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Development of a Cargo Oil Tank Coating Performance Standard

Development of a Cargo Oil Tank Coating Performance Standard. Andy Alderson - Manager RINA UK Chairman – JWG/COTCPS. Background. Industry IACS JWG/Corrosion – Feb 2004 Draft proposal for UR on cargo tank coating Put on hold pending further studies

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Development of a Cargo Oil Tank Coating Performance Standard

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  1. Development of a Cargo Oil Tank Coating Performance Standard Andy Alderson - Manager RINA UK Chairman – JWG/COTCPS

  2. Background • Industry IACS JWG/Corrosion – Feb 2004 • Draft proposal for UR on cargo tank coating • Put on hold pending further studies • EMSA Expert Group on DH Tankers 2004-05 • Recommendation from the group to development of a performance standard to follow up a proposal to IMO. • JWG/COTCPS Established April 2006 • First meeting 7th June 2006 Portsmouth

  3. JWG-COTCPS members • BIMCO • CSNAME • IACS • ICS • INTERTANKO • KOSHIPA • OCIMF • SAJ • TSCF

  4. Development • If coating of cargo tanks is mandated in SOLAS, the objective is to provide the coating performance standard. • The standard is based on the performance standard developed for ballast tanks. • It is modified only to take into account the differences between Cargo Tanks and Ballast tanks • It is intended as a minimum standard and recognises that higher standards may be applied.

  5. Differences with Ballast Tanks • Type of coating and compatibility with cargoes • Lack of experience, voluntary coating of cargo tanks on crude oil tankers is generally less then 5years • Area of coating, tank tops and under deck only • Construction and size of tanks

  6. Outstanding Issues • Area of application; • Deck head with complete internal structure, including brackets connecting to longitudinal and transverse bulkheads; • Vertical plating of surrounding bulkheads with attached structure extending 10% of the tanks height but not more than 3 m down from the deck with additional 100mm around vertical brackets • Down to and including the top of the uppermost PMA, and toes of brackets.

  7. Outstanding Issues • Area of Application • Inner bottom and vertically 1m above inner bottom (industry) or • Inner bottom up to the underside of the first longitudinal stiffener but not less than 0.5m • Inner bottom up to 0.1m • Permanent Means of Access • How much of this should be coated? All, none, or only if inside the area previously mentioned.

  8. Outstanding Issues • Develop Test method for Type Approval of Coatings • What environment ? • Cargo specification? • H2S content? • Inert Gas composition? • Sweating? • Temperature? • Frequency of operations • Tank cleaning effects?

  9. Future Work Plan • Develop test (equivalent to annex I) for type approval of coatings • Gather information regarding in service experience on compatibility/incompatibility • Agree the definition for the areas to be coated • Agree how to manage the PMA • Submit a industry standard to IMO that can be used in conjunction with the proposed EU submission.

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