Menu
Search
Filters
Close
Menu

51317--9510-Towards an Effective Corroded Pipelines Integrity Analysis

Picture for Towards an Effective Corroded Pipelines Integrity Analysis
Available for download

The focus herein is on comparing integrity probabilistic analysis approaches with a brief discussion on the existing deterministic approaches. The comparison study utilizes real life application of In-Line-Inspection (ILI) and field measurements of corroded onshore pipelines.

Product Number: 51317--9510-SG
ISBN: 9510 2017 CP
Author: Mona Abdolrazaghi
Publication Date: 2017
Industry: Pipelines, Tanks, and Underground Systems
$0.00
$20.00
$20.00

This paper is aiming at providing practical recommendations for effective and efficient integrity analyses of corroded onshore pipelines. The focus herein is on comparing integrity analysis approaches; namely deterministic safety factors calibrated safety factors and probabilistic analysis. The comparison study utilizes real life application of In-Line-Inspection (ILI) and field measurements of corroded onshore pipelines. The study addresses the advantages and disadvantages of each analysis approach emphasizing on the ability to capture measurements uncertainties and learnings from trending data properly. Such learnings can be addressed by a relative comparison of both ILI and field measurements (i.e. relative uncertainty measurements). Common practice showed that both measurements are contaminated with errors and/or biases. In this paper a new methodology for estimating ILI uncertainties based on minimizing the relative error between ILI and field measurements is presented. Deterministic codified safety factor approach is simply comparing the nominal burst pressure against the maximum operating pressure where some epistemic uncertainties may or may not be included. On the other hand safety factors can be calibrated to achieve a target reliability level while considering vendor claimed aleatory uncertainties. In reality the uncertainty of ILI measurements may be departure from vendors claim in terms of value and/or statistical properties. Therefore the calibrated safety factor may not be able to capture both aleatory and epistemic uncertainties under one umbrella. Recent advances in application of probabilistic approaches showed an added value for pipeline integrity programs along with it capability to address all types of uncertainties. The probabilistic or reliability-based approach has showed some superiority in this arena compared to deterministic integrity analysis approaches. In studying the three analysis approaches on onshore corroded pipelines operators would have the chance to assess the level of conservatism or non-conservatism in analyzing their corrosion integrity programs. This study presents how a full probabilistic analysis including the measurement uncertainty and calibrated corrosion ILI data can provide more effective and efficient estimation of the corrosion reliability measurements compared to traditional and recommended practice approaches.

Key words: uncertainty, measurement, calibration, In-line inspection (ILI), probabilistic, reliability, corrosion, probability of failure (PoF), failure pressure prediction (FFP), metal loss, integrity assessment, Ultra Sonic (UT) inspection, Magnetic Flux Leakage (MFL) inspection, Non-destructive examination (NDE) measurement

 

 

This paper is aiming at providing practical recommendations for effective and efficient integrity analyses of corroded onshore pipelines. The focus herein is on comparing integrity analysis approaches; namely deterministic safety factors calibrated safety factors and probabilistic analysis. The comparison study utilizes real life application of In-Line-Inspection (ILI) and field measurements of corroded onshore pipelines. The study addresses the advantages and disadvantages of each analysis approach emphasizing on the ability to capture measurements uncertainties and learnings from trending data properly. Such learnings can be addressed by a relative comparison of both ILI and field measurements (i.e. relative uncertainty measurements). Common practice showed that both measurements are contaminated with errors and/or biases. In this paper a new methodology for estimating ILI uncertainties based on minimizing the relative error between ILI and field measurements is presented. Deterministic codified safety factor approach is simply comparing the nominal burst pressure against the maximum operating pressure where some epistemic uncertainties may or may not be included. On the other hand safety factors can be calibrated to achieve a target reliability level while considering vendor claimed aleatory uncertainties. In reality the uncertainty of ILI measurements may be departure from vendors claim in terms of value and/or statistical properties. Therefore the calibrated safety factor may not be able to capture both aleatory and epistemic uncertainties under one umbrella. Recent advances in application of probabilistic approaches showed an added value for pipeline integrity programs along with it capability to address all types of uncertainties. The probabilistic or reliability-based approach has showed some superiority in this arena compared to deterministic integrity analysis approaches. In studying the three analysis approaches on onshore corroded pipelines operators would have the chance to assess the level of conservatism or non-conservatism in analyzing their corrosion integrity programs. This study presents how a full probabilistic analysis including the measurement uncertainty and calibrated corrosion ILI data can provide more effective and efficient estimation of the corrosion reliability measurements compared to traditional and recommended practice approaches.

Key words: uncertainty, measurement, calibration, In-line inspection (ILI), probabilistic, reliability, corrosion, probability of failure (PoF), failure pressure prediction (FFP), metal loss, integrity assessment, Ultra Sonic (UT) inspection, Magnetic Flux Leakage (MFL) inspection, Non-destructive examination (NDE) measurement

 

 

Product tags
Also Purchased
Picture for Correlation of Inline and Aboveground Integrity Data for Comprehensive Pipeline Integrity Management
Available for download

51317--9648-Correlation of Inline and Aboveground Integrity Data for Comprehensive Pipeline Integrity Management

Product Number: 51317--9648-SG
ISBN: 9648 2017 CP
Author: Chukwuma Onuoha
Publication Date: 2017
$20.00

This paper provides comprehensive correlation of inline and aboveground pipeline integrity data geared at ensuring a complete pipeline integrity management program. Case studies are provided to show benefits of inline inspection and direct assessment correlations.

 
Picture for Validation of Corrosion Growth Rate Models
Available for download

51317--9504-Validation of Corrosion Growth Rate Models

Product Number: 51317--9504-SG
ISBN: 9504 2017 CP
Author: Yan Ping Li
Publication Date: 2017
$20.00

Validation results of feature level and joint level CGR based on feature matching and signal matching. These results enable pipeline operators to establish defect repair schedules and re-inspection intervals with increased confidence.
Picture for Development of a Probabilistic Framework for Integrity and Risk Assessment of Unpigabble Pipelines
Available for download

51317--9560-Development of a Probabilistic Framework for Integrity and Risk Assessment of Unpigabble Pipelines

Product Number: 51317--9560-SG
ISBN: 9560 2017 CP
Author: Carlos Melo Gonzalez
Publication Date: 2017
$20.00

The purpose of this paper is to present a framework for the integrity assessment of unpiggable pipelines, which are subject to internal corrosion. This integrity assessment is done by combining probabilistic flow and corrosion models with risk assessment.
Categories
Industry
Recently viewed
Popular tags
View all

Association for Materials Protection and Performance

© AMPP All Rights Reserved.
Membership Terms of Content Use
Contact Customer Support