EN 10357 Stainless Steel Sanitary Tubing
- International Standard
- Material Grades
- Outer Diameter
- Wall Thickness
- Surface
- Tube Type
- Mill Test Certificate(MTC)
- Certificate
- EN 10357
- AISI 304/304L/316/316L
- DN10 - DN250
12mm - 254mm - 1.0mm, 1.5mm ,2.5mm
- Grit 180, 240, 320
≤20Ra (0.5 μm) ID , ≤30Ra (0.8 μm) OD - Welded , Seamless
- EN10204 3.1
- ISO 9001:2015 , PED 2014/68/EU , AD 2000-WO
EN 10357 (European Norm) specify austenitic stainless steel seamless and welded tubes for hygienic applications, particularly in the food, beverage, pharmaceutical, and chemical industries. These standards ensure high cleanliness, corrosion resistance, and smooth surfaces for sanitary processes.
Dimension of EN 10357 Sanitary Tubing
The wall thickness is relatively thin, making it suitable for low-pressure or normal-temperature applications (such as low-pressure conveying in the food and pharmaceutical industries).
Typical applications: Non-corrosive media or low-pressure scenarios
| Nominal Diameter | Tube OD | Tolerances, OD | Wall Thickness | Telerances, WT | Telerances, Length | Weight |
|---|---|---|---|---|---|---|
| mm | mm | mm | mm | Kg/m | ||
| DN10 | 12 | ±0.12 | 1.0 | ±10% | ＋3.0 | 0.27 |
| DN15 | 18 | ±0.12 | 1.0 | ±10% | ＋3.0 | 0.42 |
| DN20 | 22 | ±0.12 | 1.0 | ±10% | ＋3.0 | 0.51 |
| DN25 | 28 | ±0.12 | 1.0 | ±10% | ＋3.0 | 0.66 |
| DN32 | 34 | ±0.12 | 1.0 | ±10% | ＋3.0 | 0.82 |
| DN40 | 40 | ±0.12 | 1.0 | ±10% | ＋3.0 | 0.97 |
| DN50 | 52 | ±0.2 | 1.0 | ±10% | ＋3.0 | 1.27 |
Medium wall thickness, combining strength and lightweight, suitable for medium pressure or general industrial applications.
Typical applications: Chemical industry, water treatment and other conventional working conditions.
| Nominal Diameter | Tube OD | Tolerances, OD | Wall Thickness | Tolerances, WT | Tolerances, Length | Length |
|---|---|---|---|---|---|---|
| mm | mm | mm | mm | (m) | ||
| DN10 | 13 | ±0.3 | 1.5 | ±10% | ＋3.00 | 0.43 |
| DN15 | 19 | ±0.3 | 1.5 | ±10% | ＋3.00 | 0.66 |
| DN20 | 23 | ±0.3 | 1.5 | ±10% | ＋3.00 | 0.81 |
| DN25 | 29 | ±0.3 | 1.5 | ±10% | ＋3.00 | 1.03 |
| DN32 | 35 | ±0.3 | 1.5 | ±10% | ＋3.00 | 1.26 |
| DN40 | 41 | ±0.3 | 1.5 | ±10% | ＋3.00 | 1.50 |
| DN50 | 53 | ±0.3 | 1.5 | ±10% | ＋3.00 | 1.944 |
| DN65 | 70 | ±0.3 | 2.0 | ±10% | ＋3.00 | 3.43 |
| DN80 | 85 | ±0.3 | 2.0 | ±10% | ＋3.00 | 4.16 |
| DN100 | 104 | ±0.3 | 2.0 | ±10% | ＋3.00 | 5.03 |
| DN125 | 129 | ±0.4 | 2.0 | ±10% | ＋10.00 | 6.36 |
| DN150 | 154 | ±0.4 | 2.0 | ±10% | ＋10.00 | 7.612 |
| DN200 | 204 | ±0.4 | 2.0 | ±10% | ＋10.00 | 10.116 |
| DN250 | 254 | ±0.4 | 2.0 | ±10% | ＋20.00 | 12.555 |
| DN300 | 304 | ±0.4 | 2.0 | ±10% | ＋20.00 | 15.045 |
The wall thickness is relatively thick, with a higher pressure-bearing capacity, making it suitable for high-pressure, high-temperature or highly corrosive media.
Typical applications: High-pressure steam, strong acids, strong alkalis and other harsh environments.
| Nominal Diameter | Tube OD | Tolerances, OD | Wall Thickness | Tolerances, WT | Tolerances, Length | Weight |
|---|---|---|---|---|---|---|
| mm | mm | mm | mm | Kg/m | ||
| 10 | 14 | ±0.3 | 2.0 | ±10% | +3.00 | 0.60 |
| 15 | 20 | ±0.3 | 2.0 | ±10% | +3.00 | 0.90 |
| 20 | 24 | ±0.3 | 2.0 | ±10% | +3.00 | 1.10 |
| 25 | 30 | ±0.3 | 2.0 | ±10% | +3.00 | 1.40 |
| 32 | 36 | ±0.3 | 2.0 | ±10% | +3.00 | 1.70 |
| 40 | 42 | ±0.3 | 2.0 | ±10% | +3.00 | 2.00 |
| 50 | 54 | ±0.3 | 2.0 | ±10% | +3.00 | 2.60 |
Finish Specifications
| Process | RA Micro Inch | RA Micron | ISO Designation |
|---|---|---|---|
| 150 grit | 30-35 | 0.75-0.875 | N6 |
| 150 grit + Electropolish | 12-20 | 0.3-.05 | |
| 180 grit | 20-25 | 0.5-.0625 | |
| 180 grit + Electropolish | 10-16 | 0.25-0.4 | |
| 240 grit | 15-20 | 0.375-0.5 | N5 |
| 240 grit + Electropolish | 8-12 | 0.2-0.3 | |
| 320 grit | 8-12 | 0.2-0.3 | N4 |
| 320 grit + Electropolish | 6-12 | 0.15-0.3 |
Chemical Composition of Stainless Steel Tubing
| TUBE GRADES | UNS | Cr | Ni | Mo | C | P | S | Mn | Si |
| TP304 | S30400 | 18.0-20.0 | 8.0-11.0 | – | 0.08 | 0.045 | 0.03 | 2 | 1 |
| TP304L | S30403 | 18.0-20.0 | 8.0-13.0 | – | 0.035 | 0.045 | 0.03 | 2 | 1 |
| TP316 | S3160 | 16.0-18.0 | 11.0-14.0 | 2.0-3.0 | 0.08 | 0.045 | 0.03 | 2 | 1 |
| TP316L | S31603 | 16.0-18.0 | 10.0-14.0 | 2.0-3.0 | 0.035 | 0.045 | 0.03 | 2 | 1 |
Tensile Properties of Stainless Steel Tubing
| Material | Heat Treatment | Yield Strength Ksi (MPa), Min. | Tensile Strength Ksi (MPa), Min. | Temperure Min. ℉(℃) | Elongation %, Min |
| ASME SA270 304 | Solution | 30(205) | 75(515) | 1900 (1040) | 35 |
| ASME SA270 304L | Solution | 25(170) | 70(485) | 1900 (1040) | 35 |
| ASME SA270 316 | Solution | 30(205) | 75(515) | 1900(1040) | 35 |
| ASME SA270 316L | Solution | 25(170) | 70(485) | 1900(1040) | 35 |
Sanitary Fittings in Process Piping (Food, Pharma, Dairy, etc.)
In industrial contexts, Sanitary Fittings (or Hygienic Fittings) refer to the specialized components used to connect pipes in systems where purity and cleanliness are critical. They are designed to prevent bacterial growth, allow for complete cleaning, and ensure product integrity.
Key Idea: These are the connectors and pipes themselves, used to build a system for processing sensitive products.
Key Characteristics:
Smooth, Polished Surfaces: Internally, they have a very smooth finish (often measured in Ra micro-inches) to prevent bacteria from clinging and to allow for easy cleaning.
No Crevices or Dead Spaces: They are designed to be flush with the pipe, creating a seamless flow path so that product or cleaning fluids don’t get trapped.
Easy to Disassemble and Clean (CIP/SIP): They are designed for frequent cleaning, often using methods like Clean-in-Place (CIP) or Sterilize-in-Place (SIP).
Material: Almost exclusively made from 304 or 316L Stainless Steel for its corrosion resistance and non-reactivity.
Common Types of Sanitary Fittings:
Clamp Fittings (Tri-Clamp): The most common type, using a three-piece clamp to seal a gasket between two ferrules.
Butt Weld Fittings: Permanently welded to create a perfectly smooth, crevice-free joint. Used where disassembly isn’t needed.
Bevel Seat Fittings: An older style, similar to clamp fittings but with a different gasket and connection system.
DIN/SMS Fittings: Standards more common in Europe, using a threaded nut to compress a gasket.
Common Components:
Elbows (90°, 45°)
Tees
Reducers
Caps
Ferrule (the stub end that gets connected)
EN 10357 EN 10357 EN 10357 EN 10357
