INTERTANKO Guidance Manual for Maintenance of Tanker Structures

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Number of Pages:
Published Date:
January 2013
Book Height:
300 mm
Book Width:
210 mm
0.4 kg
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This publication covers the processes of planning, inspecting and repairing steel tanker structures and any protective coatings or protection systems. The practices and procedures described can be applied to both single and double hulled tankers and recommendations apply to oil tankers of any size and configuration.

This publication outlines key considerations for tanker inspections, from preparation and execution to result analysis. It also explains the causes, types and control of tanker corrosion. Guidance is informed by, though does not fully meet, requirements of the ISM Code. The manual offers methods by which a systematic maintenance programme can be established for tanker structures.

Chapter 1 Introduction

Chapter 2 Regulatory Requirements for Maintenance
2.1 Introduction
2.2 International Maritime Organization Conventions
2.3 Classification Rules

Chapter 3 Review of Typical Defects
3.1 Corrosion

3.2 Structural Elements Important for Global Strength
3.3 Local Strength Issues
Chapter 4 Inspection and Maintenance Objectives
4.1 Benefits and Challenges
4.2 Vessel Age, Design, Operational Profile and Cargoes Factors affecting Scope of Inspection
Chapter 5 Inspection Programmes
5.1 The Inspection and Maintenance Plan (IMP)
5.2 Development of the Inspection and Maintenance Plan (IMP)
5.3 Inspection Preparation
5.4 Inspection Execution
5.5 Inspection Reports
5.6 Inspection Result Analysis
5.7 Acceptance Criteria
5.8 Revision of IMP

Chapter 6 Maintenance and Repair of the Hull Structure
6.1 Scope
6.2 General Requirements
6.3 Steel Repair Practice and Quality Standard

Chapter 7 Protection Against Corrosion
7.1 The Causes and Types of Corrosion
7.2 Corrosion Control
7.3 Composite Systems – Brief Overview
7.4 Specific Shipboard Applications and Conditions
7.5 Cathodic Protection Systems
7.6 IACS Guidelines for In Service Monitoring Reports
7.7 Repairs In Service – In Service Maintenance of Coating Systems
Appendix 1 Pitting Intensity Diagrams

Appendix 2 Example of an Inspection and Maintenance Plan, including Sample Report Forms for Copying

Appendix 3 Designing for Ease of Inspection and Maintenance
Appendix 4 Examples of Permanent Means of Access
Appendix 5 List of Standards in Preparation and Coating
Appendix 6 Definition of ‘Areas under Consideration’

The Tanker Structure Co-operative Forum (TSCF) is an informal technical body whose membership is voluntary and comprised of Oil Companies, Independent Owners/Operators and Classification Societies who will actively contribute to the TSCF’s Mission.

The mission of the TSCF is to advance maritime safety through improvements in the design and maintenance of tanker structures. This is achieved by sharing technical knowledge and experience in order to gain a better understanding of the safety performance of tanker structures in service. Specific topic areas of interest include corrosion, structural defects, inspection procedures, and criteria for determining renewal of damaged or corroded structure.

The TSCF is committed to sharing accumulated experience on tanker structures with the marine industry. This is achieved through prompt public release of technical manuals and information papers, and proceedings of TSCF Shipbuilder’s Meetings.


INTERTANKO (the International Association of Independent Tanker Owners) is a trade association that has served as the voice for independent tanker owners since 1970, representing the interests of its Members at national, regional and international levels.

The organisation champions an industry dedicated to support global energy networks by delivering safe, efficient and environmentally sound transport services.

INTERTANKO actively works on a wide range of operational, technical, legal and commercial issues affecting tanker owners and operators around the world. It draws on regular and direct contact with its Members and other industry stakeholders to develop and disseminate information and best practice, essential to the tanker industry.

Number of Pages:
Published Date:
January 2013
Binding Format:
Book Height:
300 mm
Book Width:
210 mm
0.4 kg