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The process and welding requirements of the elbow
Sep 22, 2017

Elbow is mainly used in the pipeline system. The elbow is mainly used to change the direction of the pipe fittings. In accordance with its angle, it can be divided into 45°,90°and 180°.which are the most commonly used. There are also 60°and other non-normal angle which are effectively according to the project need.  
In the process of making the material, there are malleable cast iron, carbon steel, cast iron, stainless steel, nonferrous metal ,plastic and so on. There are hot melt connection, fused connection, direct welding and flange connection when it used to connect with the pipe. According to its production process, it can be divided into casting elbow, butt welding elbow, welding elbow, elbow and push elbow and so on.
Elbow fitting is mainly used to connect two nominal diameter of the same or different pipes in use, make the pipe turn for 90 °, 45 °,180 ° and various degrees .The bending radius less than or equal to 1.5 times of the caliber is below and more than 1.5 times of the caliber belongs to the siphonium. It is a commonly used pipe fittings in the pipe laying.
In the process of processing elbow pipe joint, because it is mostly used for welding, in order to effectively improve the welding quality in use, the production's telos all need to be made into groove, with a certain angle and side. This requirement is also much strict. How thick the side is, how much the angle is and the deviation range all have prescriptions. The surface quality and mechanical properties are basically the same as the pipe. For easy welding, the pipe is the same as the steel of the pipe being connected.


Stainless steel bend with three angles

All the pipe fittings have to go through the surface treatment. The inside and iron scale is eliminated by the shot peening, and then coated with anti-corrosion paint. This is for export needs. Moreover, in order to facilitate the transport and prevent corrosion oxidation, it is necessary to do this work.

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