Threaded Flange (TF)
Yunming Metal offers stainless steel threaded flanges (TF type) in DN15–DN3000 sizes. Designed for non-welded pipe connections with BSP or NPT threads. Suitable for low-pressure pipelines in gas, steam, and chemical applications. ANSI, EN, and JIS compliant. Class 150–2500.
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Product Overview
Threaded flanges (TF flanges), also known as screwed flanges, are designed to connect pipes without the need for welding. The flange is screwed onto the male-threaded pipe, making it ideal for low-pressure systems or areas where welding is impractical. Stainless steel threaded flanges provide excellent corrosion resistance and ease of installation. Available in sizes from DN15 to DN3000, they comply with ANSI, EN, and JIS standards and are widely used in industrial pipelines handling water, gas, steam, or chemicals.
Application Areas
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Low-pressure oil and gas pipelines
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Fire protection systems
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Cooling water and drainage systems
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Water treatment and chemical pipelines
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Steam systems and air distribution lines
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Plumbing and industrial pipe networks
Product Features
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No welding required – suitable for flammable or explosive environments
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Internal threads for easy and fast pipe connection
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Available in BSP, NPT, or custom threading types
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Ideal for small-diameter, low to moderate pressure applications
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CNC-machined threads and bolt holes ensure precise fit and sealing
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Manufactured in 304, 316L, 321, 310S, 904L, and duplex grades
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Raised face or flat face available per standard
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Compatible with ANSI B16.5, EN 1092-1, JIS B2220, and ISO standards
Technical Specifications
| Parameter | Range |
|---|---|
| Nominal Size (DN) | DN15 – DN3000 |
| Outside Diameter (OD) | 34 mm – 3200 mm (approx. 1⁵⁄₁₆″ – 126″) |
| Thickness (T) | 9 mm – 120 mm (approx. ³⁄₈″ – 4¾″) |
| Thread Type | BSP, NPT, metric, or custom threading |
| Pressure Ratings | Class 150 – Class 2500 / PN6 – PN100 |
| Material Grades | ASTM A182 F304 / F316 / F316L / F321 / 310S / 904L / 2205 etc. |
| Standards | ANSI B16.5, EN 1092-1, JIS B2220, DIN, BS, ISO etc. |
| Type | Threaded Flange (TF), with raised face (RF) or flat face (FF) |
| Connection Type | Female-threaded bore for screwed connection |
| Surface Finish | CNC machined, anti-rust oil coating |
| Application | Non-welded pipe connections in gas, water, chemical, and steam systems |
Manufacturing Process
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Material Cutting – Stainless steel billets or plates are cut to size
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Forging & Forming – Blanks are forged or machined to required dimensions
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Thread Machining – Internal threads are CNC machined to tight tolerance
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Bolt Hole & Face Finishing – All surfaces are machined for precise sealing
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Inspection & Marking – Thread depth, alignment, and surface finish are inspected
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Protection & Packaging – Treated with anti-rust oil and packed for export
FAQ
Q1: What sizes do your threaded flanges cover?
A: We produce threaded flanges from DN15 to DN3000 (approx. ½″ – 120″), with customized threading available.
Q2: Are these suitable for high-pressure pipelines?
A: Threaded flanges are best for low to moderate pressure systems, especially where welding is restricted.
Q3: What thread standards do you support?
A: We offer BSP, NPT, ISO, and custom thread types to match regional or project specifications.
Q4: Do threaded flanges meet international standards?
A: Yes. Our flanges comply with ANSI B16.5, EN 1092-1, JIS B2220, and other applicable norms.
Q5: Are MTCs and 3rd party inspections available?
A: Yes. All shipments can include EN 10204 3.1/3.2 MTCs and third-party inspection as required.
Still have questions?
Feel free to contact us for more details or to discuss your custom stainless steel threaded flange requirements. Our technical support team is ready to assist with specifications, certifications, and delivery.
