Elbow, a pipe fitting commonly used in pipeline installation, is used to connect two pipes with the same or different nominal diameter, so that the pipeline can make a certain angle turn. Bending radius less than or equal to 1.5 times of pipe diameter is elbow, and greater than 1.5 times of pipe diameter is elbow. According to the angle, there are three kinds of most commonly used: 45 °welded elbow and 90 °welded elbow 180 °welded elbow. In addition, according to the needs of the project, there are other abnormal angle elbows such as 60 °. Elbow materials include cast iron, stainless steel, alloy steel, malleable cast iron, carbon steel, non-ferrous metals and plastics, etc.
Socket elbow is a kind of high-pressure elbow pipe connecting fitting, which is mainly formed by forging blank of round steel or ingot and then processed by lathe. It is a kind of forged socket pipe fittings.
There are two types of nozzle sizes for socket pipe fittings, i.e. a series (I Series) nozzle size and B series (II Series) nozzle size, or British nozzle (i.e. a series size) and metric nozzle (i.e. B series size). In addition, some standards directly stipulate that the nozzle size is a series, and these standards include asmeb16.11 and sh3410 standards. There are two sizes in some standards, and the nozzle size needs to be implemented during production and processing. These standards include GB / t14383-2008, GB / t14383-93, hg21634, etc. if the user does not provide which nozzle size to choose, it is generally a series by default. However, it should be noted that hg21634 is the standard. If it indicates that the nozzle is a, the size of Series B nozzle should be selected.
Stainless steel elbow is a kind of stainless steel special-shaped pipe. It mainly distinguishes the shape of the pipe after forming, including U-shaped pipe, J-shaped pipe, S-shaped pipe, snake shaped pipe, etc.
Advantages of stainless steel elbow: the stainless steel elbow is processed by polishing mirror surface, the products are connected by seamless welding technology, and the weld bead is flat, meeting the strict requirements of customers for drawing, bending and other processing. Compared with the round pipe, stainless steel elbow generally has larger inertia moment, section modulus, bending and torsion resistance, which can greatly reduce structural weight and save steel.
Stainless steel bending process:
1. Curved stainless steel pipes will be used in many places of life and construction projects to meet the diverse and complex construction requirements of the project.
2. The stainless steel elbow is made of round, square or other shapes of stainless steel pipe passing through a specific machine, which is processed by bending, bending, rolling and other processes to meet the construction requirements, and does not damage the internal structure of the steel pipe and affect the service life.
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