904L Duplex Stainless Steel Elbow Manufacturer

Bend classification is based on its radius of curvature, which can be categorized into long-radius bends and short-radius bends. Long-radius bends refer to those with a radius of curvature equal to 1.5 times the pipe's outer diameter, i.e., R = 1.5D. Short-radius bends refer to those with a radius of curvature equal to the pipe's outer diameter, i.e., R = D. In the formula, D represents the bend diameter, and R represents the radius of curvature. When classified 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, with STD and XS being the most commonly used. By bend angle, there are 45-degree bends, 90-degree bends, and 180-degree bends. This results in a wide variety of bend types. When placing an order, the specification is often indicated as follows: for example, "LR STD 90o 8" denotes a long-radius bend with a STD pressure class, a 90-degree angle, and 8" diameter; or "SR XS 45o 4" indicates a short-radius bend with an XS pressure class, a 45-degree angle, and 4" diameter. The above outlines the general classification of bends.