Reducer Pipe Fittings

According to the different shapes, it is divided into concentric reducer and eccentric reducer. The reducer materials include stainless steel reducer (304304l316316l), alloy steel, carbon steel reducer, and the reducer materials include 20# steel, Q235, Q345, 16Mn, etc.

Reducer pipe fittings are pipe fittings used to connect pipes of two different diameters and are important components of industrial pipeline systems. Reducer pipe fittings are generally used to connect the inlet and outlet of equipment with pipelines and to reduce the diameter of branches in pipelines. They can change the flow rate of fluids, slow down the erosion of internal parts by fluids, and reduce the consumption of pipeline materials.

Depending on the molding process and structure, reducer pipe fittings include steel pipe die-cast reducers, steel plate welded reducers, and steel plate welded eccentric reducers (this article only discusses concentric reducers). Steel pipe die-cast reducers are formed by hot pressing seamless steel pipes through molds.

 The reducer itself has no welds and a straight section is left at the welding point with the straight pipe, so it has higher strength; steel plate welded reducers are formed by cutting steel plates into sectors and rolling them using specific equipment. Since the reducer itself has a weld, its strength is relatively low.

Reducer failure accidents often occur in industrial production, many of which are caused by cracking of the weld between the cone of the welded reducer and the connecting pipe. Finite element analysis also found that there is obvious stress concentration in the welded parts of the steel plate welded reducer and the pipeline.

The Classification Of Reducer Pipe Fittings

Classification By Material

Carbon steel: ASTM/ASME A234 WPB, WPC

Alloy: ASTM/ASME A234 WP 1-WP 12-WP 11-WP 22-WP 5-WP 91-WP911, 15Mo3 15CrMoV, 35CrMoV

Stainless steel: ASTM/ASME A403 WP 304-304L-304H-304LN-304N

ASTM/ASME A403 WP 316-316L-316H-316LN-316N-316Ti

ASTM/ASME A403 WP 321-321H ASTM/ASME A403 WP 347-347H

Low-temperature steel: ASTM/ASME A402 WPL3-WPL 6

High-performance steel: ASTM/ASME A860 WPHY 42-46-52-60-65-70

Discover a wide range of high-quality materials including cast steel, alloy steel, stainless steel, copper, aluminum alloy, plastic, asphalt, PVC, PPR, RFPP (reinforced polypropylene), and more.

Classification By Production Method

The production process can be segmented into pushing, pressing, forging, casting, etc.

Production Standards Of Reducer Pipe Fittings

The standards of big and small heads are national, American, British, and various non-standard products.

The corresponding standards of flanges and tube sheets for pressure vessels of the Ministry of Electric Power GD0506~0507: NB/T 47020~47027-2012 implement the national standard (GB/T9112-2010), the standard of the Ministry of Machinery (JB/T81-2015, JB/T74-2015), the standard of the Ministry of Petrochemicals (SH3406-2013), the marine standard GB/T10752-2005, the standard of the Ministry of Chemical Industry (HG/T20592-2009), etc. The material of the exported forged steel flange meets the ASTM A105 standard of the United States.

It includes national, electric, marine, chemical, water, American, German, Japanese, and Russian standards, among others.

Production Process Of Reducer Pipe Fittings

The bending moment caused by the pressure difference between the large and small ends of the reducer causes the large end to open relatively and the small end to shrink relatively. Reducers (reducers) are a kind of pipe fittings used for pipe diameters. The commonly used forming processes are reducing and pressing, expanding and pressing, or reducing and expanding. For reducers of certain specifications, stamping can also be used.

Reducing/Expanding Forming

The production process for creating reducers involves placing a tube blank with the same diameter as the large end of the reducer into a forming die. By applying pressure along the axial direction of the tube blank, the metal moves along the die cavity and shrinks to form the desired reducer. According to the size of the diameter change of the reducer, it is divided into one-time pressing forming or multiple pressing forming.

Stamping Forming

In addition to using steel pipes as raw materials to produce reducers, some specifications of reducers can also be produced by stamping forming process using steel plates. The shape of the die used for stretching is designed with reference to the inner surface size of the reducer, and the steel plate after cutting is stamped and stretched by the die.

The Application Of Reducer Pipe Fittings

Widely used in natural gas, electricity, petroleum, chemical, industry, pharmaceutical, pressure pipelines, etc.

Elite Piping Manufacture Co., Ltd is manufacturer and supplier of flanges, pipe fittings and line pipes.We are a company specializing in reducer pipe fittings.If you have any needs, please feel free to contact us.