NATURAL GAS PIPELINE CASE STUDY: VTC … untested gas transmission steel pipelines in HCAs Case Study Discuss Southern Star Central Gas Pipeline’s consideration for the Re-Confirmation

[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


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.


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


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.


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.


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



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



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….




OUR SOLUTION

0

8

16

24

32

40

48

56

64

72

80

0

100

200

300

400

500

600

0 10,000 20,000 30,000 40,000 50,000 60,000 70,000

Yie

ld S

tren

gth

[k

si]

Yie

ld S

tren

gth

[M

PA

]

Log Distance

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


CONTENT

Slide 14

Comprehensive Data Integration

• Record Verification

• Record Completion

• Discrepancy Analysis for Inconsistent Records


KEY ADVANTAGE


KEY ADVANTAGE

0

8

16

24

32

40

48

56

64

72

80

0

100

200

300

400

500

600

0 10,000 20,000 30,000 40,000 50,000 60,000 70,000

Yie

ld S

tren

gth

[k

si]

Yie

ld S

tren

gth

[M

PA

]

Log Distance



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


Slide 17






KEY ADVANTAGE


KEY ADVANTAGE

0

8

16

24

32

40

48

56

64

72

80

0

100

200

300

400

500

600

0 10,000 20,000 30,000 40,000 50,000 60,000 70,000

Yie

ld S

tren

gth

[k

si]

Yie

ld S

tren

gth

[M

PA

]

Log Distance



Case study two: Completion of Records

Slide 19

0

8

16

24

32

40

48

56

64

72

80

0

100

200

300

400

500

600

0 10,000 20,000 30,000 40,000 50,000 60,000 70,000

Yie

ld S

tren

gth

[k

si]

Yie

ld S

tren

gth

[M

PA

]

Log Distance


Yield strength per joint (ILI) Sections with pipeline records RoMat determined Pipe Grade


Slide 20






KEY ADVANTAGE


KEY ADVANTAGE

0

8

16

24

32

40

48

56

64

72

80

0

100

200

300

400

500

600

0 10,000 20,000 30,000 40,000 50,000 60,000 70,000

Yie

ld S

tren

gth

[k

si]

Yie

ld S

tren

gth

[M

PA

]

Log Distance



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


CASE STUDY TWO


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



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


Slide 24

1. The Challenge

2. Our Solution

3. Key Advantages

4. Conclusion


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.


CONCLUSION

www.rosen-group.com

THANK YOU FOR JOINING

THIS PRESENTATION.

[COMPETENCE][PEOPLE]

[INDUSTRIES]

[TRUST]

[RELIABILITY][TECHNOLOGY]

[INNOVATION][INDEPENDENT]

[CAN DO]

Documents

NATURAL GAS PIPELINE CASE STUDY: VTC … untested gas transmission steel pipelines in HCAs Case Study Discuss Southern Star Central Gas Pipeline’s consideration for the Re-Confirmation