Pipe Flanges from Haihao: Your Partner for Reliable Solutions
Flanges are essential components in many industrial systems, designed to connect pipes, valves, pumps, and other equipment. Various types are available to suit different pressure levels, media, and installation needs.
Types of Flanges
Flanges are essential components in many industrial systems, designed to connect pipes, valves, pumps, and other equipment. Various types are available to suit different pressure levels, media, and installation needs.
Weld Neck Flange
Featuring a long, tapered neck welded directly to the pipe, this flange ensures a robust, leak-resistant joint. It's ideal for high-pressure applications in industries such as oil and gas, chemicals, and construction.
Blind Flange
A solid disk used to seal the end of a pipe or valve, providing a reliable closure point and easy access for maintenance. Commonly found in oil and gas, petrochemical, and water treatment systems.
Slip-on Flange
Designed to slide over the pipe and be welded in place, this flange offers ease of alignment and installation. It's widely used in petrochemical, oil and gas, and water treatment facilities.
Threaded Flange
With internal threads that screw onto the pipe, this flange allows quick and secure connections without welding. Frequently used in plumbing, water supply lines, and small-scale piping systems.
Socket Weld Flange
Built with a recessed socket for pipe insertion before welding, this type delivers a strong and leak-proof connection. Suitable for high-pressure and small-diameter piping in chemical plants, oil and gas systems, and power generation.
Lap Joint Flange
A two-piece assembly where the flange is loose and can rotate around the pipe, making it easy to align. Often used in low-pressure systems within food processing, pharmaceutical, and water treatment industries where disassembly is frequent.
Reducing Flange
Designed to connect pipes of different diameters, allowing smooth transitions in flow rate or equipment size. Typically used in refineries, chemical plants, and other settings requiring varied pipe sizes.
Available Flange Face Types
Flange face type plays a key role in ensuring proper sealing and compatibility with gaskets. Various options are available to meet specific application needs.
Raised Face
Features a slightly elevated surface around the bore, enhancing gasket compression for improved sealing. Common in oil and gas, chemical, and power generation industries handling high-pressure systems.
Flat Face
A smooth, even surface used with full-face gaskets, suitable for low-pressure environments. Often applied in plumbing, water supply, and general-purpose piping.
Ring Type Joint (RTJ)
Includes a precision-machined groove designed for metal ring gaskets, delivering leak-proof performance under extreme pressure and temperature. Widely used in oil and gas, refining, and petrochemical operations.
Flange Material Types
Material selection depends on the application's requirements and environmental conditions. We offer a diverse range of materials to meet various operational demands.
Carbon Steel Pipe Flanges
Constructed from robust and economical carbon steel, these flanges are widely used in oil and gas, water treatment, and construction for connecting pipes and equipment. Known for their durability and cost-efficiency, they suit a broad range of applications.
Available specifications include:
- A/SA105
- SA105N
- Fine Grain Practice
Options are available in low (0.05%–0.30%), medium (0.31%–0.80%), and high carbon steel (0.81%–2.1%) grades to match specific project requirements.
Stainless Steel Pipe Flanges
Widely known for their exceptional resistance to corrosion, they are the perfect choice for a wide range of applications.
304/304L
316/316L
304/H
321/H
347/H
317/L
310/S
Alloy Steel Flanges
Engineered for high-pressure and high-temperature environments, alloy steel flanges are commonly used in oil and gas, chemical processing, and power generation industries.
Types of Alloy Flanges
Alloy steel is created by combining carbon steel with elements like nickel, chromium, or molybdenum to enhance strength, durability, and resistance. It’s widely utilized in aerospace, automotive, and industrial machinery.
Available types include:
Slip-on
Weld-neck
Blind
Lap joint
Threaded
Socket weld
Nickel Alloy Flanges
Known for exceptional corrosion resistance, nickel alloy flanges are ideal for harsh environments in chemical processing, marine systems, and electronic components.
Chrome Alloy Flanges
Valued for their hardness, strength, and wear resistance, chrome alloy flanges are frequently used in automotive, plumbing, and decorative applications where durability and appearance are important.
Special Flanges and Fittings
For specialized applications, we provide a selection of unique flanges designed to meet specific performance and operational requirements.
Long Weld Neck Flanges
Featuring an extended neck for smooth and secure welding, these flanges offer a strong, leak-resistant connection. Commonly used in high-pressure and critical systems within the oil and gas, chemical, and construction industries.
Spectacle Flanges
Designed with a metal plate connecting two flanges, this type allows easy diversion or interruption of flow in pipelines. Ideal for maintenance and inspection in oil and gas, petrochemical, and chemical processing systems.
Orifice Flanges
Incorporating a precision orifice for measuring flow or regulating pressure, these flanges are essential in flow measurement and control applications, particularly in oil refineries and gas processing facilities.