Stainless Steel Tubes Manufacturer, Supplier & Stockist
Kalpaturu Piping Solutions is a manufacturer of stainless steel tubes that are designed to be versatile and durable and, as such, are applicable in a broad spectrum of industrial as well as structural applications. Our ASTM A269 SS Tubes will be offered in customisable sizes based on the specific project needs, with an ability to have specific outer diameters and wall thicknesses. These tubes are highly sought after in regard to the importance of accuracy and reliability.
Our stainless steel seamless tubes are characterised by high corrosion resistance, high strength, and low maintenance requirements, which contribute to keeping the total cost of operations at a low level. Regarding the usage, the clients have the option of different types of SS ERW tubing, such as hypodermic, square or metric tubing that is differentiated to fit the specific needs of industry.
Stainless steel tubes are mainly made of carbon and iron, and chromium is added in order to obtain corrosion resistance. Various grades of stainless steel are characterised in different ways. As an example, Grade 316 SS tubes are molybdenum enriched to offer greater corrosion resistance and high-temperature strength and are an ideal fit in a heat exchanger or in an automotive exhaust system.
Sizing is important, and the ASTM A213 tubes are applicable in structural use. Hypodermic SS welded tubes are used in specialised medical and industrial applications, and surface finishes such as polished stainless steel tubes are used to improve the appearance and resistance to corrosion.
Starting with SS capillary tubes to structural tubing, Kalpaturu Piping Solutions will guarantee dimensionally accurate products of high quality. Whenever you want to buy all your stainless steel tubing, always go to a reliable manufacturer who would ensure you have durability and performance.
Stainless Steel Tubes Material Grades
Specification of Stainless Steel Tubes
Type | Specification |
SS Seamless Tube | Outside Diameter: 1/8″ OD ~ 6″ OD Wall Thickness: 22 SWG ~ 10 SWG Max. Unit Length: Up to 11800 mm |
SS Welded Tube | Outside Diameter: 1/8″ OD ~ 6″ OD Wall Thickness: 22 SWG ~ 10 SWG Max. Unit Length: Up to 13000 mm |
SS Square Tubing | Wall Thickness: 1.0 – 2.5 mm (up to 4.0 mm on request) Edge Length: 12 – 51 mm (up to 142 mm on request) |
SS Rectangular Tubing | Wall Thickness: 0.5 – 2.5 mm (up to 4.0 mm on request) Edge Length: 5.9 x 4.4 mm – 60 x 44 mm (up to 142 mm on request) |
Form | Welded and Seamless |
Grades | 202 Stainless Steel Tube, 304 Stainless Steel Tube, 316 Stainless Steel Tube |
Type | Decorative, Food, Fluid, and Structural |
Length | Double Random, Single Random & Required Length |
Wall Thickness | 0.7 – 6.0 mm |
Spiral Welded | 76.2 mm OD – 1016 mm OD |
Round | 4.76 mm OD – 203.2 mm OD |
Rectangular | 12.7 x 25.4 mm – 200 x 100 mm |
Square | 12.7 – 150 A/F |
End | Beveled End, Plain End, Threaded |
Processing | Cut-to-length & Polishing |
Inspection / Test Reports | Destructive Test Report, EN 10204 3.1, Mill Test Certificates, Chemical Reports, Mechanical Reports, Visual Inspection Reports, NABL Approved Lab Reports, PMI Test Reports, Non Destructive Test Reports, Third Party Inspection Reports |
Delivery Condition | Bright Annealed, Polished, Annealed & Pickled, Cold Drawn |
Origin | European, Indian, US, Japanese, Thailand, Korean, Taiwanese Origin |
Outside Finish | No.4, 2B, No.8, No.1 Mirror Finish, Finish as per Customer Requirement |
Types of Stainless Steel Tube
ASTM A312 TP Stainless Steel Seamless Tube
10/20 Seamless Stainless Steel Tube
Cold Draw Mill Finish Seamless SS Large Diameter Thin Wall Tube
ERW Welded Polished SS Tube
High Precision Stainless Steel Tube
High Quality Seamless Square Tube SS
JIS Standard Grade Stainless Seamless Steel Tube
Korea Seah Seamless Colored Stainless Steel Tube
Mirror Welded Stainless Steel Tube
Sanitary ASTM A312 Stainless Steel Tube
Square SS Tube
SS 2 Inch Stainless Steel Tube
SS Large Diameter Stainless ERW Steel Tube
SS Mirror Polish Railing Round Tube
SS Mirror Polish Seamless Stainless Steel Tube
Stainless Steel Rectangular Tube
Stainless Steel Round Tube
Stainless Steel Triangle Tube
Stainless Steel Welded Tube
Thin Wall Large Diameter SS Tube
Welded SS Tube
SS Seamless Tube Size Chart
OD (mm) | OD (inch) | BWG 22 (kg/m) | BWG 12 (kg/m) | BWG 25 (kg/m) | BWG 20 (kg/m) | BWG 16 (kg/m) | BWG 18 (kg/m) | BWG 14 (kg/m) | BWG 10 (kg/m) |
6.35 | 1/4 | 0.109 | – | 0.081 | 0.133 | 0.212 | 0.174 | – | – |
9.53 | 3/8 | 0.157 | – | 0.126 | 0.193 | 0.356 | 0.257 | 0.429 | – |
12.7 | 1/2 | 0.214 | 0.754 | – | 0.263 | 0.457 | 0.356 | 0.612 | – |
15.88 | 5/8 | 0.271 | 0.995 | – | 0.334 | 0.588 | 0.455 | 0.796 | – |
19.05 | 3/4 | 0.327 | 1.236 | – | 0.405 | 0.729 | 0.553 | 0.895 | – |
25.4 | 1 | 0.44 | 1.574 | – | 0.546 | 0.981 | 0.75 | 1.234 | 2.05 |
31.75 | 1 1/4 | 0.554 | 2.014 | – | 0.688 | 1.244 | 0.947 | 1.574 | 2.641 |
38.1 | 1 1/2 | 0.667 | 2.454 | – | 0.832 | 1.514 | 1.144 | 1.904 | 3.233 |
44.5 | 1 3/4 | – | 2.894 | – | 1.774 | 1.342 | 2.244 | 3.5 | – |
50.8 | 2 | – | 3.334 | – | 2.034 | 1.549 | 2.574 | 4.03 | – |
63.5 | 2 1/2 | – | 4.214 | – | 2.554 | 1.949 | 3.244 | 5.13 | – |
76.2 | 3 | – | 5.094 | – | 3.084 | 2.345 | 3.914 | 6.19 | – |
88.9 | 3 1/2 | – | 5.974 | – | 3.609 | 2.729 | 4.584 | 7.27 | – |
101.6 | 4 | – | 6.854 | – | 4.134 | – | 5.254 | 8.35 | – |
114.3 | 4 1/2 | – | 7.734 | – | 4.654 | – | 5.924 | 9.43 | – |
ASTM A213 Tube Stock List
Product Description | Wall Thickness (mm) | Outside Diameter (mm) |
SS Square Tube | 0.5 – 30 | 12.7 × 12.7 – 300 × 300 |
SS Seamless Tube | 0.8 – 30 | 6 – 430 |
SS Round Tube | 0.5 – 30 | 6 – 630 |
SS Colour Coated Tube | 0.5 – 30 | 6 – 630 |
SS Rectangular Tube | 0.5 – 30 | 10 × 20 – 100 × 200 |
SS Triangle Tube | 0.5 – 3.0 | 16 – 85 |
SS Electropolished Tube | 0.5 – 30 | 12.7 – 250 |
SS U Shaped Tube | 0.5 – 2.0 | 20 – 200 |
SS Hexagonal Tube | 0.5 – 2.0 | 13 – 85 |
Inner/Outside Polished SS Tube | 1.0 – 5 | 12.5 – 203.2 |
Thin Wall SS Tube | 0.5 – 2.0 | 22 × 0.7 – 108 × 2.0 |
SS Capillary Tube | 0.08 – 1.2 | 0.28 – 10 |
Stainless Steel Tube Tolerance Chart
| Specification | Size OD Range (inches) | O.D. Tolerance Minus | O.D. Tolerance Plus | Wall Tolerance Minus | Wall Tolerance Plus |
| Welded & Seamless | 0.094 – 0.187 | 0.000″ | 0.003″ | 10% | 10% |
| ASTM-A-632 | Under 0.094 | 0.000″ | 0.002″ | 10% | 10% |
| ASTM-A-269 | Under 0.500 | 0.005″ | 0.005″ | 15% | 15% |
| Cold Finished | 0.188 – 0.500 | 0.000″ | 0.004″ | 10% | 10% |
| Hot Finished | 5.500 – 8.000 | 0.030″ | 0.030″ | 10% | 10% |
| General Service | 1.500 – 3.499 | 0.010″ | 0.010″ | 10% | 10% |
| Welded & Seamless | 0.500 – 1.499 | 0.005″ | 0.005″ | 10% | 10% |
| Cold Finished | 3.500 – 5.499 | 0.015″ | 0.015″ | 10% | 10% |
Heat Exchanger Tube Tolerance Chart
Specification | Size OD Range (inches) | O.D. Tolerance Plus | O.D. Tolerance Minus | Wall Tolerance Plus | Wall Tolerance Minus |
ASME-SA-249 | 1.000 – 1.500 | 0.006″ | 0.006″ | 10% | 10% |
ASTM-A-249 | Under 1.000 | 0.004″ | 0.004″ | 10% | 10% |
Heat Exchanger Tube | 2.000 – 2.499 | 0.010″ | 0.010″ | 10% | 10% |
Welded & Cold Worked | 1.501 – 1.999 | 0.008″ | 0.008″ | 10% | 10% |
Heat Exchanger Tube (Note 1) | 3.000 – 4.000 | 0.015″ | 0.015″ | 10% | 10% |
Average Wall | 2.500 – 2.999 | 0.012″ | 0.012″ | 10% | 10% |
4.001 – 5.000 | 0.015″ | 0.025″ | 10% | 10% | |
ASME-SA-213 (Note 2 & 3) | 1.000 – 1.500 | 0.006″ | 0.005″ | 20% | 0% |
3.000 – 4.000 | 0.015″ | 0.015″ | 22% | 0% | |
ASTM-A-213 | Under 1.000 | 0.004″ | 0.004″ | 20% | 0% |
Heat Exchanger Tube | 2.000 – 2.499 | 0.010″ | 0.010″ | 22% | 0% |
Cold Finished Seamless | 1.501 – 1.999 | 0.008″ | 0.008″ | 22% | 0% |
Minimum Wall | 2.500 – 2.999 | 0.012″ | 0.012″ | 22% | 0% |
4.001 – 5.000 | 0.015″ | 0.025″ | 22% | 0% |
Mechanical Hollow Bar Tolerance Chart
| Specification | Size OD Range (inches) | O.D. Tolerance | Wall Tolerance ± 0.250–0.125 in | Wall Tolerance ± ≥0.250 in |
| Seamless Hollow Bar | 3.000 – 5.499 | ±0.031″ | ±12.5% | ±15.0% |
| AMS 5639 / AMS 5648 | 1.500 – 3.499 | ±0.010″ | ±10.0% | ±12.5% |
| Hot Finished | 5.500 – 8.000 | ±0.047″ | ±12.5% | ±15.0% |
| Cold Finished | 5.500 – 8.000 | ±0.031″ | ±10.0% | ±12.5% |
| Seamless Hollow Bar | 3.500 – 5.499 | ±0.015″ | ±10.0% | ±12.5% |
| ASTM-A-511 | 1.125 – 2.999 | ±0.023″ | ±12.5% | ±15.0% |
Stainless Steel Tube Bend Radius Chart
| Material | Tubing Outside Diameter (OD) | Radius 1 | Radius 2 |
| SS | 38 mm, 1.5″, 1 ½” | 57.15 mm, 2.25″, 2 ¼” | – |
| SS and Copper | 9.52 mm, 0.375″, ⅜” | 23.8 mm, 0.9375″, 15/16″ | – |
| SS | 6.35 mm, 0.25″, ¼” | 12.7 mm, 0.5″, ½” | 14.28 mm, 0.5625″, 9/16″ |
| SS and Inconel | 31.75 mm, 1.25″, 1 ¼” | 50.8 mm, 2″, 2″ | – |
| SS and Aluminum | 19 mm, 0.75″, ¾” | 28.5 mm, 1.125″, 1-1/8″ | – |
| SS | 12.7 mm, 0.5″, ½” | 12.7 mm, 0.5″, ½” | 38 mm, 1.5″, 1 ½” |
| SS and Aluminum | 25.4 mm, 1″, 1″ | 38 mm, 1.5″, 1 ½” | – |
Wall Thickness vs OD Weight Chart
| O.D. (mm) | 0.5 mm (kg/m) | 0.6 mm | 0.7 mm | 0.8 mm | 1.0 mm | 1.2 mm | 1.6 mm | 2.0 mm | 2.6 mm | 3.0 mm | 3.6 mm | 3.2 mm |
| 6.0 | 0.069 | 0.081 | 0.093 | 0.104 | 0.125 | 0.144 | 0.176 | – | – | – | – | – |
| 10.0 | 0.119 | 0.141 | 0.163 | 0.184 | 0.225 | 0.264 | 0.336 | – | – | – | – | – |
| 12.7 | 0.153 | 0.182 | 0.210 | 0.238 | 0.293 | 0.345 | 0.444 | – | – | – | – | – |
| 14.0 | 0.169 | 0.201 | 0.233 | 0.264 | 0.325 | 0.384 | 0.496 | – | – | – | – | – |
| 15.87 | 0.192 | 0.229 | 0.266 | 0.301 | 0.372 | 0.440 | 0.571 | – | 0.694 | – | – | – |
| 19.0 | 0.231 | 0.276 | 0.320 | 0.364 | 0.450 | 0.534 | 0.696 | 0.850 | 1.066 | 1.200 | – | 1.264 |
| 25.0 | 0.306 | 0.366 | 0.425 | 0.484 | 0.600 | 0.714 | 0.936 | 1.150 | 1.456 | 1.650 | 1.926 | 1.744 |
| 25.4 | 0.311 | 0.372 | 0.432 | 0.492 | 0.610 | 0.726 | 0.952 | 1.170 | 1.482 | 1.680 | 1.962 | 1.776 |
| 31.75 | – | – | – | – | 1.208 | 0.918 | 1.490 | 1.898 | 2.160 | 2.538 | – | 2.288 |
| 38.0 | – | – | – | – | 1.456 | 1.104 | 1.800 | 2.301 | 2.625 | 3.096 | – | 2.784 |
| 44.5 | – | – | – | – | 1.716 | 1.299 | 2.125 | 2.724 | 3.113 | 3.681 | – | 3.304 |
| 50.8 | – | – | – | – | 1.968 | – | 2.440 | 3.133 | 3.585 | 4.248 | – | 3.808 |
| 63.5 | – | – | – | – | 2.476 | – | 3.075 | 3.959 | 4.538 | 5.391 | – | 4.824 |
| 76.1 | – | – | – | – | 2.980 | – | 3.705 | 4.778 | 5.483 | 6.525 | – | 5.832 |
| 101.6 | – | – | – | – | 4.000 | – | 4.980 | 6.435 | 7.395 | 8.820 | – | 7.872 |
| 114.3 | – | – | – | – | 4.453 | – | 5.547 | 7.173 | 8.247 | 9.840 | – | 8.780 |
| 127.0 | – | – | – | – | 4.955 | – | 6.175 | 7.989 | 9.188 | 10.980 | – | 9.785 |
| 152.4 | – | – | – | – | 5.960 | – | 7.429 | 9.620 | 11.070 | 13.231 | – | 11.792 |
Stainless Steel Tube Applications & Uses
- Structural Applications
- Industrial Applications
- Automotive and Transportation
- Medical and Precision Equipment
- Decorative and Architectural Applications
- Heat Exchanger and Power Plants
- Mechanical Hollow Bar Applications
FAQs About Stainless Steel Tubes
Stainless steel tubes are hollow pipes made from chromium-alloyed steel, offering strength, corrosion resistance, and durability. They are used in structural, industrial, automotive, and decorative applications.
The four main types are Austenitic (high corrosion resistance, non-magnetic), Ferritic (magnetic, moderate corrosion resistance), Martensitic (strong, heat-treatable), and Duplex (high strength and corrosion resistance).
Yes, all tubes including square, rectangular, round, and capillary tubes can be customized as per project requirements.
Bend radius varies by OD and material. For example, a 38mm SS tube has a bend radius of 57.15mm (2.25”) and smaller tubes like 6.35mm (¼”) have a radius of 12.7mm (½”).