3 Background
Clasification Society 2024 - Version 9.40
Statutory Documents - IMO Publications and Documents - Resolutions - Maritime Safety Committee - Resolution MSC.288(87) – Performance Standard for Protective Coatings for Cargo Oil Tanks of Crude Oil Tankers – (Adopted on 14 May 2010) - Annex – Performance Standard for Protective Coatings for Cargo Oil Tanks of Crude Oil Tankers - Annex 1 – Test Procedures for Coating Qualification for Cargo Oil Tanks of Crude Oil Tankers - 3 Background

3 Background

 It is acknowledged that a crude oil cargo tank on board a ship is exposed to two very different environmental conditions.

  3.1 When the cargo tank is loaded there are three distinct vertical zones:

  • .1 Lowest part, and horizontal parts on stringer decks, etc., exposed to water that can be acidic and sludge that can contain anaerobic bacteria.

  • .2 Mid part where the oil cargo is in contact with all immersed steel.

  • .3 Vapour space where the air is saturated with various vapours from the loaded cargo tank such as H2S, CO2, SO2, water vapour and other gases and compounds from the inert gas system.

  3.2 When the tank is in a ballast condition:

  • .1 Lowest part and horizontal parts on stringer decks, etc., exposed to cargo residues and water that can be acidic and sludge that can contain anaerobic bacteria.

  • .2 Tank space where the air contains various vapours from the crude oil residues such as H2S, CO2, SO2, water vapour and other gases and compounds from the inert gas system.

Parent topic: Annex 1 – Test Procedures for Coating Qualification for Cargo Oil Tanks of Crude Oil Tankers
Copyright 2022 Clasifications Register Group Limited, International Maritime Organization, International Labour Organization or Maritime and Coastguard Agency. All rights reserved. Clasifications Register Group Limited, its affiliates and subsidiaries and their respective officers, employees or agents are, individually and collectively, referred to in this clause as 'Clasifications Register'. Clasifications Register assumes no responsibility and shall not be liable to any person for any loss, damage or expense caused by reliance on the information or advice in this document or howsoever provided, unless that person has signed a contract with the relevant Clasifications Register entity for the provision of this information or advice and in that case any responsibility or liability is exclusively on the terms and conditions set out in that contract.