Understanding biodegradable lubricants: An introduction to Environmentally Acceptable Hydraulic Fluids (EAHFs) in hydraulic systems offshore
- Informative Guidance
- Revision 2 - May 2026
This document provides practical guidance on selecting, converting to, and managing Environmentally Acceptable Hydraulic Fluids (EAHFs) in offshore hydraulic systems, particularly for ROVs, LARS, HPUs, and related tooling.
The document aims to help operators reduce environmental impact, meet regulatory requirements, and maintain equipment reliability when moving away from conventional mineral oils.
Contents
Preface
Glossary
Introduction
Overview of environmentally acceptable hydraulic fluids
Fluid type comparison
System compatibility and conversion guidelines
Appendix A – Fluid comparison table
Appendix B – ROV environmental oil compatibility checklist
Appendix C – Regulatory requirements
Revision
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Rev. 2 - May 2026Full document update with new terminology; title changed from Understanding biodegradable lubricants: An introduction to 'green' oil in hydraulic systems offshore
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Rev. 1.1 - February 2024Refresh of page 2, reference links and bookmarking; no change to content
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Rev. 1 - June 2020Scheduled review, some simplification but no change in meaning
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Rev. - October 2014Initial publication