US-based energy company Sempra Infrastructure, a subsidiary of Sempra, has announced that the Port Arthur Pipeline Louisiana Connector project has entered into service (Sempra Infrastructure press release, 09/06/2026).
The Port Arthur Pipeline Louisiana Connector is positioned as a key gas pipeline in the region. It is expected to enable the safe and reliable transport of 2 bcf/d (21 bcm/year) of US natural gas to international markets, by supplying gas to the Port Arthur LNG Phase 1 project. This phase has an estimated nameplate capacity of approximately 13 Mt/year and is currently under construction.
- Within Phase 1, Train 1 and Train 2 are expected to enter commercial operation in 2027 and 2028, respectively.
- In addition, the company reached a final investment decision (FID) for Phase 2 of the project in September 2025, which includes Train 3 and Train 4, together representing a combined capacity of 13 Mt/year. These units are expected to begin commercial operations in 2030 and 2031, respectively (KEI, 26/09/2026).
In addition, the pipeline enhances domestic energy infrastructure by connecting with the Gillis Hub Pipeline, a highly interconnected gas pipeline system located in the energy corridor of Southwest Louisiana. It also links to the LA Storage facility, which is currently under construction and is intended to support the movement of natural gas to and from key storage infrastructure along the Gulf Coast.
Developers are expected to add approximately 44.9 Bcf/d of new pipeline capacity in the United States between 2026 and 2027, equivalent to around 462 bcm/year, according to the EIA’s latest Natural Gas Pipeline Projects Tracker. Of this total, about 70% (31.6 Bcf/d, 325 bcm/year) is already under construction. In addition, roughly 19% (8.4 Bcf/d, 87 bcm/year) of the planned capacity additions (including the Port Arthur Pipeline, now in service) are located in Louisiana (KEI, 28/05/2026).