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Appalachian Underground Corrosion Short Course 2012

DATA INTEGRATION

E L I Z A B E T H N I C H O L S O NC A T H O D I C T E C H N O L O G Y L I M I T E D

Data Integration

D t i t ti i l D t i t ti i l Data integration involves Data integration involves combining data residing in combining data residing in

different sources and different sources and providing users with a unified providing users with a unified

view of these data. view of these data.

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ECDA Data

E X T E R N A L C O R R O S I O N D I R E C T A S S E S S M E N T E X T E R N A L C O R R O S I O N D I R E C T A S S E S S M E N T R E Q U I R E S A C C U R A T E R E C O R D K E E P I N G R E Q U I R E S A C C U R A T E R E C O R D K E E P I N G

A N D K N O W L E D G E O F Y O U R S Y S T E MA N D K N O W L E D G E O F Y O U R S Y S T E M

ECDA Data

Some of the data required is; Accurate maps of the pipelineAccurate maps of the pipeline

Know the location of the pipeline in the field

Inventory the system including location & condition

Test results

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Pipeline Information

Important Information

Pipeline history Installation date & methodInstallation date & method

Material & coating

System inventory

Know where your pipeline is, maps, GPS, etc.

Operation & maintenance history

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Inventory Your System

Test Stations

Casings Casings

Bonds

Rectifiers

Insulated flanges

Sleeves

Sacrificial anodes

Etc.

Mapping Your Pipeline

The location of the pipeline can be plotted ontopographic maps, aerial surveys or entered into ap g p p , ymapping program

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Mapping Your Pipeline

Google Earth is ideal for plotting pipelines and other features/facilitiesfeatures/facilities

Pipeline Location

With the assistance of a pipe locator the location of the pipeline can be p paccurately recorded during a close interval survey

Pipe to soil data can be correlated with other test data

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Sub-Metre Location Accuracy

Modern GPS Engines can determine locations

i hi within 200 mm – 1000 mm (8in – 3ft)

High Consequence Areas

Buildings close to pipelinepipeline

Wet lands

River and stream crossings

Foreign crossings

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Operating History

What fluid & pressure pressure

Leak history

Maintenance work & digs

Repair work

Personnel

Sometimes the field guys know things the office guys d ’don’t.

•How many times that area has been dug up

•Were anodes installed directly to the pipe?

•Landowner issues

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Pipeline Conditions

When was the last time the right of way was l d?cleared?

Are there any issues Road crossing

Cliffs

Landowners

Livestock

Pipeline Conditions

Encourage departments to share information

Have someone walk the line

Keep in contact with local people

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Test Results

Test Results

There are a number of ways to monitor the corrosion potential of a pipeline;corrosion potential of a pipeline; Test station surveys

Rectifier logs

Close Interval Potential Surveys

Direct Current Voltage Gradient Surveys

Internal inspection tools (Pigs)

Physical inspection from digs

Corrosion coupons

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Test Station Surveys

Performed on a regular basis TP 10-367

When compared with prior readings, changes to the CP are seen

10-May-04 -1235

02-May-03 -1175

08-Jun-02 -1198

03-Jun-01 -1210

23-May-00 -1225

15-May-99 -1185

Test Station 10-367-1240

-1230

-1220

-1210

-1200

-1190

-1180

-1170

-1160

-1150

-1140

Ma

y-9

9

Ma

y-0

0

Ma

y-0

1

Ma

y-0

2

Ma

y-0

3

Ma

y-0

4

Rectifier Logs

Obtained by field crews or through remote

i iRectifier 123

monitoring

Graphing the data over time can reveal trends

Volts Amps

11-May-04 23 10.5

09-Apr-04 21 11.4

18-Mar-04 19 12.6

15-Feb-04 22 11.1

12-Jan-04 21 10.2

16-Dec-03 23 10.5

04 Nov 03 22 10 8

Rectifier 123

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25

04-Nov-03 22 10.8

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Date

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Volts Amps

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CIPS Surveys

Close Interval Potential Survey records the level

f CP l i li

90451 -1318 -1180

90453 -1357 -1190

90455 -1279 -1185of CP along a pipeline

Used with NACE SP0169 criterion

90 55 9 85

90459 -1313 -1188

90464 -1294 -1185

90467 -1367 -1190

90473 -1328 -1195

90476 -1350 -1191

90481 -1281 -1190

90484 -1281 -1186

CIPS-1600

-1400

-1200

-1000s

90491 -1259 -1178-1000

-800

-600

-400

-200

0

90451 90453 90455 90459 90464 90467 90473 90476 90481 90484 90491

Chainage Feet

Po

ten

tia

l Mill

ivo

lt

rect on rect of f Criterion

DCVG Surveys

Direct Current Voltage Gradient and other

i h d coating survey methods provide an indication of any defects in the coating and their size

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Modern CIPS Survey Equipment

GPS synchronized with interrupters Records distance/chainage/ g Rectifier ON and OFF potentials Rectifier ON and OFF voltage gradients GPS coordinates UTC time Signal quality Altitude Other information entered by user

CIPS Data Table

9045190451 --13181318 --11801180 --850850 144252144252 4343 49.373949.3739 NN 7070 26.3126.31 WW 11 77 22 105.7105.7

9045390453 --13571357 --11371137 --850850 144253144253 4343 49.374549.3745 NN 7070 26.309926.3099 WW 11 88 2.12.1 105.8105.8

Dist. ON OFF Crit Time Lat Long Sig Sat Pdop Eliv

9045590455 --12791279 --11851185 --850850 144254144254 4343 49.374849.3748 NN 7070 26.3126.31 WW 11 88 2.12.1 106106

9045990459 --13131313 --11641164 --850850 144256144256 4343 49.375649.3756 NN 7070 26.310426.3104 WW 11 88 3.23.2 106106

9046490464 --12941294 --11951195 --850850 144258144258 4343 49.376249.3762 NN 7070 26.310626.3106 WW 11 99 44 105.8105.8

9046790467 --13671367 --11691169 --850850 144259144259 4343 49.376949.3769 NN 7070 26.310826.3108 WW 11 99 2.42.4 105.7105.7

9047390473 --13281328 --11181118 --850850 144301144301 4343 49.378249.3782 NN 7070 26.311326.3113 WW 11 99 2.82.8 105.5105.5

9047690476 --13501350 --11911191 --850850 144302144302 4343 49.378749.3787 NN 7070 26.311626.3116 WW 11 99 2.82.8 105.5105.5

9048190481 --12811281 --11901190 --850850 144304144304 4343 49.379849.3798 NN 7070 26.311826.3118 WW 11 99 33 105.1105.1

9048490484 --12811281 --11061106 --850850 144305144305 4343 49.380149.3801 NN 7070 26.31226.312 WW 11 99 3.13.1 105105

9049190491 --12591259 --11781178 --850850 144308144308 4343 49.381449.3814 NN 7070 26.312726.3127 WW 11 99 2.42.4 104.8104.8

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CIPS Data Graph

Internal Inspection

Inline inspection tools (smart pigs) can be used to monitor the wall thickness of a pipelinep p

Changes in wall thickness can indicate a corrosion problem

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Stray Current

When performing a CIPS, set out a CIPS, set out a stationary data logger in the survey area

The data will show t ll i any telluric or

dynamic stray current on the line

Stray Current Correction

GPS time stamp is used to compare the logger data with the mobile CIPS datawith the mobile CIPS data

Correcting for the stray current provides a more accurate reading of the CP on the pipeline CIPSCorrected = CIPSTime X + (LoggerTime X – Average

(LoggerTime Interval))

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Stray Current

DYNAMIC STRAY CURRENT- 3000

- 2500

L3P0385-L3P0396/CIPS ORIGINAL DATA

- 2500

- 2300

Data From Test StationData From Test Station CIPS Data Along PipelineCIPS Data Along Pipeline

- 2000

- 1500

- 1000

- 500

0

500

10001 1116 2231 3346 4461 5576 6691 7806 8921 10036 11151 12266 13381 14496 15611 16726 17841 18956 20071 21186 22301

UTC TIME

PO

TE

NT

IAL

MIL

LIV

OL

TS

P/ S on P/ S of f Cr i t er i on

- 2300

- 2100

- 1900

- 1700

- 1500

- 1300

- 1100

- 900

- 700

- 5000 500 1000 1500 2000

CHAINAGE（M）

PO

TE

NT

IAL（

MV）

r ect on rect of f cr i t eri on

Corrected CIPS DataCorrected CIPS Data

L3P0385-L3P0396/CIPS CORRECTED DATA

- 2500

- 2300

- 2100

- 1900

- 1700

- 1500

- 1300

- 1100

- 900

- 700

- 5000 500 1000 1500 2000

chainage（M）

（P

oten

tial

MV）

cri t er i on cor r on cor r of f

Combining Data

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Integrated CIPS & DCVG

CIPS and DCVG surveys can be undertaken i l l f simultaneously for

increased accuracy

Combined CIPS + DCVG Surveys

By combining CIPS & DCVG, a correlation in the data is easy to see

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Combined CIPS + DCVG Surveys

The combined data makes it easier to assess the requirement for mitigationthe requirement for mitigation

Coating defects that result in unprotected pipe should be repaired

CIPS + DCVG not only point out the coating defects but the areas where corrosion is likely occurring.y g

Combined CIPS + DCVG Surveys

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Internal Inspection

©NACE Paper 2012-0001231 by S. Segall

Correlation Digs

Correlation Digs are required in qmost jurisdictions

Investigate trouble spots from the surveys

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Correlation Digs

Correlation Digs

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Correlation Digs

Accurate Accurate survey data allows accurate assessment on daylighting a pipeline

Combining Multiple Sources

All of the data sources discussed and others can be looked at togetherlooked at together

By knowing the pipeline information and results from multiple tests, a complete picture of the line condition can be seen

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Example

CIPS meets criterion, DCVG shows defect, no construction in the area in years, PIG shows construction in the area in years, PIG shows consistent wall thickness

Monitor low probability of corrosion

Example

CIPS goes below criterion, DCVG shows defect new maps show a new subdivision in defect, new maps show a new subdivision in that area

High priority for repair Coating damage Coating damage

High consequence area

Inadequate levels of CP

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Example

CIPS goes below criterion, DCVG shows no defect foreign line in the areadefect, foreign line in the area

More investigation Possible stray current interference

Foreign pipeline Foreign pipeline

DC transit, welding, mining, etc.

Soil resistivity

Comparing Years

Another test data source is from prior years and surveyssurveys

When you have access to multiple years of data for your pipeline, it can be useful to compare the results

Trends can appear

Also acts as a check for your survey methodology

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Comparing Years

Data Storage

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Data Integration

There is lots of data available, now what? Know where the information/reports are stored in the office Know where the information/reports are stored in the office

or on the computer

Insist that any surveys done provide you with an electronic copy of the data

Purchase a database program to bring the different pieces of data together

Design your own database programg y p g

Data Base Programs

There are several commercially available d b

General DB:

Oracledata base programs on in which you can store the information required for ECDA

Microsoft Access

AutoCAD Map

Pipeline Specific:

ProActive

BassTrigon

GreenPipe

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Database Considerations

Before purchasing software consider: Number & ability of usersNumber & ability of users

Other systems that need to connect, i.e. remote monitoring

In house technical ability

Type and amount of data to be tracked

Import/export ability, especially for your survey data

Budget

PhysicalPhysical IntellectualIntellectual

Database Security

•How to protect the data integrity

•Backup on a regular schedule

•Protect computers from

•Who has access to info?•Who decides?

•Is there information that is confidential?

•Can you have different levels f ?power surges

•Off-site backup•In case something ever happens to your office

of access?

•Can you view/print/share information when needed?

•Unauthorized data entry

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In Conclusion

Know your pipeline and what data is available to you

Know what works for you and your company Know what works for you and your company

Keep the data together as much as possible

Compare different data sets to look for commonalities and changes

Thank You For Your Time and Attention

ELIZABETH NICHOLSON

C A T H O D I C T E C H N O L O G Y L I M I T E D