Product Description
Product Overview
Our Carbon Steel Weld Neck Flange is precisely manufactured to comply with ANSI, EN1092-1, and ASTM A105N standards, ensuring compatibility with global piping systems. Featuring a raised face (RF) sealing design, this flange provides secure, leak-proof, and reliable connections for critical pipeline applications.
Constructed from high-quality ASTM A105N forged carbon steel, the flange offers excellent mechanical strength, toughness, and durability under both high pressure and elevated temperature conditions. The weld neck structure allows for smooth stress distribution between the flange and pipe, significantly reducing the risk of fatigue and enhancing joint reliability in demanding environments.
This flange is widely trusted in projects requiring long-term performance, structural safety, and cost efficiency, making it a preferred choice for:
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Oil & Gas pipelines (exploration, refining, and distribution)
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Petrochemical and chemical plants
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Power generation and thermal energy systems
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Water supply, desalination, and wastewater treatment facilities
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Industrial process piping and mechanical systems
Our carbon steel weld neck flange is engineered to meet the toughest industry requirements, offering not only superior mechanical performance but also ease of welding and installation, ensuring seamless integration with carbon steel pipelines.
Key Features:
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Material: Forged Carbon Steel (ASTM A105N)
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Standards: ANSI, EN1092-1, ASTM A105N (other standards available on request)
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Type: Weld Neck Flange with Raised Face (RF)
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Forged construction for exceptional durability and pressure resistance
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High mechanical strength to withstand heavy loads and demanding conditions
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Good corrosion resistance with appropriate coatings (e.g., anti-rust oil, galvanization)
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Leak-proof sealing for secure and reliable pipeline connections
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Ideal for high-pressure, high-temperature, and critical service environments
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Widely applied in oil & gas, petrochemical, power, water treatment, and industrial sectors
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.
