Published: October 2021
This consolidated edition combines in one guidance manual the various sources of information necessary for assessing the condition of ballast and cargo tank structure of tankers in service, while the original manual mainly addressed the conventional single hull tanker, this revision includes IACS Recommendation No. 72: Confined Space Safe Practice – Rev.3 Dec 2018 and IACS Unified Requirements (UR) Survey and Certification: Z10.4 Hull Surveys of Double Hull Oil Tankers (Rev.16 May 2019), where changes introduced in Rev.16 are to be uniformly applied by IACS Societies for surveys commenced on or after 1 July 2020.
This revision includes IACS Recommendation No. 72: Confined Space Safe Practice – Rev.3 Dec 2018 and IACS Unified Requirements (UR) Survey and Certification: Z10.4 Hull Surveys of Double Hull Oil Tankers (Rev.16 May 2019), where changes introduced in Rev.16 are to be uniformly applied by IACS Societies for surveys commenced on or after 1 July 2020.
Table of Contents
Chapter One – Survey Preparation Guidelines
1.1 Survey Requirements
1.2 Safety and Access
1.3 Ultrasonic Thickness Determination
1.4 Technical Background for Surveys
Chapter Two – Survey Execution Guidelines
2.1 Introduction
2.2 General Planning Requirements
2.3 Structural Aspects
2.4 Risk Categories
2.5 Classification Society Surveys/IACS Unified Requirements for Hull Surveys of Double Hull Oil Tankers
2.6 Owner’s Surveys
Chapter Three – Survey Data Analysis Guidelines
3.1 Method of Assessment
3.2 Structural Integrity
3.3 Acceptance Criteria
Chapter Four – Maintenance and Repair Guidelines
4.1 General
4.2 Type of Repair
4.3 Maintenance and Repair Methods
4.4 Optimum Maintenance and Repair Strategy
Appendix I Background to Forum Activities
Appendix II IACS Unified Requirements UR Z10.4
Appendix III IACS Rec No. 72: Confined Space Safe Practice
Appendix IV Catalogue of Structural Detail Failures
Appendix V In-Service Corrosion Rate Studies
Appendix VI Structural Inspection Guidelines
Appendix VII Assessment of Existing Surface Coating Systems
