Failure of master link during subsea lifting operations
- Safety Flash
- Published on 8 July 2014
- Generated on 17 November 2025
- IMCA SF 11/14
- 1 minute read
An incident has been brought to IMCA’s attention in which a master link (lifting ring) fitted to a 10t air lift bag failed in use during subsea lifting. This style of master links are also fitted to 10t water load bags.
Overall size of the master link
Part number embossed on the flat section
Part number embossed on the flat section
What happened?
Unique Seaflex has identified the batch number of the parted master link. However, as these links are interchangeable, as a precaution, the company has decided to advise all owners or users of 10t air lift bags and 10t water load bags to inspect the master links fitted to their bags and quarantine any products marked with the following two possible lot numbers (which can be found embossed within the pressed section opposite the weld in the centre of one long side):
- IWA
- LWA
Members using 10t air lift bags or 10t water load bags fitted with a red master link marked IWA or LWA should contact Unique Group (info@uniquegroup.com) for further information in regards to ring change-out and replacement instructions.
Related safety flashes
-
IMCA SF 07/14
13 May 2014
-
IMCA SF 12/11
1 November 2011
IMCA Safety Flashes summarise key safety matters and incidents, allowing lessons to be more easily learnt for the benefit of the entire offshore industry.
The effectiveness of the IMCA Safety Flash system depends on the industry sharing information and so avoiding repeat incidents. Incidents are classified according to IOGP's Life Saving Rules.
All information is anonymised or sanitised, as appropriate, and warnings for graphic content included where possible.
IMCA makes every effort to ensure both the accuracy and reliability of the information shared, but is not be liable for any guidance and/or recommendation and/or statement herein contained.
The information contained in this document does not fulfil or replace any individual's or Member's legal, regulatory or other duties or obligations in respect of their operations. Individuals and Members remain solely responsible for the safe, lawful and proper conduct of their operations.
Share your safety incidents with IMCA online. Sign-up to receive Safety Flashes straight to your email.