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Duplex Steel Flanges

Dimensions: 1/2”, 2”, 3”, 4”, 6”, 8”, 10”, Customized up to 60”
Material: Duplex Stainless Steel 2205, 2507, S31803, S32205, S32750, S32760
Thickness: Schedule 10(S) to SCH 160
Standard: ASME, ANSI, DIN, JIS, EN, GOST etc.
Class Range: Class 150 to 2500 (# or LB), PN 2.5 to PN 250
Flange Face Type: RF, FF, RTJ, MFM, TG
Connection: Butt Weld, Socket Weld, Threaded or Lap Joint
Manufacturing Process: Forging

Duplex steel flanges provide excellent corrosion resistance, high mechanical strength, reliable sealing performance, and long service life. They are suitable for chloride-containing, high-pressure, corrosive, and demanding piping systems.

They comply with standards such as ASME B16.5, ASME B16.47, EN 1092-1, DIN, JIS, and GOST. Common materials include ASTM A182 F51, F53, F55, F60, and F61.

Widely used in oil and gas, offshore engineering, chemical processing, desalination, marine, pulp and paper, water treatment, and industrial piping systems.
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Product Description

Duplex steel flange Descriptions

Duplex steel flange is a flange made of duplex stainless steel raw materials. Due to the excellent properties of the material itself, duplex steel flanges have high strength, good corrosion resistance, and reliable sealing performance. They are especially suitable for harsh industrial pipeline environments requiring both mechanical strength and corrosion resistance.

Here is a detailed feature and performance table for duplex steel flanges:

Feature/Performance Description
Type weld neck flanges, slip-on flanges, blind flanges, lap joint flanges, socket weld flanges, threaded flanges
Material ASTM A182 F51, F53, F55, F60, F61, Duplex 2205, Super Duplex 2507, UNS S31803, S32205, S32750, S32760
Sizes 1/2” – 60”
Pressure Class75, Class150, Class300, Class400, Class600, Class900, Class1500, Class2500
Common Standards ANSI/ASME B16.5, ANSI/ASME B16.47, EN 1092-1, JIS B2220
flange face Raised face (RF), flat face (FF), ring joint (RTJ), male and female (MFM), tongue and groove (TG)
Connection Methods Bolted connections, welded connections, combined welded and bolted connections, quick clamp or swivel connections, etc.
Advantageous High strength, excellent pitting and crevice corrosion resistance, good chloride resistance, strong pressure resistance, long service life
Production process Forging, heat treatment, and machining \nIngot billets and round bars – Chemical element analysis – Band saw cutting – Forging – Heat treatment – Inspection – Blank stock – Lathes – Deep hole drilling – Inspection – Marking – Packing in plywood
Product Testing Direct Reading Spectrometer, Hydrostatic Pressure Tester, X-ray Flaw Detector, UT Ultrasonic Flaw Detector, Magnetic Particle Flaw Detector \nEach product has its own quality certificate and can also be tested by a third party.
Production equipment Unloading machines, forging hammers, presses, flange molds, heat treatment furnaces, machining lathes, high-speed drilling machines, marking and typing machines, etc.
Application Duplex steel flanges are widely used in various industrial applications due to their high strength, corrosion resistance, and durability. They are utilized in industries such as oil and gas, offshore platforms, chemical processing, desalination, seawater systems, marine engineering, pulp and paper, water treatment, and industrial piping systems.

Description

Advantages of Duplex Steel Flanges

Excellent Corrosion Resistance

Duplex steel flanges offer excellent resistance to pitting, crevice corrosion, stress corrosion cracking, and chloride-containing environments, making them suitable for demanding industrial applications.

High Strength and Durability

They provide higher mechanical strength than conventional austenitic stainless steel flanges, allowing reliable performance under high-pressure and heavy-duty operating conditions.

Reliable Sealing Performance

Precision-machined sealing faces help create secure, stable, and leak-resistant pipe connections in critical piping systems.

Good Temperature Resistance

Duplex steel flanges maintain dependable mechanical properties across a wide range of operating temperatures and provide stable performance in demanding process environments.

Excellent Chloride Resistance

Their duplex microstructure provides strong resistance to chloride-induced stress corrosion cracking, making them suitable for seawater, offshore, and desalination systems.

Long Service Life and Low Maintenance

The combination of high strength and excellent corrosion resistance reduces maintenance frequency, replacement costs, and system downtime.

Advantages of Duplex Steel Flanges

 

Applications

Oil and Gas Industry

Duplex steel flanges are widely used in oil and gas pipelines, offshore platforms, subsea systems, and processing equipment. Their high strength and excellent resistance to chloride corrosion make them suitable for harsh operating environments.

Chemical Processing

Duplex steel flanges provide excellent resistance to corrosive chemicals, acids, and aggressive fluids. They are commonly used in chemical plants, refineries, reactors, and industrial piping systems.

Desalination and Water Treatment

Duplex steel flanges are widely used in desalination plants, seawater treatment systems, water supply, wastewater treatment, and filtration systems. Their strong resistance to pitting and crevice corrosion ensures long service life in wet and chloride-rich environments.

Marine Industry

Duplex steel flanges are suitable for ships, offshore facilities, seawater piping systems, and marine engineering projects. Their excellent resistance to seawater corrosion helps reduce maintenance requirements.

Power Generation

Duplex steel flanges are used in cooling water systems, auxiliary piping systems, and industrial utility pipelines in power plants. They provide dependable connections under high-pressure and corrosive service conditions.

Pulp and Paper Industry

Duplex steel flanges are also used in pulp and paper processing systems where corrosion resistance, durability, and stable performance are required in aggressive media environments.

Applications

PRODUCTION PROCESS

Our carbon steel flanges are manufactured through a controlled production process from raw material inspection to final shipment. Every step is traceable through material identification, process records, dimensional inspection, heat treatment records, and final quality control.

This production process ensures stable quality, accurate dimensions, reliable sealing performance, and compliance with project specifications.

PRODUCTION PROCESS

Why Choose Us

Comprehensive Fabricating Capabilities

We coordinated manufacturing, warm treatment, machining, testing, and bundling beneath one roof. You get steady quality control all through the whole generation process.

International Standards Compliance

Our products">products meet ASME, EN, DIN, JIS, and GOST standards. You can specify the exact requirements for your regional applications with confidence.

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Extensive Estimate Run

From DN15 to DN4000, we cover essentially all mechanical necessities. Your ventures advantage from single-source obtainment convenience.

Quality Affirmation

Progressed testing offices guarantee each product meets details. You get certified items with total traceability documentation.

Global Trade Involvement

Our items serve markets over Europe and the Americas. You work with demonstrated providers who get it worldwide quality expectations.

Competitive Preferences

Prevalent quality, competitive estimating, secure bundling, and quick conveyance combine to back your extend timelines and budgets.

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Why Choose Us


COMPANY PROFILE

Shanxi HongKai Forging Co., Ltd. Was located in Dingxiang County, known as the "Hometown of Forging Flanges" in Shanxi Province, which is part of Chinese energy and heavy chemical industrial base. The area boasts convenient transportation, abundant coal and power resources, fast communication, and an excellent environment. The company has three big workshops in total. We have 20 years experiences in flanges and forging industry, we can produce 20, 000MT per year. We have strength capacity to produce the flange in every process.

Along with capabilities in forging and heat treatment, integrated production capabilities including machining, physical and chemical testing, surface treatment, and packaging and shipment. Possessing solid technical expertise, advanced production processes, and a complete quality inspection, reliable after-sales service, for customers worldwide and domestically multiple clients have provided a solid foundation for collaboration.

The flanges manufactured by our company comply with the American standard ASME B16.5/B16.47, European Standard EN1092-1, German Standard DIN, Japanese Standard JIS, Russian

Applications Oil and Gas Industry Duplex steel flanges are widely used in oil and gas pipelines, offshore platforms, subsea systems, and processing equipment. Their high strength and excellent resistance to chloride corrosion make them suitable for harsh operating environments. Chemical Processing Duplex steel flanges provide excellent resistance to corrosive chemicals, acids, and aggressive fluids. They are commonly used in chemical plants, refineries, reactors, and industrial piping systems. Desalination and Water Treatment Duplex steel flanges are widely used in desalination plants, seawater treatment systems, water supply, wastewater treatment, and filtration systems. Their strong resistance to pitting and crevice corrosion ensures long service life in wet and chloride-rich environments. Marine Industry Duplex steel flanges are suitable for ships, offshore facilities, seawater piping systems, and marine engineering projects. Their excellent resistance to seawater corrosion helps reduce maintenance requirements. Power Generation Duplex steel flanges are used in cooling water systems, auxiliary piping systems, and industrial utility pipelines in power plants. They provide dependable connections under high-pressure and corrosive service conditions. Pulp and Paper Industry Duplex steel flanges are also used in pulp and paper processing systems where corrosion resistance, durability, and stable performance are required in aggressive media environments.
 
Applications Oil and Gas Industry Duplex steel flanges are widely used in oil and gas pipelines, offshore platforms, subsea systems, and processing equipment. Their high strength and excellent resistance to chloride corrosion make them suitable for harsh operating environments. Chemical Processing Duplex steel flanges provide excellent resistance to corrosive chemicals, acids, and aggressive fluids. They are commonly used in chemical plants, refineries, reactors, and industrial piping systems. Desalination and Water Treatment Duplex steel flanges are widely used in desalination plants, seawater treatment systems, water supply, wastewater treatment, and filtration systems. Their strong resistance to pitting and crevice corrosion ensures long service life in wet and chloride-rich environments. Marine Industry Duplex steel flanges are suitable for ships, offshore facilities, seawater piping systems, and marine engineering projects. Their excellent resistance to seawater corrosion helps reduce maintenance requirements. Power Generation Duplex steel flanges are used in cooling water systems, auxiliary piping systems, and industrial utility pipelines in power plants. They provide dependable connections under high-pressure and corrosive service conditions. Pulp and Paper Industry Duplex steel flanges are also used in pulp and paper processing systems where corrosion resistance, durability, and stable performance are required in aggressive media environments.
 
Applications Oil and Gas Industry Duplex steel flanges are widely used in oil and gas pipelines, offshore platforms, subsea systems, and processing equipment. Their high strength and excellent resistance to chloride corrosion make them suitable for harsh operating environments. Chemical Processing Duplex steel flanges provide excellent resistance to corrosive chemicals, acids, and aggressive fluids. They are commonly used in chemical plants, refineries, reactors, and industrial piping systems. Desalination and Water Treatment Duplex steel flanges are widely used in desalination plants, seawater treatment systems, water supply, wastewater treatment, and filtration systems. Their strong resistance to pitting and crevice corrosion ensures long service life in wet and chloride-rich environments. Marine Industry Duplex steel flanges are suitable for ships, offshore facilities, seawater piping systems, and marine engineering projects. Their excellent resistance to seawater corrosion helps reduce maintenance requirements. Power Generation Duplex steel flanges are used in cooling water systems, auxiliary piping systems, and industrial utility pipelines in power plants. They provide dependable connections under high-pressure and corrosive service conditions. Pulp and Paper Industry Duplex steel flanges are also used in pulp and paper processing systems where corrosion resistance, durability, and stable performance are required in aggressive media environments.
 
Applications Oil and Gas Industry Duplex steel flanges are widely used in oil and gas pipelines, offshore platforms, subsea systems, and processing equipment. Their high strength and excellent resistance to chloride corrosion make them suitable for harsh operating environments. Chemical Processing Duplex steel flanges provide excellent resistance to corrosive chemicals, acids, and aggressive fluids. They are commonly used in chemical plants, refineries, reactors, and industrial piping systems. Desalination and Water Treatment Duplex steel flanges are widely used in desalination plants, seawater treatment systems, water supply, wastewater treatment, and filtration systems. Their strong resistance to pitting and crevice corrosion ensures long service life in wet and chloride-rich environments. Marine Industry Duplex steel flanges are suitable for ships, offshore facilities, seawater piping systems, and marine engineering projects. Their excellent resistance to seawater corrosion helps reduce maintenance requirements. Power Generation Duplex steel flanges are used in cooling water systems, auxiliary piping systems, and industrial utility pipelines in power plants. They provide dependable connections under high-pressure and corrosive service conditions. Pulp and Paper Industry Duplex steel flanges are also used in pulp and paper processing systems where corrosion resistance, durability, and stable performance are required in aggressive media environments.
 
baiduimg.Applications Oil and Gas Industry Duplex steel flanges are widely used in oil and gas pipelines, offshore platforms, subsea systems, and processing equipment. Their high strength and excellent resistance to chloride corrosion make them suitable for harsh operating environments. Chemical Processing Duplex steel flanges provide excellent resistance to corrosive chemicals, acids, and aggressive fluids. They are commonly used in chemical plants, refineries, reactors, and industrial piping systems. Desalination and Water Treatment Duplex steel flanges are widely used in desalination plants, seawater treatment systems, water supply, wastewater treatment, and filtration systems. Their strong resistance to pitting and crevice corrosion ensures long service life in wet and chloride-rich environments. Marine Industry Duplex steel flanges are suitable for ships, offshore facilities, seawater piping systems, and marine engineering projects. Their excellent resistance to seawater corrosion helps reduce maintenance requirements. Power Generation Duplex steel flanges are used in cooling water systems, auxiliary piping systems, and industrial utility pipelines in power plants. They provide dependable connections under high-pressure and corrosive service conditions. Pulp and Paper Industry Duplex steel flanges are also used in pulp and paper processing systems where corrosion resistance, durability, and stable performance are required in aggressive media environments.
 
Applications Oil and Gas Industry Duplex steel flanges are widely used in oil and gas pipelines, offshore platforms, subsea systems, and processing equipment. Their high strength and excellent resistance to chloride corrosion make them suitable for harsh operating environments. Chemical Processing Duplex steel flanges provide excellent resistance to corrosive chemicals, acids, and aggressive fluids. They are commonly used in chemical plants, refineries, reactors, and industrial piping systems. Desalination and Water Treatment Duplex steel flanges are widely used in desalination plants, seawater treatment systems, water supply, wastewater treatment, and filtration systems. Their strong resistance to pitting and crevice corrosion ensures long service life in wet and chloride-rich environments. Marine Industry Duplex steel flanges are suitable for ships, offshore facilities, seawater piping systems, and marine engineering projects. Their excellent resistance to seawater corrosion helps reduce maintenance requirements. Power Generation Duplex steel flanges are used in cooling water systems, auxiliary piping systems, and industrial utility pipelines in power plants. They provide dependable connections under high-pressure and corrosive service conditions. Pulp and Paper Industry Duplex steel flanges are also used in pulp and paper processing systems where corrosion resistance, durability, and stable performance are required in aggressive media environments.
 

FAQ

What are Duplex Steel Flanges?

Duplex Steel Flanges are forged pipe connection components made from duplex stainless steel materials such as ASTM A182 F51, F53, F55, F60, and F61. They offer high strength, excellent corrosion resistance, and reliable performance in demanding industrial applications.

What are the main advantages of Duplex Steel Flanges?

Duplex Steel Flanges provide high mechanical strength, excellent pitting and crevice corrosion resistance, good chloride resistance, and reliable sealing performance in harsh working environments.

What types of Duplex Steel Flanges are available?

We supply various types of Duplex Steel Flanges, including Weld Neck Flanges, Blind Flanges, Slip On Flanges, Socket Weld Flanges, Threaded Flanges, Lap Joint Flanges, and Long Weld Neck Flanges.

What standards are Duplex Steel Flanges manufactured according to?

Duplex Steel Flanges can be manufactured according to international standards such as ASME B16.5, ASME B16.47, EN 1092-1, DIN, JIS, and GOST standards.

What materials are commonly used for Duplex Steel Flanges?

Common materials include ASTM A182 F51, F53, F55, F60, and F61, as well as Duplex 2205, Super Duplex 2507, UNS S31803, S32205, S32750, and S32760.

Where are Duplex Steel Flanges used?

Duplex Steel Flanges are widely used in oil and gas, offshore engineering, chemical processing, desalination, marine systems, water treatment, pulp and paper, and industrial piping systems.

Can Duplex Steel Flanges be customized?

Yes. We can manufacture customized Duplex Steel Flanges according to customer drawings, specifications, dimensions, and project requirements.

Do you provide inspection documents for Duplex Steel Flanges?

Yes. Material Test Certificates (MTC), dimensional inspection reports, PMI reports, and other quality documents can be provided according to customer requirements.

Contact Us

Quality Duplex Steel Flanges solutions ensure your piping systems operate safely and efficiently for years to come.Ready to discuss your product requirements? Contact our technical team at kevin.zhao@hkflange.com for expert guidance and competitive p

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