RIO DE JANEIRO, April 28 (Reuters) - Brazil's state-owned oil company Petroleo Brasileiro SA has approved the sale of its remaining 10% stake in the NTS gas pipeline for 1.8 billion reais ($337 million) to Brookfield and Itausa SA, the company said in a note.

Petrobras, as the Rio de Janeiro-based firm is known, will receive 1.5 billion reais, the company said, after dividend payments and contract adjustments.

($1 = 5.3425 reais) (Reporting by Sabrina Valle; Editing by Christian Schmollinger)