Stainless Steel 347 Welded Tubes

Kamal Steels is a leading Manufacturer and Stockist of Stainless Steel 347 Welded Tubes, supplying premium-quality welded tubing solutions for power generation, aerospace, petrochemical plants, refineries, heat exchangers, pressure vessels, and other high-temperature industrial applications. Manufactured from Stainless Steel 347 (UNS S34700 / WNR 1.4550), our welded tubes are produced in accordance with ASTM A249, ASTM A269, ASTM A270, ASTM A554, and ASME SA249 standards, ensuring outstanding dimensional accuracy, superior weld quality, excellent oxidation resistance, and dependable mechanical performance. Stainless Steel 347 is a niobium (columbium)-stabilized austenitic stainless steel specifically developed to resist carbide precipitation and intergranular corrosion during welding and prolonged high-temperature service.

Our Stainless Steel 347 Welded Tubes are manufactured using premium-quality stainless steel strips that are precision roll-formed and automatically welded using advanced TIG/ERW welding technology. The tubes are subsequently solution annealed, pickled, straightened, polished, and thoroughly inspected to achieve smooth surface finishes, excellent dimensional tolerances, and extended service life. These welded tubes provide excellent resistance to oxidation, scaling, thermal fatigue, and intergranular corrosion, making them ideal for boilers, superheaters, heat exchangers, pressure vessels, aircraft exhaust systems, refinery equipment, chemical processing units, and nuclear processing piping operating under elevated-temperature conditions.

At Kamal Steels, we maintain a comprehensive inventory of ASTM A249 Stainless Steel 347 Welded Tubes in various outside diameters, wall thicknesses, schedules, surface finishes, and custom lengths to meet urgent domestic and international project requirements. Every tube undergoes rigorous quality inspections, including Positive Material Identification (PMI), Chemical Analysis, Mechanical Testing, Hydrostatic Testing, Eddy Current Testing, Dimensional Inspection, Surface Finish Inspection, and Visual Inspection before dispatch. With certified quality, competitive pricing, export-standard packaging, and prompt worldwide delivery, Kamal Steels has established itself as a trusted manufacturer and supplier of Stainless Steel 347 Welded Tubes for critical high-temperature and corrosion-resistant industrial applications across global markets.

Stainless Steel 347 Welded Tubes are specifically engineered for elevated-temperature applications requiring excellent oxidation resistance, superior weld stability, and outstanding resistance to intergranular corrosion. Grade 347 is a niobium (columbium)-stabilized austenitic stainless steel that prevents chromium carbide precipitation during welding and prolonged heating, ensuring improved structural stability and corrosion resistance in demanding operating environments. Manufactured using premium-quality stainless steel strips and advanced TIG/ERW welding technology, these welded tubes provide exceptional dimensional accuracy, smooth surface finishes, and dependable long-term performance.

One of the major advantages of Stainless Steel 347 Welded Tubes is their ability to maintain excellent mechanical strength and oxidation resistance during continuous exposure to elevated temperatures. Their superior resistance to thermal fatigue, scaling, and intergranular corrosion makes them suitable for boilers, superheaters, heat exchangers, pressure vessels, refinery equipment, aerospace components, exhaust systems, petrochemical plants, nuclear facilities, and power generation industries. The niobium stabilization enhances weld integrity, allowing these tubes to perform reliably under severe thermal cycling conditions.

At Kamal Steels, we manufacture and supply premium-quality ASTM A249 Stainless Steel 347 Welded Tubes produced according to international quality standards. Every welded tube undergoes comprehensive quality inspections, including Mechanical Testing, Chemical Analysis, Positive Material Identification (PMI), Hydrostatic Testing, Eddy Current Testing, Dimensional Inspection, Surface Finish Inspection, and Visual Inspection to ensure exceptional product quality, reliability, and complete customer satisfaction.

• Excellent resistance to oxidation and scaling at elevated temperatures.
• Niobium (Columbium)-stabilized grade for improved weld stability.
• Outstanding resistance to intergranular corrosion.
• Superior high-temperature mechanical strength.
• Excellent weldability and fabrication characteristics.
• High resistance to thermal fatigue and thermal cycling.
• Superior dimensional accuracy and uniform wall thickness.
• Smooth internal and external surface finish.
• Available in various sizes, finishes, and custom lengths.
• Supplied with complete material traceability and EN 10204 3.1 certification.
• Long service life with minimal maintenance requirements.
• Ideal for aerospace, petrochemical, refinery, nuclear, power generation, and heat exchanger applications.

Kamal Steels supplies Stainless Steel 347 Welded Tubes in a comprehensive range of dimensions, schedules, surface finishes, and international specifications to meet the requirements of aerospace, petrochemical plants, oil refineries, nuclear facilities, power generation stations, heat exchangers, boilers, pressure vessels, and other elevated-temperature industrial applications. Our welded tubes are manufactured under stringent quality control procedures to ensure superior weld integrity, excellent dimensional accuracy, and dependable long-term performance in demanding service conditions.

Stainless Steel 347 Welded Tubes are extensively used in industries requiring exceptional oxidation resistance, excellent high-temperature strength, and outstanding resistance to intergranular corrosion after welding. The niobium (columbium) stabilization improves structural stability during prolonged exposure to elevated temperatures, making these welded tubes highly suitable for applications involving continuous heating, thermal cycling, and corrosive operating environments.

• Power Generation Plants
• Petrochemical Processing Facilities
• Oil & Gas Refineries
• Nuclear Power Plants
• Heat Exchangers & Condensers
• Industrial Boilers & Superheaters
• Pressure Vessels
• Chemical Processing Equipment
• Aerospace Components
• Exhaust Systems
• Industrial Furnaces
• High-Temperature Process Piping

At Kamal Steels, every Stainless Steel 347 Welded Tube undergoes comprehensive inspection and testing to ensure compliance with ASTM, ASME, and customer specifications. Each welded tube is carefully tested for chemical composition, weld integrity, dimensional accuracy, mechanical properties, and surface quality before dispatch.

• Positive Material Identification (PMI)
• Chemical Composition Analysis
• Mechanical Property Testing
• Hydrostatic Testing
• Eddy Current Testing (ECT)
• Ultrasonic Testing (UT)
• Dimensional Inspection
• Surface Finish Inspection
• Visual Inspection
• Flattening & Flaring Tests
• Third-Party Inspection Available on Request

Kamal Steels follows international export packaging standards to ensure that Stainless Steel 347 Welded Tubes are delivered safely without damage during transportation and storage. Tubes are protected with plastic end caps, securely bundled, wrapped with protective materials, and packed in fumigated wooden boxes, export-quality wooden crates, or pallets to prevent moisture, scratches, dents, and transit damage.

Each welded tube is permanently marked with the material grade, specification, size, schedule, heat number, manufacturer's identification, and batch details for complete material traceability. Every shipment is supplied with EN 10204 3.1/3.2 Mill Test Certificates, inspection reports, packing lists, commercial invoices, certificates of compliance, and third-party inspection certificates whenever requested, ensuring complete documentation for domestic and international industrial projects.

Kamal Steels is a trusted manufacturer, supplier, stockist, and exporter of Stainless Steel 347 Welded Tubes, supplying premium-quality stainless steel tubing solutions for petrochemical plants, power generation facilities, oil refineries, nuclear industries, aerospace applications, heat exchangers, boilers, pressure vessels, and other demanding high-temperature industrial environments. Manufactured according to ASTM and ASME standards, our welded tubes provide excellent oxidation resistance, superior weld stability, outstanding mechanical strength, and reliable long-term performance under continuous elevated-temperature service.

We maintain a comprehensive inventory of ASTM A249 Stainless Steel 347 Welded Tubes in various outside diameters, wall thicknesses, schedules, surface finishes, and custom lengths to meet urgent domestic and international project requirements. Every welded tube undergoes comprehensive quality inspections, including Positive Material Identification (PMI), Chemical Analysis, Mechanical Testing, Hydrostatic Testing, Ultrasonic Testing, Eddy Current Testing, Dimensional Inspection, Surface Finish Inspection, and Visual Inspection to ensure complete compliance with international quality standards and customer specifications.

With decades of manufacturing expertise, ready stock availability, competitive pricing, certified quality, export-standard packaging, and a strong global supply network, Kamal Steels has become the preferred manufacturer and supplier of Stainless Steel 347 Welded Tubes across international markets. Our commitment to quality, technical support, prompt delivery, and complete documentation enables us to provide dependable stainless steel tubing solutions for the most demanding high-temperature and corrosion-resistant industrial applications worldwide.

• Leading manufacturer, supplier, stockist, and exporter of Stainless Steel 347 Welded Tubes.
• Large ready stock for immediate domestic and international supply.
• Manufactured according to ASTM A249, ASTM A269, ASTM A270, ASTM A554, ASME SA249, and ASME SA269 standards.
• Niobium (Columbium)-stabilized grade for superior weld stability.
• Excellent resistance to oxidation, scaling, and intergranular corrosion.
• Outstanding performance during continuous high-temperature operation.
• Comprehensive quality inspection before every shipment.
• EN 10204 3.1/3.2 Mill Test Certificates with complete material traceability.
• Competitive pricing with consistent product availability.
• Export-standard packaging for safe worldwide transportation.
• Prompt worldwide delivery with complete export documentation.