Stainless Steel 347 Tube Fittings Manufacturer, Supplier & Exporter in India
Stainless Steel 347 Tube Fittings are widely used in industries that require exceptional resistance to corrosion, oxidation, and high-temperature service. Manufactured using stabilized austenitic stainless steel with the addition of niobium (columbium), SS 347 fittings offer superior resistance to intergranular corrosion after welding and prolonged exposure to elevated temperatures. These high-temperature tube fittings are ideal for demanding applications in petrochemical plants, power generation, refineries, heat exchangers, pharmaceutical processing, chemical industries, and instrumentation systems.
As experienced Stainless Steel 347 Compression Fitting Manufacturers, we produce precision-engineered tube fittings that ensure leak-proof performance, excellent mechanical strength, and long service life even under extreme operating conditions. Every fitting is manufactured under strict quality control procedures and conforms to international ASTM, ASME, and ISO standards to meet the expectations of global industries.
Whether you require instrumentation tube fittings, compression fittings, single ferrule fittings, or double ferrule fittings, we provide reliable solutions designed for safety, durability, and maximum system efficiency.
What Are Stainless Steel 347 Tube Fittings?
Stainless Steel 347 Tube Fittings are precision components designed to connect, control, redirect, or terminate tubing systems used in high-pressure and high-temperature applications. Grade 347 contains chromium, nickel, and niobium, which stabilize the alloy and prevent chromium carbide precipitation during welding.
This stabilization makes SS 347 pipe fittings particularly suitable for applications where welded components operate continuously between 427°C and 816°C without losing corrosion resistance.
Our product range includes Compression Tube Fittings, Instrumentation Tube Fittings, Male Connectors, Female Connectors, Elbows, Tees, Reducers, Bulkhead Unions, Tube Adapters, Union Crosses, Needle Valve Connectors, Ferrule Fittings, Tube End Caps, and Pipe Connectors. Each fitting is manufactured with precision machining to provide consistent sealing performance and vibration resistance.
Features of Stainless Steel 347 Tube Fittings
Our SS 347 tube fittings are designed for long-term performance in aggressive industrial environments. Key features include:
- Excellent Corrosion Resistance: The niobium stabilization in 347 stainless steel prevents intergranular corrosion, especially in welded zones and high-temperature environments.
- Outstanding Oxidation Resistance: These corrosion-resistant tube fittings maintain structural integrity at elevated temperatures, making them ideal for continuous high-heat service.
- Excellent Weldability: This alloy exhibits superior weldability, allowing it to be fabricated into various fitting configurations without compromising structural integrity.
- Leak-Proof Sealing Performance: Precision tube connectors manufactured from SS 347 provide consistent, reliable seals even under high-vibration and high-pressure conditions.
- High Vibration Resistance: These hydraulic tube fittings are engineered to withstand mechanical stress and vibration, reducing the risk of connection failure in dynamic systems.
- Long Service Life: Manufactured to ASTM and ASME standards, these seamless tube fittings are built to deliver maximum durability and minimal maintenance over extended service periods.
Stainless Steel 347 Compression Fittings
As trusted Stainless Steel 347 Compression Fitting Manufacturers, we produce compression fittings that provide secure, leak-tight tube connections without welding. These 347 compression fittings offer numerous operational advantages:
- Eliminate Leakage: The precision-engineered ferrule design ensures complete leak elimination in process instrumentation fittings, critical in chemical and petrochemical environments.
- Simplified Installation: Compression tube connectors are designed for straightforward assembly, reducing installation time and labour costs significantly.
- Reliable Under Vibration: These high-pressure tube fittings maintain pressure integrity in high-vibration environments such as offshore platforms and heavy industrial plants.
- Reduced Maintenance Costs: The superior corrosion resistance of ASTM A276 SS 347 fittings minimises the need for frequent replacement, lowering total lifecycle costs.
- Improved System Safety: Engineered for critical applications, these fittings meet strict safety requirements in industries where operational integrity is non-negotiable.
- Versatile Range: Available as straight connectors, elbows, tee connectors, reducing unions, bulkhead connectors, caps, plugs, and adapters to suit diverse system requirements.
Schedule and Size Chart
| Fitting Type | Nominal Pipe Size (NPS) | Outside Diameter (OD) | Wall Thickness (WT) | Length (L) |
| Elbow | 1/2″ to 12″ | Varies by size | Varies by size | Varies |
| Tees | 1/2″ to 12″ | Varies by size | Varies by size | Varies |
| Reducers | 1/2″ to 12″ | Varies by size | Varies by size | Varies |
| Caps | 1/2″ to 12″ | Varies by size | Varies by size | Varies |
| Flanges | 1/2″ to 12″ | Varies by size | Varies by size | Varies |
Mechanical Properties Chart
| Property | Value |
| Tensile Strength | 515 MPa (75 ksi min) |
| Yield Strength | 205 MPa (30 ksi min) |
| Elongation | 40% (min) |
| Hardness | 201 HB Max |
| Impact Toughness | 60 ft-lb (81 J) at -320°F (-196°C) |
Specifications Chart
| Specification | Details |
| Standard | ASTM A182, ASTM A276, ASTM A479 |
| Grade | 347 / 347H |
| Size | 1/16″ to 2″ |
| Pressure Rating | Up to 10,000 PSI |
| Connection Type | Compression, Threaded |
| Surface Finish | Bright, Electro Polished, Passivated |
| Thread Standards | NPT, BSPT, BSPP, SAE, ISO |
| Temperature Range | Up to 1600°F (870°C) |
Chemical Composition Chart
| Element | Composition (wt%) |
| Chromium (Cr) | 17.0–19.0 |
| Nickel (Ni) | 9.0–13.0 |
| Iron (Fe) | Balance |
| Niobium + Tantalum (Nb+Ta) | Stabilized |
| Manganese (Mn) | 2.0 max |
| Silicon (Si) | 1.0 max |
| Carbon (C) | 0.08 max |
| Phosphorus (P) | 0.045 max |
| Sulfur (S) | 0.030 max |
Physical Properties Chart
| Property | Value |
| Density | 8.03 g/cm³ (0.290 lb/in³) |
| Melting Point | 2550°F (1400°C) |
| Thermal Conductivity | 10.4 W/m·K |
| Electrical Resistivity | 0.72 µΩ·cm |
| Coefficient of Thermal Expansion | 16.0 µm/m·°C |
Application Chart
| Industry | Application |
| Chemical Processing | Piping systems for acids, chemicals, and corrosive media |
| Oil and Gas / Petrochemical | Instrumentation and pipeline fittings in harsh refinery environments |
| Power Generation | High-pressure steam systems and thermal power stations |
| Food and Beverage | Sanitary processing and handling equipment |
| Pharmaceuticals | Sterile instrumentation and process control systems |
| Aerospace | High-temperature components and hydraulic systems |
In summary, SS 347 fittings — including ASTM A182 347H double ferrule tube fittings, single ferrule fittings, and instrumentation tube fittings — are the preferred choice for demanding industrial applications where leak-proof performance, intergranular corrosion resistance, and high-temperature stability are critical. Their superior mechanical properties, broad industrial applicability, and compliance with international standards make them a reliable long-term investment.
At ASC LLP, we offer a comprehensive range of 347 SS fittings, from precision compression tube fittings to specialized SS 347H instrumentation fittings, ensuring you find the exact components for your project requirements. Whether you need standard sizes or custom-engineered solutions, our expert team is committed to delivering products that meet the highest quality benchmarks. Contact us today to discuss your requirements or request a quote.
Global Reach
ASC LLP boasts a robust global presence, committed to delivering unparalleled service and quality to clients around the world. As leading ASTM A276 SS 347 Single Ferrule Fitting Exporters in India and ASTM A182 Stainless Steel 347H Double Ferrule Tube Fittings Suppliers in India, our dedication to prompt delivery and exceptional customer care sets us apart. Major corporations across the USA, Europe, Asia, and other regions place their trust in our high-quality Stainless Steel 347 Tube Fittings. This widespread trust underscores our reputation for reliability and excellence in supplying leak-proof tube fittings and industrial instrumentation fittings to demanding global markets.
Countries We Export To
UNITED STATES, EUROPE, UK, UAE, SAUDI ARABIA, OMAN, KUWAIT, JORDAN, QATAR, INDONESIA, MALAYSIA, BRAZIL, SPAIN, ITALY, FRANCE, GERMANY, BAHRAIN, SRI LANKA, AZERBAIJAN, AUSTRALIA, AUSTRIA, PHILIPPINES, TURKEY, RUSSIA, IRAN, IRAQ, CANADA, KOREA, JAPAN, YEMEN, FINLAND, ZIMBABWE, HUNGARY, PORTUGAL, VIETNAM, MOROCCO, THAILAND, SOUTH AFRICA, MEXICO, SINGAPORE, GREECE, KUWAIT, POLAND, NEW ZEALAND, SWEDEN, SWITZERLAND, BELGIUM, BHUTAN, BANGLADESH, TAIWAN, ROMANIA, CAMBODIA, KAZAKHSTAN, AFGHANISTAN.
