Stainless Steel 347H Welded Tubes

Kamal Steels is a leading Manufacturer and Stockist of Stainless Steel 347H Welded Tubes, supplying premium-quality welded tubing solutions for thermal power plants, petrochemical facilities, oil refineries, industrial boilers, superheaters, heat exchangers, pressure vessels, and other high-temperature industrial applications. Manufactured from Stainless Steel 347H (UNS S34709 / WNR 1.4961), 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 347H is the high-carbon version of SS 347, specifically developed to provide enhanced creep strength and improved mechanical stability during prolonged service above 537°C while maintaining outstanding resistance to intergranular corrosion.

Our Stainless Steel 347H 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 long service life. These welded tubes provide exceptional resistance to oxidation, scaling, thermal fatigue, and high-temperature corrosion, making them ideal for boilers, radiant superheaters, refinery piping, furnace components, exhaust systems, chemical processing equipment, and thermal power plant applications operating under continuous elevated-temperature conditions.

At Kamal Steels, we maintain a comprehensive inventory of ASTM A249 Stainless Steel 347H 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 347H Welded Tubes for critical high-temperature industrial applications across global markets.

Stainless Steel 347H Welded Tubes are specifically developed for elevated-temperature applications requiring enhanced creep strength, superior oxidation resistance, and excellent long-term mechanical stability. As the high-carbon version of Stainless Steel 347, Grade 347H provides improved strength during prolonged exposure to high temperatures while retaining the benefits of niobium (columbium) stabilization, which minimizes carbide precipitation and enhances resistance to intergranular corrosion after welding. 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 service life.

One of the major advantages of Stainless Steel 347H Welded Tubes is their excellent resistance to oxidation, scaling, thermal fatigue, and high-temperature corrosion. Their enhanced creep resistance makes them ideal for continuous service in boilers, superheaters, industrial furnaces, heat exchangers, pressure vessels, refinery equipment, exhaust systems, petrochemical plants, power generation facilities, and chemical processing industries operating under severe thermal conditions. The niobium stabilization also improves weld integrity and provides excellent structural stability during repeated heating and cooling cycles.

At Kamal Steels, we manufacture and supply premium-quality ASTM A249 Stainless Steel 347H 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.

• Enhanced creep strength for prolonged high-temperature service.
• Excellent resistance to oxidation and scaling.
• Niobium (Columbium)-stabilized grade for superior weld stability.
• Outstanding resistance to intergranular corrosion.
• Superior mechanical strength at elevated temperatures.
• Excellent weldability and fabrication characteristics.
• High resistance to thermal fatigue and thermal cycling.
• Superior dimensional accuracy and smooth 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 power generation, petrochemical plants, refineries, boilers, superheaters, and heat exchanger applications.

Kamal Steels supplies Stainless Steel 347H Welded Tubes in a comprehensive range of dimensions, schedules, surface finishes, and international specifications to meet the requirements of thermal power plants, petrochemical facilities, oil refineries, industrial boilers, heat exchangers, pressure vessels, furnaces, 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 under demanding operating conditions.

Stainless Steel 347H Welded Tubes are extensively used in industries requiring exceptional high-temperature strength, enhanced creep resistance, and outstanding oxidation resistance during prolonged service. The high carbon content improves mechanical strength at elevated temperatures, while niobium (columbium) stabilization minimizes carbide precipitation after welding, making these welded tubes ideal for continuous high-temperature industrial applications.

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

At Kamal Steels, every Stainless Steel 347H 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 347H 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 347H Welded Tubes, supplying premium-quality stainless steel tubing solutions for thermal power plants, petrochemical facilities, oil refineries, industrial boilers, heat exchangers, pressure vessels, steam generation systems, and other demanding high-temperature industrial applications. Manufactured according to ASTM and ASME standards, our welded tubes provide excellent oxidation resistance, enhanced creep strength, superior weld stability, and reliable long-term performance during continuous elevated-temperature service.

We maintain a comprehensive inventory of ASTM A249 Stainless Steel 347H 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 347H 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 industrial applications worldwide.

• Leading manufacturer, supplier, stockist, and exporter of Stainless Steel 347H 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.
• High-carbon, niobium (columbium)-stabilized grade for enhanced creep strength.
• Excellent resistance to oxidation, scaling, thermal fatigue, and intergranular corrosion.
• Outstanding performance during prolonged high-temperature service.
• 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.