Food-Grade Stainless Steel Tubing
CSI offers sanitary tubing that exceeds ASTM A270 S2 and 3-A specifications. It is manufactured from the finest quality stainless steel materials.
CSI offers industry-leading welded sanitary tubing along with technical expertise and unmatched service before and after the sale. We stock all standard sanitary tubing sizes ½ – 12 inch OD (12.7 – 304.8 millimeter OD) in 20-foot (6.1-meter) lengths.
Give us a call for all of your installation materials, whether it's tubing, fittings, custom equipment, or more.
Tubing exceeds ASTM A270 S2 and 3-A specifications.
Specifications
CSI's sanitary food-grade tubing ships in standard tubing sizes ranging from 1/2 inch to 12 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.
Mechanical Tests
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% borescoping prior to mechanical polish, and tighter OD and wall tolerances, allows for a more consistent, superior quality product.
Annealing
Tubing is hydrogen bright annealed in line to 1900°F (1040°C) minimum and rapidly quenched.
Surface Finish
Surface finish is 20 μ-in Ra (0.5 μm) ID maximum, 30 μ-in Ra (0.8 μm) OD maximum surface roughness measured per ASME/ANSI B46.1 with the profilometer reading at 90 degrees to major polishing pattern. All tubing is printed with size, gauge, alloy, ASTM and ASME specifications, heat number, and date of manufacturing for full traceability.
Packaging
As a final step in maintaining purity standards, A270 S2 tubing is packaged using protective 2 mil poly sleeving along with airtight plastic end caps.
Chemical Composition
| Element | 304 (wt%) | 316L (wt%) |
|---|---|---|
| Carbon (max) | 0.035 | 0.035 |
| Manganese (max) | 2.00 | 2.00 |
| Phosphorus (max) | 0.040 | 0.040 |
| Sulfur (max) | 0.030 | 0.030** |
| Silicon (max) | 0.75 | 0.75 |
| Nickel | 8.0 – 13.0 | 10.0 – 15.0 |
| Chromium | 18.0 – 20.0 | 16.0 – 18.0 |
| Molybdenum | N/A | 2.0 – 3.0 |
| Iron | Balance | Balance |
| Copper | N/A | N/A |
| Nitrogen | N/A | N/A |
Dimensional Tolerances
| Size OD | Nominal Wall Thickness | Outside Diameter 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 | +1, -0 | +25.4, -0 | +/-10.0% |
| 8 | 203.2 | 0.109 | 2.77 | +0.061 -0.031 | +1.55 -0.79 | +1, -0 | +25.4, -0 | +/-10.0% |
Sanitary Tube Specifications
| Tube OD | Tube ID | Wall Thickness | Volume | Weight Dry* | Weight with Water** | Flow (gpm) at Mean Velocity | ||
|---|---|---|---|---|---|---|---|---|
| (in) | (in) | (in) | (gal/100 ft) | (lbs/100 ft) | (lbs/100 ft) | (5 fps) | (7 fps) | (10 fps) |
| ¼ | 0.180 | 0.035 | 0.13 | 8.1 | 9.2 | 0.40 | 0.56 | 0.79 |
| ⅜ | 0.305 | 0.035 | 0.38 | 12.9 | 16.0 | 1.14 | 1.59 | 2.28 |
| ½ | 0.370 | 0.065 | 0.56 | 30.6 | 35.3 | 1.7 | 2.3 | 3.4 |
| ¾ | 0.620 | 0.065 | 1.57 | 48.2 | 61.3 | 4.7 | 6.6 | 9.4 |
| 1 | 0.870 | 0.065 | 3.09 | 65.8 | 91.5 | 9.3 | 13 | 19 |
| 1½ | 1.370 | 0.065 | 7.66 | 100.9 | 164.8 | 23 | 32 | 46 |
| 2 | 1.870 | 0.065 | 14.27 | 136.1 | 255.1 | 43 | 60 | 86 |
| 2½ | 2.370 | 0.065 | 22.92 | 171.2 | 362.4 | 69 | 96 | 138 |
| 3 | 2.870 | 0.065 | 33.60 | 206.4 | 486.7 | 101 | 141 | 202 |
| 4 | 3.834 | 0.083 | 59.97 | 351.8 | 851.9 | 180 | 252 | 360 |
| 6 | 5.782 | 0.109 | 136.39 | 694.7 | 1832.2 | 409 | 573 | 818 |
| 8 | 7.782 | 0.109 | 247.07 | 930.6 | 2991.1 | 741 | 1038 | 1482 |
| 10 | 9.782 | 0.109 | 390.38 | 1,166.5 | 4,422.2 | 1,171 | 1,640 | 2,342 |
| 12 | 11.782 | 0.109 | 566.33 | 1,402.4 | 6,125.5 | 1,699 | 2,379 | 3,398 |
*Weight dry is based on 0.287 lb/in³.
**Weight with water is based on 8.34 lb/gal.
Product Resources
Literature
Create a MyCSI Dashboard to save resources for quick reference, track orders, and talk with experts.
Create a MyCSI Dashboard to save resources for quick reference, track orders, and talk with experts.
It only takes a minute.
Sign in
Sign in to save resource to your dashboard.
Literature for Sanitary Stainless Steel Tubing have been saved to your dashboard!
Literature for Sanitary Stainless Steel Tubing are already in your dashboard.