An elbow is a pipe fitting that changes the direction of a pipeline. According to the angle, there are three most commonly used types: 45 °, 90 °, and 180 °. In addition, other abnormal angle elbows such as 60 ° are also included according to engineering needs. The materials for elbows include cast iron, stainless steel, alloy steel, malleable cast iron, carbon steel, non-ferrous metals, and plastics. The methods of connecting with pipes include direct welding (the most commonly used method) flange connection, hot melt connection, electric melt connection, threaded connection, and socket connection. According to the production process, it can be divided into welded elbows, stamped elbows, push made elbows, cast elbows, welded elbows, etc. Other names: 90 degree bend, right angle bend, love bend, etc.
Elbow is a commonly used connecting pipe fitting in plumbing installation, used for connecting pipes at bends and changing the direction of pipes.
Other names: 90 ° elbow, right angle elbow, Love bend, stamped elbow, pressed elbow, mechanism elbow, welded elbow, etc.
Purpose: To connect two pipes with the same or different nominal diameters, allowing the pipeline to make turns of 90 °, 45 °, 180 °, and various degrees.
A bending radius less than or equal to 1.5 times the pipe diameter is considered an elbow, while a radius greater than 1.5 times the pipe diameter is considered a bend
technical requirement
1. Due to the fact that most pipe fittings are used for welding, in order to improve welding quality, the ends are chamfered, leaving a certain angle and with certain edges. This requirement is also quite strict, with regulations on how thick the edges are, what the angle is, and the deviation range. The surface quality and mechanical properties are basically the same as pipes. For the convenience of welding, the steel grade of the pipe fittings is the same as that of the connected pipes.
2. All pipe fittings must undergo surface treatment, with the oxide scale on the inner and outer surfaces sprayed off by shot blasting, and then coated with anti-corrosion paint. This is for export needs, and in addition, it is necessary to do this work domestically to facilitate transportation and prevent rust and oxidation.
3. The requirement for packaging is that for small pipe fittings such as exports, wooden boxes with a capacity of approximately 1 cubic meter are needed. It is stipulated that the number of bends in such boxes should not exceed one ton. This standard allows for sets, with larger sets being smaller, but the total weight should generally not exceed one ton. For large items, they must be individually packaged, such as 24 inch ones that must be individually packaged. Another thing is packaging labeling, which should indicate size, steel grade, batch number, manufacturer's trademark, etc.