11

Philip SherPhilip Sher Connecticut Department of Public Utility Control Connecticut Department of Public Utility Control

Gas Pipeline Safety UnitGas Pipeline Safety Unit

RepresentingRepresenting

NAPSRNAPSRNational Association of Pipeline Safety RepresentativesNational Association of Pipeline Safety Representatives

November 4, 2003November 4, 2003

Direct AssessmentDirect Assessment

22

NAPSRNAPSR

NAPSR = National Association of Pipeline NAPSR = National Association of Pipeline Safety RepresentativesSafety Representatives

non-profit organizationnon-profit organization state pipeline safety directors, managers, state pipeline safety directors, managers,

inspectors and technical personnelinspectors and technical personnel to support, encourage, develop and enhance to support, encourage, develop and enhance

pipeline safety regulationpipeline safety regulation

Founded on December 2, 1982Founded on December 2, 1982

33

Integrity Management ProgramIntegrity Management Program

Pipeline IMPPipeline IMP

==

““a plan or system” “to handle or direct a plan or system” “to handle or direct with a degree of skill” the “soundness” with a degree of skill” the “soundness” of a pipeline systemof a pipeline system

44

We Need Integrity ManagementWe Need Integrity Management

Bellingham, WA

Carlsbad, NM

Edison, NJ

55

We Will Have Integrity We Will Have Integrity ManagementManagement

66

Steps in Risk ManagementSteps in Risk Management

77

88

99

1010

ANSI Gas Piping Technology Committee & ANSI Gas Piping Technology Committee & ANSI B31.8SANSI B31.8S

Integrity Management Process.Integrity Management Process.

1111

High Consequence AreaHigh Consequence Area– The Real World– The Real World

1212

Integrity Assessment MethodsIntegrity Assessment Methods

1.1. Smart pigSmart pig

2.2. Pressure testPressure test

3.3. Direct Direct assessmentassessment

4.4. Other (new Other (new technologytechnology))

1313

Smart PigsSmart Pigs

11stst smart pigs – mid 1960’s, primarily smart pigs – mid 1960’s, primarily for the detection of wall thinning. Now for the detection of wall thinning. Now other types of defects - cracks, other types of defects - cracks, coating disbondment, dents and coating disbondment, dents and gouges - are detectablegouges - are detectable

Smart pig digs have served to Smart pig digs have served to calibrate and validate smart pig calibrate and validate smart pig resultsresults

1414

Smart PigsSmart Pigs Smart pigs needSmart pigs need

launchers & receiverslaunchers & receivers long radius bendslong radius bends full opening valvesfull opening valves constant pipe diameterconstant pipe diameter

Smart pigs may require Smart pigs may require interruptioninterruption

25-30% of transmission 25-30% of transmission pipelines are piggablepipelines are piggable

1515

Pressure TestingPressure Testing

Require taking pipeline out of serviceRequire taking pipeline out of service Water removal can be difficultWater removal can be difficult Water can promote internal corrosionWater can promote internal corrosion Pressure testing can grow subcritical Pressure testing can grow subcritical

flaws into critical flawsflaws into critical flaws Pressure test provides limited Pressure test provides limited

information and limited evaluation of information and limited evaluation of future performancefuture performance

1616

Direct AssessmentDirect Assessment ECDA =ECDA = External Corrosion Direct External Corrosion Direct

AssessmentAssessment ICDA =ICDA = Internal CorrosionInternal Corrosion

Direct Direct AssessmentAssessment SCCDA=SCCDA= Stress Corrosion Cracking Stress Corrosion Cracking

Direct AssessmentDirect Assessment

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ECDA 4 Step ProcessECDA 4 Step Process

Step 1 - Pre AssessmentStep 1 - Pre Assessment Step 2 - Indirect ExaminationStep 2 - Indirect Examination Step 3 - Direct ExaminationStep 3 - Direct Examination Step 4 - Post AssessmentStep 4 - Post Assessment

1818

Direct AssessmentDirect Assessment

Absolute need for DAAbsolute need for DA MUST be perfectedMUST be perfected Must define parameters where it Must define parameters where it

worksworks Must define parameters to evaluate it Must define parameters to evaluate it

in usein use Must develop body of knowledge and Must develop body of knowledge and

talent to utilize DAtalent to utilize DA

1919

Tools of ECDATools of ECDA

Cathodic Protection Readings (CP)Cathodic Protection Readings (CP)

2020

Tools of ECDATools of ECDA

Close Interval Survey (CIS)Close Interval Survey (CIS)

2121

Tools of ECDATools of ECDA

Direct Current Voltage Gradient (DCVG)Direct Current Voltage Gradient (DCVG)

2222

Tools of ECDATools of ECDA

C-Scan (The C-Scan mode or pulse-echo C-Scan (The C-Scan mode or pulse-echo provides a planar view image at a specific provides a planar view image at a specific depth. Illustrations of delaminations and depth. Illustrations of delaminations and void formation can be generated.)void formation can be generated.)

2323

Tools of ECDATools of ECDA

Current MapperCurrent Mapper

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Direct AssessmentDirect Assessment

Some DA tools are old and there is Some DA tools are old and there is considerable experienceconsiderable experience

Some DA tools are new with little Some DA tools are new with little experienceexperience

The DA process is new incorporating old The DA process is new incorporating old and new tools, old and new techniques, and new tools, old and new techniques, and significant new data integration and and significant new data integration and documentationdocumentation

2525

Direct AssessmentDirect Assessment

Just as smart pig needed calibration and Just as smart pig needed calibration and verification, DA will also need to be verification, DA will also need to be proven for the many conditionsproven for the many conditions

that may exist.that may exist. DA must be repeatableDA must be repeatable DA must have a high level of confidenceDA must have a high level of confidence Operator must demonstrate complianceOperator must demonstrate compliance Regulator must confirm complianceRegulator must confirm compliance

2626

Reassessment PeriodReassessment Period

Original proposed reassessment Original proposed reassessment periodperiod

Final reassessment period?Final reassessment period?

2727

2828

Ultimate GoalUltimate Goal

2929