Butt welding elbow is a long steel strip with hollow section and no joint around it. The steel pipe has a hollow section and is widely used for conveying fluid pipelines, such as conveying oil, natural gas, gas, water and some solid materials. Compared with solid steel such as round steel, steel pipe has the same bending and torsional strength and lighter weight. It is a kind of economic cross section steel and is widely used in the manufacture of welding elbows of structural parts and mechanical parts, such as oil drill pipe, automobile drive shaft, bicycle frame and steel scaffolding used in construction.Since the circle area is the largest with equal perimeters, more fluid can be transported to butt weld elbows with circular tubes. In addition, the annular section under internal or external radial pressure, the force is more uniform, so the vast majority of steel tubes are round. The output flow of seamless butt welding elbow is large and suitable for all walks of life. It is convenient to connect with other steel tubes.Butt welding elbow not only saves space, reduces weight, but also ensures that the joint will not leak and has good sealing performance. The size of the compact flange is reduced by reducing the diameter of the seal, which will reduce the section of the sealing face. Second, the flange gasket has been replaced by a seal ring to ensure that the seal faces the sealing face. The B value of 45 degree elbow is the structural size, mainly for the convenience of pipeline designers.
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