Elbow is a steel molding or by forging molding elbow, elbow and the connection method is through the use of heat resistance steel pipe butt welding, the two workpiece along the entire face and welded together, usually have 2 kinds of resistance welding and flash butt welding method, high productivity, easy to automate, so has been obtained a wide range of applications. Butt welding elbow according to the different materials are divided into carbon steel, alloy steel and stainless steel elbow; according to the angle difference, generally divided into 45 degrees elbow, 90 degree elbow, 180 degree butt welding elbow, etc.. Elbow is often used in strip steel, profiles, wire, steel, steel, steel pipe, boiler oil and natural gas transport pipeline connection; and butt welding automobile wheel rim for bicycle and motorcycle rim butt welding, various ring parts link; work tool of high speed steel and carbon steel in the tail of the welding, exhaust valve for internal combustion engine the head and the tail of the welding, butt welding aluminum conductive joint, can save precious metals, improve product performance, steering axle housing and rear axle shell butt welding; butt welding rod, the rod and a variety of special parts, welding, rolling, forging, stamping simple welding or machining parts into complex parts

The production of carbon steel elbow has generally undergone a path from extensive to intensive, from complex, stupid, heavy to simple and convenient, from workshop production to factory production. Now, to carry on the analysis from the reform process of carbon steel elbow production equipment, in the global scope, due to the impact of the steel market in the steel market is still in the doldrums of the case, carbon steel elbow exit will be some resistance, have some adverse effects on the carbon steel elbow of domestic market price stability.