Identifying Segments that Can Affect HCA’s Using A NPMS Data Extraction Technique

Identifying Segments that Can Affect HCA’s Using A NPMS Data Extraction Technique

Brad LewisKinder Morgan Energy Partners

Code Requirement

§ 195.452 “…an operator must develop a written integrity management program that addresses the risks on each pipeline segment that could affect a high consequence area.”

Code Requirement

§ 195.452 “…an operator must develop a written integrity management program that addresses the risks on each pipeline segment that could affect a high consequence area.” (emphasis added)

High Consequence Areas Defined

Defining HCA’s - a key Integrity Management Program Development Objective

NPMS (National Pipeline Mapping System)

Defining HCA “impact zones”

Conclusions

Outline

High Consequence Areas

High Population Areas

Other Population Areas

Commercially Navigable Waterways

Ecological USA (14 States)

Drinking Water USA (10 States)

Source: API 1160 latest draft

Identify Potential Pipeline Impact to

HCAs(12/31/01)

1

Initial Data Gathering, Review,

and Integration

Initial Risk

Assessment

Develop BaselinePlan

(3/31/02)

2

Defining HCA’s - a keyIntegrity Management

Objective

EvaluateProgram

Reassess Risk

Update, Integrate, and Review Data

Manage Change

Perform Inspection and/or

Mitigation

Revise Inspection& Mitigation

Plan3

4

• Positional accuracy of ±500 ft has been attempted for all pipelines and LNG facilities. • Positional accuracy is: E = Excellent: within 50 ftV = Very Good: 50-300 ftG = Good: 301-500 ftP = Poor: 501-1000 ftU = Unknown

86%154,000+ miles

National Pipeline Mapping System

Direct Impact Zone – identify points at which pipeline enters and exits an HCA

Indirect Impact Zone – identify HCA’s within set proximity to the pipeline (e.g., ±100ft., ±660ft., ±1 mile) - boundaries based on operating pressure, product type, HCA type(?), etc.

Potential Transport Zone – Evaluate additional zones (beyond direct or indirect) where a rupture has potential to migrate into an HCA - analysis based on rupture volume, product type, terrain conditions, etc.

Defining HCAImpact Zones

Direct Impact Zone Identification

Indirect Impact Zone Identification

What about nearby HCA’s that do not intersect with the pipeline?

What type of buffer should I consider for nearby HCA’s?

OPS Hazardous Liquid Accident Statistics (Avg Net Loss/Accident)

0.0

200.0

400.0

600.0

800.0

1000.0

1200.0

1400.0

1600.0

1800.0

2000.0

1984 1986 1988 1990 1992 1994 1996 1998 2000 2002

Imp

act

Zo

ne

(ft)

1,352 1,670

1,028

1,238

690

929

646

510

664

586

803

1,143

976 996

726

0

200

400

600

800

1000

1200

1400

1600

1800

1986 1987 1988 1989 1990 1991 1992 1993 1994 1995 1996 1997 1998 1999 2000

OPS Hazardous Liquid Accident Statistics

No. of Accidents Avg Gross Bbls/Accident


(off on a tangent)

Potential TransportZone Identification

How do I address the potential for released product to migrate to a distant HCA?– Terrain surrounding the pipeline, including

drainage


[Prevention/Mitigation Section]

195.452 (i)(4) Emergency Flow Restricting Devices (EFRD). If an operator determines that an EFRD is needed on a pipeline segment to protect a high consequence area…”


leak detection/shutdown speed

commodity

rate of potential leakage

volume released

topography or pipeline profile

ignition sources

proximity to power sources

location of response personnel

terrain between the pipeline segment and HCA

benefits expected by reducing the spill size

195.452 (i)(4) EFRD determination must include:

Why go to all this work? We already smart pig this line!

Knowing all these details about the HCA’s is not going to change my integrity assessment plans.

Why not just classify the entire pipeline as an HCA pipeline?

One Final Thought

One Final Thought

One Final Thought

The payoff for defining HCA’s is:– Application of repair criteria– Selection & application of

prevention/mitigation activities

Conclusions

Defining HCA “impact zones” with NPMS data is possible– Custom software required

Defining “transport zones” may require additional analysis & data collection– Determination of EFRD requirements may be satisfied as

a byproduct of the HCA Transport Zone study

Defining HCA’s should produce a large and rapid return

Further Information

Brad Lewis

Kinder Morgan Energy Partners

[email protected]

520/514-1065 ext. 983

Identifying Segments that Can Affect HCA’s Using A NPMS Data Extraction Technique

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