The guidelines focus on the IACS Member Societies' survey procedures but may also be useful in connection with survey/examination schemes of other regulatory bodies, owners and operators. The manual includes a review of survey preparation guidelines, which cover the safety aspects related to the performance of the survey, the necessary access facilities, and the preparation necessary before the surveys can be carried out.
The survey guidelines encompass the different main structural areas of the hull where damages have been recorded, focusing on the main features of the structural items of each area..
An important feature of the manual is the inclusion of the section, which illustrates examples of structural deterioration and damages related to each structural area and gives what to look for, possible cause, and recommended repair methods, when considered appropriate..
This manual has been developed using the best information currently available. It is intended only as guidance in support of the sound judgment of Surveyors, and is to be used at the Surveyors' discretion..
Surveyors dealing with single hull oil tankers should be encouraged to read the 'Guidance Manual for Oil Tankers' by Tanker Structure Cooperative Forum.
IACS Common Structural Rules for Tankers implemented from April 2006 have been developed in response to a consistent and persistent call from industry for an increased standard of structural safety. This has been achieved through enhancing the design basis and applying engineering first principles. The development of the CSR for Tankers included review of existing Rules, new development using a first principle approach, application of the net thickness philosophy, an enhanced design environment and a longer life ie 25 years North Atlantic. These Rules are applicable to double hull oil tankers exceeding a length of 150 metres.
Note: Throughout this document reference is made to various IACS Unified Requirements (UR), Procedural Requirements (PR) and Recommendations. All URs and PRs and key recommendations are available from the IACS website
1 Introduction 1
2 Classification Survey Requirements 7
2.1 General 7
2.2 Annual surveys 8
2.3 Intermediate surveys 8
2.4 Special surveys 9
2.5 Dry-docking (bottom) surveys 9
2.6 Damage and repair surveys 10
3 Technical Background for Surveys 13
3.1 General 13
3.2 Definitions 13
3.3 Structural load descriptions 15
3.4 Structural defects, damages and 16
deterioration
3.5 Structural detail failures and repairs 36
4 Survey Programme, Preparationand Execution 37
4.1 General 37
4.2 Survey programme 37
4.3 Survey planning meeting 39
4.4 Conditions for survey 39
4.5 Access arrangement and safety 40
4.6 Use of boats and rafts 42
4.7 Personal equipment 44
4.8 Thickness measurement and fracture 45
detection
4.9 Survey at sea or at anchorage 46
4.10 Documentation on board 46
4.11 Reporting and evaluation of survey 47
5 Structural Detail Failures and Repairs 51
5.1 General 51
5.2 Actions to be taken by the classification 51
society when fatigue failures have been
identified
5.3 Catalogue of structural detail failures and 52
repairs
1 Bilge hopper 53
2 Wing ballast tank 73
3 Bottom ballast tank 87
4 Web frames in cargo tanks 103
5 Transverse bulkheads in cargo tanks 113
6 Deck structure page 127
7 Fore and aft end regions 139
8 Machinery and Accommodation Spaces 165
Title: Double Hull Oil Tankers Guidelines for Surveys, Assessment and Repair of Hull Structures IACS
Product Code: 4383
ISBN: ISBN 13: 978-1-85609-349-1 (9781856093491), ISBN 10: 1-85609-349-2 (1856093492)
Published Date:
Weight: 0.70 kg
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