What is ASTM A270 SS 316 Material pipe ?
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What is ASTM A270 specification?
ASTM A270 is the standard specification for sanitary stainless steel tubing, designed to minimize bacterial growth and ensure ease of cleaning; it is suitable for sanitary industries such as food processing, dairy, beverage production, pharmaceuticals, and biotechnology. Common material grades include 304, 304L, 316, and 316L stainless steel, available in either seamless (SMLS) or welded (WLD/ERW) forms, with most sanitary piping systems utilizing sizes ranging from 1/2 inch to 4 inches. All tubing is supplied in the fully annealed condition.
ASTM A270 316 Sanitary Tube Manufacturer,Exporter,Supplier
With over 18 years of specialized expertise in manufacturing SS 316 sanitary tubing, GNEE has exported products to more than 50 countries worldwide and successfully executed over 80 projects across the food and beverage, pharmaceutical, biotech, and fine chemical industries.
Our ASTM A270 TP316 sanitary tubing undergoes precision cold forming, inline bright annealing at a minimum of 1040°C, and controlled polishing processes to achieve a uniform, smooth, and defect-free internal surface. The internal surface roughness is engineered to Ra ≤ 0.5 μm (20 μin) and the external surface to Ra ≤ 0.8 μm (30 μin). For pharmaceutical applications, our ASTM A270 TP316 EP (Electropolished) stainless steel tubing achieves an internal surface roughness of Ra ≤ 0.2 μm. This effectively inhibits bacterial adhesion and product residue buildup, facilitating thorough cleanability and minimizing cross-contamination risks.
Furthermore, our ASTM A270 UNS S31600 BA (Bright Annealed) Tube features a Pitting Resistance Equivalent Number (PREN) of 24–26. It maintains structural and dimensional stability during repeated cryogenic to 450°C thermal cycles from Clean-in-Place (CIP) and Sterilize-in-Place (SIP) operations, and demonstrates robust resistance to premature degradation when exposed to common sanitizers, organic acids, and saline solutions.
GNEE supplies ASTM A270 316 sanitary tubing in outside diameters (OD) ranging from 1/4" to 12" (6.35–304.8 mm) and wall thicknesses from 0.9 mm to 3.0 mm, available in both welded and seamless configurations. We also offer tailored surface finishes, custom cut-to-length options from 1 m to 6 m, and value-added fabrication services including precision cutting, orbital beveling, and tube end capping.
ASTM A270 316 Stainless Steel Pipe Specification
ASTM A270 SS 316 Sanitary Tubing Chemical Composition
| Grade | UNS No. | Carbon (C) | Manganese (Mn) | Phosphorus (P) | Sulfur (S) | Silicon (Si) | Chromium (Cr) | Nickel (Ni) | Molybdenum (Mo) |
| TP316 | S31600 | 0.08 max | 2.00 max | 0.045 max | 0.030 max | 1.00 max | 16.0 – 18.0 | 11.0 – 14.0 | 2.0 – 3.0 |
| TP316L | S31603 | 0.035 max | 2.00 max | 0.045 max | 0.030 max | 1.00 max | 16.0 – 18.0 | 10.0 – 15.0 | 2.0 – 3.0 |
Mechanical Properties
| Property | Tensile Strength (min) | Yield Strength 0.2% Offset (min) | Elongation in 2" (min) | Hardness (max) |
| 316 | 515 MPa | 205 MPa | 35 % | 90 HRB / 192 HBW |
ASTM A270 Hygienic Pipe Dimensional Tolerances
| Nominal Size (OD) | OD Tolerance | Wall Thickness (WT) Tolerance | Squareness of Cut (Face) | Standard Lengths |
| 1/2" – 1" | ± 0.005" (0.13 mm) | ± 12.5% | 0.010" (0.25 mm) | 20ft (6.1m) |
| 1-1/2" – 2" | ± 0.008" (0.20 mm) | ± 12.5% | 0.015" (0.38 mm) | 20ft (6.1m) |
| 2-1/2" – 3" | ± 0.010" (0.25 mm) | ± 12.5% | 0.030" (0.76 mm) | 20ft (6.1m) |
| 4" | ± 0.015" (0.38 mm) | ± 12.5% | 0.040" (1.02 mm) | 20ft (6.1m) |
| Above 4" | Negotiable | ± 12.5% | Negotiable | Custom |
Mechanical Polished pipe vs. Electropolished pipe
| Finish Code | Description | Internal Roughness (Ra) | External Roughness (Ra) | Application |
| Mill Finish | Unpolished, Pickled | N/A | N/A | Industrial Utility |
| Mechanical Polished | 180 / 240 / 320 Grit | ≤ 0.5 μm – 0.8 μm | ≤ 0.8 μm | Food & Beverage |
| Electropolished (EP) | Anodic Dissolution | ≤ 0.25 μm – 0.4 μm | ≤ 0.8 μm | Pharmaceutical / Semiconductor |
A270 Sanitary Stainless Steel Pipe Weight Chart
| Nominal WT | Weight | OD | ||
|---|---|---|---|---|
| Inch | mm | (kg/m) | Inch | mm |
| .109 | 2.77 | 8 | 203.2 | |
| .109 | 2.77 | 1.32 | 6 | 152.4 |
| .083 | 2.11 | 5.23 | 4 | 101.6 |
| .065 | 1.65 | 3.06 | 3 | 76.2 |
| 2.54 | 2 1/2 | 63.5 | ||
| 2.02 | 2 | 5.8 | ||
| .454 | 1/2 | 12.7 | ||
| 1.50 | 1 1/2 | 38.1 | ||
| .976 | 1 | 25.4 | ||
| .717 | 3/4 | 19.1 | ||
What size is A270 tubing?
ASTM A270 sanitary stainless pipe usually refers to the small pipe diameters, normally from 1/2" to 2 1/2", thickness from 0.049 in (1.24mm) to 0.15 in (3.81mm). The maximum outer diameter of ASTM A270 tubing is 12 inches (304.8 mm).
What is the surface finish of ASTM A270?
The standard specifies that ASTM A270 stainless steel sanitary tubing must have a maximum interior surface roughness (Ra) of 20 μ-in (0.5 μm) and a maximum exterior surface roughness of 30 μ-in (0.8 μm), measured per ASME/ANSI B46.1.
Applications of ASTM A270 316 Pipe
Pharmaceuticals and Biotechnology: Used in Water for Injection (WFI) systems, clean steam piping, Active Pharmaceutical Ingredient (API) processing, and aseptic fluid transfer.
Food and Dairy Processing: Suitable for conveying milk, fruit juice, sauces, beer, wine, and food additives; particularly ideal for equipment requiring daily Clean-in-Place (CIP) and Sterilize-in-Place (SIP) operations.
Beverage and Brewing: Used in carbonated soft drink dispensing systems, fermentation piping, and bottling/dispensing lines.
316 Pharmaceutical Stainless Steel Tubing
ASTM A270 TP316 Food Grade Stainless Steel Pipe
316 stainless steel pipes for beverage industry
ASTM A270 SS 316 Material pipe price per kg
The price for ASTM A270 SS 316 / 316L stainless steel pipe (typically a polished, sanitary-grade tube) ranges from $9.00 to $15.00 per kg. For larger industrial wholesale quantities, it can drop to $3.00 to $5.00 per kg, depending on the specific wall thickness, surface finish, and order volume.
If you have any requirements regarding the items mentioned above, please contact us promptly to obtain the latest quotations.
Quality Inspection
| Test Category | Methodology | Requirement |
| Flattening Test | ASTM A1016 | No cracks or breaks under specified compression. |
| Flange Test | ASTM A1016 | Flange width ≥ 15% of OD without cracking. |
| Hydrostatic / Eddy Current | NDT | 100% Leak-tight integrity verified. |
| Reverse Bend Test | Transverse | Ensures weld ductility and fusion quality. |
| Visual Inspection | Manual/Borescope | Surface must be free of scales, pits, and scratches. |
High-quality packaging
Individual packaging: Each tube is enclosed in an independent plastic sleeve.
Tube end sealing: Fitted with a secure plastic cap to prevent the entry of dust, moisture, or insects during transport and storage.
FAQ
What is the difference between ASTM A270 and A554?
ASTM A270 and A554 are specifications for stainless steel tubing, but they serve completely different purposes. A270 is a sanitary/hygienic specification designed for food, dairy, and pharmaceutical processing. A554 is a mechanical specification used for structural, ornamental, and decorative applications (such as handrails and exhaust pipes).
What is the difference between A270 and A269?
A270 falls under sanitary-grade specifications, requiring highly polished internal and external surfaces to prevent contamination in food, beverage, and pharmaceutical applications; in contrast, A269 is a general-service standard that focuses primarily on mechanical integrity and corrosion resistance, with relatively lower requirements for surface quality.
Which is better for sanitary-grade piping: 316 or 316L?
In the vast majority of cases, 316L is the better and more commonly used choice.
The reason: The "L" stands for "Low Carbon." During welding, 316L effectively prevents "intergranular corrosion" (corrosion caused by carbide precipitation). Sanitary piping systems often require extensive on-site welding, and 316L ensures that the corrosion resistance of the weld zone matches that of the pipe itself.
