Long Weld Neck Flanges
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Long Weld Neck Flanges
Long Weld Neck Flange (LWN Flange)
A Long Weld Neck Flange (LWN Flange) is a specially designed flange with an extended tapered neck that provides additional reinforcement and smooth stress distribution in piping systems. It is commonly used for pressure vessels, storage tanks, columns, and high-pressure process equipment where superior strength and structural integrity are essential.
At Royal Steel India, we manufacture and supply premium-quality Long Weld Neck Flanges in a wide range of sizes, pressure classes, materials, and international standards. Our flanges are precision-engineered to deliver outstanding durability, excellent corrosion resistance, and reliable performance in demanding industrial applications.
A Long Weld Neck Flange is similar to a standard Weld Neck Flange but features a longer tapered hub. The extended neck acts as a reinforcement section, reducing stress concentration and improving load distribution between the flange and connected equipment. It is typically butt-welded to pressure vessels or pipelines, providing a strong, leak-proof, and permanent connection.
Long Weld Neck Flanges are widely used where high pressure, elevated temperatures, and critical operating conditions demand maximum reliability.
Key Features
- Extended tapered neck for added reinforcement
- Butt-weld connection for superior strength
- Excellent stress distribution
- Suitable for high-pressure and high-temperature applications
- Leak-proof and durable construction
- Smooth internal bore for improved flow efficiency
- Available in multiple sizes and pressure ratings
- Long service life with minimal maintenance
Available Grades
We manufacture Long Weld Neck Flanges in various materials, including:
- Alloy Steel Long Weld Neck Flanges
- Carbon Steel Long Weld Neck Flanges
- Stainless Steel Long Weld Neck Flanges
- Duplex Steel Long Weld Neck Flanges
- Super Duplex Steel Long Weld Neck Flanges
- Nickel Alloy Long Weld Neck Flanges
- Copper Nickel Long Weld Neck Flanges
- Titanium Long Weld Neck Flanges
- Galvanized Long Weld Neck Flanges
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
- Pressure Vessels
- Storage Tanks
- Heat Exchangers
- Oil & Gas Industry
- Petrochemical Plants
- Chemical Processing
- Power Generation
- Refineries
- Offshore Platforms
- Marine Industry
- Industrial Process Equipment
Why Choose Royal Steel India?
Royal Steel India is a trusted manufacturer, supplier, and exporter of premium-quality Long Weld Neck Flanges. Our products are manufactured using high-grade raw materials, advanced machining technology, and strict quality inspections to ensure exceptional strength, dimensional accuracy, and long-lasting performance. We are committed to delivering products that meet international standards with competitive pricing and on-time delivery.
Frequently Asked Questions
What is a Long Weld Neck Flange used for?
A Long Weld Neck Flange is used to connect pressure vessels, storage tanks, pipelines, and process equipment where additional reinforcement and high structural strength are required.
How is a Long Weld Neck Flange different from a Weld Neck Flange?
A Long Weld Neck Flange has a much longer tapered hub than a standard Weld Neck Flange. The extended neck provides better stress distribution and is commonly used for pressure vessels and specialized industrial equipment.
What are the advantages of a Long Weld Neck Flange?
Long Weld Neck Flanges offer superior mechanical strength, improved stress distribution, leak-proof performance, and excellent reliability in high-pressure and high-temperature applications.
What materials are available for Long Weld Neck Flanges?
Long 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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