How Seamless Elbow and Welded Elbow Made
Seamless elbow is manufactured by the seamless steel pipe, through hot push, press or extrusion processes, no seam on the elbow body. Welded elbow is manufactured by welded steel pipe, same processes with seamless elbow.But there is a seam on the elbow body.
How to make seamless elbow
The production of seamless elbow mainly adopts the hot push technology. Hot push elbow forming technology is to use special elbow push system core machine, mold and heating device, to set on the mould of billet in pushing forward movement, under the impetus of the machine in motion is heated and hole enlargement and forming process. Hot push elbow deformation characteristics are based on volume before and after plastic deformation rule of metal materials determine the pipe diameter, pipe diameter elbow diameter, through the core module and control the deformation of the process, make the inner arc compressed metal flow, the compensation to other parts of the thinned by hole diameter, wall thickness uniform angle is obtained.
Hot push elbow forming technology has a good appearance, uniform wall thickness and continuous operation, suitable for the characteristics of mass production, thus become the main forming methods of carbon steel, alloy steel elbow, and also the application in some of the specifications of the stainless steel elbow forming.
How to make welded elbow
The raw materials for welded elbow are welded steel pipe and iron plates. It is also used hot push technology to produce elbows with welded steel pipe. Normally, elbow diameter below DN600 is produced by steel pipe. Diameter more than DN600 requires steel plate production. The manufacturing processes first bending the steel plate, then welded into circular, square and other shapes. Welded steel elbow has the characteristics of high production efficiency, low cost and saving material.
The reason why most of the people prefer seamless elbows over welded elbows is that seamless elbows can withstand extremely high pressure without cracking. But the seam or welded pipes cannot do the same as the welded points are vulnerable to cracking up under high pressure. Furthermore, it is very easy to accurately calculate the pressure of seamless elbows. Seamless elbows are also thinner and lighter than welded ones, and they also have uniformity of shape as they are made up of uniform extrusion of an alloy.
http://www.xysteelpipe.com/info/How-Seamless-Elbow-and-Welded-Elbow-Made-1030-1.htm
How to make seamless elbow
The production of seamless elbow mainly adopts the hot push technology. Hot push elbow forming technology is to use special elbow push system core machine, mold and heating device, to set on the mould of billet in pushing forward movement, under the impetus of the machine in motion is heated and hole enlargement and forming process. Hot push elbow deformation characteristics are based on volume before and after plastic deformation rule of metal materials determine the pipe diameter, pipe diameter elbow diameter, through the core module and control the deformation of the process, make the inner arc compressed metal flow, the compensation to other parts of the thinned by hole diameter, wall thickness uniform angle is obtained.
Hot push elbow forming technology has a good appearance, uniform wall thickness and continuous operation, suitable for the characteristics of mass production, thus become the main forming methods of carbon steel, alloy steel elbow, and also the application in some of the specifications of the stainless steel elbow forming.
How to make welded elbow
The raw materials for welded elbow are welded steel pipe and iron plates. It is also used hot push technology to produce elbows with welded steel pipe. Normally, elbow diameter below DN600 is produced by steel pipe. Diameter more than DN600 requires steel plate production. The manufacturing processes first bending the steel plate, then welded into circular, square and other shapes. Welded steel elbow has the characteristics of high production efficiency, low cost and saving material.
The reason why most of the people prefer seamless elbows over welded elbows is that seamless elbows can withstand extremely high pressure without cracking. But the seam or welded pipes cannot do the same as the welded points are vulnerable to cracking up under high pressure. Furthermore, it is very easy to accurately calculate the pressure of seamless elbows. Seamless elbows are also thinner and lighter than welded ones, and they also have uniformity of shape as they are made up of uniform extrusion of an alloy.
http://www.xysteelpipe.com/info/How-Seamless-Elbow-and-Welded-Elbow-Made-1030-1.htm
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