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Stainless Steel Weld Neck Flanges – Leading Manufacturer & Supplier in India

What are Stainless Steel Weld Neck Flanges?

Stainless Steel Weld Neck Flanges (WNRF Flanges) are high-strength, butt-welded pipe flanges designed to provide superior structural support and leak-proof connections in high-pressure and high-temperature applications. The long tapered neck allows for even distribution of stress, making them ideal for critical piping systems in industries like oil & gas, petrochemicals, power plants, and marine applications.

Weld neck flanges are available in various stainless steel grades, including SS 304, SS 316, SS 321, SS 347, SS 310, and SS 904L, ensuring excellent corrosion resistance and durability.

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Why Choose Stainless Steel Weld Neck Flanges?

Superior Strength & Structural Integrity – Weld neck flanges are designed to withstand high-pressure and high-temperature conditions, providing maximum strength and reliability.
Leak-Proof & Secure Connections – The butt-welded design ensures a seamless connection, reducing the risk of leaks and structural failures.
Exceptional Corrosion Resistance – Manufactured from high-quality stainless steel, these flanges offer excellent resistance to oxidation, pitting, and crevice corrosion, even in harsh chemical and marine environments.
Smooth Fluid Flow & Stress Distribution – The tapered hub design minimizes turbulence and erosion, ensuring smooth fluid flow and reduced stress concentration in piping systems.
Ideal for High-Temperature Applications – With the ability to withstand extreme heat and pressure, stainless steel weld neck flanges are perfect for boilers, heat exchangers, and power plants.

Stainless Steel Weld Neck Flanges Manufacturer in India

As a trusted Stainless Steel Weld Neck Flanges Manufacturer in India, we provide:

Precision-engineered WNRF flanges in various sizes & pressure ratings.
Customization options to meet industry-specific needs.
Third-party testing & certifications for assured quality.
Global export and on-time delivery for bulk orders.

Applications of Stainless Steel Weld Neck Flanges

These flanges are widely used in high-pressure and high-temperature environments, including:

Oil & Gas Refineries – Ideal for high-pressure fluid transfer pipelines.
Petrochemical & Chemical Processing – Ensures safe handling of corrosive chemicals.
Power Plants & Boilers – Suitable for high-temperature steam pipelines.
Marine & Offshore – Withstands harsh saltwater environments.
Food & Beverage Industry – Used in hygienic processing systems.

Key Features of Stainless Steel Weld Neck Flanges

Leak-proof connection with butt-welded design.
Long service life with superior corrosion resistance.
Available in multiple pressure ratings from 150# to 2500#.
Smooth fluid flow with minimal turbulence.
Compliant with ASTM, ASME, and ANSI standards.

Specifications of Stainless Steel Weld Neck Flanges

Specification	Details
Material Grade	Stainless Steel 304, 316, 321, 347, 310, 904L
Standard	ASTM A182 / ASME SA182
Size Range	½” to 48” (DN15 to DN1200)
Pressure Ratings	150#, 300#, 600#, 900#, 1500#, 2500#
Face Type	RF (Raised Face), FF (Flat Face), RTJ (Ring Type Joint)
Connection Type	Butt-Welded
Temperature Resistance	High-temperature applications up to 1200°C
Corrosion Resistance	Excellent resistance to oxidation, acids, and seawater

Chemical Composition of Stainless Steel Weld Neck Flanges

Element	Composition (%)
Carbon (C)	0.08 max (varies by grade)
Manganese (Mn)	2.00 max
Phosphorus (P)	0.045 max
Sulfur (S)	0.030 max
Silicon (Si)	1.00 max
Chromium (Cr)	16.0 – 21.0
Nickel (Ni)	8.0 – 28.0
Molybdenum (Mo)	2.00 – 5.00 (varies by grade)
Copper (Cu)	1.0 – 2.0 (in 904L)

Mechanical Properties of Stainless Steel Weld Neck Flanges

Property	Value
Tensile Strength	485 – 590 MPa (varies by grade)
Yield Strength	170 – 300 MPa
Elongation	30 – 40%
Hardness (Brinell)	217 max
Hardness (Rockwell B)	95 max

Stainless Steel Weld Neck Flanges Export Destinations

Region	Countries
Middle East	UAE, Saudi Arabia, Qatar, Oman, Kuwait, Turkey
Asia	India, Singapore, Malaysia, Thailand, Vietnam, South Korea, Japan
South America	Argentina, Brazil, Chile, Colombia, Venezuela
North America	USA, Canada, Mexico, Panama
Europe	UK, Germany, France, Italy, Spain, Netherlands, Russia
Africa	Nigeria, South Africa, Egypt, Algeria

Stainless Steel Weld Neck Flanges Supply in Indian States & Cities

State	Major Cities
Maharashtra	Mumbai, Pune, Nashik, Nagpur
Gujarat	Ahmedabad, Surat, Vadodara
Tamil Nadu	Chennai
Telangana	Hyderabad
Karnataka	Bengaluru
West Bengal	Kolkata
Uttar Pradesh	Kanpur, Noida
Andhra Pradesh	Vishakhapatnam, Vijayawada
Union Territories	Delhi, Chandigarh

Buy High-Quality Stainless Steel Weld Neck Flanges in India

Looking for top-quality SS Weld Neck Flanges? We offer a wide range of WNRF flanges with certified quality, corrosion resistance, and durability. Contact us today for competitive pricing and bulk orders!

Frequently Asked Questions - stainless steel weld neck flanges

− 1. What is a Stainless Steel Weld Neck Flange, and how does it work?

A Weld Neck Flange is a type of flange with a long tapered hub that is welded to a pipe. This design helps reduce stress concentration, making it ideal for high-pressure and high-temperature applications. The butt-weld connection ensures a strong, leak-proof joint.

+ 2. What are the advantages of using Stainless Steel Weld Neck Flanges?

Key benefits include:

Superior strength and durability
Excellent resistance to corrosion and high temperatures
Leak-proof connection due to full penetration welding
Smooth transition from flange to pipe reduces turbulence and erosion
Suitable for high-pressure and high-temperature environments

+ 3. What are the different types of Weld Neck Flanges?

Standard Weld Neck Flange: Used in general industrial applications
Long Weld Neck Flange (LWN): Extended hub for special applications
Reducing Weld Neck Flange: Used to connect pipes of different diameters

+ 4. Where are Stainless Steel Weld Neck Flanges commonly used?

: These flanges are widely used in industries such as:

Oil & Gas pipelines
Chemical and Petrochemical processing
Power Plants and Nuclear Facilities
Marine and Offshore applications
Boilers, Heat Exchangers, and Pressure Vessels

+ 5. What grades of stainless steel are used for Weld Neck Flanges?

: Common stainless steel grades include:

SS 304 / 304L – General-purpose corrosion resistance
SS 316 / 316L – Enhanced resistance to chloride environments
SS 321 – Good high-temperature resistance
SS 904L – Excellent corrosion resistance in acidic conditions

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Stainless Steel Weld Neck Flanges Manufacturer