... to the degree of bend of 180 degrees. The shape of the bend is a 180 degree semicircle. It belongs to the ... .5D, 3D, 4D, 5D even larger bend radius. Seamless elbow 180 degrees Nominal Diameter Outside Diameter at Bevel Center to End ... Center to Center Back to Face 45°Elbow 90°Elbow 180°Elbow B A O K DN NPS Series A Series ...