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Xi'an Longjoy Foreign Trade Co., Ltd
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Reducer is a kind of pipe fitting used for pipe reducing. Its connection form is to directly weld reducing pipe and steel pipe. The two ends of carbon steel concentric reducer have different diameters, which are used to connect different diameter pipes or flanges for reducing. The orifices at both ends of the concentric reducer are on the same axis. When the reducer is changed, if the position of the pipe is calculated according to the axis, the position of the pipe will not change.
Standard: GB / t12459, GB / T13401, ASME b16.9
Material: carbon steel
Size range: DN 6-100
Pressure range: 3000 × 6000 × 3
Thickness: XS and XXS
Surface treatment: anti-oil; anti-painting
| NPS | Outside Diameter at Bevel | End-to- End, H | |
| Large End | Small End | ||
| 3/4X1/2 | 26.7 | 21.3 | 38 |
| 3/4X3/8 | 26.7 | 17.3 | 38 |
| 1x3/4 | 33.4 | 26.7 | 51 |
| lxl/2 | 33.4 | 21.3 | |
| 1-1/4X1 | 42.2 | 33.4 | 51 |
| 1-1/4X3/4 | 42.2 | 26.7 | |
| 1-1/4X1/2 | 42.2 | 21.3 | |
| 1-1/2X1-1/4 | 48.3 | 42.2 | 64 |
| 1-1/2X1 | 48.3 | 33.4 | |
| 1-1/2X3/4 | 48.3 | 26.7 | |
| 1-1/2X1/2 | 48.3 | 21.3 | |
| 2x1-1/2 | 60.3 | 48.3 | 76 |
| 2X1-1/4 | 60.3 | 42.2 | |
| 2x1 | 60.3 | 33.4 | |
| 2x3/4 | 60.3 | 26.7 | |
| 2-1/2x2 | 73 | 60.3 | 89 |
| 2-1/2X1-1/2 | 73 | 48.3 | |
| 2-1/2X1-1/4 | 73 | 42.2 | |
| 2-1/2x1 | 73 | 33.4 | |
| 3x2-1/2 | 88.9 | 73 | 89 |
| 3x2 | 88.9 | 60.3 | |
| 3x1-1/2 | 88.9 | 48.3 | |
| 3X1-1/4 | 88.9 | 42.2 | |
| 3-1/2X3 | 101.6 | 88.9 | 102 |
| 3-1/2X2-1/2 | 101.6 | 73 | |
| 31/2x2 | 101.6 | 60.3 | |
It is generally used for the diameter change of gas or vertical liquid pipe. Concentric reducer at both ends of the nozzle circumferentially cut, generally used for horizontal liquid pipeline.
When the cutting point of the carbon steel concentric reducer is upward, it is called top flat installation, which is generally used at the pump inlet to facilitate the exhaust.
The cutting point downward becomes bottom flat installation, which is generally used for the installation of the regulating valve and exhaust.
Concentric reducer is beneficial to the flow of fluid, and it has less interference to the flow state when changing the diameter. Therefore, concentric reducer is used to change the diameter of gas and vertical flow liquid pipeline.
Since one side of the concentric reducer is flat, which is convenient for exhaust or liquid discharge, and is convenient for start-up and maintenance, the horizontal installed liquid pipe generally uses the concentric reducer.
The common forming process of carbon steel concentric reducer is reducing pressing, expanding pressing or reducing plus expanding pressing, and stamping can also be used for some specifications of reducer.
The process of reducing forming is to put the tube blank with the same diameter as the big end of the concentric reducer into the forming die.
By pressing along the axial direction of the tube blank, the metal moves along the die cavity and shrinks to form. According to the size of reducer, it can be divided into one-time pressing forming or multiple pressing forming.
Stamping refers to the use of steel pipes as raw materials to produce small and large heads, and the use of stamping technology for the production of small and large heads of some specifications.
The shape of the die used for drawing is designed according to the size of the inner surface of the head, and the steel plate after blanking is punched and drawn by the die.
Carbon steel concentric reducer standard: national standard, American Standard, British standard and arious non-standard high-pressure stamping.
The quality of reducer shall meet the requirements of current national standard steel butt welded seamless pipe fittings and steel plate butt welded pipe fittings.
The roundness of reducer shall not be greater than 1% of the corresponding end outer diameter, and the allowable deviation shall be 3mm; the allowable deviation of reducer size shall meet the requirements.
The main manufacturing standards of carbon steel concentric reducer are generally GB / t12459, GB / T13401, ASME b16.9, sh3408, sh3409, Hg / t21635, Hg / t21631, SY / t0510.
Carbon steel concentric reducer is an important pipe fitting product which can not be replaced in the pipeline system. It is widely used in various pipeline systems and plays a huge role.
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