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In the actual production, different elements are added to the eccentric head to achieve different functions and strengths, and certain production standards and methods are used to add it, and it has certain performance in its use. The characteristic of eccentric size head is that the strength is significantly higher than that of carbon steel with the same carbon content, and it has good toughness and plasticity, good weldability and corrosion resistance, etc. In order to improve and enhance the performance of steel, on the basis of carbon steel Adding other alloying elements, such as silicon, manganese, chromium, nickel, tungsten, vanadium, titanium, etc., this kind of steel is called alloy steel.

The eccentric size head has different properties according to the addition of alloy elements, such as high wear resistance, corrosion resistance, low temperature resistance, high magnetic properties and other good special properties. The middle of the eccentric size head is the main pipe section, and the two ends are eccentric Straight pipe section, there is an eccentric diameter-reducing transition section between the main pipe section and the eccentric straight pipe section, and the bottom line of the eccentric head remains unchanged; the preparation method of the eccentric head is to use multiple sets of grading molds to directly perform eccentric diameter reduction on the metal pipe , first leave the main pipe section in the middle of the whole metal pipe, and then use multiple sets of grading dies to press the mold according to the requirements of the diameter change angle, and press it step by step. The eccentric big and small ends processed by the method of the present invention, the whole eccentric big and small ends There is no weld on the top; the eccentric head is used as a special pipe for highly corrosive liquids, which can prolong the service life of the eccentric head, especially for the shell of the eccentric water distributor in the well, because there is no weld, it will not Corrosion and cracking at the welding joint; the production process is flexible, and the eccentric head with any diameter and any length of eccentric straight pipe section can be processed.

The size of the eccentric head is different for the connected pipes, and the suitable industries are also different. In industries such as electric power, mining, and metallurgy, the transportation and output of materials are carried at close distances and under high pressure. The pipelines are under considerable pressure and are subject to severe wear and tear. It is difficult for a single-material pipeline to meet this working condition. Requirements, especially pipe fittings such as elbows, concentric big and small heads, stamping elbows, etc., in consideration of their safety and service life, the focus is on improving the toughness, impact resistance, and wear resistance of the pipeline lining. At the same time, the overall strength of the pipe and elbow should also be considered.