022 66393751
Long Weld Neck Flanges – Manufacturer & Supplier in India
What is a Long Weld Neck Flange?
A Long Weld Neck Flange (LWN Flange) is an extended version of a weld neck flange, designed for high-pressure and high-temperature applications. It features a longer tapered hub, which provides extra reinforcement to the pipeline, reducing stress concentration. These flanges are commonly used in boilers, heat exchangers, pressure vessels, and industrial piping systems.
Key Features of Long Weld Neck Flanges
Extended Hub Design – Provides better strength and stress distribution.
Leak-Proof Connection – Ideal for high-pressure applications.
Available in Multiple Materials – Stainless Steel, Carbon Steel, and Alloy Steel.
Customizable Lengths – Suitable for industry-specific needs.
High-Temperature Resistance – Used in extreme environments.
Types of Long Weld Neck Flanges
Long weld neck flanges are available in various types based on industry requirements:
- Standard Long Weld Neck Flange
Used in general high-pressure and high-temperature applications.
- Heavy Barrel Long Weld Neck Flange
Designed for high-stress environments with extra reinforcement.
- Equal Barrel Long Weld Neck Flange
Has a uniform thickness throughout for consistent strength.
- Custom Length Long Weld Neck Flange
Available in custom lengths for specific industrial needs.
Stainless Steel Long Weld Neck Flanges Manufacturer in India
We are a leading Long Weld Neck Flange manufacturer in India, offering:
Flanges manufactured to ASTM, ASME, ANSI, DIN, and EN standards.
Size range from ½” to 48” (DN15 to DN1200).
Available in multiple pressure ratings from Class 150 to Class 2500.
Worldwide shipping with competitive pricing.
Specifications of Long Weld Neck Flanges
Specification | Details |
Material Grade | Stainless Steel, Carbon Steel, Alloy Steel |
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 | Welded |
Application | High-pressure and high-temperature piping systems |
Chemical Composition of Stainless Steel Long Weld Neck Flanges
Element | Composition (%) |
Carbon (C) | 0.03 max |
Manganese (Mn) | 2.00 max |
Phosphorus (P) | 0.045 max |
Sulfur (S) | 0.030 max |
Silicon (Si) | 1.00 max |
Chromium (Cr) | 16.0 – 18.0 |
Nickel (Ni) | 10.0 – 14.0 |
Molybdenum (Mo) | 2.00 – 3.00 |
Mechanical Properties of Stainless Steel Long Weld Neck Flanges
Property | Value |
Tensile Strength | 485 MPa (min) |
Yield Strength | 170 MPa (min) |
Elongation | 40% (min) |
Hardness (Brinell) | 217 max |
Hardness (Rockwell B) | 95 max |
Common Applications of Long Weld Neck Flanges
Oil & Gas Pipelines – Used in high-pressure pipelines.
Boilers & Heat Exchangers – Provides stability under extreme temperatures.
Petrochemical Plants – Suitable for aggressive chemical environments.
Power Generation – Used in turbines and pressure vessels.
Marine & Offshore Industries – Ensures durability in harsh conditions.
Countries & Indian States We Supply Long Weld Neck Flanges To Global Export Destinations
Region | Countries |
Middle East | UAE, Saudi Arabia, Qatar, Oman, Kuwait, Bahrain |
Asia | Japan, South Korea, Singapore, Malaysia, Thailand, Vietnam |
North America | USA, Canada, Mexico |
Europe | Germany, UK, France, Italy, Spain, Russia |
South America | Brazil, Argentina, Chile, Colombia, Peru |
Africa | South Africa, Egypt, Nigeria, Kenya, Algeria |
Australia & Oceania | Australia, New Zealand |
Major Indian Cities & States for Long Weld Neck Flanges Supply
State | Major Cities |
Maharashtra | Mumbai, Pune, Nagpur, Nashik, Aurangabad |
Gujarat | Ahmedabad, Surat, Vadodara, Rajkot, Bhavnagar |
Tamil Nadu | Chennai, Coimbatore, Madurai, Tiruchirappalli |
Karnataka | Bengaluru, Mangalore, Mysuru, Hubli-Dharwad |
Delhi NCR | New Delhi, Noida, Gurugram, Faridabad, Ghaziabad |
West Bengal | Kolkata, Howrah, Durgapur, Asansol, Siliguri |
Uttar Pradesh | Kanpur, Lucknow, Agra, Varanasi, Meerut |
Telangana | Hyderabad, Warangal, Karimnagar, Nizamabad |
Andhra Pradesh | Visakhapatnam, Vijayawada, Guntur, Tirupati |
Rajasthan | Jaipur, Jodhpur, Udaipur, Kota, Ajmer |
Buy High-Quality Long Weld Neck Flanges in India
Looking for premium Stainless Steel Long Weld Neck Flanges? Contact us today for competitive prices, bulk orders, and customized solutions!
1. What is the purpose of a Long Weld Neck Flange?
A Long Weld Neck Flange provides a strong, leak-proof connection in high-pressure and high-temperature applications, ensuring stability and reduced stress.
2. What are the benefits of using a Long Weld Neck Flange?
Enhances pipeline strength
Reduces stress concentration
Suitable for high-pressure applications
Offers better durability in extreme conditions
3. Which industries use Long Weld Neck Flanges?
Long weld neck flanges are widely used in oil & gas, petrochemical, power generation, marine, and offshore industries.
4. What materials are used for manufacturing Long Weld Neck Flanges?
These flanges are available in Stainless Steel, Carbon Steel, and Alloy Steel, depending on the application’s requirements.
5. How do I select the right Long Weld Neck Flange?
Consider pipe size, pressure rating, material grade, and application before choosing a long weld neck flange.