Loose-type steel flange for connecting pipelines, has rotationally symmetric outer contour, where flange is cut along symmetric axis to obtain meander-shaped folded profile cross section that begins and ends at inner diameter of flange

摘要

The flange has a rotationally symmetric outer contour with boreholes that are distributed in a periphery, where axes of the boreholes lie parallel to a rotationally symmetry axis. The flange is cut along the rotationally symmetric axis to obtain a meander-shaped folded profile cross section. The profile cross section has a fold, where the profile begins and ends at the inner diameter (6) of the flange. The axial length of the flange at the inner diameter is greater than the axial length of the flange at the outer diameter (5).