We produce all standard sanitary tubing to meet ASTM A270 polished designation, welded tube sizes range from ½ to 8 inches in outside diameter (12.7 – 203.2 millimeter OD) in 20 foot (6.1 meter) lengths, 304/304L and 316/316L stainless steel are common grades for sanitary tubing, surface finish of tubing can be specified in a number of ways to a number of different finishes, polish tubing meets or exceeds the ASTM A270 standard with an ID polish of a 20 Ra on the Inside of the Tube and a 150 Grit or 32 Ra on the Outside of the tube.
Sanitary Tubing Dimensions and Sizes, Polished Stainless Steel Sanitary Tubing, Welded Steel Sanitary Tubing, ASTM A270/SA270 Sanitary Tubing
Mechanically polished on welded tube both inside surface and outside surface (20Ra I.D., 32Ra O.D.), also available with 15Ra EP I.D., 32Ra O.D. finish, the surface finish of tubing measured per ASME/ANSI B46.1. High-purity tubing is also available which can include cleaning for gas/oxygen service, thermocouple cleaning or nitric acid cleaning with a deionized water rinse.
| Standard | ASTM A270, 3A, DIN EN 10357 |
|---|---|
| Roughness | 0.2 – 1.6 mm |
| Grades | 304, 316L |
| Surface | Polishing finish |
| Polishing Grit | 180, 240, 320, 400, 600 Grit |
| Outside Diameter | 12.7 – 304 mm |
| Thickness | 0.5 – 8 mm |
| Length | 6 m or on request |
Stainless Steel Sanitary Tubing
Stainless steel is a popular material choice for Sanitary Tubing applications, stainless steel has a protective oxide layer that can protect against the formation of rust in harsh temperatures, and the surfaces of Sanitary Tubing must be free of lines, grooves, pits, or divots.
Other features and benefits that make stainless steel a good choice for sanitary applications include:
- Great corrosion resistance
- Extreme strength
- Ease of cleaning
- Low maintenance costs
- Impermeable surface to prevent contamination
- Available in various finishes
- Chemical and bacterial neutrality
Stainless Steel Grades
| Grade | UNS | EN Name | EN Number | JIS | ASTM | ASME | BS/EN |
|---|---|---|---|---|---|---|---|
| TP304/ 304L | S30400/ S30403 | X2CrNi19-11 | 1.4301/1.4307 | SUS304/ 304L | A249, A269, A270, A312, A554 | SA249 | 10217-7 |
| TP316/ 316L | S31600/ S31603 | X2CrNi- Mo17-12-2 | 1.4401/1.4404 | SUS316/ 316L | A249, A269, A270, A312, A554 | SA249 | 10217-7, |
| TP316L 2.5Mo | S31603 | X3CrNi- Mo17-13-3 | 1.4436 | SUS316L | A249, A269, A270, A312, A554 | SA249 | 10217-7 |
| TP316Ti | S31635 | X6CrNiMo- Ti17-12-2 | 1.4571 | A249, A312 | SA249 | 10217-7 | |
| TP317L | S31703 | X2CrNi- Mo18-15-4 | 1.4438 | SUS317L | A249, A269, A312, A554 | SA249 | |
| TP321 | S32100 | X6CrNi- Ti18-10 | 1.4541 | SUS321 | A249, A269, A312, A554 | SA249 | 10217-7, |
| TP347 | S34700 | X6CrN- iNb18-10 | 1.4550 | SUS347 | A249, A269, A312, A554 | SA249 | 10217-7 |
Welded Stainless Steel Sanitary Tubing
Food-grade tubing is produced in standard tubing sizes ranging from 1/2 inch to 8 inches in diameter. The product-contact (ID) surface finish is 20 μ-in Ra (0.5 μm), with an outer diameter (OD) of 30 μ-in Ra (0.8 μm) maximum. Surface finishes are measured per ASME/ANSI B46.1, with the profilometer reading at 90 degrees to the major polishing pattern.
Sanitary Tubing Manufacturing
Polished stainless steel sanitary tubing is manufactured in accordance with ASTM A270. Our tubing is made from cold-rolled stainless steel strips whose chemical elements are specially controlled to enhance weldability. The weld bead is cold-worked to a fully finished condition, resulting in a virtually undetectable longitudinal weld. Bright annealing to 1,900°F minimum follows in a controlled atmosphere to preserve maximum structural integrity.
Sanitary stainless steel tubing is offered in serving the biotech, pharmaceutical, food, beverage, water treatment, and extraction industries and with a wide range of sanitary tubing options including polished, unpolished, and pharmaceutical-grade stainless steel tubing. As a premier sanitary tube supplier, we offer electropolished options that meet ASME BPE standards required for high-purity applications.
Sanitary Tubing Sizes and Tolerances
Sanitary Tubing sizes are 1/2 inch to 8 inch in outside diameter, common sizes have 12.7 mm, 19.05 mm, 25.4 mm, 38.1 mm, 50.8 mm, 63.5 mm, 76.2 mm, 101.6 mm, 152 mm, 152.4 mm, 203.2 mm.
Wall thickness sizes have 1.0 mm, 1.25 mm, 1.5 mm, 1.65 mm, 2.0 mm, and 2.5 mm, custom dimensions are available.
| Outside Diameter, in. (mm) | OD, Over, in. (mm) | OD, Under, in. (mm) | Length, over – under, in. (mm) |
|---|---|---|---|
| 1.000 (25.4) and under | 0.005 (0.13) | 0.005 (0.13) | 1⁄8 (3.2) – 0 |
| Over 1 (25.4) to 2 (50.8) | 0.008 (0.20) | 0.008 (0.20) | 1⁄8 (3.2) – 0 |
| Over 2 (50.8) to 3 (76.2) | 0.010 (0.25) | 0.010 (0.25) | 1⁄8 (3.2) – 0 |
| Over 3 (76.2) to 4 (101.6) | 0.015 (0.38) | 0.015 (0.38) | 1⁄8 (3.2) – 0 |
| Over 4 (101.6) to 5 1⁄2 (139.7), excl | 0.015 (0.38) | 0.015 (0.38) | 3⁄16 (4.8) – 0 |
| 5 1⁄2 (139.7) to 8 (203.2), excl | 0.030 (0.76) | 0.030 (0.76) | 3⁄16 (4.8) – 0 |
| 8 (203.2) to 12 (304.8) | 0.050 (1.27) | 0.050 (1.27) | 3⁄16 (4.8) – 0 |
Stainless Steel Sanitary Tubing Sizes in common
| Size OD | Size OD | Nominal Wall Thickness | Nominal Wall Thickness | Outside Diameter Tolerance | Outside Diameter Tolerance | Length Tolerance | Length Tolerance | Wall Thickness Tolerance |
|---|---|---|---|---|---|---|---|---|
| (In) | (Mm) | (In) | (Mm) | (In) | (Mm) | (In) | (Mm) | (%) |
| ½ | 12.7 | 0.065 | 1.65 | +/-0.005 | +/-0.13 | +⅛, -0 | +3.18, -0 | +/-10.0% |
| ¾ | 19.1 | 0.065 | 1.65 | +/-0.005 | +/-0.13 | +⅛, -0 | +3.18, -0 | +/-10.0% |
| 1 | 25.4 | 0.065 | 1.65 | +/-0.005 | +/-0.13 | +⅛, -0 | +3.18, -0 | +/-10.0% |
| 1½ | 38.1 | 0.065 | 1.65 | +/-0.008 | +/-0.20 | +⅛, -0 | +3.18, -0 | +/-10.0% |
| 2 | 50.8 | 0.065 | 1.65 | +/-0.008 | +/-0.20 | +⅛, -0 | +3.18, -0 | +/-10.0% |
| 2½ | 63.5 | 0.065 | 1.65 | +/-0.010 | +/-0.25 | +⅛, -0 | +3.18, -0 | +/-10.0% |
| 3 | 76.2 | 0.065 | 1.65 | +/-0.010 | +/-0.25 | +⅛, -0 | +3.18, -0 | +/-10.0% |
| 4 | 101.6 | 0.083 | 2.11 | +/-0.015 | +/-0.38 | +⅛, -0 | +3.18, -0 | +/-10.0% |
| 6 | 152.4 | 0.109 | 2.77 | +/-0.030 | +/-0.76 | +3/16, -0 | +4.8, -0 | +/-10.0% |
| 8 | 203.2 | 0.109 | 2.77 | +0.061 -0.031 | +1.55 -0.79 | +3/16, -0 | +4.8, -0 | +/-10.0% |
Tube Marking
All tubing is printed with size, gauge, alloy, ASTM and ASME specifications, heat number, and date of manufacturing for full traceability.
Testing and Packaging
To ensure the highest surface quality, our sanitary tubing goes beyond the requirements of ASTM A269 and A270 by performing the full battery of ASTM bend and deformation tests required by ASME SA249. The tests, combined with specific raw material requirements, Eddy Current testing at the tube mill, 100% bore scoping prior to mechanical polish, and tighter OD and wall tolerances, allow for a more consistent, superior-quality product.
To assure strict accordance with ASTM A270 and 3A, Sanitary tubing is subjected to extensive reverse bend, reverse flattening, flange, and eddy current testing. After successfully completing testing, tubes are sealed with air-tight end caps and individually packaged in high-quality poly sleeves. Tubes are then packaged in heavy-duty tri-wall boxing. Wood boxes are available for export shipments when specified.