NATURAL GAS PIPELINE CASE STUDY: VTC … untested gas transmission steel pipelines in HCAs Case...
Transcript of NATURAL GAS PIPELINE CASE STUDY: VTC … untested gas transmission steel pipelines in HCAs Case...
[COMPETENCE][PEOPLE]
[INDUSTRIES]
[TRUST]
[RELIABILITY][TECHNOLOGY]
[INNOVATION][INDEPENDENT]
[CAN DO]
David Coomes – Southern Star Central Gas Pipeline
Christopher De Leon – Rosen
AGA Operations Conference · Phoenix AZ
21-Apr-2016
NATURAL GAS PIPELINE CASE STUDY:
VTC RECORDS USING ILI
Slide 2
1. The Challenge
2. Our Solution
3. Key Advantages
4. Conclusion
Case Study VTC Using ILI · C. DeLeon & D. Coomes · © ROSEN Group · 21-Apr-2016
CONTENT
Slide 3
1. The Challenge
2. Our Solution
3. Key Advantages
4. Conclusion
Case Study VTC Using ILI · C. DeLeon & D. Coomes · © ROSEN Group · 21-Apr-2016
CONTENT
Slide 4
MAOP Re-Confirmation
• PSA § 23 – Operators are required to identify pipeline section with insufficient
records to substantiate MAOP for steel pipelines
• PSA § 23 – MAOP must be reconfirmed for sections with insufficient records
• PSA § 23 – Requires conducting tests to confirm material strength of
previously untested gas transmission steel pipelines in HCAs
Case Study
Discuss Southern Star Central Gas Pipeline’s consideration for the Re-
Confirmation of MAOP for Line TGA – Gordon Evans 16” natural gas pipeline.
Case Study VTC Using ILI · C. DeLeon & D. Coomes · © ROSEN Group · 21-Apr-2016
THE CHALLENGE
Slide 5Case Study VTC Using ILI · C. DeLeon & D. Coomes · © ROSEN Group · 21-Apr-2016
THE CHALLENGE
Pipeline Data Information
Nominal Diameter 16
Type of Pipe Longitudinal Weld, Unknown
Grade API 5L 42, x52, x60, and x24 (Unknown)
Nominal Wall Thickness .250” nominal / .202” minimum / .375” maximum
MAOP 450 PSI Based on Test Pressure
Design Pressure 656 PSI Minimum Line Pressure / 505 PSI
Minimum Settings
Minimum Bend Radius 1.5D
Length 13.24 miles
Installation 1963
Product Natural Gas
Slide 6
1. The Challenge
2. Our Solution
3. Key Advantages
4. Conclusion
Case Study VTC Using ILI · C. DeLeon & D. Coomes · © ROSEN Group · 21-Apr-2016
CONTENT
Slide 7
RoMat PGS
This tool is equipped with ROSEN Pipe Grade Sensors, available from 10” to 56”
in single, dual, multi-diameter, LPLF, and robotic configurations.
The RoMAT PGS tool operates under the same standard specifications Pipeline
Operators are familiar with for MFL inspections.
Data reporting specifications are published at +/- 7KSI of the Yield Strength
calculated for each joint. Which can be validated using industry ILI Qualification
Standard API 1163.
Comprehensive Data Integration Approach to perform Discrepancy Analysis of
pipe properties for MAOP Validation: OD, WT, Pipe Grade. Offers strong
evaluation technique for pipeline record verification and supplementation.
Case Study VTC Using ILI · C. DeLeon & D. Coomes · © ROSEN Group · 21-Apr-2016
OUR SOLUTION
Slide 8
The approach is to use ‘classic’ Integrity Management Programs (IMP) practices
and latest technology in Data Integration and Non-Destructive Testing (NDT),
allowing for pipe property characterization.
This approach gives confidence to a process for material documentation to be
Verified using the industry trusted ILI platform, Complete with quantitative
properties on a joint to joint basis, and Traceable through proper documentation
per Industry Standards, Operator Specifications and Regulatory Requirements.
Case Study VTC Using ILI · C. DeLeon & D. Coomes · © ROSEN Group · 21-Apr-2016
MATERIAL DOCUMENTATION PROCESS
Slide 9
Objective:
• Gather and Review data on Design, Material, and Testing Documentation
• Verify and Complete Material Records.
Supplementing Missing or Inadequate Material Docs:
• Share Material Records with ROSEN for discrepancy analysis
• Run ILI tool to determine pipe properties including; diameter, wall thickness,
grade, joint length, and location
• Perform Discrepancy Analysis between ILI data and Material Records.
• Verify ILI System Performance.
• Records Change Management
Case Study VTC Using ILI · C. DeLeon & D. Coomes · © ROSEN Group · 21-Apr-2016
MATERIAL DOCUMENTATION PROCESS
Slide 10
Review documentation for MAOP Validation:
• Review all pipe segments within database
• Determine any missing segments
• Review the Construction documentation to determine TVC records for all pipe
segments
• Review testing records associated with segment
• Review Class change information
Case Study VTC Using ILI · C. DeLeon & D. Coomes · © ROSEN Group · 21-Apr-2016
MATERIAL DOCUMENTATION PROCESS
Slide 11
Discrepancy Decision Process:
• If ILI call is higher Keep Current Grade
• If ILI call is lower,
• Investigate ILI System Data with ROSEN: Tool, Sensor, Evaluation results
• Review Material Documentation again
• Make most conservative call for grade, ILI or Record
• Determine how this impacts line MAOP per 192.619 (a) (1)
Supplement Decision Process:
• Use conservative ILI Pipe Grade call
• Re-confirm MAOP using ILI Pipe Grade call
• Record change Management in GIS, etc….
Case Study VTC Using ILI · C. DeLeon & D. Coomes · © ROSEN Group · 21-Apr-2016
MATERIAL DOCUMENTATION PROCESS
Slide 12Case Study VTC Using ILI · C. DeLeon & D. Coomes · © ROSEN Group · 21-Apr-2016
OUR SOLUTION
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16” Pipeline – Pipe Grade Determination
Yield strength per joint (ILI) Sections with pipeline records Sections with unknown grade
Slide 13
1. The Challenge
2. Our Solution
3. Key Advantages
4. Conclusion
Case Study VTC Using ILI · C. DeLeon & D. Coomes · © ROSEN Group · 21-Apr-2016
CONTENT
Slide 14
Comprehensive Data Integration
• Record Verification
• Record Completion
• Discrepancy Analysis for Inconsistent Records
Case Study VTC Using ILI · C. DeLeon & D. Coomes · © ROSEN Group · 21-Apr-2016
KEY ADVANTAGE
Slide 15Case Study VTC Using ILI · C. DeLeon & D. Coomes · © ROSEN Group · 21-Apr-2016
KEY ADVANTAGE
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Case study one: Verification of Records
Slide 16
Records review:
Ordered pipe: X 42; API 5 L
Delivered pipe: X42/ X52; API 5L
Requirement for yield strength API 5L
X 42 Min./Max. Yield 42 ksi/72ksi
X 52 Min./Max. Yield 52 ksi/77ksi
Investigation on mill certs: yield strength between 58 ksi and 62 ksi
Tool measurements: yield strength between 60 ksi and 63 ksi
Inspection System Result Verification insitu: verification joint = 63.02 ksi
CASE STUDY ONE
Case Study VTC Using ILI · C. DeLeon & D. Coomes · © ROSEN Group · 21-Apr-2016
Slide 17
Comprehensive Data Integration
• Record Verification
• Record Completion
• Discrepancy Analysis for Inconsistent Records
Case Study VTC Using ILI · C. DeLeon & D. Coomes · © ROSEN Group · 21-Apr-2016
KEY ADVANTAGE
Slide 18Case Study VTC Using ILI · C. DeLeon & D. Coomes · © ROSEN Group · 21-Apr-2016
KEY ADVANTAGE
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Case study two: Completion of Records
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16” Pipeline – Pipe Grade Determination
Yield strength per joint (ILI) Sections with pipeline records RoMat determined Pipe Grade
Case Study VTC Using ILI · C. DeLeon & D. Coomes · © ROSEN Group · 21-Apr-2016
Slide 20
Comprehensive Data Integration
• Record Verification
• Record Completion
• Discrepancy Analysis for Inconsistent Records
Case Study VTC Using ILI · C. DeLeon & D. Coomes · © ROSEN Group · 21-Apr-2016
KEY ADVANTAGE
Slide 21Case Study VTC Using ILI · C. DeLeon & D. Coomes · © ROSEN Group · 21-Apr-2016
KEY ADVANTAGE
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Yield strength per joint (ILI) Sections with pipeline records Sections with unknown grade
Case study three: Discrepancy Analysis
Slide 22
Re-Allocation of pipe line at a river crossing
Ordered pipe: X 52; API 5L
Delivered pipe: X 52; API 5L
Requirement for yield strength API 5L
X 52 = Min./Max. Yield 52 ksi/77ksi
Tool measurements: Section: 55 ksi until 58 ksi
Outlier 1 yield strength 47.94 ksi
Outlier 2 yield strength 47.09 ksi
CASE STUDY TWO
Case Study VTC Using ILI · C. DeLeon & D. Coomes · © ROSEN Group · 21-Apr-2016
Slide 23
Re-Allocation of pipe line at a river crossing
Ordered pipe: X 52; API 5 L
Delivered pipe: X 52; API 5L
Requirement for yield strength
X 52 = Min./Max. Yield 52 ksi/77ksi
Tool measurements: Section: 55 ksi until 58 ksi
Outlier 1 yield strength 47.94 ksi
Outlier 2 yield strength 47.09 ksi
Discrepancy was found between MAOP record and As-Built at the river
crossing. As-Built indicated pups were installed but no material records
were found. Joints established as X-46 per ILI.
CASE STUDY TWO
Case Study VTC Using ILI · C. DeLeon & D. Coomes · © ROSEN Group · 21-Apr-2016
Slide 24
1. The Challenge
2. Our Solution
3. Key Advantages
4. Conclusion
Case Study VTC Using ILI · C. DeLeon & D. Coomes · © ROSEN Group · 21-Apr-2016
CONTENT
Slide 25
The Pipeline Safety Act requires the re-confirmation of MAOP for pipelines with
insufficient records.
Scatter plots of the recorded ILI pipe property data (for each joint) divides the
pipeline into manageable segments for TVC and MAOP re-confirmation.
Leveraging the In-Line Inspection platform enables the use of current Standard
Operating Procedures and System Verification per industry accepted API 1163.
Critical pipe property determination without costly excavation including Pipe
Grade.
Holistically, this approach to leveraging ILI data for pipe property determination
increases the accuracy of pipeline integrity programs, enabling a better
understanding the presence of risks along the pipeline.
Case Study VTC Using ILI · C. DeLeon & D. Coomes · © ROSEN Group · 21-Apr-2016
CONCLUSION