nga pre-winter briefing on system · pdf file• sop effectiveness reviews ... compressor...
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NGA Pre-Winter Briefing on System ReliabilityNovember 2, 2017Mike DirraneU.S. Marketing
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Enbridge U.S. Transmission Map
Miles of Pipe: 14,129
Compressor Stations: 137
Total Horsepower: 2,391,488
Leidy
SteckmanRidgeAccident
OakfordVector
Texas Eastern
East Tennessee
Algonquin
Maritimes & Northeast
SabalTrail
Gulfstream
SESH
Big Sandy
Moss Bluff
Egan
Bobcat
3
Ozark
AGT System Utilization
0%
10%
20%
30%
40%
50%
60%
70%
80%
90%
100%
2008 2009 2010 2011 2012 2013 2014 2015 2016 2017
TETCO System Utilization
0%
10%
20%
30%
40%
50%
60%
70%
80%
90%
100%
2008 2009 2010 2011 2012 2013 2014 2015 2016 2017
2017 Integrity Summary
Assessments AGT TETLP NE Region Total
ILI runs 18 34 52
Anomalies from 2017 ILI 24 97 121
Scheduled Anomalies 41 76 117
Anomaly Repair Breakdown AGT TETLP NE Region Total
Recoat 21 91 112ClockSpring (composite sleeve) 10 62 72
Pipe Replacement 17 8 25Type B Sleeve 1 1 2
Maintenance Programs
• Turbine overhauls and inspections• Completed at intervals established with the OEM’s
• Solar fuel systems and unit bore scope inspections • Based on a fired hour interval
• Recip Units• Engine Analysis completed on an operating hour internal.
• Periodic, annual, and hour based mechanical and electrical system inspections and testing.• Turbines• Recips• Electric Motor Drives
Continuous Improvement
• Completed review of Maintenance Standards in (5 to 7 year frequency)• Annual ad hoc review of Maintenance Standards• Formalized Winter and Storm Preparation procedures• Review and update annually program/plan• SOP Effectiveness Reviews (1 to 3 year frequency)
E-1 System9.1 mi L&R 6”w/16”
Cromwell Discharge2.0 mi 36” Loop
Ramapo to Stony Point3.3 mi L&R 26”w/42”
E-1 System1.3 mi 12” Loop
SouthburyMiddletown-YGS
WillimanticMontvilleGuilford
GlastonburyAssonet
North Fall RiverWellesleyNorwoodBrockton
Middleborough
Cromwell C/SAdd Mars 100 (15,900 HP)
Burrillville C/SAdd Mars 100 (15,900 HP)
2016
2015YEAR COLOR KEY
PeekskillCortlandt
West DanburyPutnumPomfret
WaterburyOakland Heights
GreenvilleNorth HavenFarmingtonNeedham
MysticNew BedfordWest Roxbury
Stony Point C/SAdd 2 Mars 100s (31,800 HP)
Southeast C/SAdd Taurus 70 (10,320 HP)
2015/2016
West Roxbury Lateral4.2 mi New 16”0.9 mi New 24”
AIM Total HP = 81,620
YorktownDanbury
Salem PikePine HillsPlymouthNeedham
Stony Point Discharge12.3 mi L&R 26”w/42”
(Includes new 0.7 mi 42” Hudson River HDD)
4.1 mi L&R 26” w/42”
Weymouth C/S (Proposed)Taurus 70 (10,900 HP)
Oxford C/SAdd Taurus 70 (10,900 HP)
Southeast Discharge4.5 mi L&R 26”w/42”
Includes Rt 84 HDD (0.7 miles)
2.3 mi L&R 26” w/42”
AB Total HP = 28,100
Chaplin C/SAdd Taurus 60 (7,700 HP)
Add Centaur 50 (10,900 HP)2017
AIM Meter & Regulator Stations 3 new stations
23 station modifications
AB M&R Stations 1 new station
5 station modifications
Algonquin Incremental Market 342 Project and
Atlantic Bridge 132 Project
AB
AIM
Incident location
Texas Eastern in Pennsylvania
Penn-Jersey Evaluations (Post Delmont)
• Excavation and Evaluation of pipe with tape coating throughout four Compressor Stations on PJ System. No significant integrity concerns found.
• Excavation and Evaluation of pipe with tape coating at three (3) crossover headers on PJ System. No significant integrity concerns found.
• Completed Close Interval Survey (CIS) Delmont to Armagh.• Performed twenty-four (24) Stress Corrosion Cracking Direct Assessments
(SCCDA). No indications of SCC observed.
Improving New England’s future energy reliability, cost volatility and competitiveness
Regional Supplies
HalifaxSt. John
Fredericton
Bangor
Portland
Portsmouth
Boston
Atlantic BridgeProject Scope:• ~135 MMcf/d expansion of the Algonquin and
Maritimes & Northeast Pipelines Project Status:• Filed FERC application Oct 2015• FERC certificate received Jan 2017• In-service 2H17 – 2H18
Access Northeast• Joint development with Eversource & National GridProject Need:• Natural gas generation has increased from 15% to 50%
market share since 2000• Additional natural gas infrastructure is needed to serve
growing gas generation
Northeast Expansions on AlgonquinAccess Northeast & Atlantic Bridge
Algonquin and Maritimes systems directly connect to 60% of ISO-NE’s gas-fired generators
New gas-fired generators totaling ~2,570 MW attaching to Algonquin by 2019
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