Concentric reducer

Reducing pipes, also known as reducers, are one of the pipeline fittings used in fluid pipeline construction for connecting two different pipe diameters. They can be divided into RC concentric reducers and RE eccentric reducers according to their shapes. Concentric reducing pipe is a type of pipe fitting used for pipe diameter changes. The commonly used forming process is reduced diameter pressing, expanded diameter pressing, or reduced diameter plus expanded diameter pressing. For some small-sized reducing pipes, stamping forming can also be used. Application of concentric reducers: When there is a change in the flow rate of the fluid in the pipeline, such as an increase or decrease, and the flow velocity requirement does not change significantly, reducers need to be used; To prevent cavitation during pump procurement, it is necessary to use a reducing pipe; In order to match with the joints of instruments such as flow meters and regulating valves, reducing pipes are also required. At present, most pipe networks require the use of reducers, mainly used in petroleum, chemical, gas, steam pipe networks, hydraulic machinery, etc

Concentric reducers can be divided into carbon steel (20 #, A3, Q235, Q23 excellent, Q235B, 20G, 16Mn, Q345, Q345R, ASTM A234WPB, ASTM A105, etc.) according to their manufacturing materials; Stainless steel: (304, 304L, 316, 316L, S30408, S30403, S31608, S31603, SUS304, ASTM A403, TP321, TP317L, 347, 0Cr18Ni9, 00Cr19Ni10, 00Cr17Ni14Mo2, 1Cr18Ni9Ti, 06Cr17Ni12Mo2, 022Cr17Ni12Mo2, etc.)

Common execution standards for concentric reducers:

Standards: GB/T12459-2017, GB/T13401-2017

American standard: ASME B16.9

Petrochemical standards: SH/T3408-2012, SH/T3409-1996