Classification of elbow

• Classification of elbow

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  1. Material of elbow is divided into carbon steel, cast steel, alloy steel, stainless steel, copper, aluminum alloy, etc.
  The production method can be divided into pushing, pressing, forging, casting, etc.(now it is usually pure forging).
  3. Manufacturing standards can be divided into: national standard, electric standard, water standard, American standard, German standard, daily standard, etc.
  4 according to its radius of curvature points: can be divided into long radius elbow and short radius elbow. Long radius elbow refers to its radius of curvature is equal to 1.5 times the outer diameter of tube, R = 1.5 d. short radius elbow refers to its radius of curvature is equal to the pipe diameter and R = 1.0 D. (D bend diameter, R for the radius of curvature).
  5. According to the pressure grade, there are about 17 kinds of pipes, which are the same as the American pipe standard, including :Sch5s, Sch10s, Sch10, Sch20, Sch30, Sch40s, STD, Sch40, Sch60, Sch80s and XS.Sch80, SCH100, Sch120, Sch140, Sch160, XXS;The two most commonly used are STD and XS.