A seamless bend is fitting for a bend in a pipe. In the total pipe fittings used in the pipeline system, the proportion is the largest, about 80%.
Generally, different forming processes are selected for the elbows with different material wall thickness. Seamless elbow pipe fitting is divided into hot rolling (extrusion) seamless elbow pipe fitting and cold drawing (rolling) seamless elbow pipe fitting due to its different manufacturing technology. Carbon Steel Pipe Fittings Manufacturer shares with you.
Elbow forming method:
1, forging and pressing method: the end of the pipe or part of the forging machine to punch, to reduce the outside diameter, commonly used forging machine rotary, connecting rod, roller.
2, rolling method: generally do not use the core shaft, suitable for thick wall tube inner round edge. The core is placed in the tube, and the roller is used for edge processing.
3, stamping method: in the punch press with taper core to expand the tube end to the required size and shape.
4, bending forming method: there are three methods more commonly used, one method is called the stretching method, another method is called stamping method, the third roller method, there are 3-4 rollers, two fixed rollers, an adjustment roller, adjust the fixed roller distance, the finished pipe is bent.
5, swelling method: one is placed in the tube of rubber, the top with a punch compression, so that the tube protruding shape; Another method is hydraulic bulging, in which a liquid is filled in the middle of the tube, and the liquid pressure pushes the tube into the desired shape. This method is used in most of the production of bellows.
Advantages of the seamless elbow:
1. Hygienic and non-toxic: the material is completely composed of carbon and hydrogen, and no toxic heavy metal salt stabilizer is added. The material's sanitary performance has passed the test of the state authority.
2. Lightweight: the density of the stamping elbow is 0.89-0.91g/cm, only one-tenth of that of the steel pipe. Because of lightweight, it can greatly reduce the cost of transportation and installation of the construction intensity.
3, good heat resistance: when the working water temperature is 70 degrees, the softening temperature is 140 degrees.
4, good corrosion resistance: except a few hydrogenation agents, can withstand the erosion of a variety of chemical media, with excellent acid resistance, alkali resistance, corrosion resistance, no rust, no corrosion, no breeding bacteria, no electrochemical corrosion.
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