Big butt is big butt welding elbow: welded elbow is steel hot-pressing molding or bend forging forming, its connection form is directly to the elbow and the steel pipe butt welding, butt welding elbow generally main manufacturing standards GB/T12459, GB/T13401, ASME B16.9, SH3408, SH3409, HG/T21635, HG/T21631, SY/T0510. The butt welding elbow usually has a 45 degree bend, 90 degree bend, 180 degree bend etc., the material has carbon steel, alloy steel and stainless steel.
Its main use is: large caliber butt welding elbow is mainly used to connect two different end radius of the pipe, or for pipe diameter modification. This type of elbow typically need according to the specific project requirements or detailed drawings for production, in addition to meet the requirements of the pipe size must also consider the pipe, such as pipeline pressure, fluid viscosity, abrasion resistance, corrosion resistance, fluid conveying a variety of factors such as temperature. The welding elbow is usually welded at the pipeline construction site, which is due to the different welding standards of various kinds of pipelines, which requires on-site welding according to the pipeline weld grade.
Large diameter welded elbow according to bend Angle, has 45 ° butt welding elbow, elbow and 180 ° 90 ° butt weld ends butt welding elbow, elbow other special Angle, can generally figure processing customized according to customer. General materials of large-caliber butt welded pipe fittings include: carbon steel, alloy steel and stainless steel elbow. The elbow can be divided into long radius butt welding elbow and short radius butt welding elbow according to its radius of curvature. The radius of curvature of the long radius to the welded elbow is 1.5 times the outer diameter of the pipe, that is, R= 1.5d. The radius of curvature of the short radius to the welded elbow is equal to the outside diameter of the pipe, which is R=1D. Where D is the diameter of butt welding elbow and R is the radius of curvature. According to the pressure level, there are about 17 kinds of pipes, which are the same as the American pipe standard, including: Sch5s, Sch10s, Sch10, Sch20, Sch30, Sch40s, STD, Sch40, Sch60, Sch80s and XS. Sch80, Sch100, Sch120, Sch140, Sch160, XXS, the two most commonly used are STD and XS
Our factory is specialized in welding elbow. Wh-steel CO.,LTD. Historically, no matter what industry, is all there is more, words shop around, and compared under the condition of increasingly fierce, if butt welding elbow company want to occupy the domestic market and the rapid development of a place, must be through the function of universal commodity itself to competitiveness. So why is WH-STEEL CO.,LTD (large-caliber welding elbow) the leading position in the industry?Welding elbow to ensure long - term effective and safe operation of equipment and product quality. More and more production equipment, especially chemical production equipment, are made of stainless steel of different materials. Production of all kinds of stainless steel grades in China more and more, but because of improper material selection, improper welding technology, component assembly is not reasonable, also can lead to shorten the operation time, even failure and safety accidents. In order to ensure the safety of the operators, it is necessary to analyze the causes of stainless steel elbow leakage failure. It is necessary for researchers to analyze and study the leakage accident of stainless steel elbow in chemical production equipment. Macroscopic examination based on the failure parts, parts material determination of chemical composition, metallographic microscopic inspection, corrosion area detecting data based on the analysis of system, find out the cause of the failure accident.
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