Weld Neck Flange
Size: 6 weld neck flange, 4 inch stainless steel flange, 4 stainless steel flange, fixed flange, It is usually used in constructions, petroleum, chemical industry, power, ship building, paper making, metallurgy, water supply and sewage work, light and heavy industry, plumbing and electric etc.
Standard: API5L, ASTM A106 Gr.B, ASTM A53 Gr.B, ANSI A210-1996, ANSI B36.10M-2004, ASTM A1020-2002, ASTM A179-1990, BS 3059-2, DIN 17175, DIN 1630, DIN 2448
Weld Neck Flange (WNF)
The ultimate solution for high-pressure pipeline systems. Our forged Weld Neck Flanges feature a tapered hub designed for butt-welding to pipes, ensuring superior stress distribution and zero-leak performance in critical environments.
Product Parameters
|
Name |
Weld Neck Flange |
|
Size |
6 weld neck flange, 4 inch stainless steel flange, 4 stainless steel flange, fixed flange, It is usually used in constructions, petroleum, chemical industry, power, ship building, paper making, metallurgy, water supply and sewage work, light and heavy industry, plumbing and electric etc. |
|
Standard |
API5L, ASTM A106 Gr.B, ASTM A53 Gr.B, ANSI A210-1996, ANSI B36.10M-2004, ASTM A1020-2002, ASTM A179-1990, BS 3059-2, DIN 17175, DIN 1630, DIN 2448 |
|
Material |
GR.B, ST52, ST35, ST42, ST45, X42, X46, X52, X56, X60, X65, X70, SS304, SS316 etc. |
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Certificates |
API5L, ISO 9001:2008, SGS, BV, CCIC |
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Wall thickness |
SCH10, SCH20, SCH30, STD, SCH40, SCH60, SCH80, SCH100 SCH120, SCH160, XS, XXS |
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Marking |
Standard marking, or according to your request. Marking Method: Spray white paint |
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Test |
Chemical Component Analysis, Mechanical Properties, Technical Properties, Exterior Size Inspection, hydraulic testing , X-ray Test. |
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Delivery Time |
7-15 days |
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Advantages |
1. Reasonable price with excellent quality. 2. Abundant stock and prompt delivery. 3. Rich supply and export experience, sincere service. 4. Reliable forwarder, 2-hour away from port. |
Why Choose Our Weld Neck Flanges?
High Structural Strength
The tapered hub reinforces the flange base. By transitioning stress to the pipe via butt welding, it eliminates weak connection points found in slip-on types.
Fatigue Resistance
The smooth stress transition from the hub to the pipe minimizes turbulence. Proven to withstand cyclic loads and vibration without cracking.
Improved Flow Efficiency
Inner diameter (ID) matches the pipe exactly. This creates a seamless bore with no turbulence or erosion, extending system life by 30%.
Critical Applications
- 🏭 Oil & Gas: High-pressure upstream & midstream pipelines.
- 🔥 Petrochemical: Extreme temperature heat exchangers.
- 🌊 Offshore: Corrosion-resistant subsea connections.
- ⚡ Power Gen: High-pressure steam boiler systems.
Recommended for critical systems where failure is not acceptable.
Extreme Conditions
Pressure Class: Up to Class 2500 / 42.0 MPa
Temperature: -196°C to +600°C
Size Range: 1/2" to 60" (DN15 - DN1500)
Standardized Manufacturing Process
Forging
Refines grain structure for maximum density.
Heat Treatment
Normalizing/Tempering to improve mechanicals.
CNC Machining
Precision control for sealing face & bolt holes.
QC Testing
PMI, UT, and dimensional 100% inspection.
Quality Assurance & Factory Strength
- Full Traceability: Every flange is stamped with Heat No. and Mill Test Certificate (EN 10204 3.1) provided.
- Advanced Testing: In-house PMI (Material Chemistry), Ultrasonic (UT), and Radiographic (RT) testing available.
- Third-Party Support: Welcoming inspections from SGS, BV, TUV, and Intertek.
Purchasing FAQ
Q: What is your MOQ?
We support wholesale orders with a low threshold (e.g., 1 ton) and accept mixed sizes in a single container.
Q: What is the lead time for 20ft container?
Standard sizes are usually in stock. Custom orders take 20-30 days depending on the quantity.
Q: Can you customize flanges based on drawings?
Yes, we have a specialized CNC team to produce non-standard flanges according to your technical drawings.
Q: How can I get a quote quickly?
Please provide: Size, Pressure Class, Material, and Quantity. We will respond within 12 hours.
Request a Fast Quote Today
Expert technical support & competitive wholesale pricing for global distributors.
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