Your Professional Welded 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.
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![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 -
![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 -
![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
|
Nominal Pipe Size |
Outside Diameter (O) |
Thickness (T) |
Raised Face Diameter (R) |
Length Thru Hub (Y) |
Point of Weld (A) |
Hub Diameter (X) |
Bore (B) |
Approximate Weight (lbs) |
Bolt Circle (C) |
Number of Holes |
Diameter of Holes |
|
1/2 |
3.5 |
0.44 |
1.38 |
1.88 |
0.84 |
1.19 |
0.62 |
2 |
2.38 |
4 |
0.63 |
|
3/4 |
3.88 |
0.5 |
1.69 |
2.06 |
1.05 |
1.5 |
0.82 |
2 |
2.75 |
4 |
0.63 |
|
1 |
4.25 |
0.56 |
2 |
2.19 |
1.32 |
1.94 |
1.05 |
3 |
3.13 |
4 |
0.63 |
|
1 1/4 |
4.63 |
0.63 |
2.5 |
2.25 |
1.66 |
2.31 |
1.38 |
3 |
3.5 |
4 |
0.63 |
|
1 1/2 |
5 |
0.69 |
2.88 |
2.44 |
1.9 |
2.56 |
1.61 |
4 |
3.88 |
4 |
0.63 |
|
2 |
6 |
0.75 |
3.63 |
2.5 |
2.38 |
3.06 |
2.07 |
6 |
4.75 |
4 |
0.75 |
|
2 1/2 |
7 |
0.88 |
4.13 |
2.75 |
2.88 |
3.56 |
2.47 |
8 |
5.5 |
4 |
0.75 |
|
3 |
7.5 |
0.94 |
5 |
2.75 |
3.5 |
4.25 |
3.07 |
10 |
6 |
4 |
0.75 |
|
3 1/2 |
8.5 |
0.94 |
5.5 |
2.81 |
4 |
4.81 |
3.55 |
12 |
7 |
8 |
0.75 |
|
4 |
9 |
0.94 |
6.19 |
3 |
4.5 |
5.31 |
4.03 |
15 |
7.5 |
8 |
0.75 |
|
5 |
10 |
0.94 |
7.31 |
3.5 |
5.56 |
6.44 |
5.05 |
19 |
8.5 |
8 |
0.88 |
|
6 |
11 |
1 |
8.5 |
3.5 |
6.83 |
7.56 |
6.07 |
24 |
9.5 |
8 |
0.88 |
|
8 |
13.5 |
1.13 |
10.63 |
4 |
8.83 |
9.69 |
7.98 |
39 |
11.75 |
8 |
0.88 |
|
10 |
16 |
1.19 |
12.75 |
4 |
10.75 |
12 |
10.02 |
52 |
14.25 |
12 |
1 |
|
12 |
19 |
1.25 |
15 |
4.5 |
12.75 |
14.38 |
12 |
80 |
17 |
12 |
1 |
|
14 |
21 |
1.38 |
16.25 |
5 |
14 |
15.75 |
13.25 |
110 |
18.75 |
12 |
1.13 |
|
16 |
23.5 |
1.44 |
18.5 |
5 |
16 |
18 |
15.25 |
140 |
21.25 |
16 |
1.13 |
|
18 |
25 |
1.56 |
21 |
5.5 |
18 |
19.88 |
17.25 |
150 |
22.75 |
16 |
1.25 |
|
20 |
27.5 |
1.69 |
23 |
5.69 |
20 |
22 |
19.25 |
180 |
25 |
20 |
1.25 |
|
22 |
29.5 |
1.81 |
25.25 |
5.88 |
22 |
24.25 |
21.25 |
225 |
27.25 |
20 |
1.38 |
|
24 |
32 |
1.88 |
27.25 |
6 |
24 |
26.13 |
23.25 |
280 |
29.5 |
20 |
1.38 |
● The long-trapped hub of a welded flange triggers equal stress distribution across the flange-pipe connection.
● The extended neck ensures greater structural integrity.
● The structural design of this flange type ensures an obstruction-free flow of liquids and gases.
● Its design assists in minimizing turbulence while reducing the possible orientation of erosion.
● The associated flange-pipe joint is termed a ‘butt-weld joint,' which ensures almost zero leakages.
Types of Welded Flange
Blind Flange
Blind flanges are utilized when the space is limited or restricted for a threaded or lap joint connection. Socket welds have higher pressure ratings as they sink deeper into the end of the pipe. Lap joints are great for situations that require frequent dismantling as they fit loosely.
Long Welded Flange
The Long Welding Neck Flange is an enlarged version of the commonly used welding neck flange. It is frequently used as a nozzle for columns and barrels and comes in two types: the LWN Heavy Barrel and the Equal LWN Barrel. Both versions have a robust wall structure and unique shapes.
Reducing Welded Flange
A “Reducing Welded Flange” is not a distinct kind of flange. The term “reducing” generally indicates a flange that links pipes or fittings of varying sizes and is made to transform from a bigger pipe size to a smaller one. A “reducing flange” with a larger outer diameter (OD) on one side and a smaller OD on the other is used to connect pipes with different diameters.
Standard Welded Flange
A standard welded flange is a flange variety with a lengthy, conical neck that joins pipes via butt weld strengthening the joint and spreading the stress onto the pipe.
Welded Flange Materials
Carbon Steel
Carbon steel is a popular choice for weld neck flanges due to its strength, affordability, and weldability. It is suitable for a wide range of applications but may require protective coatings in corrosive environments.
Stainless Steel
Stainless steel offers excellent corrosion resistance, making it suitable for applications where corrosion is a concern. Different grades of stainless steel provide varying levels of strength and corrosion resistance.
Alloy Steel
Alloy steels contain additional alloying elements to enhance specific properties like strength, toughness, and corrosion resistance. They are commonly used in high-temperature and high-pressure applications.
Nickel Alloys
Nickel-based alloys like Inconel and Hastelloy are known for their exceptional corrosion resistance and high-temperature strength. They are often used in the chemical and petrochemical industries.
Specific Industrial Applications of Welded Flange
In offshore platforms, the flanges connect piping systems that transport oil and gas from the seabed to the surface. They can withstand harsh environmental conditions, including strong currents, corrosive saltwater, and challenging weather. They are widely used in refineries and processing plants in onshore oil and gas operations.
The petrochemical and chemical sectors frequently encounter high pressures, corrosive substances, and extreme temperatures. The flanges establish connections between pipes and valves used in refining and handling chemicals, petroleum, and gas. Due to their robust construction and ability to prevent leaks, they are well-suited for these challenging industrial applications.
Stainless steel flanges are preferred in pharmaceutical and food processing applications due to their corrosion resistance and ease of cleaning. They are also compatible with stringent cleaning agents and disinfectants. Their smooth surface finish minimizes the accumulation of residue and bacteria, facilitating sterilization procedures.
Thermal, nuclear, and renewable energy facilities heavily rely on flanges to establish secure connections in critical elements. These include steam lines, condensers, turbines, and other components. The flanges are also employed to guarantee leak-free joints and endure the effects of elevated temperatures and high pressures.
Welded flanges are employed in the fuel systems of ships and marine vessels. They connect the fuel pipelines, ensuring a secure transfer from storage tanks to engines. This is important given the criticality of fuel supply for propulsion and power generation in marine operations.
Order Process
Contact Customer Service
1
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Submit Order
2
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Obtain a Quote
3
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Confirm Order
4
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Arrange Payment
5
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Track Order
6
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Receive and Inspect Goods
7
Packaging and Shipping
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Packaging |
Loose package, Wooden cases |
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Transportation methods |
Road transport, rail transport, sea transport, air transport |
FAQ
We're well-known as one of the leading welded flange manufacturers and suppliers in China. If you're going to wholesale high quality welded flange, welcome to get more information from our factory. Also, custom service is available.
Long Weld Neck Flange, Socket Flange, Weld Neck Flange Welding