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Table of Content
- Most Common Types of SS Seamless Tubing
- SS Seamless Tubing Specifications
- SS Seamless Tubing Dimensions Chart
- SS Seamless Tubing Thickness Chart
- SS Seamless Tubing Packing & Marking
- Why Choose Neeka Tubes for Stainless Steel Seamless Tubing
- Stainless Steel Seamless Tubing Applications Across Industries
- FAQ
Neeka Tubes is a reliable Stainless Steel Seamless Tubing manufacturer and supplier, delivering high-quality products to clients worldwide. Our SS seamless Tube is built for demanding uses—whether in high-pressure systems, sanitary pipelines, or corrosive environments. Manufactured through rotary piercing, cold drawing, and extrusion, each tube is smooth, weld-free, and built to perform under stress. We follow strict international standards, including ASTM A213 for heat exchanger and boiler tubes, ASTM A269 for general-purpose service, and ASTM A511 for mechanical applications.
We offer a wide range of grades such as Stainless Steel 304 Seamless Tube , Stainless Steel 310 Seamless Tube, Stainless Steel 316 Seamless Tube, and Stainless Steel 321 Seamless Tube to meet diverse industry needs and offer good intergranular corrosion protection. We ensure that every product meets performance requirements by maintaining reliable stock, providing quick delivery and implementing tight quality control measures. Our ASTM A213 / A269 seamless tubes are known for their clean finishes, strict tolerances, and long service life in critical industries.
Stainless Steel Seamless Tubes, Seamless Stainless Steel Tubes, Stainless Steel Seamless Tube Suppliers, Seamless SS Tube, Seamless Stainless Steel Tube Manufacturers, Seamless Stainless Steel Tube Sizes, Seamless SS Tubing
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Key Features of SS Seamless Tubing
- High Pressure Resistance
It can withstand severe pressure without breaking, making it ideal for hydraulic systems, heat exchangers, and boiler tubes in the power and oil & gas industries. - Superior Corrosion Resistance
Resists acids, chlorides, and seawater and is widely used in chemical processing, marine structures, and offshore platforms. - Leak-Free Performance
No welded seams mean no weak areas, providing dependable, long-term performance in pharmaceutical and food-grade fluid systems. - Tight Dimensional Tolerance
Tight dimensional control (±0.1 mm or better) supports automated assembly and smooth integration into industrial piping. - Smooth Surface Finish (BA/Annealed)
The polished inside surface reduces friction and allows for easy cleaning, making it ideal for biotech, dairy, and CIP systems. - High Melting Point & Density
Withstands up to 1450°C and has a density of 7.9 g/cm³ used in high-temperature lines and thermal plants. - Excellent Mechanical Strength
Durable under stress, bending, and vibration, trusted in structural, aerospace, and industrial process equipment. - Long Service Life in Harsh Environments
Built to last in corrosive, high-pressure, and high-temperature setups common in refineries, petrochemical units, and marine vessels.
Seamless vs Welded Stainless Steel Tubing – Key Differences
When picking between seamless and welded stainless steel tubing, consider your pressure needs, application type, and long-term performance expectations.
No Welds, Better for High-Pressure Use
The difference between seamless and welded tubing is the absence of welds in seamless tubes. Seamless SS tubing is made from solid steel, making it the preferred choice for high-pressure systems, boilers and heat exchangers where strength is critical.
More Affordable for General Applications
Welded tubing is usually less expensive and easier to fabricate. If you work with low-pressure lines, furniture, or architectural structures, it’s an ideal choice. Stainless Steel Welded Tubing delivers solid performance without breaking your budget.
Better Strength and Internal Uniformity
Since seamless tubing is extruded from a single piece of metal, it has a stronger internal grain structure and no weak places. That’s why seamless SS tubing for heat exchangers and critical piping systems is preferred.
Smoother Finish with Welded Tubes
Due to its manufacturing method, welded tubing often has a more consistent and polished surface. Stainless Steel 304 Welded Tubing is ideal for visible installations, structural elements, or decorative purposes.
Trusted in Tough Environments
For refineries, offshore rigs, or chemical plants, seamless tubes shine. Their ability to handle heat, pressure, and corrosion makes them a solid fit in demanding areas, especially where reliability is non-negotiable.
Perfect for Everyday Structural Use
Welded tubes, on the other hand, are commonly utilized in residential railings, interior designs, and frameworks that are not subjected to high chemical or thermal stress levels. It’s the go-to for general fabrication and low-risk environments.
Higher Cost, But Lower Long-Term Risk
Seamless tubes cost more upfront due to complex production. However, in the long run, they help reduce failures, maintenance, and system downtime, particularly in aggressive or mission-critical setups.
Most Common Types of Stainless Steel Seamless Tubing
SS Seamless Tube
SS Seamless Round Tube
SS Seamless square Tube
SS Seamless Rectangular Tube
SS Seamless Steel Coil Tube
Stainless Steel Capillary Seamless Tube
Stainless Steel Seamless Polished Tube
Stainless Steel Cold Drawn Seamless Tube
Stainless Steel Seamless Tubing Specifications
| Tube Range | 1/2″ OD – 12″ OD, Guage: 25 SWG – 10 SWG |
| Outer Diameter | 3.00 mm – 219.10 mm |
| Wall Thickness | 0.40 mm – 12.70 mm |
| Schedules | 5, 10S, 10, 30, 40S, 40, 80, 80S, XS, 160, XXH |
| Length | Upto 30 meters, Custom Cut Lengths |
| Specifications | ASTM A213 / ASTM SA213 |
| Types | Round, Square, Rectangle, Coil, “U” Shape, Hydraulic & Honed Tubes |
Looking For Fastest Delivery of Stainless Steel Tubing in Mumbai? Find Your Sizes and Thickness of SS Seamless Tube in Our Ready Stock.
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Stainless Steel Seamless Tubing Dimensions
| Nominal Bore Chart | Outside Diameter (O.D) | Schedule 5S | Schedule 10S | Schedule 40S | Schedule 80S | Schedule 160S | Schedule XXS | ||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Wt mm | Weight (Kg./mt) | Wt mm | Weight (Kg./mt) | Wt mm | Weight (Kg./mt) | Wt mm | Weight (Kg./mt) | Wt mm | Weight (Kg./mt) | Wt mm | Weight (Kg./mt) | ||
| 3 | 10.3 | 1.24 | 0.276 | 1.24 | 0.28 | 1.73 | 0.37 | 2.41 | 0.47 | – | – | – | – |
| 6 | 13.7 | 1.24 | 0.390 | 1.65 | 0.49 | 2.24 | 0.631 | 3.02 | 0.80 | – | – | – | – |
| 10 | 17.1 | 1.24 | 0.490 | 1.65 | 0.63 | 2.31 | 0.845 | 3.20 | 1.10 | – | – | – | – |
| 15 | 21.3 | 1.65 | 0.800 | 2.11 | 1.00 | 2.77 | 1.27 | 3.75 | 1.62 | 4.75 | 1.94 | 7.47 | 2.55 |
| 20 | 26.7 | 1.65 | 1.03 | 2.11 | 1.28 | 2.87 | 1.68 | 3.91 | 2.20 | 5.54 | 2.89 | 7.82 | 3.63 |
| 25 | 33.4 | 1.65 | 1.30 | 2.77 | 2.09 | 3.38 | 2.50 | 4.55 | 3.24 | 6.35 | 4.24 | 9.09 | 5.45 |
| 40 | 48.3 | 1.65 | 1.91 | 2.77 | 3.11 | 3.68 | 4.05 | 5.08 | 5.41 | 7.14 | 7.25 | 10.16 | 9.54 |
| 50 | 60.3 | 1.65 | 2.40 | 2.77 | 3.93 | 3.91 | 5.44 | 5.54 | 7.48 | 8.74 | 11.1 | 11.07 | 13.44 |
| 100 | 114.3 | 2.11 | 5.84 | 3.05 | 8.36 | 6.02 | 16.07 | 8.56 | 22.3 | 13.49 | 33.54 | 17.12 | 41.03 |
| 200 | 219.1 | 2.77 | 14.79 | 3.76 | 19.96 | 8.18 | 42.6 | 12.7 | 64.6 | 23.0 | 111.2 | 22.23 | 107.8 |
| 300 | 323.9 | 3.96 | 31.36 | 4.57 | 36.07 | 12.70 | 97.5 | 17.48 | 131.0 | 30.23 | 238.76 | 35.56 | 282.79 |
| 600 | 609.6 | 5.54 | 82.47 | 6.35 | 94.45 | 17.48 | 255.41 | 30.96 | 442.08 | 59.54 | 808.22 | – | – |
Thickness Chart of SS Seamless Tubing
| Sizes | SCH 10 304 Grade Stainless Steel Pipe | O.D | |
| DIA | |||
| Inch | DN | Thickness | Millimetre (mm) |
| 1 Inch | DN 25 | 2.77 | 33.4 |
| 2 Inch | DN 50 | 2.77 | 60.3 |
| 3 Inch | DN 80 | 3.05 | 88.9 |
| 4 Inch | DN 100 | 3.05 | 114.3 |
| 5 Inch | DN 125 | 3.43 | 141.3 |
| 6 Inch | DN 150 | 3.43 | 168.3 |
| 8 Inch | DN 200 | 3.76 | 219.1 |
| 10 Inch | DN 250 | 4.19 | 273.1 |
| 11/2 Inch | DN 40 | 2.77 | 48.3 |
| 11/4 Inch | DN 32 | 2.77 | 24.2 |
| 12 Inch | DN 300 | 4.57 | 323.9 |
| 14 Inch | DN 350 | 6.35 | 355.6 |
| 16 Inch | DN 400 | 6.35 | 406.4 |
| 18 Inch | DN 450 | 6.35 | 457.2 |
| 21/2 Inch | DN 65 | 3.05 | 73 |
| 22 Inch | DN 550 | 6.35 | 558.8 |
| 24 Inch | DN 600 | 6.35 | 609.6 |
| 34 Inch | DN 850 | 7.92 | 863.6 |
| 31/2 Inch | DN 90 | 3.05 | 101.6 |
| 36 Inch | DN 900 | 7.92 | 914.4 |
Packing & Marking
We use secure export packaging for SS seamless tubes to protect every order during shipping. Each tube is capped, wrapped in plastic or bubble wrap, and packed into strong, fumigated wooden boxes. We ensure clear, seamless stainless steel tube marking for traceability. Every tube is marked with size, grade, heat number and country of origin. Custom markings are available on request. This careful packing and marking process helps avoid damage, mix-ups, or delays so you get exactly what you ordered, in perfect condition.
Quality Tests & Certifications
We conduct strict quality checks to ensure that every Stainless Steel Seamless Tubing meets industry standards. Testing includes hydrostatic testing to check pressure resistance, eddy current testing for surface defect detection, ultrasonic testing for internal flaw detection and chemical & mechanical testing to confirm material properties. All tubes are supplied with Mill Test Certificates (MTC), EN 10204 3.1 & 3.2 certifications to guarantee quality and traceability.
Why Choose Neeka Tubes for Stainless Steel Seamless Tubing
Neeka Tubes is a reputable SS seamless tube supplier in India, known for providing precision-engineered tubing with consistent quality, quick lead times, and customized service. Whether you require standard sizes or unique solutions, we have you covered.
- Built to global standards: All stainless steel seamless tubing meets ASTM A213, A269, and A511 ready for international use.
- ISO 9001:2015 certified manufacturing: Each tube is manufactured under strict quality control procedures to assure performance, dependability and consistency.
- Custom specs available: Choose your size, wall thickness, and surface finish. We tailor tubing to match exact application needs.
- Large ready stock for fast delivery: As a leading stainless steel tube stockist, we carry a wide range of dimensions for urgent and bulk orders.
- Export-ready with full support: Get secure packaging, proper marking, and thorough documentation to ensure a seamless global transport.
- Technical support: Our technical team offers clear, honest advice to guide you on grades, specs, and best-fit solutions.
Searching for ready stock of Stainless Steel Seamless Tubing in Mumbai?
Stainless Steel Seamless Tubing Applications Across Industries
Stainless Steel Seamless Tubing is used in industries that require durability, pressure resistance, and corrosion prevention.
- Heat Exchangers: SS seamless tubing for heat exchangers helps transport heat efficiently while not breaking down in corrosive or high-temperature settings. Smooth inner walls improve flow and reduce fouling.
- Pharmaceutical & Biotech: Pharmaceutical SS tubing is used in sterile fluid transport systems where cleanliness is critical. The tubing resists contamination and supports clean-in-place operations.
- Oil & Gas Refineries: SS tube for oil & gas built to handle extreme pressure and chemical exposure in refineries, pipelines, and drilling units. Stays leak-proof even in harsh zones.
- Chemical Processing Plants: Seamless tube for a chemical plant withstands acidic and reactive compounds while maintaining structural integrity. Ideal for the transport of aggressive media.
- Marine & Offshore: Marine-grade SS seamless tubing is perfect for sea-exposed structures. It resists saltwater corrosion, and holds up under stress in offshore rigs and ship systems.
- Power Generation & Boilers: High-temperature stainless steel tubing works in boilers, steam lines and condensers. Tubing stands up to thermal cycling, and internal pressure without cracking.
- Food & Beverage Processing: Stainless steel CIP tubing is used in pipelines that require frequent cleaning. Supports hygienic transport of liquids in dairy, beverage, and food plants.
FAQ
What standards do your seamless stainless tubes meet?
They typically meet ASTM A213, A269, A312, and equivalent international standards.
What grades of stainless seamless tubing are commonly available?
 Common grades include 304, 304L, 316, 316L, and other special alloys on request.
What size range is available for stainless steel seamless tubing?
 Sizes usually range from 1/8″ OD to 12″ OD with varying wall thicknesses.
Are these tubes suitable for high-pressure or high-temperature applications?
 Yes, seamless tubes are ideal for both high-pressure and high-temperature conditions.
Is stainless steel seamless tubing leak-proof?
  Yes, due to the absence of welds, seamless tubes offer excellent leak resistance.
Does temperature affect service life?
  Yes, prolonged exposure to extreme temperatures can impact material longevity, though stainless steel performs well in harsh environments.
Are test certificates provided with seamless tubing orders?
 Yes, Mill Test Certificates (MTC) or third-party inspection reports are provided upon request.