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Material small encyclopedia joint fittings - focus on microfluidic control technology

There are many types of joint fittings, such as single/double ferrule joints, resin pipe joints, weld-free joints, automatic welded joints, metal joints, hose seal joints, quick joints, threaded joints, rotary joints, coupling joints, etc. Unclear, let us introduce the concept, use and classification of some joint types (elbows, equal-diameter tees, reducers, unions, sizes).
Elbow

First, the concept:
An elbow is a type of connecting pipe commonly used in plumbing installations. It is used to connect the bends of pipes to change the direction of the pipes.
Second, use:
A connecting pipe commonly used in pipeline installation, connecting two pipes of the same or different nominally through, so that the pipe bends at a certain angle, the nominal pressure is 1-1.6Mpa
Third, classification:
1 According to the angle, there are three most commonly used 45° and 90°180°, and other abnormal angle elbows such as 60° are also included according to engineering needs.
2 According to the material, there are cast iron, stainless steel, alloy steel, malleable cast iron, carbon steel, non-ferrous metals and plastics.
3 According to the connection with the pipe, direct welding (the most common way) flange connection, hot melt connection, fused connection, threaded connection and socket connection.
4 According to the production process, welding elbows, stamping elbows, push elbows, casting elbows, butt weld elbows, etc.
Fourth, the common elbow brand
Xiongsu, Liansu, Jinde, Gudi, Yushi, Jin Jinqiu, etc.
V. Factors affecting elbow prices
1 caliber size
2 wall thickness
3 material (stainless steel > cast iron > plastic)

Equal path tee

First, the concept:
The equal-diameter tee is a pipe fitting and a pipe connecting piece, and is used at a branch pipe of the main pipe. The equal-diameter tee is also called the three-way, which is a kind of three-way. The three-way has three general-purpose three-way and three-way three-way. Because the three ends can be named after connecting to the pipe. The "T3" tee indicates an equal diameter tee with an outer diameter of 3 inches.
Second, use:
Equal-diameter tee is widely used in the construction and maintenance of petrochemical, oil and gas, liquefied petroleum gas, chemical fertilizer, power plant, nuclear power, shipbuilding, papermaking, pharmaceutical, food hygiene, urban construction and other industries. In the industry, the pressure on such pipe fittings is relatively high, the maximum pressure can reach 600 kg, and the water pressure in the living is low, generally 16 kg.
Third, classification:
1 Divided by carbon steel, cast steel, alloy steel, stainless steel, copper, aluminum alloy, plastic, argon, ppc, etc.
2 divided by the production method can be divided into top system, pressing, forging, casting and so on.
3 According to the manufacturing standards, it can be divided into national standard, electric standard, water standard, American standard, German standard, Japanese standard and Russian standard.
Fourth, the impact of the three-way price factor
1 caliber size
2 materials
3 nominal pressure size

Reducing tee

First, the concept:
The reducer tee is a pipe fitting and a pipe joint, and is used at a branch pipe of the main pipe. The branch pipe is different in diameter from the other two because the three ends can be named after being connected to the pipe. The representation method is as follows: large diameter size × small diameter ruler, such as 32*20; “T4×4×3.5” means a reduced diameter tee with a diameter of four inches and a diameter of 3.5 inches.
Second, use:
Reducing tee is widely used in the construction and maintenance of petrochemical, oil and gas, liquefied petroleum gas, chemical fertilizer, power plant, nuclear power, shipbuilding, papermaking, pharmaceutical, food hygiene, urban construction and other industries. In the industry, the pressure on such pipe fittings is relatively high, the maximum pressure can reach 600 kg, and the water pressure in the living is low, generally 16 kg.
Third, classification:
1 can be divided into top system, pressing, forging, casting, etc.
2 According to the manufacturing standards, it can be national standard, electric standard, water mark, American standard, German standard, Japanese standard, Russian standard, etc.
Fourth, the influence of the three-way price factor
1 caliber size
2 materials
3 nominal pressure size

Coupling

First, the concept:
The union, also called 壬 or 任, is a common pipe connection that can be easily installed and disassembled. There are mainly three parts: nut, cloud head and flat.
Second, the classification:
Pipe joints machined by round steel or steel ingots, the connection form is divided into socket welding and threaded connection. The socket welding is to insert the steel pipe into the socket to weld. Therefore, it is called “socketing”. "Joint joint", the threaded connection is to screw the steel pipe into the screw hole for connection, so it is called "thread joint".
Third, use
Socket joints and threaded joints can be widely used in pipes of different calibers, as well as watermarks and valves. Due to the use of the socket structure, the pipe joint reduces the cost, the installation, use and maintenance are extremely convenient, and at the same time, the leakage resistance is extremely high, and there is a great market prospect.
Fourth, the impact of elbow price factors
1 caliber size
2 materials
3 interface form
Size head

First, the concept:
The size of the head is also called the reducer, the direct diameter, and the different diameter. One of the chemical fittings used for the connection between two pipes of different diameters. For inconsistent nominal diameters between valves and piping (or piping and piping) (to save money or use existing materials), valves and piping (or piping and piping) cannot pass standard flanges, threaded fasteners Directly connected or welded. At this time, a pipe fitting (which can be made or purchased) that can be directly connected to the valve at the other end and can be directly connected to the pipe is added. This pipe is commonly called "size".
Second, use:
Size This product is suitable for dairy, food, beer, beverage, pharmaceutical, cosmetics and other industrial fields.
Third, classification:
1 According to the shape, it is divided into two types: concentric size head and eccentric size head.
2 According to the material, stainless steel head alloy steel, carbon steel size head, the size of the head material is 20 steel, Q235, Q345, 16Mn and so on.
Fourth, the impact of elbow price factors
1 caliber size
2 materials
3 varieties

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