Threaded Flanges
Threaded Flanges – High-Pressure, Welding-Free Pipe Connection Solution
Threaded flanges (also called screwed flanges) are specialized pipe flanges that attach without welding. Their threaded bore matches external pipe threads, with tapered designs ensuring a tight seal. Often used with seal welds for extra protection, they’re ideal for hazardous or high-pressure environments.
Material Options for Threaded Flanges
| Material Category | Specific Grades/Standards |
|---|---|
| Stainless Steel | ASTM A182/A240: 304, 304L, 316, 316L, 310S, 321, 347H, Duplex (UNS S31803), Super Duplex (UNS S32750) |
| Carbon Steel | ASTM A105, ASTM A181 |
| Alloy Steel | ASTM A182: F1, F5, F9, F11, F22, F91 |
| Nickel Alloys | Monel 400/500, Inconel 600/625, Incoloy 800/825, Hastelloy C22/C276 |
| Copper Alloys | Copper, Brass, Gunmetal |
| Other Materials | Cast Iron, Aluminium, PVC, Thermoplastics |
Key Specifications
| Parameter | Details |
|---|---|
| Size Range | 1/8″ NB to 48″ NB |
| Pressure Ratings | 150#, 300#, 400#, 600#, 900#, 1500#, 2500# |
| Thread Type | Tapered (NPT/BSP) |
| Standards | ANSI, DIN, JIS, ASME, AWWA |
Applications & Advantages
✔ Primary Uses
High-pressure pipelines (oil & gas, chemical plants)
Explosive/hazardous environments (refineries, mining)
Small-diameter piping systems
Applications where welding is unsafe or impractical
✔ Benefits Over Welded Flanges
| Feature | Threaded Flanges | Welded Flanges |
|---|---|---|
| Installation Speed | Fast (no welding) | Slower |
| Maintenance | Easy disassembly | Permanent |
| Cost Efficiency | Lower labour costs | Higher welding costs |
| Safety | Safe for flammable areas | Requires hot work permits |
Technical Data by Material
Stainless Steel Threaded Flanges (ASTM A182)
| Grade | Tensile Strength (MPa) | Temperature Range | Corrosion Resistance |
|---|---|---|---|
| 304/304L | 485-515 | -200°C to +800°C | Excellent (acidic/alkali) |
| 316/316L | 485-515 | -200°C to +800°C | Superior (chloride environments) |
| Duplex 2205 | 620-880 | -50°C to +300°C | Extreme (seawater, acids) |
Why Choose Our Threaded Flanges?
Global Certifications: ISO 9001, PED, API (mention if applicable)
Custom Solutions: Non-standard sizes/specs available
Quality Assurance: 100% leak-testing before shipment
Export Experience: Supplied to 20+ countries
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Contact: 📞 +91 9930129404 | ✉ sales@msflange.com