Alloy steel pipe manufacturers shelf high-pressure steel pipe
The biggest advantage alloy steel pipe can be 100% recycled, environmentally friendly, energy-saving, resource conservation national strategy, national policy to encourage the expansion of the application of high-pressure alloy tube. Currently the proportion of the total accounted for our alloy steel pipe consumption in developed countries is only half the field of alloy tube using expanded to provide a broader space for the development of the industry. According to China Association of alloy steel pipe branch expert groups, the average annual growth of China's future demand for long products of high alloy pipe up to 10-12%. Alloy steel pipe is produced in accordance with the material (That is, material) to define the name suggests is made alloy tubes; and seamless steel pipe in accordance with the production process (with seam seamless) to define, and different from Seamless pipe is a seam, including the Longitudinal and spiral. Alloy tube with a hollow cross section, a large number of used pipes conveying fluids, such as transportation of oil, gas, gas, water and some solid materials, pipes and so on. Compared to other alloy steel pipe and solid steel bar, the same torsional strength in bending, lighter, alloy steel pipe is an economic cross-section steel, widely used in the manufacture structural parts and mechanical parts, such as drill pipe, automotive transmission shafts, bicycle frames and construction using steel scaffolding. Alloy steel pipe manufacturing annular parts, can improve material utilization, simplify the manufacturing process, saving materials and processing time, such as bearing rings, jack sets, has been widely used to manufacture steel. Steel pipe or a variety of conventional weapons indispensable material, barrel, barrel would have to make steel.
Different cross-section shape steel pipe can be divided into tube and shaped tubes. Since in perimeter of equal conditions, the largest area of ??a circle, with the circular tube can carry more fluid. In addition, the circular cross section to withstand internal or external radial pressure, the force is uniform, so the vast majority of pipe is pipe. With the state to ferrite-based steel pipe. Chromium content of 11% to 30%, with a body-centered cubic crystal structure. Such steel generally does not contain nickel, sometimes also contain a small amount of Mo, Ti, Nb wait until element, such as steel with a large thermal conductivity, expansion coefficient, good oxidation resistance, excellent resistance to stress corrosion, etc., used for the manufacture Weathering , steam, water and oxidizing acid corrosion of components. Such steel pipe plastic poor existence, ductility and corrosion resistance after welding and other shortcomings significantly reduced, thus limiting its application. Refining technology (AOD or VOD) applications enable carbon, nitrogen and other elements greatly reduce the gap, thus making this type of steel is widely used. Steel pipe Austenite and ferrite each account for about half of the steel pipe. In the case of containing a lower C, Cr content of 18% ~ 28%, Ni content of 3% to 10%. Some steel further contains Mo, Cu, Si, Nb, Ti, N and other alloying elements. Both austenitic class steel and ferritic alloy steel pipe features, higher compared with the ferrite, ductility, toughness, no temperature brittleness, resistance to intergranular corrosion and welding performance are significantly improved, while also maintaining a ferritic steel tubes 475 ℃ brittle and high thermal conductivity, with superplastic characteristics. Compared with the austenitic steel pipe, high strength and resistance to intergranular corrosion and chloride stress corrosion has significantly improved. Duplex steel pipe has excellent resistance to pitting corrosion, but also a section of nickel alloy steel pipe.
Source:http://www.jnsteelpipe.com/
