NDLI: A More Accurate and Precise Method for Large Metal Loss Corrosion Assessment

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Volume 1: Pipeline and Facilities Integrity

Modeling Pipeline Metal Loss Defects at Tool Speed

Failure Assessment of the Gas Pipeline by Considering the Geometric Constraint Effect

Identifying Stress Concentrations on Buried Steel Pipelines Using Large Standoff Magnetometry Technology

Directional Caliper Tool Development

Validate Crack Assessment Models With In-Service and Hydrotest Failures

Non-Contact Geomagnetic Localization of Pipeline Defects Using Empirical Mode Decomposition and Magnetic Gradient Tensor

Evaluation of Corrosion Growth Prediction Methodologies Using Burst Pressure Comparisons From Repeated In-Line Inspections

An Investigation Into the Benefits of Employing Multiple Assessments Methods for High Risk Pipelines

EMAT As a Basis for a Comprehensive System Wide Crack Management Program

Structure Assessment Using Instrumented Indentation: Strength, Toughness and Residual Stress

Operational Experiences With Axial Strain Inline Inspection Tools

Do You Have Wrinkles? A Strain- and Stress-Based Approach for the Assessment of Wrinkles Reported by In-Line Inspection

In-Line Inspection in Lieu of Hydrostatic Testing for Low Frequency Electric Resistance Welded Pipe

Implementation of a New Tool for Pipelines Integrity Evaluation: A Correlation Between Local Strains and Hardness

A Sensitivity Study: Effects of Toughness Values on Fatigue Crack Growth Analysis of Just-Survived Flaws Following a Pressure Test

Exceeding Limitations: Ultrasonic Crack Inspections Become Feasible for Liquid Natural Gases

Breathing New Life to Aging Pipeline Infrastructure Using Unique Wireline Inspection Techniques and Pipe-Lining Technology

Achieving North American Record for Longest Intelligent Inspection of a Natural Gas Pipeline

Development of Pinhole Corrosion Management Using MFL

Understanding Quantitative Performance of Large Standoff Magnetometry in Detecting Live Gas Pipeline Anomalies With Stress Estimation

The Future of In-Line Inspection: Free-Floating Smart Sensors

Validation of Computed Tomography Technology for Pipeline Inspection

Criticality Level Assessment From ILI Data

A Case Study on Potential SCC Management Using 10-Inch EMAT ILI

An Investigation on Microstructural Evolution of X70 Steel Pipe During Hot Induction Bending

Corrosion Growth Modeling by Learning a Dynamic Bayesian Network From Multiple In-Line Inspection Data

Adaptive Ultrasonic Imaging of Electric Resistance Welded Pipeline Seams

Interaction Rule Guidance for Corrosion Features Reported by ILI

An Investigation of the Load Carrying Capacity of Pipelines Under Accidental and Longitudinal Moving (Sliding) Loads

Fitness for Service Analysis of the Circumferential Extent of Corrosion in Pipelines

Application of Wide-Band Ultrasound for the Detection of Angled Crack Features in Oil and Gas Pipelines

Calibration of a Nondestructive Toughness Tester (NDTT) for Measuring Fracture Toughness of Pipeline Steel

Understanding Pipeline Strain Conditions: Case Studies Between ILI Axial and ILI Bending Measurement Techniques

Using Finite Element Analysis to Prioritize ILI Calls for Combined Features: Dents in Bends

Ultrasonic NDE Technology Comparison for Measurement of Long Seam Weld Anomalies in Low Frequency Electric Resistance Welded Pipe

Vibration and Fatigue Failures at Pipeline Facilities

Microwave Sensor Array for Corrosion Prediction in Steel Tank Bottoms

Risk-Based Integrity Decision Making for Lateral Piping

Advanced EMAT Crack Tool for Unpiggable Pipelines

Remaining Strength in Pressure Vessels With Pitting Type Metal Loss: Part 1

Root Cause Analysis of an Above-Ground Pipeline With Stress Corrosion Cracking

Condition Assessment for Optimizing Gasunie’s Network Improvement Program (GNIP)

Evaluation of Burst Pressure of Corroded Pipe Segments Using Three-Dimensional Finite Element Analyses

An Approach to Engineering Critical Assessment of Assets That Cannot Be Inline Inspected

Reactivating a Legacy Pipeline: Simulating ILI Run Behavior, Operation Optimization, and Project Challenges

Uncertainty Quantification of Nondestructive Techniques to Verify Pipeline Material Strength

An Analysis Model and its Practical Applications in PG&E Gas Transmission Pipeline Strength Test Projects

Pipeline Data Analytics: Enhanced Corrosion Growth Assessment Through Machine Learning

Do We Need a Safe Excavation Pressure for Dented Pipelines: How Should it Be Defined?

Analysis of the National Energy Board Pipeline Integrity Performance Measures Data

A Method to Analyze the Impact of Inline Inspection Accuracy on Integrity Management Program Planning of Pipelines

Overcoming Difficult to Inspect Multi-Diameter, Low Pressure Gas Transmission Pipeline Challenges

An ILI Based Program That Prevents Reoccurrence of Post ILI Failures Seen in Industry

Development of an Industry Test Facility and Qualification Process for ILI Technology Evaluation and Enhancements: Performance Evaluation Phase

Colonial Scout: A Powerful Web Map Solution Designed As the Data Messenger for Colonial Pipeline Company

Liquid Pipeline Location Specific Cyclic Pressure Determination

Threshold Geometrical Dimensions of Stage II Cracks Versus Required Resolution of Crack-Detection Techniques

Integration of Data From Multiple In-Line Inspection Systems to Improve Crack Detection and Characterization

A More Accurate and Precise Method for Large Metal Loss Corrosion Assessment

An Authoritative Comparison of Remaining Life Assessments for Pipeline Dents

Assessment of Pipeline Spiral Weld Cracks Subjected to Internal Pressure

Development and Experiences of a Circumferential Stress Corrosion Crack Management Program

Differences in Near-Neutral pH Crack Growth Behavior Between Oil Pipelines and Gas Pipelines and Corresponding Crack Growth Mitigation Strategies

High pH Crack Growth Sensitivity to Underload-Type of Pressure Fluctuations

Study on Transition of Stress Corrosion Cracking to Sharp Edge Corrosion for a Liquids Pipeline

Experimental-Numerical Assessment of Vintage Pipe and Girth Weld With a Geometrically Complex Corrosion Feature

Algorithms for the Strain Based Analysis of Dented Pipelines

Evaluation of the Fatigue Crack Growth Behavior by Experiments and Numerical Simulations on Full-Size Pipeline Steels

Some Factors Affecting Initiation of Stress Corrosion Cracking of an X80 Pipe Steel in Near-Neutral pH Environment

Complex Circumferential Stress Corrosion Cracking: Identification, Sizing and Consequences for the Integrity Management Program

Crack Shape Development for Leak-Before-Break Analysis in Pipelines

Implementation of Reliability-Based Criteria for Corrosion Assessment

Study of Safe Dig Pressure Level for Rock Dents in Gas Pipelines

Improving the Accuracy of Traditional Dent Fatigue Analysis: A Method for Quantifying the Initial Damage Caused by Dent Formation

Evaluation of Crack Growth and Material Toughness Effects on Probability of Pipeline Failure

Influence of Mean Load Pressure Fluctuations on Crack Growth Behavior in Steel Pipelines

Fracture Toughness Testing and its Implications to Engineering Fracture Mechanics Analysis of Energy Pipelines

Determining Pipeline Depth of Cover at River Crossings by Data Integration

Buried Pipe Span Ovality Assessment

Effect of Residual Stress or Plastic Deformation History on Fatigue Life Simulation of Pipeline Dents

Volume 2: Pipeline Safety Management Systems; Project Management, Design, Construction, and Environmental Issues; Strain Based Design; Risk and Reliability; Northern Offshore and Production Pipelines

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

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A More Accurate and Precise Method for Large Metal Loss Corrosion Assessment

Content Provider	The American Society of Mechanical Engineers (ASME) Digital Collection
Author	Zhang, Shenwei Yan, Jason Kariyawasam, Shahani Huang, Terry Al-Amin, Mohammad
Copyright Year	2018
Abstract	Pipeline integrity decisions are highly sensitive to the assessment model. A less accurate and less precise model can conservatively trigger many unnecessary actions such as excavations without providing additional safety. Therefore, a more accurate and precise model will reduce excavations and provide higher assurance of safety. This is akin to using a more precise surgical tool such as a laser for cutting out a brain tumor where you can cut closer to the edge and be assured of cutting out more of the tumor (safer) and yet cut less of the surrounding brain tissue (less conservative). This paper presents a novel model for assessing large metal-loss corrosion based on in-line inspection (ILI) or field measurement. The model described in this paper utilized an unconventional approach, namely multiple plausible profiles (P2), to idealize the shape of the corrosion, and therefore is referred to as P2 model. In contrast, all existing models use one single profile for characterizing corrosion profile, e.g. RSTRENG utilizes a single worst-case river bottom profile to characterize the shape of corrosion. The P2 model has been initially validated using fourteen (14) full scale specimen-based hydrostatic tests on pipes containing real large corrosion features. Validation results showed that the P2 model is safe, but less conservative and more precise than RSTRENG. The magnitude of reduction in conservatism depends on the corrosion morphology. On average, the P2 model achieves 15% reduction in model bias and 44% reduction in standard deviation of model error. Further validation was provided using the testing data published by PRCI and PETROBRAS. Another set of burst tests are being conducted by TransCanada as part of the continuous validation of P2 model. The effectiveness of the P2 model was demonstrated through two case studies (denoted by Case study 1 and 2). Case Study 1 included 170 external metal-loss corrosion features that were excavated from different pipeline sections, and have field-measurements using laser scan tool. Case Study 2 included 154 ILI-reported external metal-loss corrosion features with RSTRENG calculated rupture-pressure-ratio (RPR) of less than or equal to 1.25 (i.e. RPR ≤ 1.25); hence, these features were classified as immediate features. The Case Studies showed that the use of the P2 model resulted in 80% less number of ILI-reported features requiring immediate action (i.e., RPR ≤ 1.25) and 89% less number of excavated features requiring repair (e.g., sleeve or cut-out) compared to the respective number of features identified by RSTRENG-based assessment. The reduction in the number of features requiring excavation or repair is highly morphology-dependent with the highest reduction achievable for pipeline containing long and wide corrosion clusters (e.g., tape-coated pipeline). However, the P2 model is applicable to all clusters regardless of the number of individual corrosion anomalies associated with the cluster.
Sponsorship	Pipeline Division
File Format	PDF
ISBN	9780791851869
DOI	10.1115/IPC2018-78233
Volume Number	Volume 1: Pipeline and Facilities Integrity
Conference Proceedings	2018 12th International Pipeline Conference
Language	English
Publisher Date	2018-09-24
Publisher Place	Calgary, Alberta, Canada
Access Restriction	Subscribed
Subject Keyword	Brain Pipelines Biological tissues Metals Rupture Inspection Maintenance Rivers Pressure Cutting Errors Surgical tools Corrosion Lasers Hydrostatic testing Safety Shapes Pipes Pipeline integrity Tumors Testing
Content Type	Text
Resource Type	Article

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