Carbon steel elbow English (Carbon steel elbow) can be divided into long radius elbow and short radius elbow according to its curvature radius.
A long radius elbow refers to the outer diameter of the pipe whose curvature radius is equal to 1.5 times, that is, R 1.5D.
A short radius elbow means that its curvature radius is equal to the outer diameter of the pipe, that is, R 1.0D.
(d is the diameter of the elbow and R is the radius of curvature.
D can also be expressed as a multiple.
) according to the pressure level, there are about 17 kinds, which are the same as the pipe standards in the United States. They are: Sch5s, Sch10s, Sch10, Sch20, Sch30, Sch40s, STD, Sch40, Sch60, Sch80s, XS; Sch80, Sch100, Sch120, Sch140, Sch160, XXS, are the most commonly used STD and XS.
According to the angle of the elbow, there are 45 elbow, 90 elbow and 180 elbow.
the execution standards are GB/T12459-2005, GB/T13401-2005, GB/T10752-1995, HG/T21635-1987, D-GD0219 and so on.