分類:

描述

It can be divided into pushing, pressing, forging, casting and so on.

Manufacturing standards can be divided into national standard, electric standard, ship standard, chemical standard, water standard, American standard, German standard, Japanese standard, Russian standard and so on.

According to its curvature radius, it can be divided into long radius elbow and short radius elbow. A long radius elbow is the outer diameter of a tube whose curvature radius is equal to 1.5 times, that is, R = 1.5D; a short radius elbow is the outer diameter of a tube whose curvature radius is equal to R = 1.0D. D is the diameter of elbow and R is the radius of curvature.

There are about seventeen kinds of pressure grades, which are the same as the American pipe standards: Sch5s, Sch10s, Sch10, Sch20, Sch30, Sch40s, STD, Sch40, Sch60, Sch80s, XS; Sch80, SCH100, Sch120, Sch140, Sch160, XXS; among them, STD and XS are commonly used.

According to different shapes and uses, it can be divided into groove elbow, jacket elbow, double-bearing elbow, flange elbow, different-diameter elbow, stand elbow, inner and outer teeth elbow, stamping elbow, push elbow, socket elbow, butt welding elbow, inner wire elbow, etc.