ASTM A270 TP304L Stainless Steel Hygienic Tubing
Technique：Cold Drawn
Material：Stainless Steel
Surface Treatment：Polished
Section Shape：Round
Sample：Free
Package：Seaworthy Package
Delivery Date：1-15 Days
Certificate：ISO9001
Transport Package：Seaworthy Package
Specification：Customized
ASTM A270 TP304L Stainless Steel Hygienic Tubing Supplier
If you are looking for a sanitary stainless steel tube that balances hygienic performance, corrosion resistance, weldability, and procurement cost, ASTM A270 TP304L is a widely used austenitic stainless steel material in food, beverage, dairy, brewery, cosmetics, and general pharmaceutical fluid systems. Designed with a low-carbon chemistry (C ≤ 0.035%), TP304L minimizes the risk of intergranular corrosion sensitization during welding and thermal processing; its typical austenitic microstructure of Cr 18–20% and Ni 8–12% provides good corrosion resistance, formability, and weldability. Compared with TP316L, TP304L generally offers superior cost advantages in non-high-chloride and non-severely corrosive media, making it particularly suitable for large-volume sanitary piping procurement.
The advantages of ASTM A270 TP304L are reflected not only in the material itself, but also in internal surface quality and cleanability. A smooth, continuous inner wall minimizes media residue and contaminant retention, making it well-suited for CIP (Clean-in-Place) and SIP (Sterilization-in-Place) systems. Mechanically polished products can be controlled to Ra ≤ 0.8 μm (32 μin) according to project requirements, while electropolished (EP) products can achieve Ra ≤ 0.4 μm (15 μin), ideal for food, beverage, and biopharmaceutical equipment with higher surface cleanliness requirements.
GNEE provides a wide range of sanitary tubing sizes and surface conditions compliant with ASTM A270 and customer project requirements. Common specifications cover OD 1/2″–12″ (12.7–304.8 mm), with wall thickness options including 16 Ga (0.065″), 14 Ga (0.083″), and 12 Ga (0.109″), along with custom cut-to-length production. Surface finishes include 2B, No.4, mechanical polishing, and electropolishing (EP). For pressure applications, allowable working pressures should be calculated based on outer diameter, actual wall thickness, design temperature, allowable material stress, manufacturing method, and applicable codes such as ASME B31.3; burst pressure test data cannot be directly equated to on-site working pressure.
To help you narrow down your options or find the right tubing for your application,
could you please provide the following information: What are the required outer diameter (OD) and wall thickness?
Are there specific requirements for maximum internal surface roughness (target Ra value) or surface finish (e.g., mechanical polishing vs. electropolishing)?
What is the primary medium or fluid flowing through the system?
304L Sanitary Stainless Steel Tube Specification
| Material | Stainless Steel 304/304L/316L |
| Shape | Round / Square / Rectangle |
| Production Standards | ASTM A270 |
| Outer Diameter | 16mm - 2000mm |
| Thickness | 0.8mm - 20 mm |
| Length | 6 Meters - 18.3 Meters ; As customers' request ; |
| Tolerance | According to the Standard , +/-10% Commonly ; |
| Surface Treatment | 180#, 320#, 400# Satin / Hairline, Bright Anneal, Pickle,400#, 500#, 600# or 800# Mirror finish |
| Application | Suitable For Industries With High Hygiene Requirements Such As Beer, Beverage, Milk, Pharmaceuticals, Etc. |
| Test | Flaring test ; Flattening test ; Bending Test ; Hydraulic Test ; Eddy Current test |
| Design | OEM / ODM / Customized |
| Certificate | ISO9001 ; ISO14001; ISO 18001; TUV ; |
Chemical Composition (Weight %)
| Element | Composition (%) |
| Carbon (Max) | 0.030 |
| Chromium | 18.0 – 20.0 |
| Nickel | 8.0 – 12.0 |
| Manganese (Max) | 2.00 |
| Silicon (Max) | 1.00 |
| Phosphorus (Max) | 0.045 |
| Sulfur (Max) | 0.030 |
| Iron | Balance |
Mechanical Properties
While ASTM A270 emphasizes surface finish, the material must meet these base mechanical requirements.
| Property | Metric Value |
| Tensile Strength, min. | 485 MPa |
| Yield Strength (0.2% Offset), min. | 170 MPa |
| Elongation (in 2" or 50mm), min. | 35 % |
| Hardness (Rockwell B), max. | 90 HRB |
| Hardness (Brinell), max. | 192 HBW |
ASTM A270 Dimensional Tolerances
Specific to ASTM A270 for Outside Diameter (OD) and Wall Thickness.
|
Size Outside Diamter ,in.(mm) |
Permissible Variations in Outside Diameter,In.(mm) |
Permissible Variations in Wall Thickness |
Permissible Variations in Cut Length |
|
≤ 1" (25.4mm) |
±0.005" (0.13mm) |
± 10% |
+1/8″ (3.2mm) / -0 |
|
> 1"(25.4mm), ≤ 2"(50.8mm) |
±0.008"(0.20mm) |
± 10% |
+1/8″ (3.2mm) / -0 |
|
> 2"(50.8mm), ≤3"(76.2mm) |
±0.010(0.25mm) |
± 10% |
+1/8″ (3.2mm) / -0 |
|
>3"(76.2mm), ≤4"(101.6mm) |
±0.015"(0.38mm) |
± 10% |
+1/8″ (3.2mm) / -0 |
|
>4"(101.6mm), < 5 1/2"(139.7mm) |
±0.015"(0.38mm) |
± 10% |
+3/16"(4.8mm) / -0 |
|
>5 1/2"(139.7mm), ≤ 8"(203.2mm) |
±0.030"(0.76mm) |
± 10% |
+3/16"(4.8mm) / -0 |
|
>8"(203.2mm), <12"(304.8mm) |
± 0.050"(1.27mm) |
± 10% |
+3/16"(4.8mm) / -0 |
ASTM A270 TP304L Stainless Steel Round pipe Applications
Suitable for use in food and beverage production lines, dairy processing and UHT systems, beer and craft brewing equipment, beverage filling lines, cosmetics manufacturing, general pharmaceutical fluid transfer, and certain Purified Water (PW) systems. For applications involving high chloride ion concentrations, elevated temperatures, or more aggressive corrosive environments within the pharmaceutical sector, the use of TP316L or materials with superior corrosion resistance should be evaluated.
ASTM A270 TP304L Stainless Steel Hygienic Tubing price per kg
The price of ASTM A270 TP304L sanitary stainless steel tubing typically ranges from $2.68 to $4.36 per kilogram (for small-batch retail or specific cut lengths); for bulk or wholesale purchases, the price is approximately $650 to $1,500 per metric ton (equivalent to $0.65 to $1.50 per kilogram).
To provide a more accurate quotation, could you please specify:
The approximate purchase quantity or weight?
The required outer diameter (OD) and wall thickness (or gauge)?
And whether you have specific surface finish or polishing requirements (e.g., ID 20Ra / OD 32Ra)?
Quality Control
Procedures include PMI/OES chemical composition verification, dimensional inspections, surface roughness testing, and hydrostatic or applicable non-destructive testing (NDT). For specific sanitary-grade projects, compliance with standards such as 3-A, ASME BPE, ISO 2037, and EHEDG can be assessed based on customer requirements.
GNEE PACKAGING AND SHIPPING
Standard packaging utilizes PE end caps, stretch wrap, steel strapping, and wooden crates or pallets to minimize impact, contamination, and surface damage during transit. Lead times are approximately 3–7 days for stocked specifications and typically 30–45 days for non-stocked or custom specifications, subject to final confirmation based on specifications, quantities, surface finishes, and testing requirements.
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