Welded elbow are elbow, merely stamping elbow, elbow cold, some elbow different production process, welding elbow not only greatly save a lot of space, reducing the number of weight, and more It is important to ensure that the joint position of the leak problem does not occur, so welded elbow would have good sealing performance, why compact flange size will be reduced, due to the reduced diameter of the seal, which will reduce sealing surface of the interface that will reduce the size of compact flanges, secondly, flange gasket sealing ring has been replaced, in order to ensure the sealing face matches the sealing surface, the 45 degree elbow welded structure of B is size, mainly to bring convenience to the pipeline design, reduce unnecessary trouble, welded elbow easier to use. What welded elbow sealing principle is: the sealing surface of each squeeze two bolts so the formation of compression flange gasket seal, seal damage. But it has also led to simultaneously form a seal, in order to better maintain the seal on To maintain the great force of the bolt, so do the larger bolts, welded elbow is used to bend pipes, for changing the direction of the pipe. Welded elbow can not for very many, can be divided according to the angle of 45 degrees elbow butt, butt elbow 90 degrees, 180 degrees welded elbow. It is more commonly used three angles welded elbow, which can be produced according to the production of construction sites, installation required, can be divided according to the material welded elbow, stainless steel welded elbow, carbon steel welded elbow, alloy steel welding elbow, and so there are a lot of