Stainless Steel Tubing Sizes Chart
| TUBE O.D (INCH) | TUBE O.D (MM) | WALL THICKNESS (INCH) | WALL THICKNESS (MM) | BWG |
|---|---|---|---|---|
| 0.188 | 4.78 | 0.035 | 0.89 | 20 |
| 0.250 | 6.35 | 0.020 | 0.51 | |
| 0.028 | 0.71 | 22 | ||
| 0.035 | 0.89 | 20 | ||
| 0.049 | 1.25 | 18 | ||
| 0.065 | 1.65 | 16 | ||
| 0.313 | 7.95 | 0.035 | 0.89 | 20 |
| 0.049 | 1.25 | 18 | ||
| 0.375 | 9.53 | 0.028 | 0.71 | 22 |
| 0.035 | 0.89 | 20 | ||
| 0.049 | 1.25 | 18 | ||
| 0.065 | 1.65 | 16 | ||
| 0.500 | 12.7 | 0.035 | 0.89 | 20 |
| 0.049 | 1.25 | 18 | ||
| 0.650 | 1.65 | 16 | ||
| 0.625 | 15.88 | 0.035 | 0.89 | 20 |
| 0.049 | 1.25 | 18 | ||
| 0.065 | 1.65 | 16 | ||
| 0.750 | 19.05 | 0.035 | 0.89 | 20 |
| 0.049 | 1.25 | 18 | ||
| 0.065 | 1.65 | 16 | ||
| 0.083 | 2.11 | 14 | ||
| 0.120 | 3.05 | 11 | ||
| 0.875 | 22.23 | 0.035 | 0.89 | 20 |
| 0.049 | 1.25 | 18 | ||
| 0.065 | 1.65 | 16 | ||
| 0.120 | 3.05 | 11 | ||
| 1.000 | 25.4 | 0.035 | 0.89 | 20 |
| 0.049 | 1.25 | 18 | ||
| 0.065 | 1.65 | 16 | ||
| 0.083 | 2.11 | 14 | ||
| 0.095 | 2.41 | 13 | ||
| 0.120 | 3.05 | 11 | ||
| 1.125 | 28.58 | 0.065 | 1.65 | 16 |
| 1.250 | 31.75 | 0.065 | 1.65 | 16 |
| 0.083 | 2.11 | 14 | ||
| 0.120 | 3.05 | 11 | ||
| 1.375 | 34.93 | 0.035 | 0.89 | 20 |
| 1.5000 | 38.1 | 0.049 | 1.25 | 18 |
| 0.065 | 1.65 | 16 | ||
| 0.083 | 2.11 | 14 | ||
| 0.120 | 3.05 | 11 | ||
| 1.750 | 44.45 | 0.035 | 0.89 | 20 |
| 0.065 | 1.65 | 16 | ||
| 0.083 | 2.11 | 14 | ||
| 1.875 | 47.63 | 0.065 | 1.65 | 16 |
| 2.000 | 50.8 | 0.049 | 1.25 | 18 |
| 0.065 | 1.65 | 16 | ||
| 0.083 | 2.11 | 14 | ||
| 0.120 | 3.05 | 11 | ||
| 2.125 | 53.98 | 0.065 | 1.65 | 16 |
| 2.250 | 57.15 | 0.065 | 1.65 | 16 |
| 0.083 | 2.11 | 14 | ||
| 0.120 | 3.05 | 11 | ||
| 2.500 | 63.5 | 0.065 | 1.65 | 16 |
| 0.083 | 2.11 | 14 | ||
| 0.120 | 3.05 | 11 | ||
| 2.750 | 69.85 | 0.065 | 1.65 | 16 |
| 3.000 | 76.2 | 0.049 | 1.25 | 18 |
| 0.065 | 1.65 | 16 | ||
| 0.083 | 2.11 | 14 | ||
| 0.120 | 3.05 | 11 | ||
| 3.250 | 82.55 | 0.065 | 1.65 | 16 |
| 0.120 | 3.05 | 11 | ||
| 3.500 | 88.9 | 0.065 | 1.65 | 16 |
| 4.000 | 101.6 | 0.065 | 1.65 | 16 |
| 0.083 | 2.11 | 14 | ||
| 4.250 | 108 | 0.120 | 3.05 | 11 |
| 4.500 | 114.3 | 0.065 | 1.65 | 16 |
| 5.000 | 127 | 0.065 | 1.65 | 16 |
| 0.083 | 2.11 | 14 | ||
| 0.120 | 3.05 | 11 | ||
| 0.188 | 4.78 | |||
| 6.000 | 152.4 | 0.065 | 1.65 | 16 |
| 0.083 | 2.11 | 14 | ||
| 0.120 | 3.05 | 11 | ||
| 8.000 | 203.2 | 0.120 | 3.05 | 11 |
Our mills produce seamless and welded tube covering stainless steel 304, 304L, and 316L. We also offer fabricating, cutting, bending, and polishing services to meet various requirements, forms and shapes including round tube, rectangular tubing, square tubing, oval tubing, U bend tubing, and tubing coil.
Stainless steel tube is typically specified by OD (outside diameter), WT (wall thickness), grade, condition and surface finish. It is resistant to many forms of corrosion, has hygienic sterile properties, high-quality aesthetic appeal and exceptional strength. Tube is manufactured in round, square and rectangular sections in a variety of wall thicknesses and usually by the processes of longitudinal welding, hot and cold drawing
Finishes or appearances range from unpolished to highly polished. Unpolished has a 2B mill finish, standard polished is a finely grit polished finish and there is a finer buffed finish giving close to a mirror appearance. Finishes are selected to suit the application and aesthetic appeal.
Stainless Steel Tube Specifications
- A213 – Seamless Stainless Steel Boiler, Superheater, and Heat-Exchanger Tubes
- A249 – Welded Stainless Steel Boiler, Superheater, Heat Exchanger, and Condenser Tubes
- A268 – Seamless and Welded Stainless Steel Tubing for General Service
- A269 – Seamless and Welded Austenitic Stainless Steel Tubing for General Service
- A270 – Seamless and Welded Stainless Steel Sanitary Tubing
- A688 – Welded Austenitic Stainless Steel Feedwater Heater Tubes
- A789 – Seamless and Welded Stainless Steel Tubing for General Service
Grades of Stainless Steel Tube
- Austenitic: 304, 304L, 316, 316L, 316H, 316Ti, 317/317L, 347/347H, 321/321H, 310/S, 904L, 254SMO
- Ferritic: 409, 430, 439, 441, 434, 436, 444, 446
- Martensitic: 403, 410, 410S, 414/L, 418, 420, 440, 416
- Duplex: 2205, S31803, S32750, S32760
As-Welded Tube
Decorative & Structural Tube – This tubing is produced directly off the continuous tube welding mill, using cold rolled stainless steel strips made to ASTM standards, with tubes produced to commercial limits of straightness in standard or specific customer lengths.
AW tube has a higher yield point than annealed tube and is generally used for structural and decorative applications in mildly corrosive conditions. It is not suitable for applications requiring significant flaring, expanding, or bending, nor for pressure applications. AW tube is also available with rebate slots to support architectural glass panels.
Manufacturing specification: ASTM A554.
Food Quality Tube – As-welded food quality tube is produced by Dongsahng Stainless. This tube at the point of manufacture goes through a process where the internal weld bead is rolled. The result is an improved internal finish along the weld, reducing the chance of a crevice where liquid or food products may be trapped. This assists with the ‘clean in place’ (CIP) environment in food and beverage process lines or other applications such as the pharmaceutical industry. Further assurance of the reliability of the food tube comes from the 100% weld NDT mandatory for this product.
Manufacturing specification: ASTM A270, EN 10357
Welded Annealed Tube
This tube is produced by the same process as the AW tube but is annealed to relieve stresses and improve ductility. Bright annealing is carried out in a controlled atmosphere furnace so that no oxide or scale is formed on the surface.
Annealing both increases the corrosion resistance and softens the tube, allowing severe manipulation such as bending, expanding and forming.
Manufacturing specification: ASTM A269
Cold Worked Annealed Tube
This tube is typically destined for heat exchanger applications and is produced in a similar way to AWA products except that the internal bead is rolled flush with the inside tube surface before annealing. Because of the critical end use this tube undergoes extensive testing as part of the manufacturing process.
Manufacturing specification: ASTM A249
Cold Drawn Seamless Tube
This tube is produced by drawing from hollow billets. It is usually supplied in the annealed and pickled condition and used where service conditions involve high pressure and corrosive conditions and where good surface finish and close tolerances are required, e.g. heat exchanger and condenser tubing, instrumentation tubing and some refinery applications.
Manufacturing specification: ASTM A269 for general service. ASTM A213M for heat exchanger service and A268 for Ferritic and Martensitic tubes.
Stainless Steel Tube Manufacturer
We offer stainless steel tube and pipe that conform to ASTM and international standard, such as GB, DIN, JIS, GOST, from raw material to final product, and producing process comply with ISO9001:2008 quality system, standard or optional testing and inspection should be conducted to ensure quality products, applying in corrosion and high-temperature environments.
Tube is usually annealed if extensive forming and bending is required, such as for bending or expanding. The tubular products system incorporates a comprehensive range of stainless steel fittings in the form of elbows, tees, reducers and flanges in various sizes, wall thickness, grades and finishes to suit tube dimensions and tolerances.