Threaded Flanges Manufacturer
At Steel Icon Stainless Pvt. Ltd., we are a trusted manufacturer and supplier of high-quality threaded flanges, ideal for low to medium pressure applications where welding is not feasible. Designed with internal threads, our flanges provide a secure and leak-proof connection for small-diameter pipes without the need for welding.
We manufacture threaded flanges in stainless steel grades like SS 304, SS 316, SS 321, SS 410, and Duplex 2205, compliant with ASTM, ASME, DIN, and EN standards.
What is a Threaded Flange?
Threaded flanges (also called screwed flanges) are designed with female threads that screw onto male-threaded pipes. Ideal for applications where welding isn’t possible, they’re commonly used in flammable environments, galvanized pipe systems, and maintenance-heavy installations.
| Products |
|---|
|
Stainless Steel Bar |
|
Fasteners |
|
Forged Products |
|
Flanges |
|
Forged Fittings |
|
Stainless Steel Billets |
|
Round Corner Square Billets |
|
Stainless Steel Pipes |
|
Pipe Fittings |
|
Valve |
Threaded Flanges Specifications
| Property | Specification |
|---|---|
|
Material Grades |
SS 304, SS 316, SS 321, SS 410, Duplex 2205
|
|
Size Range |
½” to 4” (Larger sizes available on request) |
|
Pressure Ratings |
Class 150, 300, 600, 900, 1500, 2500 |
|
Face Types |
Raised Face (RF), Flat Face (FF), RTJ (on request) |
|
Standards |
ASTM A182, ASME B16.5, EN 1092-1, DIN 2566 |
|
Thread Types |
NPT / BSPT / Custom on request |
|
Finish |
Machined, Pickled, Passivated, Zinc Coated |
Equivalent Grades
| Grade | UNS | EN / WNR |
|---|---|---|
|
SS 304 |
S30400 |
1.4301 / X5CrNi18-10 |
|
SS 316 |
S31600 |
1.4401 / X5CrNiMo17-12-2 |
|
SS 321 |
S32100 |
1.4541 / X6CrNiTi18-10 |
|
SS 410 |
S41000 |
1.4006 / X12Cr13 |
|
Duplex 2205
|
S31803 / S32205 |
1.4462 / X2CrNiMoN22-5-3
|
Chemical Composition
| Element | SS 304 | SS 316 |
|---|---|---|
|
Cr |
18–20% |
16–18% |
|
Ni |
8–10.5% |
10–14% |
|
Mo |
– |
2–3% |
|
C (max) |
0.08% |
0.08% |
Mechanical Properties
| Property | SS 304 / SS 316 |
|---|---|
|
Tensile Strength |
515 – 750 MPa |
|
Yield Strength |
205 – 310 MPa |
|
Elongation (%) |
≥ 30%
|
|
Hardness (HRB) |
≤ 95 |
Applications of Threaded Flanges
- Oil & Gas – Utility lines, instrumentation
- Water Supply – Galvanized piping systems
- Chemical Plants – Small-diameter, corrosive fluid lines
- Machinery & Equipment – Easy assembly pipe joints
- Marine Systems – No-weld utility pipe connections
Benefits of Threaded Flanges
- No welding needed – safe for flammable environments
- Easy to install, remove, and reuse
- Ideal for galvanized or coated pipes
- Cost-effective for small pipe systems
- Compatible with standard threaded fittings
Frequently Asked Questions
Explore our FAQs for insights on materials, customization, and delivery.
When should I use a threaded flange?
Use them when welding isn’t practical or safe, especially in flammable or maintenance-heavy systems.
Do I need a gasket with threaded flanges?
Yes, a gasket is required between flange faces to ensure leak-tight sealing.
Can you supply flanges with custom thread types?
Absolutely – NPT, BSPT, BSPP, and special threads are available on request.
What sizes are available?
Standard sizes range from ½” to 4”, but larger sizes can be custom-made.
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