Adds details from paragraph 2 onwards

June 3 (Reuters) - Delfin Midstream said on Wednesday it has taken a positive final investment decision for the first floating liquefied natural gas (FLNG) vessel of the Delfin LNG project under development in Louisiana and offshore in the Gulf of Mexico.

Delfin FLNG 1 will be the first floating liquefaction facility in the U.S. and the largest FLNG project globally, with an expected export capacity of 4.4 million tonnes of LNG per year, the company said.

With the first vessel scheduled to begin LNG production in 2030, the company continues to diligently advance towards securing FIDs for FLNG vessels two and three over the coming year.

The development was delayed for months following an explosion on a pipeline near Holly Beach and Johnson Bayou in Louisiana expected to supply gas to the facility.

In March, Eduard Ruijs, head of investment at Vitol, which holds a stake in the project, told Reuters the Delfin development would have secured financial approval earlier if not for the pipeline blast.

The project is backed by long-term LNG sales agreements with leading global energy companies, including Vitol, Expand Energy EXE.O, Centrica CNA.L and Gunvor.