Welded elbows, forged elbows, cast elbows, etc., can be categorized according to the production process.
Divided by material: carbon steel, cast steel, alloy steel, stainless steel (304, 316, 310, 321, 301), copper, aluminum alloy, etc. (However, the small wooden factories all use solid forgings.)
Manufacturing methods include: extrusion, pressing, forging, casting, etc. (Nowadays, it's generally pure forging.)
304 stainless steel elbows can be further categorized into equal diameter elbows and unequal diameter elbows. Equal diameter elbows are used to connect pipes with the same outer diameter, while unequal diameter elbows are used to connect pipes with different outer diameters.
Manufacturing standards include: National Standard, Electrical Standard, Water Standard, American Standard, German Standard, Japanese Standard, etc.
Curvature Radius Classification: They can be divided into long-radius elbows and short-radius elbows. Long-radius elbows refer to elbows where the curvature radius is 1.5 times the outer diameter of the pipe, i.e., R=1.5D. Short-radius elbows refer to elbows where the curvature radius is equal to the outer diameter of the pipe, i.e., R=1.0D. (D is the elbow diameter, R is the curvature radius.)
By pressure class: 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; among which, STD and XS are commonly used.
