Weld Neck Flanges – Duplex & Super Duplex | Duplex Weld Neck Flanges Manufacturer, Supplier & Exporter in India | Maruti International

Duplex & Super Duplex Weld Neck Flanges Manufacturer in India

Maruti International is a leading Duplex Weld Neck Flanges Manufacturer in India, Super Duplex Weld Neck Flanges Supplier in India, and globally recognized Duplex Weld Neck Flanges Exporter in India, offering premium-quality flange solutions designed for high-pressure, high-temperature, and highly corrosive industrial applications. Our Duplex and Super Duplex Weld Neck Flanges are manufactured using advanced forging technologies, precision machining, and stringent quality control procedures to ensure exceptional durability, superior corrosion resistance, and outstanding mechanical performance.

As a trusted Duplex Stainless Steel Weld Neck Flanges Exporter, Maruti International supplies world-class products to customers operating in oil and gas, petrochemical, offshore, marine, desalination, power generation, chemical processing, water treatment, fertilizer, pulp and paper, pharmaceutical, and heavy engineering industries.

Manufactured according to ASTM, ASME, ANSI, DIN, EN, BS, ISO, and JIS standards, our Duplex and Super Duplex Weld Neck Flanges provide long-lasting performance in the most demanding industrial environments.

Maruti International has earned recognition as a reliable Duplex Weld Neck Flanges Supplier in Mumbai and a dependable Super Duplex Flanges Exporter from India, serving clients across the Middle East, Europe, Asia, Africa, North America, South America, and Oceania.

What are Duplex & Super Duplex Weld Neck Flanges?

Weld Neck Flanges are among the most widely used flange types in industrial piping systems. These flanges feature a long tapered hub that gradually transfers stress from the flange to the pipe, reducing stress concentration and improving structural integrity.

Weld Neck Flanges are designed to be butt-welded directly to the pipe, creating a strong, durable, and leak-proof connection. They are particularly suitable for severe service conditions involving high pressure, fluctuating temperatures, vibration, and corrosive environments.

Duplex Weld Neck Flanges are manufactured from Duplex Stainless Steel grades possessing a balanced ferritic-austenitic microstructure. This composition delivers exceptional mechanical strength, excellent resistance to chloride attack, and superior corrosion resistance.

Super Duplex Weld Neck Flanges contain higher levels of chromium, molybdenum, and nitrogen, offering outstanding resistance to pitting corrosion, crevice corrosion, erosion, and stress corrosion cracking.

At Maruti International, we manufacture high-quality ASTM A182 Duplex Weld Neck Flanges and ASTM A182 Super Duplex Weld Neck Flanges for critical industrial applications worldwide.

Duplex Weld Neck Flanges Exporter in India

Maruti International is among the most trusted Duplex Weld Neck Flanges Exporters in India, supplying premium-quality flange solutions to domestic and international markets.

We manufacture and export:

• Duplex S31803 Weld Neck Flanges

• Duplex S32205 Weld Neck Flanges

• ASTM A182 F51 Weld Neck Flanges

• ASTM A182 F60 Weld Neck Flanges

• Super Duplex S32750 Weld Neck Flanges

• Super Duplex S32760 Weld Neck Flanges

• ASTM A182 F53 Weld Neck Flanges

• ASTM A182 F55 Weld Neck Flanges

• Forged Duplex Weld Neck Flanges

• Raised Face Weld Neck Flanges

• Flat Face Weld Neck Flanges

• RTJ Weld Neck Flanges

• ASME B16.5 Weld Neck Flanges

• ANSI Duplex Weld Neck Flanges

• Heavy Duty Super Duplex Weld Neck Flanges

• Customized Duplex Weld Neck Flanges

As a reliable Super Duplex Weld Neck Flanges Manufacturer in India, we maintain stringent manufacturing standards and comprehensive quality assurance systems.

Features of Duplex & Super Duplex Weld Neck Flanges

Maruti International manufactures Duplex and Super Duplex Weld Neck Flanges with precision engineering and advanced production technologies.

Key Features

• Exceptional corrosion resistance

• Superior pitting resistance

• Excellent crevice corrosion resistance

• Outstanding chloride resistance

• Excellent stress corrosion cracking resistance

• High tensile strength

• Superior yield strength

• Outstanding impact toughness

• Excellent fatigue resistance

• Excellent structural integrity

• Superior pressure-bearing capability

• Leak-proof welded connections

• Smooth machined surface finish

• Excellent dimensional accuracy

• High-temperature resistance

• Superior oxidation resistance

• Long service life

• Reduced maintenance costs

• Excellent weldability

• Manufactured according to international standards

Advantages of Duplex & Super Duplex Weld Neck Flanges

Outstanding Corrosion Resistance

Duplex and Super Duplex materials provide exceptional resistance against chlorides, seawater, acids, and corrosive industrial chemicals.

High Mechanical Strength

Duplex stainless steel offers nearly twice the yield strength compared to conventional austenitic stainless steels.

Superior Structural Stability

The tapered hub design efficiently distributes stress and minimizes fatigue.

Excellent Pressure Resistance

Suitable for high-pressure and critical process piping systems.

Enhanced Service Life

Excellent resistance to corrosion extends operational performance.

Reduced Maintenance Requirements

Long-term durability lowers maintenance and replacement costs.

Reliable Leak-Proof Performance

Butt-welded connections ensure secure and dependable sealing.

Excellent Offshore Performance

Ideal for harsh marine and offshore operating conditions.

Duplex & Super Duplex Weld Neck Flanges Specifications

Maruti International manufactures Duplex and Super Duplex Weld Neck Flanges in numerous dimensions and pressure classes.

Material Grades

Duplex Stainless Steel

• UNS S31803

• UNS S32205

• Duplex 2205

• ASTM A182 F51

• ASTM A182 F60

Super Duplex Stainless Steel

• UNS S32750

• UNS S32760

• Super Duplex 2507

• ASTM A182 F53

• ASTM A182 F55

Standards

• ASTM A182

• ASME B16.5

• ASME B16.47

• ANSI

• DIN

• EN

• ISO

• BS

• JIS

Pressure Ratings

• Class 150

• Class 300

• Class 400

• Class 600

• Class 900

• Class 1500

• Class 2500

Size Range

• ½" NB to 60" NB

• DN15 to DN1500

Facing Types

• Raised Face (RF)

• Flat Face (FF)

• Ring Type Joint (RTJ)

Surface Finish

• CNC Machined Finish

• Satin Finish

• Polished Finish

• Pickled Finish

• Mirror Finish

Duplex & Super Duplex Weld Neck Flanges Grades

Duplex S31803 Weld Neck Flanges

Suitable for marine systems, chemical processing, and industrial piping applications.

Duplex S32205 Weld Neck Flanges

Provide superior strength and outstanding chloride corrosion resistance.

ASTM A182 F51 Weld Neck Flanges

Manufactured according to ASTM specifications for demanding industrial applications.

ASTM A182 F60 Weld Neck Flanges

Offer excellent resistance to aggressive operating conditions.

Super Duplex S32750 Weld Neck Flanges

Ideal for seawater handling systems and offshore installations.

Super Duplex S32760 Weld Neck Flanges

Designed for highly corrosive and high-pressure service environments.

ASTM A182 F53 Weld Neck Flanges

Deliver superior corrosion resistance and long service life.

ASTM A182 F55 Weld Neck Flanges

Suitable for critical applications requiring maximum corrosion protection.

Chemical Composition

Duplex S32205

• Chromium (Cr): 22–23%

• Nickel (Ni): 4.5–6.5%

• Molybdenum (Mo): 3–3.5%

• Nitrogen (N): 0.14–0.20%

• Iron (Fe): Balance

Super Duplex S32750

• Chromium (Cr): 24–26%

• Nickel (Ni): 6–8%

• Molybdenum (Mo): 3–5%

• Nitrogen (N): 0.24–0.32%

• Copper (Cu): Maximum 0.50%

• Iron (Fe): Balance

Mechanical Properties

Duplex and Super Duplex Weld Neck Flanges exhibit exceptional mechanical characteristics.

Properties Include

• High tensile strength

• Superior yield strength

• Excellent hardness

• Outstanding toughness

• Superior fatigue resistance

• Excellent impact strength

• Enhanced wear resistance

• Excellent structural stability

Applications of Duplex & Super Duplex Weld Neck Flanges

Maruti International Duplex and Super Duplex Weld Neck Flanges are widely utilized in numerous industrial sectors.

Oil & Gas Industry

Used in pipelines, offshore platforms, gas processing facilities, and refineries.

Petrochemical Industry

Suitable for hydrocarbon processing systems and chemical plants.

Offshore Industry

Engineered for severe offshore and subsea environments.

Marine Industry

Outstanding seawater resistance ensures dependable long-term performance.

Chemical Processing Plants

Ideal for corrosive chemicals, chlorides, acids, and solvents.

Desalination Plants

Extensively used in seawater desalination systems.

Water Treatment Plants

Provide reliable operation in aggressive water treatment facilities.

Power Generation

Applied in condensers, cooling systems, and industrial utilities.

Pharmaceutical Industry

Used in hygienic process piping and critical manufacturing systems.

Fertilizer Industry

Suitable for highly corrosive fertilizer production environments.

Pulp & Paper Industry

Excellent resistance to process chemicals and aggressive media.

Manufacturing Process

Maruti International follows advanced manufacturing procedures to produce high-quality Weld Neck Flanges.

Production stages include:

• Raw material inspection

• Forging

• Heat treatment

• CNC machining

• Hub machining

• Facing operations

• Drilling

• Surface finishing

• Dimensional inspection

• Positive Material Identification (PMI)

• Ultrasonic Testing

• Dye Penetrant Testing

• Final inspection

• Export packaging

Quality Assurance

Each Duplex and Super Duplex Weld Neck Flange undergoes rigorous quality inspection.

Testing includes:

• Chemical analysis

• Mechanical testing

• Tensile testing

• Hardness testing

• Positive Material Identification

• Ultrasonic Testing (UT)

• Dye Penetrant Testing (DPT)

• Dimensional inspection

• Surface examination

• Visual verification

Mill Test Certificates (MTC) are provided with every shipment.

Duplex Weld Neck Flanges Supplier Across India

Maruti International supplies Duplex and Super Duplex Weld Neck Flanges throughout India.

Maharashtra

Mumbai, Pune, Navi Mumbai, Thane, Nashik, Aurangabad, Nagpur, Kolhapur, Sangli, Solapur and Satara.

Gujarat

Ahmedabad, Surat, Vadodara, Rajkot, Jamnagar, Bharuch, Ankleshwar, Gandhidham, Bhavnagar and Vapi.

Tamil Nadu

Chennai, Coimbatore, Salem, Tiruppur, Hosur, Madurai, Trichy and Erode.

Karnataka

Bengaluru, Mysore, Hubli, Belgaum and Mangalore.

Telangana

Hyderabad, Warangal and Karimnagar.

Andhra Pradesh

Visakhapatnam, Vijayawada, Kakinada and Guntur.

Kerala

Kochi, Thrissur, Kozhikode and Kollam.

Delhi NCR

New Delhi, Noida, Greater Noida, Gurugram, Faridabad and Ghaziabad.

Punjab

Ludhiana, Mohali, Chandigarh and Jalandhar.

Rajasthan

Jaipur, Udaipur, Jodhpur, Ajmer and Kota.

Uttar Pradesh

Kanpur, Lucknow, Agra, Meerut and Varanasi.

Madhya Pradesh

Indore, Bhopal and Jabalpur.

Odisha

Bhubaneswar, Paradip and Rourkela.

Chhattisgarh

Raipur and Bhilai.

West Bengal

Kolkata, Howrah and Durgapur.

Uttarakhand

Haridwar, Dehradun and Rudrapur.

Duplex Weld Neck Flanges Exporter Worldwide

Maruti International exports Duplex and Super Duplex Weld Neck Flanges to international markets.

Middle East

UAE, Saudi Arabia, Qatar, Oman, Kuwait and Bahrain.

Europe

Germany, France, Italy, Spain, Belgium, Netherlands and Poland.

Asia

Singapore, Malaysia, Indonesia, Thailand, Vietnam and South Korea.

Africa

South Africa, Egypt, Nigeria, Kenya and Tanzania.

North America

United States, Canada and Mexico.

South America

Brazil, Chile and Argentina.

Oceania

Australia and New Zealand.

Why Choose Maruti International?

Maruti International is recognized as a trusted Duplex Weld Neck Flanges Manufacturer in India because of our commitment to engineering excellence and product quality.

Premium Quality Materials

Certified Duplex and Super Duplex stainless steel sourced from approved manufacturers.

Advanced Manufacturing Facilities

Modern forging and CNC machining technologies ensure precision-engineered products.

International Standards Compliance

Products are manufactured according to ASTM, ASME, ANSI, DIN, EN, BS, ISO, and JIS standards.

Customized Manufacturing

Available according to customer specifications, drawings, and project requirements.

Competitive Pricing

High-quality flange solutions at cost-effective prices.

Worldwide Export Capability

Efficient logistics support for global deliveries.

Technical Expertise

Professional engineering guidance for selecting suitable flange solutions.

Timely Delivery

Strong inventory management and production planning ensure prompt shipments.

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Maruti International – Leading Duplex & Super Duplex Weld Neck Flanges Exporter in India

Maruti International is a trusted Duplex Weld Neck Flanges Manufacturer, Supplier, and Exporter in India, delivering premium-quality flange solutions for highly corrosive and critical industrial applications. With advanced manufacturing capabilities, stringent quality assurance systems, international certifications, and extensive export expertise, we provide products that deliver superior performance, durability, and reliability.

Whether you require a dependable Duplex Weld Neck Flanges Manufacturer in Mumbai, a reliable Super Duplex Weld Neck Flanges Supplier in India, or an experienced Weld Neck Flanges Exporter, Maruti International offers world-class products supported by engineering excellence, competitive pricing, customized manufacturing capabilities, and timely worldwide deliveries.