The Trans Austria Gas (TAG) pipeline is a natural gas pipeline that leads from the Slovak-Austrian border at Baumgarten an der March to Arnoldstein in the south, near the border with Italy.

In addition, it supplies Slovenia through the SOL Pipeline System (Süd - Ost - Leitung), which branch-off at Weitendorf.

[1] The capacity of the pipeline is 41 billion cubic meters (bcm) of natural gas annually.

The construction of two additional compression stations increased the capacity to 47.5 bcm at end 2008.

Eni owns 89% of TAG and manages the pipeline, with OMV holding the remainder.