IMCA Guidance on Breathing Gases for Diving

A newly published document - ‘Guidance on the provision, acceptance and handling of breathing gases for diving’ IMCA D 075 - from the International Marine Contractors Association (IMCA) aims to raise awareness of the issues that industry has faced when procuring breathing gases used for diving.

As Bill Chilton, IMCA Technical Adviser – Diving, explained: “Over the years there have been a number of incidents where divers have been injured or even killed during the course of their work after being supplied with incorrect breathing mixtures. Following recent incidents of this nature IMCA was asked by industry to assist in developing appropriate guidance designed to reduce the risk of such incidents.

A dedicated workgroup comprised of industry specialists from gas supply companies and diving contractors was set up in 2022 and, working collaboratively, the workgroup members developed the guidance now published as IMCA D 075. It is, like all IMCA documents, written by the industry for the industry.”

2 Bill Chilton H and S 2

Bill Chilton, IMCA Technical Adviser

The aims of IMCA D 075 are to provide information and guidance to IMCA diving members on:

  • Safety management to reduce risks associated with the quality of breathing gases used in commercial diving;
  • Appropriate standards for diving gas supply companies and their facilities;
  • Processes to be followed by gas suppliers when filling, mixing, and analyzing breathing gases for diving;
  • Diving gas composition standards and tolerances;
  • Port call management plans for gas transfer;
  • Processes to be followed by diving contractors when receiving and accepting breathing gases for diving; and
  • The reporting of gas supply incidents.

The appendices within IMCA D 075 contain checklists which should prove particularly useful to those involved with the provision, acceptance and handling of breathing gases for diving. Together the information contained within the new guidance document should help to eliminate incidents where incorrect breathing gas mixtures are provided.

Specific information on the Diving Committee is at www.imca-int.com/committees/diving/

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