Permanent repair to a live subsea pipeline

Java Sea, Indonesia



The state-owned PGN (Perusahaan Gas Negara) supplies over 80 million customers with gas in Indonesia. One of their major offshore pipelines – transporting gas to Jakarta – showed signs of leakage during an inspection in 2013, and it was temporarily fixed with a clamp. A permanent repair was still required for this critical pipeline. In 2014, jointly with a renown Dutch professional diving firm, IRM Systems developed a suitable repair methodology and executed the permanent repair.

Project Challenges

The repair had to be completed without shutting the pipeline down. The pipeline was at a depth of 30 metres, and required saturation diving services for a month. IRM Systems developed a methodology to stop the leakage of the temporary pipeline repair clamp in place. Based on extensive analysis on bending moments at the intersection, a permanent repair by means of a welded structural sleeve was performed, ensuring the long-term integrity of the remainder of the pipeline’s lifetime.

Added value

If you have a specific place to do a repair, like this one, you have to really calculate what kind of bending moments are exercised on the pipeline.

With our expertise in non-standard issues we were able to make sure that the repair mechanism was strong enough to withstand the stress caused at the intersection.




IRM Systems B.V.

Maerten Trompstraat 25

2628RC Delft

The Netherlands

📞  +31 (0) 15 20 23 006


IRM Systems UKWA

1 Berry Street

Aberdeen AB25 1HF

United Kingdom

📞   +44 (0) 122 484 5555