OCIMF - Guidelines for the Purchasing and Testing of SPM Hawsers, 2nd Edition 2025

Introduction

Contents

Purpose and scope

Glossary

Abbreviations

Bibliography

List of figures

Section one

General practices and procedures

1.1 General procedures

1.2 Purchasing and testing - process overview

1.3 Compliance with OCIMF Guidelines for the Purchasing and Testing of SPM Hawsers

1.4 OCIMF Compliance Certificate

1.5 Other practices

Section two

Procedure for specifying hawsers

2.1 General procedures

2.2 Rope size

2.3 Rope performance

2.4 Rope construction

2.5 Rope fibre material

2.6 Hawser assembly

2.7 Eyes and thimbles

2.8 Chafe protection

2.9 Auxiliary gear

2.10 Hawser length

2.11 Marking of hawsers

2.12 Packing of hawsers

Section three

Procedure for offering hawsers

3.1 General procedures

3.2 Rope size

3.3 Rope performance

3.4 Rope construction

3.5 Rope fibre material

3.6 Hawser assembly

3.7 Marking and packing

Section four

Production of hawsers

4.1 General procedures

4.2 Product design documentation

4.3 Rope fibre material quality

4.4 Material control

4.5 Material testing

4.6 Rope production

4.7 Splice quality

4.8 Hawser assembly, eyes, thimbles, chafe protection and auxiliary gear

4.9 Identification and labelling of rope

4.10 Packing

Section five

Inspection of finished hawsers

5.1 General procedures

5.2 Establishment of inspection criteria

5.3 Manufacturing quality

5.4 Application of reference load

5.5 Inspection of sample of rope section

5.6 Verification of rope strength

5.7 Fibre material identification testing

5.8 Inspection at reference load

5.9 Inspection of splices

5.10 Rope quality

5.11 Eyes, thimbles, chafe protection and auxiliary gear

5.12 Markings

5.13 Packing

Section six

Production of prototype ropes

6.1 General procedures

6.2 Intent of prototype testing

6.3 Inspection by Independent Inspector

6.4 Number of tests

6.5 Prototype rope description

6.6 Test machine

6.7 New Dry Breaking Strength Test

6.8 New Wet Breaking Strength Test

6.9 Breaking strength calculations

6.10 Cyclic Load Test

6.11 Elongation measurements and extension calculation

6.12 Auxiliary gear - reserve buoyancy test

6.13 Reporting of results

Section seven

Manufacturer?s Record Book

7.1 General

7.2 Detailed rope information

7.3 Requirements for hawser Residual Strength testing

Appendices

Appendix A: Forms

Form A OCIMF Guidelines for the Purchasing and Testing of SPM Hawsers Compliance Certificate

Form B Purchase Specification Form

Form C Offer of Hawser Form

Form D-1 Yarn Specification Form

Form D-2 Rope Quality Control Checklist

Form E Inspection Checklist and Report

Form F Prototype Test Checklist and Report

Appendix B: Basic yarn testing

B1 Yarn strength and elongation

B2 Yarn shrinkage and creep

B3 Yarn-on-yarn abrasion test

B4 Fibre material identification tests

Appendix C: Example calculations

C1 Introduction

C2 Rope Size Number (section 5.5.4)

C3 Verification of rope strength (section 5.6.4)

C4 Standard Deviation (section 6.9.3)

C5 Wet Strength Ratio (section 6.9.4)

C6 Rope Strength/Size Scale Power (section 6.9.5)

C7 Determination of strengths of other rope sizes (section 6.9.6)

C8 Determination of Rope/Yarn Strength Ratio (section 6.9.7)

C9 Determination of Thousand Cycle Load Level (section 6.10.8)