Weld Neck Flanges
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Weld Neck Flanges
Weld Neck Flange (WN Flange)
A Weld Neck Flange (WN Flange) is one of the most reliable and widely used flanges in industrial piping systems. It features a long tapered hub that is butt-welded directly to the pipe, providing exceptional strength and reducing stress at the connection point. This design makes Weld Neck Flanges the preferred choice for high-pressure, high-temperature, and critical service applications.
At Royal Steel India, we manufacture and supply premium-quality Weld Neck Flanges in a wide range of sizes, pressure classes, materials, and international standards. Every flange is produced with precision to ensure leak-proof performance, excellent durability, and long service life.
A Weld Neck Flange is designed with a tapered neck that gradually transfers stress from the flange to the pipe. Unlike other flange types, it is welded using a butt weld, creating a strong and permanent connection. This reduces turbulence inside the pipeline, improves flow efficiency, and minimizes the risk of leakage.
Because of its superior strength, the Weld Neck Flange is commonly used in demanding industries where safety and performance are critical.
Key Features
- Long tapered hub for maximum strength
- Butt-weld connection for a secure joint
- Excellent resistance to high pressure and temperature
- Reduces stress concentration at the weld
- Smooth internal bore for better flow efficiency
- Leak-proof and highly durable design
- Suitable for critical industrial applications
- Long service life with minimal maintenance
Available Grades
We manufacture Weld Neck Flanges in various materials, including:
Available Standards
- ASME B16.5
- ASME B16.47 Series A & B
- ANSI
- DIN
- EN
- BS
- JIS
- MSS SP-44
Pressure Ratings
- Class 150
- Class 300
- Class 600
- Class 900
- Class 1500
- Class 2500
- PN6 to PN400
Applications
- Oil & Gas Industry
- Petrochemical Plants
- Chemical Processing
- Refineries
- Power Generation
- Water Treatment Plants
- Offshore Platforms
- Marine Industry
- Pharmaceutical Industry
- Food Processing Plants
- Pulp & Paper Industry
Why Choose Royal Steel India?
Royal Steel India is committed to delivering high-quality Weld Neck Flanges that meet international quality standards. Our products are manufactured using premium raw materials, advanced production techniques, and strict quality inspections to ensure reliable performance in every application.
Whether you require standard or custom specifications, we provide durable flange solutions with competitive pricing, timely delivery, and dedicated customer support.
Frequently Asked Questions
What is a Weld Neck Flange used for?
A Weld Neck Flange is used to connect pipes, valves, and equipment in high-pressure and high-temperature piping systems while ensuring a strong and leak-proof connection.
Why is a Weld Neck Flange better than a Slip-On Flange?
A Weld Neck Flange offers higher strength, better stress distribution, and greater reliability, making it suitable for critical industrial applications.
Which industries use Weld Neck Flanges?
These flanges are commonly used in oil & gas, chemical processing, power plants, marine, petrochemical, water treatment, and pharmaceutical industries.
What materials are available?
Weld Neck Flanges are available in Stainless Steel, Carbon Steel, Alloy Steel, Duplex Steel, Nickel Alloys, Inconel, Monel, Hastelloy, Titanium, and other special alloys.
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