Elbows fittings are used to change the direction of pipeline.  With the difference in manufacture process, there are seamless elbows & welded elbows. Compared with seamless elbows, the size for welded elbow is pretty big. They are made of cutting plates. So we will easy to see weld seam on the surface. Angles in common use include 45deg, 90deg, 180deg.

 According to bend radius,welded elbows are divided into long radius(LR) and short radius(SR). Materials of welded elbows cover carbon steel,alloy steel and stainless steel. Welded elbows are widely used in many industries, such as petroleum, chemical, power plant, shipbuiding etc.