(1) Butt welding elbows can be divided into long radius butt welding elbows and short radius butt welding elbows according to their radius of curvature. The radius of curvature of the long radius butt welding elbow is equal to 1.5 times the outer diameter of the pipe, that is, R=1.5D. The radius of curvature of the short radius butt welding elbow is equal to the outer diameter of the pipe, that is, R=1D. In the formula, D is the diameter of the butt welding elbow, and R is the radius of curvature. If there is no special description, the 1.5D elbow is generally used.
(2) According to the pressure level, there are about seventeen kinds, 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, of which the most commonly used are STD and XS.
(3) According to the angle of the elbow, there are 45-degree butt-welding elbows, 90-degree butt-welding elbows, 180-degree butt-welding elbows and other elbows with different angles.
(4) Materials are: carbon steel, alloy steel and stainless steel.
Post time: Jul-24-2022