UOE is a kind of steel tube molding mode: molding the flat-panel to
a U shape with a press first, then to an O shape, welding it, and
expanding the diameter mechanically at last. It is featured by
protection of materials, high molding rate, and effective guarantee
of higher mechanical property of steel tubes made of same
materials. UOE longitudinal seam double-sided submerged arc welded
steel tubes, with high strength, high toughness, high tensile
strength, high corrosion resistance and acid resistance, can be
used for undersea petroleum and gas pipelines, land petroleum and
gas pipelines in severe cold areas and places with big fall, and
coal slurry and ore slurry pipelines. This kind of steel tubes is
widely used in important oil and gas pipelines in the globe.