Stainless Steel Sanitary Tube, ASME SA270 TP304 1.4301 Seamless/Welded and Polished
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Stainless Steel Sanitary Tube, ASME SA270 TP304 1.4301 Seamless/Welded and Polished
ASTM A270/ASME SA270 specification covers grades of seamless, welded, and heavily cold worked austenitic and ferritic/austenitic stainless steel sanitary tubing. Seamless tubes shall be manufactured by a process that does not involve welding at any stage. Welded tubes shall be made using an automated welding process with no addition of filler metal during the welding process.
Stainless Steel Sanitary Tube per ASME SA270, grade TP304 (equivalent to 1.4301), available in seamless or welded construction and finished with a polished interior/exterior surface. It is designed for high-purity, corrosion-resistant applications in hygienic industries such as food processing, beverage, pharmaceutical, biotechnology, and dairy. The polished surface ensures low roughness, easy cleaning, and resistance to bacterial adhesion, complying with strict sanitary standards.
| Grade | UNS No. | Old British | European Norm | Japanese JIS | ||
| BS | En | No | Name | |||
| TP304 | S30400 | 304S31 | 58E | 1.4301 | X5CrNi18-10 | SUS 304 |
Chemical & Mechanical Properties
| ASME SA270 TP304 Chemical Composition (%) | ||||||
| C |
Mn |
P | S |
Si |
Cr | Ni |
| ≤0.08% | ≤2.00% | ≤0.045% | ≤0.030% | ≤1.00% | 18.0%~20.0% | 8.0%~11.0% |
Mechanical Properties
|
Tensile Strength
|
Yield Strength | Elongation | Hardness(Rockwell) Number |
| ≥ 515MPa | ≥ 205MPa | ≥ 35% | ≤ B90 |
Permissible Variations in Dimensions
|
Size, Outside, Diameter, in. [mm] |
Permissible Variations in Outside Diameter, in. [mm] |
Pemissible Variations in Cut Length, in. [mm] |
||
| 1.000 [25] and under | 0.005 [0.13] | 0.005 [0.13] | 1/8 | 0 |
| Over 1 [25] to 2 [50] | 0.008 [0.20] | 0.008 [0.20] | 1/8 | 0 |
| Over 2 [50] to 3 [75] | 0.010 [0.25] | 0.010 [0.25] | 1/8 | 0 |
| Over 3 [75] to 4 [100] | 0.015 [0.38] | 0.015 [0.38] | 1/8 | 0 |
| Over 4 [100] to5 [140], excl | 0.015 [0.38] | 0.015 [0.38] | 3/16 | 0 |
| 5 1/2 [140] to 8 [200],excl | 0.030 [0.75] | 0.030 [0.75] | 3/16 | 0 |
| 8 [200] to 12 [300] | 0.050 [1.25] | 0.050 [1.25] | 3/16 | 0 |
Key Adventages
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Corrosion resistance suitable for acidic and alkaline food, beverage, and pharmaceutical media.
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Internal smooth surface prevents product adhesion, bacterial growth, and facilitates CIP/SIP (Clean-in-Place / Sterilize-in-Place) cleaning.
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Full traceability of heat analysis and material certification per ASME SA270.
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Option for polished exterior to improve cleanability and aesthetic appearance.
Key Applications
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Dairy, beer, wine, juice, soft drink production lines
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Pharmaceutical and biotech pure water / WFI systems
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Cosmetic and personal care product transfer lines
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High-purity chemical and semiconductor support systems (where 304 grade is acceptable)
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