Reducing pipe 4

Installation instructions for reducing pipes:
Before bonding the large and small heads, wipe the socket side and the outer side of the socket with a dry cloth. If there is oil stains on the surface, wipe it clean with acetone. The following points should be noted:
1、 Product materials: stainless steel 304, 316, 316L;
2、 Control caliber: DIN standard, 3A/IDF standard, ISO standard;
3、 International industrial standards: DIN, ISO, SMS, 3A, IDF, etc;
4、 Quality and Application: High end polishing equipment is used to process both the inside and outside of the large and small heads to achieve surface precision requirements; This product is suitable for industrial fields such as dairy products, beverages, pharmaceuticals, cosmetics, etc.
The size of the concentric reducer and the size of the connecting pipe are different, and they are also suitable for different industries. In industries such as power, mining, and metallurgy, material transportation and output are carried out using close range and high-pressure transportation. Pipelines are subjected to considerable pressure and severe wear, and single material pipelines are difficult to meet the requirements of this working condition, especially for fittings such as elbows, concentric reducers, and stamped elbows. Considering their safety and service life, the focus is on improving the toughness, impact resistance, and wear resistance of the pipeline lining. At the same time, the overall strength of pipelines and elbows should also be considered.
Reducing pipes, also known as reducers, are used to connect pipes of different sizes; There are generally two types of reducers: concentric reducers and eccentric reducers. When the projections of the two ports of a reducer are concentric circles after it is erected, it is called a concentric reducer; The projection of an eccentric reducer is that the small circle is inscribed on the outer circle. The water heater with reducing pipe adopts reducing dense discharge technology, regardless of the changes in seasons such as spring, summer, autumn, and winter, even in cloudy, rainy, and snowy weather, it has the characteristic of high efficiency and good first heating to reach the bathing temperature. At the same time, the energy-saving and emission reduction effects are more significant. The overall thermal efficiency of the water heater can reach about 73% by adopting the reducing diameter dense discharge technology, which not only saves electricity and coal, but also reduces carbon dioxide emissions.
The following introduces the reducer and eccentric reducer respectively.
The roundness of the reducer should be less than or equal to 1% of the corresponding end outer diameter, and the allowable deviation is ± 3mm. The ultimate torque of concentric reducers is slightly higher than that of eccentric reducers, and the ultimate torque of the large end face section of the reducer is relatively smaller than that of the small end face section. The concept that the torque at one end cannot be fully transmitted to the other end when subjected to end face torque in a reducing bend pipe is also proposed, and the torque will gradually be converted into bending moment during transmission. The bending moment of one end face of a 90 ° bend can be converted from the torque of the other end face. A finite element modeling method was proposed for concentric reducing pipes, eccentric reducing pipes, and reducing bent pipes.
Eccentric reducer is one of the chemical pipe fittings used for connecting two different pipe diameters. Divided into concentric reducers and eccentric reducers. The commonly used forming processes are reduced diameter pressing, expanded diameter pressing, or a combination of reduced diameter and expanded diameter pressing. For certain specifications of reducing pipes, stamping forming can also be used. Reducing pipes are safe, reliable, hygienic, environmentally friendly, economical and applicable. The development of thin-walled pipelines and new reliable, simple and convenient connection methods has made them have more advantages that cannot be replaced by other pipe materials. Their application in engineering will become more and more widespread, and their prospects are promising.
The material of the eccentric reducer is carbon steel, which is represented by multiplying the diameter of the large head by the diameter of the small head.
The shrinkage forming process of eccentric reducing pipes is to place a billet with the same diameter as the large end of the reducing pipe into a forming mold, and press it along the axial direction of the billet to make the metal move along the mold cavity and shrink into shape. According to the size of the diameter change of the reducer, it can be divided into one-time compression forming or multiple compression forming.
The materials of eccentric reducers include stainless steel reducers (304304l3163161L), alloy steel, reducers made of carbon steel with large and small heads, reducers made of 20 # steel Q234q345, etc.
Eccentric reducer standard: National standard, American standard, British standard, and various non-standard high-pressure stamping.
The characteristics of eccentric reducing pipes are significantly higher strength than carbon steel with the same carbon content, good toughness and plasticity, as well as good weldability and corrosion resistance.