Products Description
ASTM A269 Sanitary Food Capillary Stainless Steel Tube
Advantages of ASTM A269 Sanitary Food Capillary Stainless Steel Tube
- Surface Finish: Made of food-grade materials (such as 304 and 316L), the surface is polished to a high interior finish of Ra ≤ 0.8 μm.
- High and Low Temperature Resistance: Resistant to high-temperature sterilization and low-temperature refrigeration environments commonly encountered in food processing, ensuring stable performance.
- Consistent Dimensions: Tight tolerances ensure precise fluid transfer and instrumentation.
Uses of ASTM A269 Sanitary Food Capillary Stainless Steel Tube
- Instrumentation and control: Capillaries for flow measurement and dosing equipment, pressure gauges, and sensors.
- Chemical and laboratory applications: Analytical instruments requiring precise flow rates.
- Pharmaceutical and biotechnology: Process piping for pharmaceutical and vaccine manufacturing.
- Food and beverage processing: Milk, cream, and yogurt transfer lines.
- Dairy industry: Pasteurizer piping and ultra-high temperature processing lines.
Chemical Composition
| Grade | Carbon | Manganese | Silicon | Phosphorus | Sulfur | Chromium | Nickel | Molybdenum |
|---|---|---|---|---|---|---|---|---|
| 304 | ≤0.08% | ≤2.0% | ≤1.0% | ≤0.045% | ≤0.030% | 18.0–20.0% | 8.0–10.5% | – |
| 304L | ≤0.035% | ≤2.0% | ≤1.0% | ≤0.045% | ≤0.030% | 18.0–20.0% | 8.0–12.0% | – |
| 316 | ≤0.08% | ≤2.0% | ≤1.0% | ≤0.045% | ≤0.030% | 16.0–18.0% | 10.0–14.0% | 2.0–3.0% |
| 316L | ≤0.035% | ≤2.0% | ≤1.0% | ≤0.045% | ≤0.030% | 16.0–18.0% | 10.0–14.0% | 2.0–3.0% |
Mechanical Properties
To ensure surface quality, our sanitary tubing undergoes a full suite of ASTM bend and deformation tests per ASME A269. These tests, combined with specific raw material requirements, eddy current testing at the tubing mill, 100% bore clearance before mechanical polishing, and tighter OD and wall tolerances, result in a more consistent, higher-quality product.
| Property | Tensile Strength (MPa) | Yield Strength (MPa) | Elongation (%) | Hardness (HB) |
| 304/304L | 205–215 | 515–750 | ≥ 40 | 201–217 |
| 316/316L | 205–220 | 515–750 | ≥ 40 | 217–248 |
Possible Alternative Grades
- ASTM A270: When more stringent hygiene requirements and a smooth surface finish (electropolishing) are required.
- AISI 904L: Suitable for highly acidic food processing and corrosive cleaning environments.
- Duplex stainless steel (S32205, S32750): Offers higher strength and enhanced resistance to chloride stress corrosion cracking.
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