Sanitary Stainless Steel Tubing

CSI offers RathGibson’s sanitary tubing that exceeds ASTM A270 S2 and 3-A specifications. It is manufactured from the finest quality stainless steel materials made exclusively to RathGibson melt criteria.

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 – 8 inch OD (12.7 – 203.2 millimeter OD) in 20-foot (6.1-meter) lengths.

Give us a call for all of your installation materials, whether it's tubing, fittingscustom equipment, or more.

RathGibson sanitary tubing exceeds ASTM A270 S2 and 3-A specifications.


CSI's sanitary food-grade tubing is manufactured by RathGibson. 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 in all of our sanitary tubing, RathGibson goes beyond the requirements of ASTM A269 and A270 by performing the full battery of ASTM bend and deformation tests required by ASME SA249 as well as additional deformation tests developed by RathGibson. The tests, combined with specific raw material requirements, Eddy Current testing at the tube mill, 100% boroscoping prior to mechanical polish, and tighter OD and wall tolerances, allow RathGibson to provide a more consistent, superior quality product.


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. RathGibson’s polishing techniques result in surface finishes that lead the industry. All tubing is printed with size, gauge, alloy, ASTM and ASME specifications, heat number, and date of manufacturing for full traceability.


As a final step in maintaining purity standards, RathGibson’s A270 S2 tubing is packaged using protective 2 mil poly sleeving along with airtight plastic end caps.

Chemical Composition
Element304 (wt%)316L (wt%)
Carbon (max)0.0350.035
Manganese (max)2.002.00
Phosphorus (max)0.0400.040
Sulfur (max)0.0300.030**
Silicon (max)0.750.75
Nickel8.0 – 13.010.0 – 15.0
Chromium18.0 – 20.016.0 – 18.0
MolybdenumN/A2.0 – 3.0
Dimensional Tolerances
Size OD Nominal Wall Thickness Outside Diameter Tolerance Length Tolerance Wall Thickness Tolerance
½12.70.0651.65+/-0.005+/-0.13+⅛, -0+3.18, -0+/-10.0%
¾19.10.0651.65+/-0.005+/-0.13+⅛, -0+3.18, -0+/-10.0%
125.40.0651.65+/-0.005+/-0.13+⅛, -0+3.18, -0+/-10.0%
38.10.0651.65+/-0.008+/-0.20+⅛, -0+3.18, -0+/-10.0%
250.80.0651.65+/-0.008+/-0.20+⅛, -0+3.18, -0+/-10.0%
63.50.0651.65+/-0.010+/-0.25+⅛, -0+3.18, -0+/-10.0%
376.20.0651.65+/-0.010+/-0.25+⅛, -0+3.18, -0+/-10.0%
4101.60.0832.11+/-0.015+/-0.38+⅛, -0+3.18, -0+/-10.0%
6152.40.1092.77+/-0.030+/-0.76+1, -0+25.4, -0+/-10.0%

Product Literature

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