Solitaire Fittings is a trusted Stainless Steel 316 Pipe Fittings Manufacturer in India, supplying high-quality buttweld fittings worldwide. Our Stainless Steel 316 Buttweld Fittings are manufactured following international standards like ANSI B16.9, ANSI B16.28, ASTM A403, and DIN specifications to ensure durability, precision, and long service life. These fittings are widely used in industries such as oil & gas, petrochemical, chemical processing, pharmaceuticals, power plants, water treatment, and shipbuilding. Stainless Steel 316 is one of the most versatile and corrosion-resistant materials, making it an ideal choice for buttweld pipe fittings.
What are Stainless Steel 316 Buttweld Fittings?
Stainless Steel 316 Buttweld Fittings are piping components that connect, redirect, or terminate the flow of liquids, gases, or chemicals in pipelines. They are welded directly to pipes, which provides a leak-proof and strong joint compared to threaded fittings. Made from 316 stainless steel (UNS S31600 / DIN 1.4401), these fittings contain molybdenum, which significantly improves resistance against pitting, crevice corrosion, and chloride environments. This makes them superior to 304-grade fittings in marine and chemical environments.
Features and Advantages of Stainless Steel 316 Buttweld Fittings
- Excellent Corrosion Resistance – Suitable for marine, chemical, and chloride-rich environments.
- High Strength and Durability – Performs well under high pressure and temperature.
- Leak-Proof Joints – Welding provides a stronger and safer connection.
- Hygienic Material – Ideal for food, beverage, and pharmaceutical applications.
- Cost-Effective – Long service life reduces replacement costs.
- Standards Compliance – Manufactured as per ASTM A403, ANSI B16.9, ANSI B16.28, and DIN standards.
Types of Stainless Steel 316 Buttweld Fittings
At Solitaire Fittings, we manufacture and stock a wide range of SS 316 Pipe Fittings, including:
➤ Stainless Steel 316 Elbows
- ASTM A403 WP 316 Pipe Elbow is used to change the direction of flow in pipelines.
- Available in 316 90 Degree Elbow and 45° configurations.
- DIN 1.4401 LR Elbow (Long Radius) ensures smooth flow with minimal pressure drop.
➤ Stainless Steel 316 Reducers
- Used to connect pipes of different diameters.
- Stainless Steel 316 Buttweld Reducer and Stainless Steel UNS S31600 Reducer are commonly used in chemical and power industries.
- Available in both concentric and eccentric designs.
➤ Stainless Steel 316 Tees
- ANSI B16.9 BW ASTM A403 F316 Stainless Steel Equal Tee allows equal distribution of fluids through three pipelines.
- ANSI B16.28 Stainless Steel 316 Equal Tee is designed for high-pressure applications.
- DIN 1.4571 Reducing Tee Stockist – used where pipe branches are smaller than the main pipeline.
➤ Stainless Steel 316 End Caps
- 316 Pipe End Cap is used to seal the end of a pipeline.
- Provides protection and ensures leak-proof performance.
➤ Other Fittings
- Crosses, stub ends, and bends are also available on request.
Applications of Stainless Steel 316 Buttweld Fittings
Our SS 316 Pipe Fittings are widely used in:
- Oil & Gas Industry
- Petrochemical Plants
- Power Generation Units
- Food & Beverage Processing
- Pharmaceutical Equipment
- Marine and Offshore Engineering
- Water Treatment Systems
ASTM A403 310S Stainless Steel Buttweld Fittings – Standards and Specifications
Our fittings are manufactured in accordance with ASTM A403 310S Stainless Steel Buttweld Fittings standard, ensuring international quality compliance.
Specifications- Standard: ASTM A403 / ASME SA403
- Grade: 310S (UNS S31008 / UNS S31000)
- Dimensions: ASME/ANSI B16.9, B16.28, MSS-SP-43
- Size Range: ½” NB to 48” NB
- Thickness: Sch 10 to Sch XXS
- Types: Seamless, Welded, Fabricated
Schedule and Size Chart – Stainless Steel 316 Buttweld Fittings
| Nominal Pipe Size (NPS) | Outside Diameter (OD) (mm) | Wall Thickness (mm) SCH 10 | SCH 40 | SCH 80 | SCH 160 | SCH XXS |
|---|---|---|---|---|---|---|
| ½” | 21.3 | 2.11 | 2.77 | 3.73 | 4.78 | 7.47 |
| 1” | 33.4 | 2.77 | 3.38 | 4.55 | 6.35 | 9.09 |
| 2” | 60.3 | 2.77 | 3.91 | 5.54 | 8.74 | 11.07 |
| 4” | 114.3 | 3.05 | 6.02 | 8.56 | 13.49 | 17.12 |
| 6” | 168.3 | 3.40 | 7.11 | 10.97 | 18.26 | 21.95 |
| 8” | 219.1 | 3.76 | 8.18 | 12.70 | 23.01 | 28.58 |
| 12” | 323.8 | 4.57 | 11.13 | 17.48 | 32.54 | 36.71 |
Mechanical Properties of SS 316 Buttweld Fittings
| Property | Metric Value | Imperial Value |
|---|---|---|
| Tensile Strength (min) | 515 MPa | 75,000 psi |
| Yield Strength (0.2% Proof, min) | 205 MPa | 30,000 psi |
| Elongation (in 50mm) | 40% | 40% |
| Hardness (Brinell) | 217 HB max | 217 HB max |
| Impact Strength | High | High |
Chemical Composition – Stainless Steel 316 (UNS S31600 / DIN 1.4401)
| Element | Content (%) |
|---|---|
| Carbon (C) | ≤ 0.08 |
| Manganese (Mn) | ≤ 2.00 |
| Phosphorus (P) | ≤ 0.045 |
| Sulfur (S) | ≤ 0.03 |
| Silicon (Si) | ≤ 0.75 |
| Chromium (Cr) | 16.0 – 18.0 |
| Nickel (Ni) | 10.0 – 14.0 |
| Molybdenum (Mo) | 2.0 – 3.0 |
| Nitrogen (N) | ≤ 0.10 |
| Iron (Fe) | Balance |
Physical Properties – Stainless Steel UNS S31600 Reducer
| Property | Value |
|---|---|
| Density | 8.0 g/cm³ |
| Melting Point Range | 1375 – 1400 °C |
| Thermal Conductivity | 16.3 W/m·K (at 100 °C) |
| Specific Heat Capacity | 500 J/kg·K (at 0–100 °C) |
| Electrical Resistivity | 0.074 × 10⁻⁶ Ω·m (at 20 °C) |
| Modulus of Elasticity | 193 GPa |
| Magnetic Permeability | Non-magnetic in annealed condition |
Specifications Chart – Stainless Steel 316 Buttweld Fittings
| Standard / Specification | Details |
|---|---|
| Material Grade | Stainless Steel 316 |
| UNS | S31600 |
| DIN | 1.4401 |
| Standards | ASTM A403 / ASME SA403 |
| Fitting Dimensions | ANSI B16.9, ANSI B16.28, MSS SP-43 |
| End Connections | Beveled Ends, Plain Ends |
| Size Range | ½” NB to 48” NB |
| Schedules | SCH 10, SCH 20, SCH 40, SCH 60, SCH 80, SCH 160, SCH XXS |
| Form | Elbows, Reducers, Tees, Caps, Crosses, Stub Ends |
Why Choose Solitaire Fittings for Stainless Steel 316 Buttweld Fittings?
As a leading Stainless Steel 316 Pipe Fittings Manufacturer, Solitaire Fittings is known for delivering precision-engineered fittings that meet global quality standards.
- Large Inventory: We stock DIN 1.4401 LR Elbow, DIN 1.4571 Reducing Tee, ANSI B16.9 Equal Tee, and 316 Pipe End Cap in various sizes.
- Custom Solutions: Fittings can be tailored to client-specific requirements.
- Stringent Quality Control: Each fitting undergoes dimensional checks, hydro testing, and mechanical property verification.
- Global Supply: We export to Europe, Asia, the Middle East, Africa, and North America.
- Competitive Pricing: High-quality products at cost-effective rates.
Request Your Stainless Steel 316 Buttweld Fittings Quote Today!
