Product Description
Product Overview
Our American Standard Weld Neck Flange is engineered from premium-grade stainless steel (commonly 304/316), strictly conforming to ASME B16.5 standards. With forged construction and precision machining, this flange ensures superior structural integrity, dimensional accuracy, and excellent resistance to corrosion in demanding environments.
The weld neck design provides a smooth transition between flange thickness and pipe wall thickness, minimizing stress concentration and enhancing fatigue resistance under cyclic loading. This makes it especially suitable for high-pressure, high-temperature, and critical service conditions where safety and long-term reliability are essential.
Designed for easy welding and seamless integration with stainless steel piping, our weld neck flange delivers leak-proof connections that support the efficient flow of liquids, gases, and corrosive media in diverse applications such as:
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Oil & Gas pipelines (upstream, midstream, and downstream projects)
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Petrochemical and chemical processing plants
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Power generation and thermal systems
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Water supply, desalination, and wastewater treatment facilities
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Marine engineering, shipbuilding, and offshore structures
By choosing our weld neck flange, you ensure a product that combines durability, mechanical strength, corrosion resistance, and precise compatibility with global piping standards. It is widely trusted by engineers, contractors, and project managers for long-term operational efficiency and safety.
Key Features:
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Material: Stainless Steel (304/316 grades, other alloys available on request)
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Standard: ASME B16.5 (also available in ANSI, DIN, EN, and JIS standards if required)
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Type: Weld Neck Flange
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Forged construction for enhanced strength and pressure resistance
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High corrosion resistance to withstand harsh and corrosive environments
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Leak-proof and durable connection for critical pipeline applications
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Excellent weldability for seamless integration with stainless steel pipes
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Versatile applications across oil & gas, chemical, 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.
