Borusan Birlesik Boru Fabrikalari Sanayi ve Ticaret AS engages in the manufacture and sale of welded steel pipes and plastic pipes. It operates through Steep Pipe and Engineering segments. The Steel Pipe segment manufactures and sell longitudinally and spirally welded steel pipes and pipes. The Engineering segment is comprised of the design, production and maintenance of machinery, equipment, and spare parts and also designs and conduct investment projects. The company was founded by Asim Kocabiyik on July 12, 1958 and is headquartered in Salipazari, Turkey.