Product Description
Product Overview
Our Weld Neck Flange – Tapered Hub is manufactured in accordance with ASME B16.5 and ASME B16.47 standards, offering a high-strength and reliable connection for high-pressure and high-temperature piping systems.
The tapered hub design reduces stress concentration at the base of the flange, ensuring smooth flow and structural integrity. Weld neck flanges are butt-welded to the pipe, making them ideal for critical service conditions in industries such as oil & gas, petrochemical, power generation, shipbuilding, and water treatment.
Available in carbon steel, stainless steel, and alloy steel, our weld neck flanges are precisely machined, with various sealing face types including Raised Face (RF), Ring Type Joint (RTJ), and Flat Face (FF).
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.
