The device is a dedicated non-standard equipment designed for the production of equal-diameter steel pipes, specifically for manufacturing bent steel pipes of various diameters, particularly large-diameter ones. It enables continuous production of bent steel pipes with multiple segments and varying curvature radii. Technical specifications including the diameter, wall thickness, and curvature radius range of the bent pipes are all specified by the user. The equipment manufacturer designs and manufactures the device according to the user's requirements.