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Girgaon, Mumbai - 400004
Stainless Steel Welded Tubes Manufacturer in India
Trusted Global Manufacturer & Stockist of Stainless Steel Welded Tubes
Kamal Steels, established in 1984, is a trusted Stainless Steel Welded Tube Manufacturer and Stockist in India. We manufacture and supply precision-engineered tubing for industrial, process, and engineering applications in compliance with international quality standards.
Our product range includes grades 304, 304L, 316, 316L, 321, 347, and 904L, available in round, square, and rectangular forms with a variety of sizes, wall thicknesses, and surface finishes. These tubes are widely used in heat exchangers, instrumentation systems, chemical processing, food processing, pharmaceuticals, construction, and power generation.
All products are manufactured in accordance with ASTM A249, ASTM A269, ASTM A554, and relevant ASME specifications to ensure dimensional accuracy, strong weld integrity, corrosion resistance, and long service life. Every tube undergoes strict quality inspection before dispatch to deliver consistent performance in demanding industrial environments.
With ready stock, competitive pricing, custom manufacturing options, and timely worldwide delivery, Kamal Steels has become a preferred supplier for industrial and engineering projects across India and global markets since 1984.
Looking for ASTM A249, ASTM A269, or ASTM A554 Stainless Steel Welded Tubes? Contact Kamal Steels today for product specifications, pricing, custom sizes, and fast delivery for your project requirements.
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Stainless Steel Welded Tube Specifications
| Product | Stainless Steel Welded Tubes |
|---|---|
| Brand | Kamal Steels |
| Material | Stainless Steel |
| Manufacturing Process | Electric Resistance Welded (ERW), TIG Welded, Laser Welded |
| Available Grades | 304, 304L, 316, 316L, 321, 347, 310S, 904L |
| Outside Diameter (OD) | 6.00 mm to 219.10 mm |
| Wall Thickness | 0.5 mm to 12.7 mm |
| Length | 6 Meter, Single Random, Double Random, Cut Length |
| Tube Ends | Plain End, Beveled End |
| Surface Finish | Mill Finish, Annealed & Pickled (AP), Bright Annealed (BA), Polished |
| Standards | ASTM A269, ASME SA269 |
| Testing | PMI, Hydrostatic, Eddy Current, Flattening, Flaring & Third-Party Inspection |
| Applications | Instrumentation, process piping, food processing, pharmaceutical, chemical, water treatment, general engineering |
Stainless Steel Welded Tube Size Chart
The following chart shows the standard outside diameter (OD) sizes available for stainless steel welded tubes manufactured in accordance with ASTM A249, ASTM A269 and ASTM A554 specifications.
| NPS (Inch) | OD (mm) | SCH 5S (kg/m) | SCH 10S (kg/m) | SCH 40S (kg/m) | SCH 80S (kg/m) |
|---|---|---|---|---|---|
| 1/8" | 10.3 | 0.24 | 0.24 | 0.32 | 0.43 |
| 1/4" | 13.7 | 0.33 | 0.44 | 0.58 | 0.77 |
| 3/8" | 17.1 | 0.42 | 0.55 | 0.76 | 1.03 |
| 1/2" | 21.3 | 0.64 | 0.81 | 1.27 | 1.69 |
| 3/4" | 26.7 | 0.81 | 1.03 | 1.69 | 2.25 |
| 1" | 33.4 | 1.31 | 2.11 | 2.50 | 3.24 |
| 1 1/4" | 42.2 | 1.68 | 2.69 | 3.56 | 4.72 |
| 1 1/2" | 48.3 | 1.93 | 3.09 | 4.05 | 5.56 |
| 2" | 60.3 | 2.42 | 4.05 | 5.44 | 7.48 |
| 2 1/2" | 73.0 | 3.67 | 5.25 | 8.63 | 11.43 |
| 3" | 88.9 | 4.49 | 6.49 | 11.29 | 15.27 |
| 3 1/2" | 101.6 | 5.17 | 7.48 | 13.57 | 18.72 |
| 4" | 114.3 | 5.84 | 8.46 | 16.07 | 22.32 |
| 5" | 141.3 | 9.18 | 11.19 | 21.77 | 31.06 |
| 6" | 168.3 | 10.94 | 13.43 | 28.26 | 42.56 |
| 8" | 219.1 | 14.37 | 19.46 | 42.55 | 63.49 |
Stainless Steel Welded Tube Wall Thickness Chart
| Tube OD (mm) | 0.5 mm | 0.8 mm | 1.0 mm | 1.2 mm | 1.5 mm | 2.0 mm | 3.0 mm |
|---|---|---|---|---|---|---|---|
| 12.70 | ✓ | ✓ | ✓ | ✓ | ✓ | - | - |
| 19.05 | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ | - |
| 25.40 | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ |
| 38.10 | - | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ |
| 50.80 | - | - | ✓ | ✓ | ✓ | ✓ | ✓ |
| 63.50 | - | - | - | ✓ | ✓ | ✓ | ✓ |
| 76.20 | - | - | - | ✓ | ✓ | ✓ | ✓ |
| 101.60 | - | - | - | - | ✓ | ✓ | ✓ |
Stainless Steel Welded Tube Dimensions Chart
| Tube Size (Inch) | Outside Diameter (OD) mm | Wall Thickness Range (mm) | Standard Length |
|---|---|---|---|
| 1/8" | 6.35 | 0.5 – 1.2 | 6 m / Cut Length |
| 1/4" | 9.53 | 0.5 – 1.5 | 6 m / Cut Length |
| 3/8" | 12.70 | 0.5 – 2.0 | 6 m / Cut Length |
| 1/2" | 15.88 | 0.5 – 2.0 | 6 m / Cut Length |
| 3/4" | 22.23 | 0.8 – 2.5 | 6 m / Cut Length |
| 1" | 25.40 | 1.0 – 3.0 | 6 m / Cut Length |
| 1 1/4" | 31.75 | 1.2 – 3.0 | 6 m / Cut Length |
| 1 1/2" | 38.10 | 1.2 – 3.0 | 6 m / Cut Length |
| 2" | 50.80 | 1.5 – 4.0 | 6 m / Cut Length |
| 2 1/2" | 63.50 | 2.0 – 4.0 | 6 m / Cut Length |
| 3" | 76.20 | 2.0 – 4.0 | 6 m / Cut Length |
| 4" | 101.60 | 2.0 – 6.0 | 6 m / Cut Length |
Chemical Composition of Stainless Steel Welded Tubes
| Grade | C | Mn | Si | Cr | Ni | Mo |
|---|---|---|---|---|---|---|
| 304 | 0.08 | 2.00 | 0.75 | 18.0-20.0 | 8.0-10.5 | - |
| 304L | 0.03 | 2.00 | 0.75 | 18.0-20.0 | 8.0-12.0 | - |
| 316 | 0.08 | 2.00 | 0.75 | 16.0-18.0 | 10.0-14.0 | 2.0-3.0 |
| 316L | 0.03 | 2.00 | 0.75 | 16.0-18.0 | 10.0-14.0 | 2.0-3.0 |
Mechanical Properties of Stainless Steel Welded Tubes
| Grade | Tensile Strength (MPa) | Yield Strength (MPa) | Elongation (%) | Hardness (HB) |
|---|---|---|---|---|
| 304 | 515 | 205 | 40 | 201 |
| 304L | 485 | 170 | 40 | 201 |
| 316 | 515 | 205 | 40 | 217 |
| 316L | 485 | 170 | 40 | 217 |
Grades of Stainless Steel Welded Tubes
Kamal Steels manufactures the following grades of stainless steel welded tubes:
- Stainless Steel 304 Welded Tubes
- Stainless Steel 304L Welded Tubes
- Stainless Steel 304H Welded Tubes
- Stainless Steel 310 Welded Tubes
- Stainless Steel 310S Welded Tubes
- Stainless Steel 310H Welded Tubes
- Stainless Steel 316 Welded Tubes
- Stainless Steel 316L Welded Tubes
- Stainless Steel 316H Welded Tubes
Surface Finish of Stainless Steel Welded Tubes
| Surface Finish | Description | Common Applications |
|---|---|---|
| Mill Finish (MF) | Standard finish after manufacturing. | Industrial piping & fabrication |
| Annealed & Pickled (AP) | Heat treated and acid cleaned for corrosion resistance. | Chemical & process industries |
| Bright Annealed (BA) | Smooth, bright and reflective finish. | Pharmaceutical & food processing |
| 180 Grit Polish | Satin finish with moderate smoothness. | Architectural applications |
| 240 Grit Polish | Fine brushed finish. | Decorative & fabrication |
| 320 Grit Polish | Smooth polished surface. | Food equipment & process plants |
| Mirror Finish (600 Grit) | Highly reflective decorative finish. | Interior, architectural & ornamental use |
Features of Stainless Steel Welded Tubes
Stainless steel welded tubes provide excellent strength, corrosion resistance, and dimensional consistency, making them suitable for a wide range of industrial and commercial applications.
- Excellent corrosion resistance.
- Tight dimensional tolerances.
- Smooth surface finish.
- Suitable for general service and process applications.
- Available in multiple grades and sizes.
- Easy to fabricate and install.
- Cost-effective alternative for many industrial uses.
- Reliable mechanical performance.
Applications of Stainless Steel Welded Tubes
Stainless steel welded tubes are widely used in industries requiring excellent corrosion resistance, dimensional accuracy, and reliable performance.
Instrumentation Systems
Precision tubing for instrumentation, hydraulic and pneumatic control systems.
Process Piping Systems
Suitable for transporting liquids, gases and process media in industrial facilities.
Chemical Processing Plants
Handles corrosive chemicals and process fluids with excellent durability.
Food & Beverage Processing
Provides hygienic, easy-to-clean tubing for food and beverage production lines.
Pharmaceutical Manufacturing
Ideal for contamination-free process piping in pharmaceutical facilities.
Water Treatment Plants
Used in water purification, desalination and wastewater treatment systems.
Engineering & Fabrication
Suitable for industrial fabrication, machinery and general engineering projects.
Marine & Coastal Applications
Offers excellent resistance to seawater and harsh marine environments.
Utility & Service Piping
Used for compressed air, water supply and other industrial utility services.
Industries We Serve
Kamal Steels supplies stainless steel welded tubes to industries worldwide for corrosion-resistant and industrial process applications.
Refineries
Our stainless steel welded tubes are widely used in refinery applications for process and utility systems.
Fertilizer Plants
Fertilizer industries require corrosion-resistant welded stainless tubing for chemical processing operations.
Cement Plants
These stainless steel welded tubes are suitable for industrial equipment and material handling systems.
Engineering Industry
Engineering sectors use welded stainless steel tubes for fabrication and industrial systems.
Offshore Industry
Offshore applications require durable stainless steel welded tubing with reliable corrosion resistance.
Automobile Industry
Automobile industries use stainless steel welded tubes in exhaust systems and fluid transportation applications.
Frequently Asked Questions
A stainless steel welded tube is manufactured by forming stainless steel strip or coil into a tubular shape and joining the edges through a welding process. Welded tubes offer excellent dimensional accuracy, smooth surface finish and cost-effective performance for industrial applications.
Stainless steel welded tubes are available in grades such as SS 304, 304L, 316, 316L, 321, 347 and 904L. The selection depends on the required corrosion resistance, operating temperature and application requirements.
Stainless steel welded tubes are commonly manufactured according to ASTM A249, ASTM A269, ASTM A554, ASTM A688, ASME SA249 and ASME SA269 standards to ensure quality, strength and dimensional accuracy.
Welded tubes are produced by welding rolled stainless steel strips, while seamless tubes are manufactured without any welded joint. Welded tubes are more economical and offer excellent dimensional consistency, whereas seamless tubes are preferred for extremely high-pressure applications.
Stainless steel welded tubes are widely used in heat exchangers, condensers, food processing equipment, pharmaceutical plants, dairy industries, instrumentation systems, decorative applications and general industrial piping systems.
Stainless steel welded tubes are available in a wide range of outside diameters, wall thicknesses and lengths. Custom sizes and cut lengths can also be supplied according to project specifications and application requirements.
SS 316 and SS 316L welded tubes are commonly recommended for corrosive environments due to their enhanced resistance to chlorides, chemicals and marine exposure. For highly aggressive conditions, SS 904L may be considered.
Stainless steel welded tubes undergo Hydrostatic Testing, Eddy Current Testing, PMI Testing, Flattening Tests, Flaring Tests, Mechanical Testing, Chemical Analysis and Dimensional Inspection to ensure compliance with international standards.
Yes, stainless steel welded tubes are supplied with Mill Test Certificates (MTC) that confirm the chemical composition, mechanical properties and compliance with applicable ASTM and ASME standards.
The price of stainless steel welded tubes depends on the grade, size, wall thickness, surface finish, quantity and testing requirements. Contact our sales team for the latest pricing, stock availability and delivery schedule.