Classification Of Carbon Steel Elbow Varieties

Carbon steel elbows are first classified according to their curvature radius, which can be divided into long radius elbows and short radius elbows. A long radius elbow refers to a pipe with a curvature radius equal to 1.5 times the outer diameter of the pipe, i.e. R=1.5D. A short radius elbow refers to a curvature radius equal to the outer diameter of the pipe, i.e. R=1.0D. (D is the diameter of the elbow, R is the radius of curvature. D can also be expressed in multiples.) If divided by pressure level, there are approximately seventeen types, which are the same as the American pipe standards, including: Sch5s, Sch10s, Sch10, Sch20, Sch30, Sch40s, STD, Sch40, Sch60, Sch80s, XS; Sch80, Sch100, Sch120, Sch140, Sch160, XXS, with the most commonly used being STD and XS. According to the angle of the elbow, there are 45 ° elbows, 90 ° elbows, and 180 ° elbows. The executive standards include GB/T12459-2005, GB/T13401-2005, GB/T10752-1995, HG/T21635-1987, D-GD0219, etc.