company news about Classification of elbows

　　In piping systems, elbows are pipe fittings that change the direction of the pipeline. According to the angle, there are some of the most commonly used 45° elbows, 90° elbows and 180° elbows, and other abnormal angle elbows such as 60° elbows according to engineering needs. The elbow materials are cast iron, stainless steel, alloy steel, malleable cast iron, carbon steel, non-ferrous metals and plastics.

　　According to the pipe connection methods, there are: direct welding flange connection, hot melt connection, electrofusion connection, threaded connection and socket connection, etc.

　　According to the production process, it can be divided into: welding elbow, stamping elbow, push elbow, casting elbow, butt welding elbow, etc.

　　The elbow is a commonly used connecting pipe fitting, used for the connection of the pipe bend, and used to change the direction of the pipe.

　　Other categories can be divided into: 90° elbow, right angle bend, love and bend, stamping elbow, pressed elbow, mechanical elbow, welding elbow, etc.

　　Purpose: To connect two pipes with the same or different nominal diameters, so that the wires can be turned at 90°, 45°, 180° and various degrees.

　　A bending diameter less than or equal to 1.5 times the pipe diameter belongs to an elbow, and more than 1.5 times the pipe diameter belongs to an elbow.

　　A commonly used connection pipe fitting in pipeline installation, connecting two pipes with the same or different nominal diameters to make the pipe bend at a certain angle, and the nominal pressure is 1-1.6Mpa.

　　Divided by material

　　Carbon steel: ASTM/ASME A234 WPB, WPC

　　Alloy: ASTM/ASME A234 WP 1-WP 12-WP 11-WP 22-WP 5-WP 91-WP911, 15Mo3 15CrMoV, 35CrMoV

　　Stainless steel: ASTM/ASME A403 WP 304-304L-304H-304LN-304N

　　ASTM/ASME A403 WP 316-316L-316H-316LN-316N-316Ti

　　ASTM/ASME A403 WP 321-321H ASTM/ASME A403 WP 347-347H

　　Low temperature steel: ASTM/ASME A402 WPL3-WPL 6

　　High performance steel: ASTM/ASME A860 WPHY 42-46-52-60-65-70

　　Cast steel, alloy steel, stainless steel, copper, aluminum alloy, plastic, argon leaching, PVC, PPR, RFPP (reinforced polypropylene), etc.

　　According to the production method, it can be divided into pushing, pressing, forging, casting, etc.

　　According to the manufacturing standard, it can be divided into national standard, electric standard, ship standard, chemical standard, water standard, American standard, German standard, Japanese standard, Russian standard, etc.

　　According to its radius of curvature: it can be divided into long radius elbow and short radius elbow. The long radius elbow refers to the outside diameter of the pipe whose radius of curvature is equal to 1.5 times, namely R=1.5D; the short radius elbow refers to its radius of curvature equal to the outside diameter of the pipe, namely R=1.0D. (D is the diameter of the elbow, R is the radius of curvature).

　　According to the pressure level: there are about 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; the most commonly used are STD and XS.

　　According to different shapes and uses, it can be divided into: groove elbow, ferrule elbow, double bearing elbow, flange elbow, reducer elbow, seat elbow, internal and external tooth elbow, stamping elbow, push System elbow, socket elbow, butt welding elbow, inner wire elbow, etc.