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NGA Direct Assessment Projects

NGA Direct Assessment Projects. Debbie DiMeo, Director, Plans and Operations Northeast Gas Association OPS ECDA Public Meeting November 4, 2003. ddimeo@northeastgas.org. NGA Phase 1 ECDA Validation Complete.

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NGA Direct Assessment Projects

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  1. NGA Direct Assessment Projects Debbie DiMeo, Director, Plans and Operations Northeast Gas Association OPS ECDA Public Meeting November 4, 2003 ddimeo@northeastgas.org

  2. NGA Phase 1 ECDA Validation Complete • Began work in 4/02: Prove the ECDA process works and show that it’s a valid integrity assessment technique. • 9 NYS LDC companies and NY PSC • ~20 miles of pipe • 66 excavations • 43 indications • 23 controls • Results reported 4/03

  3. NGA Phase 1 ECDA Statistical Analysis • ECDA quantitatively verified to detect coating flaws and corrosion damage • Indications and controls differ (95% CI) • P(damage) at indication 98% • P(damage)/P(control) = 300/1 • POD for coating flaws f(bare area) • 35% for <1in2 and 100% >6in2

  4. NGA Phase 2 DA ProjectInitiated • Effort initiated April 2003 • Additional ECDA to support validation • 60 miles • 12 companies participating: 8 NYS; 4 o/s NYS • Develop ECDA methods for special areas • Cased crossings • Uncased crossings • Bare pipe • Stray current • ICDA demonstration

  5. Phase 1 and 2 Participants • Nine NYS LDC NGA members participated in Ph 1 DA Validation Project: KeySpan Central Hudson National Fuel St. Lawrence Gas NYS Electric & Gas Consolidated Edison Niagara Mohawk Orange & Rockland Rochester Gas & Electric • Twelve LDCs participating in Ph 2 DA Project: KeySpan Central Hudson National Fuel Enbridge/St. Lawrence Gas NYS Electric & Gas Consolidated Edison Niagara Mohawk Orange & Rockland Rochester Gas & Electric PECO Questar Public Service Electric & Gas

  6. NGA DA More info (www.northeastgas.org) • Debbie DiMeo (ddimeo@northeastgas.org) • Vincent Sottile (vsottile@keyspanenergy.com) • Oliver Moghissi (omoghissi@cctechnologies.com)

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