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Basic Knowledge of Pipe Fittings

Jul. 27, 2020

The so-called pipe fittings are parts that connect pipes into pipelines. According to the connection method, it can be divided into four categories: socket pipe fittings, threaded pipe fittings, flange pipe fittings and welded pipe fittings. It is mostly made of the same material as the pipe. There are elbows, flanges, three-way pipes, four-way pipes (cross heads) and reducers (small and small heads). The elbow is used in the place where the pipe is turned; the flange is used to connect the pipe and the pipe to the part of the pipe, connected to the pipe end, the three-way pipe is used for the place where the three pipes meet; the four-way pipe is used for the place where the four pipes meet; The reducer is used where two pipes of different diameters are connected.

There are also many methods for processing pipe fittings. Many of them belong to the category of mechanical processing, and the most used are the stamping method, forging method, rolling method, rolling method, bulging method, stretching method, bending method, and combined processing method. Pipe fitting processing is an organic combination of machining and metal pressure processing.

Bulging method: one is to place rubber in the tube and compress it with a punch on the top to make the tube protrude into shape; the other method is hydraulic bulging, filling the middle of the tube with liquid, and bulging the tube into the required shape by liquid pressure , Like most of our commonly used bellows production, this method is used.


Forging method: Use a swage forging machine to punch out the end or part of the pipe to reduce the outer diameter. Common swage forging machines include rotary, connecting rod, and roller types.

Roller method: Place a core in the tube, and use a roller to push the outer circumference for round edge processing.

Rolling method: Generally, no mandrel is used, and it is suitable for the inner round edge of thick-walled pipe.

Bending method: There are three commonly used methods, one method is called stretching method, the other method is called stamping method, and the third method is the familiar roller method. There are 3-4 rollers, two fixed rollers, and one adjustment method. Roll, adjust the fixed roll distance, the finished pipe is bent. This method is widely used. If the spiral tube is produced, the curvature can be increased.

Stamping method: Use a tapered core on the punch to expand the tube end to the required size and shape.

The above information is provided by carbon steel pipe tee suppliers.

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