Elbow manufacturers do the use and characteristics

Elbow manufacturers do the use and characteristics of elbow

Elbow manufacturer is a kind of pipe bend.In the total pipe fittings used in the piping system, the proportion is also large, which can be about 80%.In general, different materials or wall thickness of the elbow to choose different forming process.Manufacturer commonly used seamless elbow forming process are hot push, stamping, extrusion and so on.The core die and the heating device make the billet on the die move forward under the push of the machine.Carbon steel elbow because of heating and eyeglass erosion, welding current should not be too large, less than about 20% carbon steel electrode, arc should not be too long, fast cooling between layers, with narrow weld bead is appropriate.The wear of carbon steel elbow has always been a factor affecting civilized production. With the continuous development of science and technology, the large-caliber manufacturers are also constantly innovating in materials. Cast stone, cast steel, alloy, centrifugal casting composite ceramics and other materials appear one after another.Including pipe lined with alumina ceramic, with its high wear resistance, high hardness, good oxidation resistance, corrosion resistance and high strength of high and low temperature resistance, the overseas import equipment, most of them are using the carbon steel elbow, such as huaneng dalian power plant, huaneng yueyang power plant issue, guohua sanhe power plant, datang ACTS river power plant, jiangsu port of the power plant and other factory,Carbon steel elbows are delivered with wear-resistant ceramics.Has become a widely used wear-resisting material, occupied the world special ceramic market share (wear-resisting material) about 80%.

Elbow bend deformation characteristics of factory production is according to the volume before and after plastic deformation rule of metal materials determine the pipe diameter, pipe diameter bend diameter, through the core module and control the deformation of the process, make the inner arc of the compressed metal flow, and other parts of the thinning, the hole diameter, and thickness uniformity of the elbow.More and more industries and enterprises have applied 20G elbow. 20G elbow is made of 5310 raw materials.For some stand out, the user raises questions about quality.It is then cooled slowly, called annealing.Annealing is a heat treatment method in which steel is heated to the temperature of phase change or partial phase change and cooled slowly after heat preservation.The purpose of annealing is to eliminate the structure defects, improve the structure to make the composition homogenization and refine the grain, improve the mechanical properties of hot pressing elbow, reduce the residual stress;At the same time can reduce the hardness, improve the plasticity and toughness, improve the cutting performance.Therefore, annealing is not only to eliminate and improve the tissue defects and internal stress left by the previous process, but also to prepare for the subsequent process, so annealing belongs to the heat treatment of semi-finished products, also known as pre-heat treatment.The butt-welding elbow has weld. After the completion of welding construction, it is necessary to conduct anti-rust or anti-corrosion treatment according to the actual situation or the external environment of the pipeline, so as to avoid the corrosion or corrosion of the elbow at the weld.This process can ask us to clarify the quality of butt welding elbow before use.

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