Your Professional Flange Supplier
Ningbo Guohao Electro-Hydraulic Engineering Co., Ltd. has over 15 years of manufacturing experience. We combine strong technical expertise, advanced precision production equipment, and specialized hydraulic cylinder and system engineering capabilities. Our main products include hydraulic connectors, flanges (both welded and threaded), hydraulic hose connectors, nuts, and CNC machined parts. We sincerely welcome global customers and industry partners to visit our factory and explore collaborative opportunities.
-
![Blind Flange with Threaded Hole]()
Blind Flange with Threaded HoleA blind flange with threaded hole, also known as blind tapped flange, is a specialized type of flange. It is a solid disk with no central opening for fluid passage, but features threaded holes,read more -
![Bspt Flange]()
Bspt FlangeA Bspt flange, also known as a British Standard Pipe Taper flange, is a crucial component in piping systems. The inner hole of the Bspt flange is machined to a tapered pipe thread, which is denotedread more -
![Flat Face Weld Neck Flange]()
Flat Face Weld Neck FlangeA flat face weld neck flange is a crucial piping component. It features a flat sealing surface and a long, tapered hub. The flat face is designed to mate with other flanges, creating a seal with theread more -
![Long Weld Neck Flange]()
Long Weld Neck FlangeA long weld neck flange, also known as LWN flange, is a specialized type of flange. It has an extended neck, longer than a standard weld neck flange. This unique design allows it to act as a boringread more -
![Npt Threaded Flange]()
Npt Threaded FlangeAn NPT threaded flange is a kind of flange with a female NPT (American National Pipe Tapered Thread) in the center. It is used to connect with the male end of NPT threaded piping.read more -
![Raised Face Threaded Flange]()
Raised Face Threaded FlangeA raised face threaded flange is a key piping component. It has internal threads that enable connection to pipes or fittings with matching external threads, facilitating easy assembly and disassembly.read more -
![Stainless Steel Socket Weld Flange]()
Stainless Steel Socket Weld FlangeA stainless steel socket weld flange is a crucial piping component. It is usually made of materials like ASTM A182 F304, F316. It has a recess in the flange bore for the pipe to insert into.read more -
![Weld Neck Blind Flange]()
Weld Neck Blind FlangeWeld Neck Blind Flanges are a specialized type of flange characterized by their long, tapered hub and lack of a bore, making them ideal for high-pressure and high-temperature applications. They areread more -
![Flange with Orifice Welding Neck]()
Flange with Orifice Welding NeckA flange with orifice welding neck, also known as weld neck orifice flange, is a crucial piping component. It is mainly used for measuring the volumetric flow rate of liquids and gases in pipelines.read more
Why Choose Us
Extensive Experience
With over 15 years of experience in the manufacturing industry, we have accumulated extensive practical experience in production process optimization and quality control systems. We are able to efficiently address various technical issues during the production process and effectively ensure the consistent and stable quality of our products.
Customized Services
We provide customized solutions, encompassing design and manufacturing, dedicated to meeting the individual needs of customers in various industries in terms of functionality, specifications, and application scenarios.
Advanced Equipment
We are equipped with internationally advanced precision machining equipment, which significantly improves production efficiency and product accuracy, ensuring that our products meet high standards in dimensional tolerances and overall quality, thereby enhancing our products' competitive advantage in the market.
Specification
|
Product Name |
Flange |
|
Main Process |
Hot Forging, Cold Forging, CNC Machining |
|
Material |
Carbon Steel, Stainless Steel, Aluminum Alloy Or according to customer requirements |
|
Forging Weight Range |
10gram – 20kgs |
|
Forging Diameter |
5-600mm |
|
Surface Finish |
Pickling, Passivation, Sand-blasting, Shot-blasting, Electro-polishing, Buffing, Mirror-polishing, Zinc/Chrome Plating, Anodizing,Powder Coating,Electrophoretic painting etc. |
|
Machining Process |
CNC Machining/ Lathing/ Milling/ Turning/ Boring/ Drilling/ Tapping/ Broaching/Reaming /Grinding/Honing and etc. |
|
Machining Tolerance |
0.01mm |
|
Forging Surface Roughness |
Ra 6.3 |
|
Heat Treatment |
Solution, Annealing, Quenching, Tempering, Aging, etc. |
● Flanges have accurately drilled holes for easy assembly.
● They have controlled grain flow for optimal strength and stiffness.
● To facilitate good welding, flanges are machined bevels.
● For unrestricted flow when used for piping system, flanges are smooth and have accurate bore.
● This component has spot-facing to ensure fastener seating stays true and square.
Common Flange Types
Threaded flanges
It is also known as a screwed flange and has a style with thread inside. The flange bore fits with the matching male thread on the fitting or pipe. The threaded connections mean you can avoid welding in many use cases. You simply match the threading of the pipes you wish to connect.
Socket-weld flanges
Ideal for small pipe diameters with different pressure and temperature ratings scenarios, socket-weld flanges feature a connection where you place the pipe into the flange and then secure the connection with a single multi-pass fillet weld.
Slip-on flanges
Slip-on flanges are quite common and are available in large-size ranges. It can accommodate systems with high flow rates and throughput.
Lap joint flanges
Lap joint flanges require butt welding of the stub end to the fitting or pipe with a backing flange to create a flanged connection. The design makes this style popular for use in systems with physical systems or space that requires frequent maintenance and dismantling.
Weld neck flanges
Weld neck flanges need butt welding for installation. However, its performance, integrity in the systems with multiple repeat bends, and the ability to use them at high temperatures and high pressure make them a top choice for processing piping.
Blind flanges
Useful for isolation or terminating piping systems, blind flanges are essentially boltable blank discs. When you install them properly and combine them with the correct gaskets, it can achieve an outstanding seal that is easy to remove when needed.
Specialty flanges
The flanges types listed above are quite common. However, various specialized flange types are available to suit various environments and uses.
Materials Useful to Flange
Carbon steel
It is steel alloyed usually with carbon. The high strength and hardness increase with carbon content, lower melting point, and ductility. This is the most common material grade.
Alloy steel
It is steel alloyed with one or more elements that change or enhance the properties of steel. Common alloys include chromium, molybdenum, nickel, vanadium, and manganese.
Stainless steel
It is steel alloyed with chromium in amounts above 10%. Chromium enables stainless steel flange to have a much higher corrosion resistance than carbon steel which rusts readily from air and moisture exposure.
Cast irons
Iron when it is alloyed with silicon, carbon, and several other alloys makes cast iron. Silicon forces carbon out of the iron and forms a black graphite layer on the exterior of the metal. Cast irons have good machinability, castability, and fluidity.
Aluminum
It is a low-density, ductile, and malleable metal with medium strength. It has better corrosion resistance compared to any other typical alloy and carbon steel. It is most useful during flange construction that requires low weight and strength.
Brass
It is an alloy of zinc and copper and often comes with additional elements such as tin or lead. It is characterized by good conductivity, cold ductility, high-temperature ductility, and good strength.
PVC
Polyvinyl chloride or PVC is a thermoplastic polymer that is easy to assemble, durable, and inexpensive. It is resistant to both biological and chemical corrosion. The addition of plasticizers makes it more flexible and soft.
Different Face of A Flange to Connect
These flanges have an inner bore circle gasket and a tiny elevated portion around the bore. There are raised face flanges for various pressure and temperature ratings. Also, the most prevalent form of flange used in the oil and gas and chemical engineering sectors is RF flanges.
To hold the gasket in place, these flanges have elevated parts and matching grooves. However, gasket retention happens on the female face, offering more precise positioning and a wider range of materials.
The grooves and raised areas on these flanges mirror those on the male and female face flanges. This facilitates installation because the design encourages self-alignment of the flanges and creates a reservoir for gasket glue.
Flat face flanges have an even, flat surface. They also have a full-face gasket covering most of the flange surface.
This face type, used in high-pressure and temperature applications, has a notch in which a metal gasket is placed to maintain the seal.
Applications and Uses of Flange
Manufacturing industries
The presence of flanges in injection molding machines, plays a vital role in the mold-making process. They provide secure connections at the joints of, equipment like hydraulic and pneumatic systems and mold attachment. Proper connections allow for control and facilitate precise alignments among other factors.
Power Generation
In power generation facilities like hydroelectric and power plants, flanges serve critical purposes. They guarantee strong and secure connections at the joints of pumps, turbines, and other available machinery.
Water and Wastewater Treatment
Flanges are extensively used in sewer systems and water treatment plants. They establish connections between, pumps, pipelines, and other equipment.
Order Process
Contact Customer Service
1
>>
Submit Order
2
>>
Obtain a Quote
3
>>
Confirm Order
4
>>
Arrange Payment
5
>>
Track Order
6
>>
Receive and Inspect Goods
7
Packaging and Shipping
|
Packaging |
Loose package, Wooden cases |
|
Transportation methods |
Road transport, rail transport, sea transport, air transport |
FAQ
We're well-known as one of the leading flange manufacturers and suppliers in China. If you're going to wholesale high quality flange, welcome to get more information from our factory. Also, custom service is available.