Weld Neck Flange Manufacturer
- Our weld neck flanges have an extended neck and beveled end for butt welding, forming a robust, seamless joint that withstands high stress and flow.
- Available in a range of materials, sizes, and designs, they provide seamless pipe integration with pressure ratings up to 2500 PSI.
- Forged with ±0.01 mm Tolerance
- 40% Stronger than Standard Flanges
- Leak-free, Secure Weld Reducing System Stress
- Fully Customizable
- ANSI, ASME, and API Compliant
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What Materials Are Available for Our Weld Neck Flanges?
We offer weld neck flanges in various materials, providing strength, durability, and corrosion resistance for diverse applications.
Carbon Steel
- Cost-effective and commonly used for general-purpose applications.
- Resilient and robust under moderate stress conditions.
- Coating needed to avoid corrosion in harsh environments.
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Stainless Steel
- Outstanding corrosion resistance in harsh, high-pressure conditions.
- Built to be strong, durable, and dependable for extended use.
- More expensive than carbon steel.
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Alloy Steel
- Increased strength and wear resistance for heavy-duty applications.
- Resists corrosion and high temperatures in demanding conditions.
- Ideal for high-strength applications requiring specific material properties.
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Aluminum
- Lightweight and corrosion-resistant in non-corrosive environments.
- Delivers superior strength-to-weight ratio for aerospace and automotive uses.
- Lower strength than steel, limiting high-pressure usage.
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Titanium
- Exceptional corrosion resistance in acidic and saline conditions.
- High strength-to-weight ratio for extreme temperature conditions.
- Expensive and harder to process than other metals.
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Copper Nickel Alloy
- Outstanding corrosion resistance in marine and seawater conditions.
- Excellent thermal and electrical conductivity with robust strength.
- Low maintenance with long-lasting performance in harsh conditions.
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Based on Neck Length
Our weld neck flanges, available in standard, long, and reducing designs, offer reliable connections for high-pressure systems.
Standard Weld Neck Flange
- Features standard tapered neck for smooth stress transition.
- Suitable for high-temperature and high-pressure piping systems.
- Ensures structural stability by providing a robust butt-weld connection.
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Long Weld Neck (LWN) Flange
- Extended neck design acts as an integral pipe extension.
- Ideal for pressure vessels and column applications.
- Reduces stress concentration in critical high-load areas.
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Reducing Weld Neck Flange
- Designed with reduced bore for pipe size transition.
- Connects different pipe diameters without extra fittings.
- Maintains strength while optimizing flow alignment.
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Based on Face Type
For a variety of pressure systems, our RF, FF, and RTJ weld neck flanges provide safe, dependable seals.
Raised Face Weld Neck Flange
- Has an elevated sealing surface to enhance gasket compression.
- Typically found in medium to high-pressure applications.
- Compatible with numerous soft gasket materials.
- Delivers dependable sealing performance in industrial piping systems.
Flat Face Weld Neck Flange
- Flat sealing surface distributes bolt load evenly.
- Ideal for low-pressure systems and cast iron connections.
- Prevents flange cracking caused by uneven stress.
- Commonly used with full-face gaskets for better support.
Ring Type Joint Weld Neck Flange
- Engineered with a precision-machined groove for metal ring gaskets.
- Frequently used in medium to high-pressure applications.
- Works with a variety of soft gasket materials.
- Delivers dependable sealing performance in industrial piping systems.
Based on Functionality
Our wn flanges, available in slip-on, orifice, and blind types, provide reliable and versatile solutions for diverse piping systems.
Slip-On Weld Neck Flange
- Designed for easy pipe insertion before welding.
- Necessitates fillet welds on both the inside and outside.
- Suitable for low to moderate pressure systems.
- Offers cost-effective installation and alignment flexibility.
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Orifice Weld Neck Flange
- Integrates pressure tap holes for flow measurement.
- Used with orifice plates in metering systems.
- Ensures accurate differential pressure monitoring.
- Common in oil, gas, and process industries.
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Weld Neck Blind Flange
- Solid flange used to close pipe ends.
- Prevents flow while allowing future expansion.
- Provides high strength under pressure conditions.
- Ideal for testing, isolation, and maintenance operations.
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Weld Neck Flange Dimensions & Sizes
Weld neck flanges are designed per the ANSI/ASME B16.5 standard, covering pipe flanges up to 24 inches. The key dimensions for various pressure classes are as follows:
Pressure Class | Outside Diameter (OD) | Flange Thickness (T) | Bore (B) | Bolt Hole Diameter (D) | Number of Bolt Holes |
150 | 2″ – 24″ | 0.25″ – 1.00″ | 1.25″ – 21″ | 0.75″ – 1.50″ | 4 – 12 |
300 | 2″ – 24″ | 0.25″ – 1.13″ | 1.50″ – 22″ | 0.75″ – 1.50″ | 4 – 12 |
600 | 2″ – 24″ | 0.38″ – 1.50″ | 1.75″ – 24″ | 1.00″ – 1.75″ | 4 – 16 |
900 | 2″ – 24″ | 0.38″ – 1.75″ | 2.00″ – 25″ | 1.00″ – 1.75″ | 4 – 16 |
1500 | 2″ – 24″ | 0.50″ – 2.00″ | 2.25″ – 27″ | 1.25″ – 2.00″ | 4 – 20 |
2500 | 2″ – 24″ | 0.75″ – 2.50″ | 2.50″ – 28″ | 1.25″ – 2.00″ | 4 – 24 |
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Why Choose Our Weld Neck Flanges?
Manufactured with Precision
Our weld neck flanges are forged with ±0.01 mm precision for perfect fit and performance.
Seamless Integration
Designed for smooth pipe-to-flange transition, reducing stress points and improving system integrity.
Customization Options
Offered in different sizes, pressure ratings, and materials to fit your project requirements.
Global Certification
Certified to meet international standards such as ASME, ANSI, and API for quality assurance.
Applications
We provide reliable weld neck flanges for high-pressure, high-temperature systems in various industries, ensuring secure, leak-free connections.
Piping Systems
- Used for connecting high-pressure pipelines, ensuring a secure, leak-free seal for fluid transport in various industrial systems.
Refineries and Chemical Plants
- Essential in high-pressure chemical processing, connecting pipes and equipment in refining processes, providing durability and resistance to corrosion.
Oil and Gas Industry
- Essential for pipeline connections in offshore rigs and refineries, able to endure high-pressure, high-temperature conditions in oil and gas transportation.
Power Generation
- Used in power plants, connecting steam lines and boilers, withstanding high pressure and temperatures in energy production systems.
Water Treatment Plants
- Employed in water treatment systems to connect pipelines, ensuring secure, high-pressure connections for safe water distribution and processing.
HVAC Systems
- Designed to connect pipes in HVAC systems, providing a secure, leak-resistant seal for fluid flow.
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FAQs
What types of materials are used for weld neck flanges?
Weld neck flanges are available in carbon steel, stainless steel, alloy steel, titanium, and copper-nickel alloy, etc.
How are weld neck flanges manufactured?
They are typically forged to ensure high strength and resistance to high pressures, followed by precision machining to exact specifications.
What weld neck flange pressure ratings are available?
Depending on the needs of the application, weld neck flanges come in a variety of pressure ratings, such as 150, 300, 600, and higher.
What is the maximum temperature a weld neck flange can handle?
Weld neck flanges can handle temperatures up to 1000°F, depending on the material, with some alloys performing well in extreme heat conditions.
Is it simple to install weld neck flanges?
Yes, weld neck flanges provide a smooth integration with pipes, ensuring quick and secure installation in high-pressure systems.
Do specific maintenance requirements apply to weld neck flanges?
Frequent inspection is advised, particularly for the integrity of the weld. They are designed to survive a long period without frequent maintenance because of their robust construction.
Can weld neck flanges be used with any pipe?
Yes, they are designed to be welded to pipes of various materials, sizes, and pressures, providing a secure and lasting connection.
In which industries are weld neck flanges used?
The oil and gas, power generating, chemical, water treatment, and maritime industries frequently employ weld neck flanges.