Product Description
Product Overview
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Our High Quality Weld Neck Flange is precision forged from ASTM A105N carbon steel and manufactured in full compliance with ASME B16.5 standards, ensuring reliability, strength, and durability in critical piping connections. The weld neck design provides a gradual transition between the flange and pipe wall thickness, which minimizes stress concentration, enhances fatigue resistance, and ensures long-term leak-proof performance even under severe working conditions.
This forged flange undergoes strict quality control and rigorous dimensional inspections, guaranteeing excellent mechanical strength, toughness, and pressure-bearing capacity. Its robust structure makes it highly suitable for high-pressure, high-temperature, and corrosive environments, providing dependable performance in the most demanding industrial applications.
With excellent resistance to mechanical stress, pressure fluctuations, and corrosion (when properly coated or treated), our weld neck flange ensures extended service life and operational safety. It is available in a wide range of sizes, pressure ratings (Class 150 to Class 2500), and surface finishes, making it a versatile solution for various pipeline projects.
Applications:
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Oil & Gas industry: upstream, midstream, and downstream pipeline systems
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Petrochemical & chemical plants: processing lines, refineries, and storage facilities
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Power generation: thermal, nuclear, and renewable energy systems
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Water treatment: desalination, wastewater management, and municipal supply
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Industrial pipelines: manufacturing, mechanical systems, and heavy-duty engineering projects
Key Features:
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Material: ASTM A105N Forged Carbon Steel
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Standard: ASME B16.5 (other international standards available upon request: EN1092-1, DIN, JIS)
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Type: Weld Neck Flange (WN)
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Forged construction for superior strength and durability
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High mechanical performance under high pressure and temperature conditions
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Leak-proof connection that ensures pipeline safety and reliability
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Enhanced fatigue resistance due to smooth transition from flange to pipe
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Versatile options: multiple sizes, pressure ratings, and coatings available
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Wide industrial applications across oil & gas, petrochemical, power, water treatment, and general industry
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Product Specifications
| Flange Type | Material | Standard / Grade | Size Range (Nominal Diameter) | Pressure Class |
|---|---|---|---|---|
| Weld Neck RF Flange | Carbon Steel, Alloy Steel, Stainless Steel | ASME B16.5 / ASTM A105, A350 LF2, A182 F304/F316, etc. | DN15 – DN3000 (½″ – 120″) | Class 150–2500 |
| Weld Neck RTJ Flange | Carbon Steel, Alloy Steel, Stainless Steel | ASME B16.5 / ASTM A182 F11/F22/F321, etc. | DN50 – DN3000 (2″ – 120″) | Class 300–2500 |
| Large Diameter WN Flange | Carbon Steel, Alloy Steel | ASME B16.47 Series A & B / ASTM A105, A350 LF2, etc. | DN400 – DN3000 (16″ – 120″) | Class 75–900 |
Sealing Face Options:
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RF (Raised Face)
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RTJ (Ring Type Joint)
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FF (Flat Face)
Company Introduction — Hebei Cangtie Industrial Co., Ltd
Hebei Cangtie Industrial Co., Ltd is a leading manufacturer and exporter of industrial flanges and pipe fittings, including weld neck flanges, slip-on flanges, socket weld flanges, blind flanges, elbows, reducers, and customized forged components.
Our production facility in Yanshan Economic Development Zone, Cangzhou City, Hebei Province, China is equipped with CNC machining centers, forging presses, welding lines, and advanced inspection equipment to ensure dimensional accuracy and product quality.
With over 10 years of manufacturing and export experience, our products meet ASME, ANSI, DIN, JIS, EN, and GB standards, serving clients in oil & gas, chemical processing, power generation, shipbuilding, and construction industries worldwide.
Contact Us
Contact Person: Hudson Liu
Mobile / WhatsApp: +86 157 3370 8805
Email: hudson@cangtiepipe.com
Website: https://ctflange.com/
Factory Address: Yanshan Economic Development Zone, Yanshan County, Cangzhou City, Hebei Province, China
Frequently Asked Questions (FAQ)
1. Are you a manufacturer or trading company?
We are a manufacturer with our own factory in Hebei, China, specializing in steel flanges and pipe fittings.
2. What materials do you offer?
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Carbon Steel: ASTM A105, ASTM A350 LF2, Q235, Q345, etc.
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Stainless Steel: 304, 304L, 316, 316L, 321, etc.
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Alloy Steel: ASTM A182 F11, F22, F5, F9, etc.
3. Which standards do your products comply with?
ASME B16.5, ASME B16.47, ANSI, ASTM, DIN, JIS, EN, GB — with third-party inspection available.
4. Do you support OEM/ODM services?
Yes, we can produce according to drawings, with custom machining, coating, marking, and packaging.
5. What is your MOQ?
MOQ is typically 1 piece for standard items; customized parts may vary.
6. Do you provide samples?
Yes, free samples for standard sizes; buyers cover freight cost.
7. What is your delivery time?
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In-stock: 3–5 working days
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Bulk/custom orders: 10–30 working days
8. How do you ensure quality?
We perform raw material inspection, in-process dimensional checks, non-destructive testing (NDT), and final pressure/leak tests. Third-party testing is available upon request.
