Elbow is a kind of pipe fittings used for curve or bend in pipeline. Elbow is made of carbon steel or alloy steel. According to elbow's different technology, we can make seamless welded steel elbow, threaded elbow, socket elbow. And according to different usage, we classify elbow as equal elbow, reducer elbow, short radius elbow, pump elbow, forged elbow, grooved elbow, thermal insulation elbow, heat extruded elbow, heating elbow, stamping elbow, wear resistant elbow, 30 degree elbow, 45 degree elbow, 90 degree elbow, 180 degree elbow and some high pressure elbow.