Shelf _ carbon steel elbow elbow elbow production process: first, the material heat pushing, pushing machine is a horn-shaped core head or mandrel, the mandrel by a fine thicker, push the system elbow process is expanding with a bending process, behind a support, the lower feed pipe penetration mandrel, behind the arch frame with a fixed mandrel, the middle of a car, car and some by hydraulic transmission, some by mechanical transmission that is screw drive, then push the car forward, pushing the car along the mandrel tube to move forward, there is an induction coil outside the mandrel, the tube is heated, well heated, and then push the tube under the car, on a good process. Second, finishing step, after shot peening, the inner and outer surfaces of the oxide scale removal elbow to carry out the groove for the welding process ends. Third, we must first select the specifications proposed pipe material, for example, 90-degree bend, the curvature can be calculated by how long the material can be processed at the Elbow 90 °, then the length of length is cut. Fourth, after a good push, elbow to shaping under heat this state, because some elbow treated properly, will twist, which is not allowed. In addition, the outer diameter of the front pusher generally, to be shaped by plastic molding. Plastic mold is actually a press, to have a mold, two and a half arc, up and down each one. After shaping the outer diameter of the finished size is reached. Classification elbow, according to its radius of curvature can be divided into long radius elbows and short radius elbows. Long radius elbow refers to its radius of curvature is equal to 1.5 times the pipe diameter, namely R = 1.5D. Short radius elbow refers to its radius of curvature is equal to the pipe diameter, that is R = D. Where D is the diameter of the bend, R is the radius of curvature. In terms of pressure rating points, about seventeen species, and the US standard pipe is the same, there are: Sch5s, Sch10s, Sch10, Sch20, Sch30, Sch40s, STD, Sch40, Sch60, Sch80s, XS; Sch80, Sch100, Sch120, Sch140, Sch160, XXS, one of the most common STD and XS are two kinds. According to the angle of bend points, 45o elbows with 90o and 180o elbow bend. As a kind of a lot of elbow, when ordering orders often take the following methods: such as "LR STD 90o 8", showing long radius, the pressure rating of STD, 90o 8 "elbow; another example," SR XS 45o 4 "for short radius, pressure rating XS, 45o of 4" elbow. Above the elbow about classification. If necessary, a circular ring shell can be cut four or six 90-degree elbow 60 degree elbow bend or other specifications, the process for the manufacture of elbow and elbow in diameter than the inner diameter is greater than any specification 1.5 large elbow, is an ideal method of manufacturing a large elbow. This method uses a molding process in the production of various elbow, showing a good value in different areas, making the process a good value at different production reflects the elbow. Elbow molding process is complex, the need for welding according to different materials and use, under certain pressure gradually forming. Elbow molding need to follow certain steps in strict conformity with the corresponding workflow process, otherwise it will have to produce the quality of elbow problems. The basic process is the large bend forming technology: welding a first polygonal cross-section polygonal ring shell or shell closed at both ends of the polygonal sector, when the internal pressure washed over the media, applying less pressure, under the action of the internal pressure cross-section polygon becoming round, eventually becoming a circular ring shell. This is the big bend of the molding process technology. Elbow pipe installation is commonly used in connection with a pipe, for many types of pipes connecting bend, elbows and flanges in the pipeline they have a very important role. 1. Material classified as carbon steel, cast steel, alloy steel, stainless steel, copper, aluminum, plastic, ppc and so on. 2. production methods into pushing, pressing, forging, casting and so on. 3. manufacturing standards can be divided into GB, electricity standard, water standard, American Standard, the German standard, Japanese standard, the Russian standard and so on. Classification elbow, according to its radius of curvature can be divided into long radius elbows and short radius elbows. Long radius elbow refers to its radius of curvature is equal to 1.5 times the pipe diameter, namely R = 1.5D. Short radius elbow refers to its radius of curvature is equal to the pipe diameter, that is R = D. Where D is the diameter of the bend, R is the radius of curvature. In terms of pressure rating points, about seventeen species, and the US standard pipe is the same, there are: Sch5s, Sch10s, Sch10, Sch20, Sch30, Sch40s, STD, Sch40, Sch60, Sch80s, XS; Sch80, Sch100, Sch120, Sch140, Sch160, XXS, one of the most common STD and XS are two kinds. According to the angle of bend points, 45o elbows with 90o and 180o elbow bend. As a kind of a lot of elbow, when ordering orders often take the following methods: such as "LR STD 90o 8", showing long radius, the pressure rating of STD, 90o 8 "elbow; another example," SR XS 45o 4 "for short radius, pressure rating XS, 45o of 4" elbow. Above the elbow about classification. Elbows, flanges mainly used in chemical, petroleum, petrochemical, power, water, pharmaceutical, boiler, shipbuilding and other industries. Elbow for products produced in turn, is connected, change direction, pressurization, reserved (refer to product re-designed to facilitate later revision), flange to the pipe and the valve is easy to connect and install. Hebei Pipe Manufacturing Co. Shang Hang shelf _ /// carbon steel elbow elbow