Mannesmann pipe refers to steel pipes manufactured by the German industrial conglomerate, Mannesmann, which was established in 1890 as a manufacturer of steel pipes. Mannesmann Line Pipe GmbH is a specialist for longitudinally HFI-welded steel tube and pipe with ODs from 114.3 to 610.0 mm (4½" - 24") . The Mannesmann brand of the Salzgitter Group has been synonymous with the innovative and sustainable manufacture of seamless and welded steel tube and pipe on three continents for more than 130 years. Borusan Mannesmann Pipe U.S. is an award-winning steel pipe manufacturer based in Baytown, Texas, and produces top-quality steel pipe products, including OCTG and line pipe products. Borusan Mannesmann has more than 65 years of experience in pipe manufacturing and manufactures more than 4,000 product varieties.