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Girgaon, Mumbai - 400004
Stainless Steel Welded Tubes Manufacturer in India
Stainless Steel Welded Tube Manufacturer in India
Kamal Steels is a leading Stainless Steel Welded Tube Manufacturer and Stockist in India, We specialize in manufacturing welded stainless steel tubes for industrial, process and engineering applications with complete specifications, sizes and international standards compliance.
Our company is recognized among leading stainless steel welded tube manufacturers offering precision-engineered products in grades 304, 304L, 316, 316L, 321, 347 and 904L. These stainless steel welded tubes are widely used in heat exchangers, instrumentation systems, food processing and chemical industries.
As experienced welded stainless steel tube manufacturers, we supply welded stainless tubing in round, square and rectangular forms with accurate dimensions and superior surface finish. Our production process ensures strong weld integrity, corrosion resistance and long service life.
Kamal Steels is also known as one of the reliable Stainless Steel Welded Tubes suppliers serving domestic and international markets. We manufacture and export welded stainless steel tubes in custom sizes, wall thicknesses and finishes according to project requirements.
Being a dependable stainless steel welded tubes manufacturer, we follow ASTM A249, ASTM A269, ASTM A554 and ASME standards for quality assurance. Our welded stainless steel tubes manufacturer expertise allows us to deliver high-performance tubing solutions for demanding industrial environments.
Why Stainless Steel Welded Tubes?
Stainless steel welded tubes are manufactured by forming stainless steel strips or coils into a tubular shape and welding the seam using advanced welding technology. These tubes provide excellent dimensional accuracy, smooth surface finish and strong mechanical performance for industrial and engineering applications. Stainless steel welded tubes are widely used where corrosion resistance, hygienic properties and cost-effective tubing solutions are required.
Stainless steel welded tubes are preferred for applications requiring precise dimensions, clean surface finish and reliable structural strength. Modern welding processes ensure strong weld integrity and consistent product quality. These welded stainless steel tubes are suitable for heat exchangers, instrumentation systems, food processing, pharmaceutical, chemical processing, water treatment and general engineering industries.
Why Choose Kamal Steels?
- Manufacturer & Stockist Since 1984
- Large Ready Stock Available
- ASTM & ASME Standard Tubes
- Third Party Inspection
- Mill Test Certificates Provided
- PAN India & Export Supply
- Competitive Prices
- Fast Delivery Support
Stainless Steel Welded Tube Specifications
| Product Name | Stainless Steel Welded Tubes |
|---|---|
| Brand | Kamal Steels |
| Material | Stainless Steel |
| Type | Welded Tube |
| Form | Round, Square, Rectangular |
| Outer Diameter | 6 mm to 219 mm |
| Wall Thickness | 0.5 mm to 12 mm |
| Length | Single Random, Double Random, Cut Length |
| Tube End | Plain End, Beveled End |
| Surface Finish | Annealed, Pickled, Polished, Bright Annealed |
| Standards | ASTM A249, ASTM A269, ASTM A554, ASME Standards |
| Tube Thickness | SCH 5S to SCH XXS |
Technical Overview
Our stainless steel welded tubes are suitable for applications requiring accurate dimensions, smooth surface finish and reliable mechanical performance. These welded stainless steel tubes are widely used in heat exchangers, instrumentation systems, food processing, pharmaceutical, chemical processing and general engineering industries where corrosion resistance and dimensional accuracy are important.
Kamal Steels manufactures welded stainless tubing using advanced welding processes to ensure strong weld integrity, excellent durability and long service life. Our stainless steel welded tubes are supplied in various grades, sizes and wall thicknesses according to industrial and project requirements.
Available 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
Stainless Steel Welded Tubes vs Seamless Tubes
The comparison between stainless steel welded tubes vs seamless tubes depends on manufacturing process, pressure requirements, dimensional accuracy and application requirements. Seamless tubes are manufactured without any welded joint, while stainless steel welded tubes are produced by forming stainless steel strips or coils into a tubular shape and welding the seam using advanced welding technology.
Stainless steel seamless tubes are generally preferred for high-pressure and critical industrial applications because they provide uniform structure and superior pressure handling capability. These tubes are widely used in heat exchangers, condensers, hydraulic systems and high-temperature process applications.
On the other hand, stainless steel welded tubes offer excellent dimensional accuracy, smooth surface finish and cost-effective performance for industrial and engineering applications. Modern welding processes ensure strong weld integrity and reliable mechanical properties, making welded stainless tubing suitable for food processing, pharmaceutical, instrumentation, chemical processing and structural applications.
Difference Between Stainless Steel Seamless and Welded Tubes
| Property | Seamless Tubes | Welded Tubes |
|---|---|---|
| Manufacturing Process | Manufactured without welding | Manufactured using welded seam |
| Strength | Higher pressure strength | Good mechanical strength |
| Surface Finish | Smooth internal finish | Smooth external and internal finish |
| Cost | Higher | More economical |
| Dimensional Accuracy | Moderate | Excellent |
| Pressure Handling | Suitable for high pressure | Suitable for low to medium pressure |
| Applications | Critical industrial service | General industrial applications |
| Availability | Limited large sizes | Wide range of sizes available |
Both seamless and welded stainless steel tubes offer excellent corrosion resistance, durability and long service life. The selection depends on operating pressure, application requirements, dimensional accuracy and project budget.
Stainless Steel Seamless Tube Manufacturing Process
Stainless steel seamless tubes are manufactured using high-quality stainless steel billets through advanced hot piercing and rolling processes. Since these tubes are produced without any welded seam, they provide excellent strength, pressure resistance and dimensional accuracy for critical industrial applications.
| Step 1 |
Raw Material Selection High quality stainless steel billets are selected as raw material according to the required grade and specifications. |
|---|---|
| Step 2 |
Billet Heating Billets are heated in a rotary hearth or walking beam furnace to the required temperature for further processing. |
| Step 3 |
Piercing The heated billet is pierced using a rotary piercing mill and mandrel to create a hollow shell. |
| Step 4 |
Elongation (Mannesmann Mill) The hollow shell is elongated and thinned by rolling between angled rolls to increase tube length and achieve required dimensions. |
| Step 5 |
Sizing The tube is passed through a sizing mill to achieve accurate diameter and wall thickness. |
| Step 6 |
Heat Treatment (Solution Annealing) Tubes are heat treated in a controlled atmosphere and rapidly cooled to obtain desired mechanical properties and corrosion resistance. |
| Step 7 |
Pickling Tubes are pickled in acid solution to remove scale and oxide from the surface and improve finish quality. |
| Step 8 |
Straightening Tubes are straightened to ensure proper straightness and dimensional accuracy. |
| Step 9 |
Cutting Tubes are cut into required lengths according to customer and project specifications. |
| Step 10 |
Testing & Inspection Tubes are tested for dimensions, mechanical properties, chemical composition and NDT methods such as UT, ET and HT to ensure quality compliance. |
| Step 11 |
Finished Product High quality stainless steel seamless tubes are cleaned, marked, packed and prepared for dispatch. |
Chemical Composition of Stainless Steel Welded Tubes
The chemical composition of stainless steel welded tubes plays an important role in corrosion resistance, weldability, strength and overall service performance. Different stainless steel grades are selected according to application requirements, operating temperature and corrosive environments.
| Grade | Cr % | Ni % | Mo % | C % | Mn % | Si % |
|---|---|---|---|---|---|---|
| 304 / 304L | 18.0–20.0 | 8.0–13.0 | — | 0.08 max / 0.03 max | 2.0 max | 1.0 max |
| 316 / 316L | 16.0–18.0 | 10.0–14.0 | 2.0–3.0 | 0.08 max / 0.03 max | 2.0 max | 1.0 max |
| 321 | 17.0–19.0 | 9.0–12.0 | — | 0.08 max | 2.0 max | 1.0 max |
| 347 | 17.0–19.0 | 9.0–13.0 | — | 0.08 max | 2.0 max | 1.0 max |
| 904L | 19.0–23.0 | 23.0–28.0 | 4.0–5.0 | 0.02 max | 2.0 max | 1.0 max |
Chemical Composition of High-Temperature Grades
Stainless steel welded tubes in grades such as 310, 321, 347 and their H versions are designed for elevated-temperature service and improved structural stability. These grades are commonly used in furnaces, boilers, heat exchangers and thermal processing systems.
Chemical Composition of Corrosion-Resistant Grades
Grades such as 316L and 904L contain higher nickel and molybdenum content, providing improved resistance against chlorides, acids and highly corrosive industrial environments. These welded stainless steel tubes are widely used in chemical processing, marine and pharmaceutical industries.
Stainless Steel Seamless Tube Size Chart & Dimensions
Schedule 40 and Schedule 80 Stainless Steel Welded Tubes
Schedule 40 and Schedule 80 are among the most commonly used wall thickness ranges in stainless steel welded tube systems. Schedule 40 stainless steel welded tubes are suitable for general industrial and engineering applications, while Schedule 80 welded stainless steel tubes provide thicker walls for higher pressure and demanding operating conditions.
Schedule 40S & Schedule 80S Stainless Steel Welded Tube Chart
| Tube Size | Outside Diameter | SCH 40S WT | SCH 80S WT |
|---|---|---|---|
| 1/8" | 10.3 mm | 1.73 mm | 2.41 mm |
| 1/4" | 13.7 mm | 2.24 mm | 3.02 mm |
| 3/8" | 17.1 mm | 2.31 mm | 3.20 mm |
| 1/2" | 21.3 mm | 2.77 mm | 3.73 mm |
| 3/4" | 26.7 mm | 2.87 mm | 3.91 mm |
| 1" | 33.4 mm | 3.38 mm | 4.55 mm |
| 1 1/4" | 42.2 mm | 3.56 mm | 4.85 mm |
| 1 1/2" | 48.3 mm | 3.68 mm | 5.08 mm |
| 2" | 60.3 mm | 3.91 mm | 5.54 mm |
| 2 1/2" | 73.0 mm | 5.16 mm | 7.01 mm |
| 3" | 88.9 mm | 5.49 mm | 7.62 mm |
| 4" | 114.3 mm | 6.02 mm | 8.56 mm |
| 5" | 141.3 mm | 6.55 mm | 9.52 mm |
| 6" | 168.3 mm | 7.11 mm | 10.97 mm |
| 8" | 219.1 mm | 8.18 mm | 12.70 mm |
| 10" | 273.0 mm | 9.27 mm | 12.70 mm |
| 12" | 323.9 mm | 9.52 mm | 12.70 mm |
| 14" | 355.6 mm | 9.52 mm | 12.70 mm |
| 16" | 406.4 mm | 9.52 mm | 12.70 mm |
| 18" | 457.2 mm | 9.52 mm | 12.70 mm |
| 20" | 508.0 mm | 9.52 mm | 12.70 mm |
| 24" | 609.6 mm | 9.52 mm | 12.70 mm |
Difference Between SCH 40S and SCH 80S Stainless Steel Welded Tubes
| Property | SCH 40S | SCH 80S |
|---|---|---|
| Wall Thickness | Standard | Heavy |
| Pressure Capacity | Medium Pressure | High Pressure |
| Weight | Lower | Higher |
| Strength | Moderate | Superior |
| Application Type | General Industrial Use | Heavy-Duty Industrial Use |
| Common Industries | Water treatment, food processing, pharma | Oil & gas, refinery, petrochemical |
Stainless Steel Welded Tubes Standards
| ASTM Standards | ASME Standards | ANSI Standards |
|---|---|---|
| ASTM A312 | ASME B36.19M | ANSI B36.19 |
| ASTM A358 | ASME SA312 | - |
| ASTM A790 | ASME SA790 | - |
| ASTM A409 | - | - |
Mechanical Properties of Stainless Steel Welded Tubes
Tensile Strength
Tensile strength indicates how much stress the tube can withstand before breaking. Stainless steel welded tubes provide reliable tensile performance, making them suitable for industrial, structural and process applications.
Yield Strength
Yield strength represents the point at which the tube begins to deform permanently under load. Good yield strength is important for welded stainless steel tubes used in pressure systems and fabrication applications.
Elongation
Elongation reflects the ductility and forming capability of stainless steel welded tubes. Higher elongation helps during bending, fabrication and installation processes.
| Grade | Tensile Strength (MPa, min) | Yield Strength (MPa, min) | Elongation (% min) |
|---|---|---|---|
| SS 304 | 515 | 205 | 40% |
| SS 304L | 485 | 170 | 40% |
| SS 316 | 515 | 205 | 40% |
| SS 316L | 485 | 170 | 40% |
| SS 321 | 515 | 205 | 40% |
| SS 904L | 490 | 220 | 35% |
Features of Stainless Steel Welded Tubes
- Excellent Corrosion Resistance: Stainless steel welded tubes offer excellent resistance against rust, chemicals and moisture, making them suitable for industrial and marine environments.
- High Temperature Performance: Welded stainless steel tubes can withstand elevated temperatures and demanding service conditions without losing structural stability.
- Superior Dimensional Accuracy: Stainless steel welded tubing provides accurate dimensions and uniform wall thickness for reliable installation and performance.
- Smooth Surface Finish: The smooth internal and external surface finish improves flow efficiency and enhances hygienic performance.
- Strong Weld Integrity: Modern welding technology ensures strong and durable weld seams for long-term industrial applications.
- Good Pressure Handling Capability: Stainless steel welded tubes are suitable for medium to high-pressure applications in industrial systems.
- Easy Fabrication: Welded stainless tubing supports bending, cutting, forming and welding for customized engineering applications.
- Cost-Effective Solution: Stainless steel welded tubes provide economical performance compared to seamless alternatives for many industrial applications.
- Long Service Life: Welded stainless steel tubes deliver long-lasting durability even in corrosive and demanding environments.
- Low Maintenance: Due to strong corrosion resistance and durable construction, stainless steel welded tubes require minimal maintenance.
Applications of Stainless Steel Welded Tubes
Stainless steel welded tubes are widely used in applications where corrosion resistance, dimensional accuracy and reliable performance are required.
Oil & Gas Industry
Used for fluid transportation and process systems in offshore and onshore operations.
Chemical Industry
Widely used for handling chemicals and corrosive fluids in industrial processing plants.
Heat Exchangers
Preferred for heat exchanger and condenser systems because of their smooth finish and corrosion resistance.
Pharmaceutical Industry
Ideal for hygienic and contamination-free pharmaceutical process piping systems.
Food Processing Industry
Used in food and beverage applications due to hygienic surfaces and easy cleaning properties.
Water Treatment Plants
Suitable for desalination and water purification systems requiring corrosion-resistant tubing.
Power Generation
Used in steam lines, boilers and thermal systems operating under demanding conditions.
Instrumentation Systems
Stainless steel welded tubing is widely used in instrumentation and hydraulic control systems.
Construction Industry
Used in structural, architectural and industrial construction applications.
Marine Industry
Marine environments require welded stainless steel tubes with excellent corrosion resistance and durability.
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.
Packaging, Testing & Inspection
Packaging
- Wooden Boxes: Stainless steel welded tubes are packed securely in wooden boxes to prevent transportation damage.
- Bundle Packing: Welded stainless steel tubes are bundled properly for safe storage and shipment handling.
- Plastic End Caps: Plastic caps protect tube ends from dust, moisture and external damage during transit.
- Export Standard Packaging: All stainless steel welded tubes are packed according to international export standards.
- Bubble Wrap Protection: Bubble wrapping provides additional protection for polished and finished tube surfaces.
Testing & Inspection
- Hydro Testing: Ensures stainless steel welded tubes can withstand internal pressure without leakage.
- Eddy Current Testing: Detects surface and internal defects in welded stainless tubing.
- PMI Testing: Positive Material Identification verifies chemical composition and material grade.
- Flattening Test: Evaluates tube flexibility and resistance to cracking during deformation.
- Flaring Test: Checks tube expansion and forming capability for fabrication applications.
- Visual Inspection: Confirms weld quality, dimensions and surface finish compliance.
- Third Party Inspection: Independent inspection agencies verify quality and testing compliance before dispatch.
Frequently Asked Questions
Kamal Steels is a leading stainless steel welded tube manufacturer in India, supplying high-quality welded stainless steel tubes for industrial and engineering applications.
A stainless steel welded tube is manufactured by forming stainless steel strips into a tubular shape and welding the seam using advanced welding processes.
We supply welded stainless steel tubes in grades such as 304, 304L, 316, 316L, 321, 347 and 904L.
Welded stainless tubing is used in heat exchangers, instrumentation systems, food processing, pharmaceutical and chemical industries.
Our stainless steel welded tubes are manufactured according to ASTM A249, ASTM A269, ASTM A554 and ASME standards.
We offer stainless steel welded tube sizes in various diameters, wall thicknesses and custom dimensions according to project requirements.
We perform hydro testing, eddy current testing, PMI testing and visual inspections to ensure quality and performance.
Yes, we supply welded round, square and rectangular stainless steel tubes for industrial and structural applications.
Seamless tubes are manufactured without welding, while welded tubes are produced using welded seams and offer excellent dimensional accuracy and economical performance.
You can request a quote by sharing your required grade, tube size, wall thickness, quantity and application details with our sales team.