Download - VMT Corrosion Survey Status Report...2012/09/20 · 9/15/2012 1 VMT Corrosion Survey Status Report TOEM Committee PWSRCAC Staff Tom Kuckertz, Linda Swiss, and Anna Carey Corrosion

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VMT Corrosion SurveyStatus Report

TOEM CommitteePWSRCAC Staff

Tom Kuckertz, Linda Swiss, and Anna Carey

Corrosion at VMT

• Scope of Work• Participants• Schedules and timelines• Field activities• Focus Areas for final report• Planned activities• Questions and answers

9/20/2012 Board Meeting PWSRCAC

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Scope of Work

• Extent to which corrosion issues are successfully addressed at VMT

• Cathodic protection at VMT• Procedures and abatement efforts at VMT• Adequacy of inspection schedules • Use of appropriate standards and best

practices• Permitted extants of corrosion


Scope was refined into achieving a set of the following objectives

• Evaluate corrosion control at Valdez Marine Terminal– Only for systems that can cause oil pollution

• Emphasis on procedures• Review condition of

– Corrosion control efforts– Tanks, piping, berths and related equipment

• Recommend changes, if any, that should be considered


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Project Participants

• Dr. Rust Inc.• PWSRCAC Staff• Alyeska Staff


Dr. Rust Inc

• Bob Heidersbach– Direct contractor to PWSRCAC– Pipes and corrosion inhibitors

• Kash Prakash– Tanks– Coatings– Berth facilities

• Bob Guise– Cathodic protection


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Dr. Rust, Inc. In ActionBob Guise, Bob Heidersbach & Kash Prakash


Bob Heidersbach aka Dr. Rust


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PWSRCAC Staff

• Tom Kuckertz • Linda Swiss• Anna Carey• Donna Schantz• Mark Swanson


Alyeska Staff

• Barry Roberts• Steve Lacatena• Clay Forsyth• Doug Fleming• Tawna Beer-Burns, Coffman• Cecilia Sanchez, Baker Hughes


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Why is corrosion a bigger concern with age

• As oilfields age, corrosivity increases• Inspection and corrosion control efforts need

to be increased in aging fields/terminals• Decreased production often leads to

decreased funding for maintenance and inspection at the same time that the need for these efforts increases.

• Alyeska reports that maintenance and inspection funding has increased.


Scheduling and Timeline• Pre-visit Activities – Prior to July 31, 2012

– Requests for and analysis of documentation• Anchorage Activities – July 31-August 3, 2012

– Documents review -- Alyeska’s Anchorage office• Valdez Field Work – August 6 – 9, 2012

– Monday – Admin, safety, security, document requests, facilities access requests

– Tuesday – Look at Berth 4, tanks, CP, piping, fire foam systems– Wednesday – Look at Berth 5 and other VMT locations, – Thursday – Exit briefing

• Draft report – September 2012• Final Report – Revise and review – October thru December 2012• Final report – Proposed for acceptance -- January 2013


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• Covered by Alyeska MP-166.3.21, VMT Facility Underwater Inspections

Berths Structural Integrity


Cathodic ProtectionBerth Platform Legs--OK


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• Fire suppression foam

• AFFF + H2O known to be corrosive

• No longer a corrosionconcern

• “Spiders” in tanks have experienced some corrosion

– Now part of Alyeska T-500 tank inspection protocol (2012 paragraph additions)

AFFF— Aqueous Film Forming Foam


Corrosion Under Insulation (CUI) is of Widespread Industrial Concern

Alyeska reported CUI on eight 20-inch pipes over water on Berths 4 and 5 during week prior to fieldwork in Valdez. Worst case has 70%wall loss.


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A test grid is used to measure and quantify wall loss

Note how corrosion appears to be confined to uncoated welds, a standard practice in the oil industry when the welds were made


Repairs to Berth 4 and 5 piping effected by addition of sleeves and/or recoating

Worst case, shown here, required specially fabricated sleeves. Most of the other affected pipes merely required cleanup and recoating


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Many instances of insulation damage that could allow water to accumulate under it were encountered.


Water under insulation in coupon pull site


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Some places subject to routine inspection had uncorrected water intrusion?


A Coupon-Pull Access Box Full of Water


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A cathodic protection voltage reading is taken during fieldwork


Cathodic Protection Test Point


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Tank 13 floor is recoated as part of a recent API 653 Inspection


Focus Areas for Final ReportFinal Report Still Being Developed

• Corrosion under insulation• Inspectability of piping• Corrosion monitoring• Protective coatings• Cathodic protection• Water intrusion and corrosion reporting


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Activities Timeline

• Interim report prepared• Internal review of interim report – Sept• Draft final report from contractor – Oct• Alyeska and PWSRCAC review of final

report – Oct/Nov• Internal and Committee review of draft

final report – Oct/Nov• Final report from contractor – Dec• Board acceptance – Jan, 2013


Questions & Answers?


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End of Presentation
