to Vehicles or Heavy Object Fall

The Development and Use of an Absolute Depth Size Specification in ILI-Based Crack Integrity Management of Pipelines

New Classification Approach for Dents With Metal Loss and Corrosion Along the Seam Weld

Thermal Response of Gas Pipeline Metal to Gas Decompression

Assessing the Benefits of Hydrotests for Pipelines With SCC History Post-Crack Detection ILI Runs

Probabilistic Assessment of Crack Detection ILI Effectiveness for Managing Stress Corrosion Cracking on Buried Pipelines

Susceptibility of Stress Corrosion Cracking in Liquid and Gas Pipelines: A Saudi Aramco Study Using Statistical Approaches

De Facto Hydrostatic Test Pressures: A Study in Double Stroking

Failure Pressure Ratios and Implied Reliability Levels for Corrosion Anomalies on Gas Transmission Pipelines

Pipeline Operator Perspective in Use of Hydrostatic Testing as an Integrity Management Tool

Material Properties and Flaw Characteristics of Vintage Girth Welds

Corrosion Growth and Remnant Life Assessment: How to Pick the Right Approach for Your Pipeline

Non-Linear Corrosion Growth: A More Appropriate and Accurate Model for Predicting Corrosion Growth Rate

Full-Scale Stress Corrosion Crack Growth Testing of an X70 Spiral-Welded Pipe in Near-Neutral pH Soil Environment

Probability-Based Sentencing Criteria for Volumetric In-Line Inspection Data

A Life-Cycle Approach to the Assessment of Pipeline Dents

The Effects of Pressure Fluctuations on Hydrogen Embrittlement in Pipeline Steels

Improvement of Pipeline Fatigue Life Estimation

Evaluation of Fatigue in Gas Pipelines

Development and Implementation of a Risk Based Prioritization Methodology for MAOP Reconfirmation of Gas Transmission Facilities

Development of Key Performance Indicator for Management of Under Deposit Corrosion (UDC)

Integrity of Buried Gas Pipeline Subjected to an Adjacent Pipe Rupture Event

Analysis of Pressure Test Failure Performance for Vintage Pipe

ILI-to-Field Data Comparisons: What Accuracy Can You Expect?

ILI to ILI Comparisons: Quantifying the Impact of Multiple Inspections

Study of a Plastic Strain Limit Damage Criterion for Pipeline Mechanical Damage Using FEA and Full-Scale Denting Tests

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Making Integrity Decisions Using Metal Loss ILI Validation Process

A Study of Crack Interaction Criteria

Review of Engineering Fracture Mechanics Model for Pipeline Applications

Estimating J-R Curve From CVN Upper Shelf Energy and its Application

Integrity Assessment of Post-Peak-Moment Wrinkles

Finite Element Modeling and Quantification of Mechanical Damage Severity in Pipelines

A Review of Rules and Analysis Models for Interaction of LF-ERW Manufacturing Linear Features in Pipelines

Determining the Number of Excavations Required to Confirm the Presence or Absence of SCC on a Pipeline Following an SCCDA Process

Risk-Based Mitigation of Mechanical Damage

Reinforcement of Planar Defects in Low-Frequency ERW Long Seams Using Composite Reinforcing Materials

Full-Scale Elevated Temperature Testing of Composite Repairs in Bending and Compression

Finite Element Analysis of Composite Repairs With Full-Scale Validation Testing

Mitigation of Infilling Around Pipelines With Cyclic Lateral Deflections

Pipeline Failures Resulting From Interacting Integrity Threats

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Finite Element Analysis and Test Verification of Composite Repair Length on Corrosion Defects

Application of Load Sequence to Control Crack Growth in Steel Pipelines Under Near Neutral pH SCC

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Identification of Repair Coatings on Pipelines Using In-Line Inspection Technologies

Case Study on Management of a Pipeline Exhibiting Challenging Crack ILI Performance

A Finite Element Procedure to Model the Effect of Hydrostatic Testing on Subsequent Fatigue Crack Growth

Hydrostatic Pressure Testing as Part of an Integrity Management Program: A Case Study

A Study of Crack Detection Ultrasonic Attributes to Manage Leak Threats Associated With Short Crack-Like Flaws in ERW Pipelines

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The Benefits of Accurate ILI Performance on Pipeline Integrity Programs for Axial Crack and Metal Loss Corrosion Threats

Update of Understanding of Near-Neutral pH SCC Crack Growth Mechanisms and Development of Pipe-Online Software for Pipeline Integrity Management

The Use of Hydrotesting and EMAT Inline Inspection Technology for the Integrity Management of Stress Corrosion Cracking (SCC) in Gas Pipelines

Evaluating Pipeline Ovality Acceptability Criteria for Straight Pipe Sections

Development of the UKOPA Strategy for the Management of Ageing Pipelines

Experimental and Numerical Investigation Into the Behavior of Buried Steel Pipelines Under Strike-Slip Fault Movement

Review of Phase II for the Comprehensive Study to Understand Longitudinal ERW Seam Failures

Development Towards a Novel Approach for Assessment of Corroded Pipe

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Integrity Management of Ground Movement Hazards

Improved Pipeline Dent Integrity Management

Longitudinal Stress Limits in Managing Spans and Other Longitudinal Loads

Advanced Integrity Management Framework for Pipelines

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Girth Welds Integrity Evaluation on a Vintage Gas Pipeline

Content Provider	The American Society of Mechanical Engineers (ASME) Digital Collection
Author	Pedro, M. Hryciuk Jose, A. Minellono Domínguez, Verónica
Copyright Year	2016
Abstract	A leak on a girth weld was detected on a 609.6 mm (24 in) diameter transmission gas pipeline while recoating works were being performed. Failure analysis determined that the leak was caused by a pre-existing defect in the girth weld. This pre-existing defect had not been evolving over time. Nonetheless, because of the stress particular condition to which the gas pipeline was subject during the recoating work, the defect destabilized and progressed to failure. In order to reduce the risk of occurrence of similar failures, a total of 27,000 girth welds were individually analyzed, corresponding to a length of 191 kilometers (118 miles) of the same gas pipeline section. The analysis included evaluation of internal inspection runs and girth welds gammagraphs available from the recoating work. Hence, not only was the data analyzed individually, but a comparison of the different sources of information to find a correlation was also performed. Features detected in the analysis were classified and prioritized base on comparison with the failed girth weld defect. Also correspondence with crack like indications was considered. Severity of anomalies was categorized on four levels. A set of the highest severe crack like anomalies with potential failure were selected for direct assessment. The complete process involved the assessment of 399 anomalies in total, revealing cracks on 79 girth welds. Metal reinforcements were installed as permanent repair on 27 girth welds according to repair criteria, and direct assessment findings were used to correlate internal inspection signals with features. This paper discusses the results of the analysis, the field findings, and the actions taken.
Sponsorship	Pipeline Division
File Format	PDF
ISBN	9780791850251
DOI	10.1115/IPC2016-64587
Volume Number	Volume 1: Pipelines and Facilities Integrity
Conference Proceedings	2016 11th International Pipeline Conference
Language	English
Publisher Date	2016-09-26
Publisher Place	Calgary, Alberta, Canada
Access Restriction	Subscribed
Subject Keyword	Leakage Welded joints Pipelines Failure analysis Metals Inspection Risk Fracture (materials) Maintenance Signals Failure Stress
Content Type	Text
Resource Type	Article

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