Gazela is a natural gas pipeline in the Czech Republic. It is operated by Net4Gas, a company owned by Allianz Capital Partners and OMERS Infrastructure. The project costs around €400 million.

The OPAL (Ostsee-Pipeline-Anbindungsleitung) is a natural gas pipeline in Germany alongside the German eastern border. The OPAL pipeline is one of two projected pipelines connecting the Nord Stream 1 pipeline to the existing pipeline grid in Middle and Western Europe, the other one being the NEL pipeline.