Flanged Cross
A flanged cross, also known as a cross four-way, belongs to the cross-shaped four-way pipe fittings of piping systems. All four ports come with flanges, and it connects to pipes, valves, and equipment via bolts together with sealing gaskets, without the need for on-site welding. The medium can achieve simultaneous four-way diversion, multi-way merging, and bidirectional cross-distribution of pipelines, and the four interfaces can be designed as equal-diameter or reducing structures. The internal flow passage of the product transitions smoothly, which helps reduce fluid turbulence, pressure drop, and local erosion. It complies with standards such as GB/T12459, GB/T9113, HG/T21635, ASME B16.9, and ANSI B16.5. Materials cover 20# carbon steel, Q235B, Q345B, 304/316L stainless steel, alloy steel, and ductile iron. Pressure coverage ranges from PN6 to PN100 and Class150 to Class1500, with diameters from DN15 to DN1200. It can transport media such as clean water, steam, gas, oil products, sewage, and chemical fluids, and is suitable for centralized distribution scenarios in multi-branch pipe networks.
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Flanged Reducer
Flanged reducers are used for diameter transition between large pipes and small pipes in piping systems. Both ends have integrally flanged discs and are connected by bolts and sealing gaskets. No hot work welding is required on site, and later disassembly, assembly, and maintenance are also convenient. The products are divided into two structures: concentric and eccentric. The concentric type is mostly used for diameter reduction of vertical risers, while the eccentric type is used for horizontal pipelines, which can avoid the accumulation of gas or liquid in the pipe and reduce the risk of gas blockage and water hammer. The internal conical flow passage transitions smoothly, which helps stabilize the medium flow rate, reduce local pressure drop, and reduce pipe wall erosion. It implements standards such as GB/T17185, GB/T12459, HG/T21635, and ASME B16.5. The diameter range is DN15 to DN1200, and the pressure coverage is PN6 to PN100 and Class150 to Class1500. Materials include 20# carbon steel, Q235B, Q345B, 304/304L/316/316L stainless steel, 16Mn alloy steel, and ductile iron. Special materials such as duplex steel and Hastelloy can also be customized according to project requirements.
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Flanged concentric reducer
Flange concentric reducers are also commonly called flange concentric size heads, and belong to flanged one-piece reducing pipe fittings. The centers of both ends are on the same central axis, the shape is a symmetrical cone, and both ends have their own flange plates. They rely on bolts together with sealing gaskets to complete pipeline connections, without the need for on-site hot work welding, and are convenient for disassembly, assembly, and maintenance. They are mainly used on vertical risers, connecting two sections of pipeline with different nominal diameters, allowing the fluid to transition smoothly at the reducing point, adjusting the medium flow rate, reducing local pressure drop, and solving the problem of mismatched pipe, valve, and equipment diameters on risers. The interior is a smooth conical flow channel, the medium flows smoothly, turbulence is small, and pipe wall erosion loss is low. The product implements standards such as GB/T17185, GB/T12459, HG/T21635, and ASME B16.5, with nominal diameters DN15 to DN1200, and supports arbitrary diameter reducing combinations at both ends. Pressure ratings cover national standards PN6, PN10, PN16, PN25, PN40, PN64, and PN100, and American standards Class150 to Class1500. Materials can be selected from 20# carbon steel, Q235B, Q345B, 304/304L/316/316L stainless steel, 16Mn alloy steel, and ductile iron, and can also be customized according to project requirements 2
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Flanged Eccentric Reducer
Flanged eccentric reducers belong to flanged reducing pipeline fittings, with flanges integrated at both ends, an eccentric conical flow channel inside, and the centers of the pipe openings at both ends not on the same centerline, while the pipe wall on one side remains straight. After installation, the bottom or top of the pipeline is flush, which can effectively avoid air pockets, accumulated liquid, and impurity sedimentation in horizontal pipelines, reducing the risks of pump cavitation, water hammer, and idle running. The products adopt hot-press forming, forging, or integral casting processes, and are connected by bolts and sealing gaskets, requiring no on-site welding and making disassembly, assembly, and maintenance convenient. We can provide materials such as carbon steel, stainless steel, alloy steel, and ductile iron, with pressure ratings covering PN6 to PN100 and Class150 to Class1500, and sealing surfaces available in RF raised face, MFM male-female face, etc. They are suitable for horizontal transportation pipelines in water supply and drainage, HVAC and fire protection, chemical engineering, power plant circulating water, sewage treatment, etc., and are also suitable for overseas engineering and foreign trade procurement.
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Flange Pipe Cap
Flanged pipe caps belong to flanged pipeline plugging fittings. They are connected to pipeline flanges by bolts and do not require on-site welding or cutting. They can be used for permanent plugging as well as temporary plugging and pressure test isolation. During later maintenance, capacity expansion, or hot tapping, they can be removed simply by unbolting. The products can be processed by forging, hot pressing, or casting processes, and are manufactured to standards such as GB/T, HG/T, and ASME B16.5. The diameter range covers DN15-DN1200. Materials include carbon steel, stainless steel, alloy steel, and ductile iron. Pressure ratings cover national standard PN6 to PN100 and American standard Class150 to Class1500. Sealing surfaces can be selected as RF raised face, MFM male-female face, TG tongue-and-groove face, and RJ ring joint face. We can assist in confirming the configuration and providing a quotation according to the project's diameter, material, pressure rating, and sealing surface requirements.
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Forged flanged pipe fittings
Forged flanged pipe fittings are formed through an integral forging process. The raw materials undergo high-temperature forging, upsetting, heat treatment, and precision machining, resulting in a dense internal metal structure in which defects such as porosity, laminations, and looseness are eliminated. Both ends of the product integrate a flange structure, achieving sealed pipeline connections through bolts and gaskets, making disassembly, assembly, and maintenance convenient. The series covers forged flanges, elbows, tees, reducers, pipe caps, and branch outlets, and complies with standards such as GB/T, HG/T, SH/T, ASME B16.5, and ASME B16.9. Nominal diameters are mainly DN15-DN600, and extra-large diameters can be customized up to DN2000. Pressure coverage includes national standard PN40 to PN160 and American standard Class150 to Class2500, while threaded forgings support 3000#, 6000#, and 9000# pound ratings. Materials include A105 carbon steel, 16Mn, 304/316L stainless steel, chrome-molybdenum heat-resistant steel, duplex steel, etc., suitable for the transportation of steam, high-pressure oil and gas, and corrosive media.
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Cast flanged pipe fittings
Cast flanged pipe fittings differ from forged pipe fittings. Through the casting process, large-diameter, special-shaped, and complex-structure pipe fittings can be formed in one piece, with strong integrity, regular dimensions, and a full appearance, and the cost advantage is obvious during mass production. The products we provide cover diameters from DN15 to DN2000, with pressure ratings adapted to PN6, PN10, PN16, PN25, and PN40, and American standards adapted to Class150 and Class300. Materials include gray cast iron, ductile iron, cast steel, stainless steel castings, and alloy cast steel. Before leaving the factory, they undergo aging treatment, grinding and finishing, machining and drilling, and finish turning of the sealing surface. The integrated flange structure requires no secondary welding and can be installed on site by bolting directly. The products are mainly used in low-pressure and normal-temperature pipeline systems such as municipal water supply and drainage, rainwater and sewage diversion, sewage treatment, fire protection pipe networks, heating, ventilation and thermal power, and farmland water conservancy, and are not suitable for high-temperature and high-pressure process pipelines.
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Steel plate rolled flange pipe fittings
Steel plate rolled flange pipe fittings, also called rolled welded flange pipe fittings, are flange pipe accessories we provide for extra-large diameter pipeline projects. They are made from finished steel plates through CNC cutting, hydraulic cold rolling forming, automatic submerged arc welding, weld seam inspection, shaping and aging, and flange machining. The flange and the pipe fitting body are welded into one piece, and sealing and disassembly of the pipeline are achieved by means of bolts and gaskets. The products cover rolled flanges, rolled flange elbows, rolled flange tees, rolled reducers, rolled pipe caps, and rolled blind plates, with nominal diameters DN600 to DN5000, wall thickness 6 mm to 60 mm, pressure ratings PN6, PN10, PN16, PN25, PN40 and American standard Class150, Class300. Commonly used materials include Q235B, Q345B, 16Mn, 20# carbon steel, 304, 316L stainless steel, and weathering steel plates. They comply with standards such as GB/T, HG/T, JB/T, ASME B16.5, and DIN, and are suitable for room-temperature tap water, sewage, rainwater, circulating water, low-pressure gas, and weakly corrosive water bodies, with an operating temperature of -20°C to 350°C. Non-standard widening, thickening, and special-shaped customization are supported, making them suitable for large-scale infrastructure projects and foreign trade export orders.
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Seamless machined flanged pipe fittings
The seamless machined flange pipe fittings we supply are formed directly from a whole seamless steel pipe, with no welded seams, and no sand holes or slag inclusions commonly found in rolled or cast parts. The flange sealing surface is CNC precision-turned, ensuring tight mating and easy disassembly and maintenance. Conventional diameters cover DN15 to DN600, pressure ratings range from PN16 to PN100 and American standard Class150 to Class900, and materials include 20#, Q235B, Q345B, A105 carbon steel, 304, 316L stainless steel, and alloy steel. Categories include seamless flange elbows, tees, reducers, pipe caps, and nipples, suitable for continuous operating conditions such as chemical process pipelines, thermal main pipelines, gas transmission pipelines, and power plant auxiliary equipment pipelines. If you have specific diameter, material, and pressure requirements, welcome to contact us to confirm stock availability or customized solutions.
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