At Solitaire Fittings, we are a leading ASTM A403 WP 347H Stainless Steel Buttweld Fittings Manufacturer in India and a trusted global supplier of premium-quality pipe fittings. Our wide range of Stainless Steel 347H Buttweld Fittings is designed for industries that demand excellent mechanical strength, superior corrosion resistance, and durability even under high-temperature and high-pressure environments.
We specialize in manufacturing ASTM A403 SS 347H Butt weld Pipe Fittings that meet international standards such as ANSI B16.9, ASME SA 403, ASTM A403, and other specifications required by global clients. With years of expertise, Solitaire Fittings has earned recognition as one of the most reliable 347H SS Industrial Pipe Fittings Distributors in India and abroad.
What Are Stainless Steel 347H Buttweld Fittings?
Stainless Steel 347h Buttweld Fittings are pipe fittings made from grade 347H stainless steel, an austenitic chromium-nickel steel stabilized with columbium (niobium). The “H” in 347H denotes high carbon content, which enhances creep resistance and makes it ideal for applications at elevated temperatures above 1000°F (538°C).
These fittings are connected to pipes by the buttweld method, meaning the ends are welded directly to the piping system. This ensures leak-proof joints, excellent flow characteristics, and long-lasting performance.
They are commonly used in oil & gas refineries, petrochemical plants, power generation, heat exchangers, chemical processing industries, and high-pressure piping systems.
Key Features of 347H Buttweld Fittings
- High resistance to oxidation and intergranular corrosion
- Excellent strength and durability in high-temperature service
- Superior creep strength due to higher carbon content
- Cost-effective and long-lasting compared to standard stainless steel fittings
- Leak-proof welded joints with smooth internal surfaces for better flow
- Compliance with international standards like ASTM A403, ASME SA 403, ANSI B16.9
Types of Stainless Steel 347H Buttweld Fittings
At Solitaire Fittings, we manufacture and supply a complete range of Stainless Steel 347/347H Buttweld Fittings in different shapes, sizes, and pressure ratings:
➤ SS 347H Elbow
- Available in 90° and 45° angles.
- Used to change the flow direction of pipelines.
➤ ANSI B16.9 SS 347H Pipe Cap
- Protects pipe ends from damage and contamination.
- Commonly used in pipeline closures.
➤ Reducers (Concentric & Eccentric)
- Connects pipes of different diameters.
- Ensures smooth flow without pressure loss.
➤ Tees (Equal & Unequal)
- Distributes flow evenly in three directions.
- Available in multiple sizes to suit piping layouts.
➤ ASME SA 403 SS 347H Pipe Bend
- Allows smooth directional changes in pipelines.
- Available in long radius and short radius designs.
➤ Stub Ends & Lap Joints
- Used with flanges for quick installation and disassembly.
➤ Cross Fittings
- Distributes flow in four directions.
- Widely used in high-pressure systems.
Applications of Stainless Steel 347H Buttweld Fittings
These fittings are widely used in industries that demand strength, heat resistance, and corrosion protection. Some major applications include:
- Oil & Gas Refineries – for high-pressure pipelines and heat exchangers
- Petrochemical & Chemical Processing Plants – for corrosive fluid transport
- Power Generation – for boiler piping, superheaters, and reheaters
- Marine & Shipbuilding Industry – due to resistance to seawater corrosion
- Pharmaceutical & Food Industry – hygienic pipelines requiring durability
- Aerospace & Defense Applications – for high-strength, temperature-resistant pipelines
Specifications Chart for ASTM A403 WP 347H Stainless Steel Buttweld Fittings
| Standard / Specification | Description |
|---|---|
| ASTM A403 WP347H | Standard specification for wrought austenitic stainless steel fittings |
| ASME SA 403 | Boiler and pressure vessel code fittings |
| ANSI B16.9 | Factory-made wrought buttweld fittings |
| MSS-SP-43 | Stainless steel buttweld fittings for low-pressure applications |
| UNS S34709 | Material designation for stainless steel 347H |
Mechanical Properties of SS 347H Buttweld Fittings
| Property | Metric | Imperial |
|---|---|---|
| Tensile Strength (min) | 515 MPa | 74,700 psi |
| Yield Strength (0.2% offset, min) | 205 MPa | 29,700 psi |
| Elongation (min) | 40% | 40% |
| Hardness (Brinell, max) | 217 HB | 217 HB |
| Impact Strength | Excellent | Excellent |
Chemical Composition – SS 347H (UNS S34709)
| Element | Composition % |
|---|---|
| Carbon (C) | 0.04 – 0.10 |
| Manganese (Mn) | ≤ 2.0 |
| Phosphorus (P) | ≤ 0.045 |
| Sulfur (S) | ≤ 0.030 |
| Silicon (Si) | ≤ 0.75 |
| Chromium (Cr) | 17.0 – 19.0 |
| Nickel (Ni) | 9.0 – 13.0 |
| Columbium + Tantalum (Cb + Ta) | 10 x C min – 1.0 |
| Iron (Fe) | Balance |
Physical Properties – Stainless Steel UNS S34700 Pipe Elbow
| Property | Value |
|---|---|
| Density | 7.96 g/cm³ |
| Melting Range | 1398 – 1446 °C |
| Specific Heat Capacity | 500 J/kg·K |
| Thermal Conductivity (at 100 °C) | 16.3 W/m·K |
| Electrical Resistivity | 0.000072 Ω·cm (at 20 °C) |
| Modulus of Elasticity | 193 GPa |
Stainless Steel 347 vs 347H Buttweld Fittings
| Property | SS 347 | SS 347H |
|---|---|---|
| Carbon Content | Low Carbon | Higher Carbon (0.04–0.10%) |
| Strength | Good | Higher creep and tensile strength |
| High-Temperature Resistance | Suitable up to 870°C | Superior performance above 1000°F (538°C) |
| Applications | General purpose | High-temperature, high-pressure environments |
Advantages of Using 347H Buttweld Fittings
- Long service life with minimal maintenance
- Suitable for cryogenic to high-temperature applications
- Excellent resistance to chloride stress corrosion cracking
- Better performance than standard 304/316 grades in high-temperature service
- Provides strong, leak-proof welded joints
Why Choose Solitaire Fittings for Stainless Steel 347H Buttweld Fittings?
- Leading Manufacturer in India – With decades of experience, Solitaire Fittings is a trusted ASTM A403 WP 347H Stainless Steel Buttweld Fittings Manufacturer in India.
- Global Exporter – We are recognized among the top 347H SS Industrial Pipe Fittings Distributors worldwide.
- Certified Quality – Our fittings comply with ASTM, ASME, ANSI, DIN, and ISO standards.
- Wide Range – From SS 347H Elbow to ANSI B16.9 SS 347H Pipe Cap, we stock a complete inventory.
- Custom Solutions – We manufacture fittings as per customer designs and project requirements.
- On-time Delivery – Our efficient logistics ensure timely delivery across India, the Middle East, Europe, Asia, and the USA.
Stainless Steel 347H Buttweld Fittings Manufacturer & Supplier in India
If you’re looking for Stainless Steel 347/347H Buttweld Fittings, SS 347H Elbows, ANSI B16.9 SS 347H Pipe Cap, ASME SA 403 SS 347H Pipe Bend, or any other related fittings, Solitaire Fittings is your one-stop solution.
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