At Solitaire Fittings, we are one of the leading Stainless Steel 321 Buttweld Fittings manufacturers, suppliers, and exporters in India and across the globe. Known for their excellent durability, high-temperature resistance, and superior corrosion protection, our ASTM A403 WP 321 Stainless Steel Buttweld Fittings are widely used in industries such as oil & gas, chemical processing, power generation, shipbuilding, and food processing.
Whether you are looking for SS 321 Elbow, ANSI B16.9 SS 321 Pipe Cap, DIN 1.4878 Stub End, UNS S32109 Seamless Fittings, or ASME SA403 SS 321 Pipe Bend Exporter solutions, Solitaire Fittings offers a complete range of 321 Stainless Steel Pipe Fittings designed to meet both national and international standards.
What are Stainless Steel 321 Buttweld Fittings?
Stainless Steel 321 Buttweld Fittings are piping components made from 321 stainless steel, a titanium-stabilized grade of austenitic stainless steel. The addition of titanium improves resistance to intergranular corrosion, making these fittings an ideal choice for high-temperature environments (up to 870°C).These fittings are welded to pipes to change the direction of flow, reduce pipe size, or close the end of piping systems. Their smooth interior finish ensures better flow, minimal pressure drop, and reduced chances of leakage compared to threaded fittings.
Key Features of ASTM A403 WP 321 Stainless Steel Buttweld Fittings
- Excellent resistance to oxidation and corrosion.
- Strong performance in high-temperature environments.
- Enhanced resistance against intergranular corrosion due to titanium stabilization.
- Superior weldability and formability.
- Available in seamless, welded, and fabricated forms.
- Long service life with minimal maintenance needs.
Types of Stainless Steel 321 Buttweld Fittings We Offer
As a trusted Stainless Steel 321 Pipe Fittings Manufacturer in India, Solitaire Fittings supplies a wide range of buttweld fittings:
➤ SS 321 Elbow
- Used to change the direction of flow in pipelines (commonly 45° and 90°).
➤ ANSI B16.9 SS 321 Pipe Cap
- Closes the end of a pipe system securely, preventing leakage and protecting the pipeline.
➤ ASME SA403 SS 321 Pipe Bend Exporter
- Ideal for pipelines that need gradual directional changes without much pressure drop.
➤ DIN 1.4878 Stub End
- Used with lap joint flanges, especially where frequent dismantling is required.
➤ UNS S32109 Seamless Fittings
- Provide superior strength and smooth flow for critical applications where welded joints are not preferred.
➤ 321 Stainless Steel Pipe Reducer (Concentric & Eccentric)
- Helps in connecting pipes of different sizes while maintaining smooth fluid flow.
➤ 321 Stainless Steel Tee (Equal & Reducing)
- Divides or combines fluid flow efficiently in pipelines.
➤ 321 Stainless Steel Cross
- Connects four pipes together at a single joint.
At Solitaire Fittings, we provide stainless steel 321 industrial pipe fittings in a variety of shapes, dimensions, and pressure ratings to suit your project requirements.
Applications of Stainless Steel 321 Buttweld Fittings
Our ASTM A403 WP 321 Stainless Steel Buttweld Fittings are widely used in industries that require high-temperature performance and corrosion resistance.
- Oil & Gas Pipelines
- Chemical Processing Plants
- Food & Beverage Industry
- Power Generation & Heat Exchangers
- Pharmaceuticals & Biotech Plants
- Shipbuilding & Marine Engineering
- Water Treatment & Desalination Plants
Advantages of Using 321 Stainless Steel Pipe Fittings
Specifications- Heat Resistance: Performs exceptionally well in continuous service up to 870°C.
- Corrosion Protection: Titanium addition prevents carbide precipitation.
- Durability: Withstands harsh working conditions and high pressure.
- Cost-Effective: Long service life reduces replacement and maintenance costs.
- Global Standards: Manufactured as per ASTM, ASME, ANSI, and DIN specifications.
Schedule and Size Chart for Stainless 321 Pipe Fittings
| Nominal Pipe Size (NPS) | Outside Diameter (OD) (mm) | Wall Thickness (mm) – SCH 10S | Wall Thickness (mm) – SCH 40S | Wall Thickness (mm) – SCH 80S |
|---|---|---|---|---|
| ½” (15 NB) | 21.3 | 2.11 | 2.77 | 3.73 |
| 1” (25 NB) | 33.4 | 2.77 | 3.38 | 4.55 |
| 2” (50 NB) | 60.3 | 2.77 | 3.91 | 5.54 |
| 3” (80 NB) | 88.9 | 3.05 | 5.49 | 7.62 |
| 4” (100 NB) | 114.3 | 3.05 | 6.02 | 8.56 |
| 6” (150 NB) | 168.3 | 3.40 | 7.11 | 10.97 |
| 8” (200 NB) | 219.1 | 3.76 | 8.18 | 12.70 |
| 10” (250 NB) | 273.0 | 4.19 | 9.27 | 12.70 |
| 12” (300 NB) | 323.8 | 4.57 | 9.53 | 12.70 |
| 16” (400 NB) | 406.4 | 4.78 | 9.53 | 12.70 |
| 20” (500 NB) | 508.0 | 5.54 | 9.53 | 12.70 |
| 24” (600 NB) | 609.6 | 6.35 | 9.53 | 12.70 |
Mechanical Properties of Stainless Steel 321 Buttweld Fittings
| Property | Value |
|---|---|
| Tensile Strength (Mpa) | 515 MPa (min) |
| Yield Strength 0.2% Proof (MPa) | 205 MPa (min) |
| Elongation (%) | 40% (min) |
| Hardness (Brinell) | 217 HB max |
| Impact Strength | Good at room and elevated temperatures |
Chemical Composition – Stainless Steel 321 (UNS S32100 / S32109)
| Element | Content (%) |
|---|---|
| Carbon (C) | ≤ 0.08 |
| Manganese (Mn) | ≤ 2.00 |
| Phosphorus (P) | ≤ 0.045 |
| Sulfur (S) | ≤ 0.030 |
| Silicon (Si) | ≤ 0.75 |
| Chromium (Cr) | 17.0 – 19.0 |
| Nickel (Ni) | 9.0 – 12.0 |
| Titanium (Ti) | ≥ 5 × C% (0.20 – 0.70) |
| Iron (Fe) | Balance |
Physical Properties – Stainless Steel 321
| Property | Value |
|---|---|
| Density | 7.9 g/cm³ |
| Melting Point | 1398 – 1446 °C |
| Specific Heat Capacity | 500 J/kg·K (at 0–100 °C) |
| Thermal Conductivity | 16.3 W/m·K (at 100 °C) |
| Electrical Resistivity | 0.072 × 10⁻⁶ Ω·m |
| Modulus of Elasticity | 193 GPa |
| Magnetic Permeability | Non-magnetic (may become slightly magnetic after cold working) |
Specifications of Stainless Steel 321 Buttweld Fittings
| Standard | ASTM A403 / ASME SA403 |
|---|---|
| Grade | 321, 321H |
| UNS | S32100, S32109 |
| Type | Seamless / Welded / Fabricated |
| Size Range | ½” to 48” |
| DIN | 1.4878 |
| Bend Radius | 1D, 1.5D, 2D, 3D, 5D, Custom |
| Standards | ANSI B16.9, MSS-SP-43, ASME B16.28 |
Why Choose Solitaire Fittings for 321 Stainless Steel Pipe Fittings?
As a trusted name in the piping industry, Solitaire Fittings brings decades of experience and customer satisfaction. Here’s what makes us stand out:
- ISO-certified manufacturer with decades of expertise.
- Strict quality testing before dispatch.
- Global export network across Europe, Middle East, Asia, and USA.
- Competitive prices without compromising on quality.
- Custom manufacturing based on client specifications.
SS 321 Pipe Elbow Price in India
If you are looking for a reliable Stainless Steel 321 Pipe Fittings Manufacturer in India, Solitaire Fittings is your one-stop solution. Our ASTM A403 WP 321 Stainless Steel Buttweld Fittings offer superior performance, durability, and cost-efficiency for various industrial applications.
Request Your Stainless Steel 321 Buttweld Fittings Quote Today!
