Dairy Tube Expander
What are Dairy Tube Expanders?
A Dairy Tube Expander is a precision tool used to expand stainless steel tube ends for leak-proof, hygienic fittings without welding. Commonly used in dairy, food, beverage, and pharmaceutical industries, it ensures a secure mechanical seal while preserving sanitary standards. By uniformly enlarging tube ends, it fits ferrules and connectors precisely.
Asaid Steel Industries offers durable, easy-to-operate Dairy Tube Expanders compatible with standard tube sizes, ideal for heat exchanger assemblies and sterile piping systems.
Key Features
Precision
Fit
Robust
Design
Easy to
Clean
Standards
Compliant
Corrosion
Resistant
Specifications
| Specification Category | Parameter / Feature | Details / Options |
|---|---|---|
| Size Range | Tube Outside Diameter (OD) | 6 mm to 101.6 mm (¼” to 4”) |
| Tube Thickness | 0.5 mm to 3.0 mm | |
| Expansion Range | Expansion Percentage | 4% – 10% (material & design dependent) |
| Tube Length Compatibility | Up to 6 meters | |
| Application Type | Usage | Expanding tubes in Dairy, Food, Beverage, Brewery & Pharmaceutical heat exchangers, condensers, and evaporators |
| Material Options | Expander Rolls & Mandrels | High-Speed Steel (HSS), Carbide-Tipped, Alloy Steel |
| Body / Holder | Alloy Steel, Case Hardened & Ground | |
| Drive Type | Actuation | Hand-operated, Pneumatic, Electric, Hydraulic drive compatible |
| Standards & Certifications | Compliance | ASME, DIN, ISO, 3A Dairy Standards |
| Certifications | ISO 9001, CE Marking | |
| Design Features | Rollers | 3, 4, or 5 rollers for uniform expansion |
| Expansion Length | Short, Medium, Long reach designs available | |
| Adjustability | Adjustable thrust collar for depth control | |
| Surface Finish | Finish on Expanded Tube | Smooth, burr-free expansion ensuring hygienic, crevice-free joint |
| Tolerance | Expansion Accuracy | ±0.05 mm on diameter |
| Testing & Inspection | Performance Testing | Torque Test, Durability Test, Expansion Consistency Test |
| Non-Destructive Testing | Visual, Dimensional Accuracy | |
| Optional Features | Special Coating | Titanium Nitride (TiN) coating for extended tool life |
| Custom Options | Special sizes, custom mandrels for non-standard tube ODs |
Dimensions
| Tube OD (mm) | Tube OD (inch) | Wall Thickness Range (mm) | Roller Length (mm) | Mandrel Length (mm) | No. of Rollers | Expander Model / Size |
|---|---|---|---|---|---|---|
| 12.7 | ½” | 0.5 – 1.0 | 30 – 40 | 100 – 120 | 3 | Size ½” |
| 15.88 | ⅝” | 0.5 – 1.2 | 35 – 45 | 110 – 130 | 3 | Size ⅝” |
| 19.05 | ¾” | 0.6 – 1.5 | 40 – 50 | 120 – 140 | 3 | Size ¾” |
| 22.22 | ⅞” | 0.6 – 1.6 | 45 – 55 | 130 – 150 | 3 | Size ⅞” |
| 25.40 | 1” | 0.7 – 2.0 | 50 – 65 | 140 – 160 | 3 | Size 1” |
| 31.75 | 1 ¼” | 0.8 – 2.2 | 55 – 70 | 160 – 180 | 3 | Size 1 ¼” |
| 38.10 | 1 ½” | 0.9 – 2.5 | 65 – 80 | 180 – 200 | 5 | Size 1 ½” |
| 44.45 | 1 ¾” | 1.0 – 2.8 | 70 – 85 | 200 – 220 | 5 | Size 1 ¾” |
| 50.80 | 2” | 1.0 – 3.0 | 75 – 90 | 220 – 240 | 5 | Size 2” |
| 63.50 | 2 ½” | 1.2 – 3.2 | 80 – 100 | 240 – 260 | 5 | Size 2 ½” |
| 76.20 | 3” | 1.5 – 3.5 | 90 – 120 | 260 – 280 | 5 | Size 3” |
| 88.90 | 3 ½” | 1.5 – 4.0 | 100 – 130 | 280 – 300 | 5 | Size 3 ½” |
| 101.60 | 4” | 2.0 – 4.5 | 110 – 140 | 300 – 320 | 5 | Size 4” |
Mechanical Properties
| Property | Value | Unit / Standard |
|---|---|---|
| Tensile Strength | 600 – 850 | MPa (High-Speed Steel / Alloy Steel Rolls & Mandrel) |
| Yield Strength | 350 – 650 | MPa |
| Hardness | 45 – 65 | HRC (Rockwell Hardness, Rollers & Mandrel) |
| Elongation | ≥ 10 – 15 | % |
| Density | 7.7 – 8.1 | g/cm³ |
| Impact Toughness | ≥ 20 – 40 | J (Charpy, tool material-dependent) |
| Modulus of Elasticity (E) | ~210 | GPa |
| Fatigue Strength | 300 – 600 | MPa (tool steel grade-dependent) |
| Corrosion Resistance | Good (Alloy Steel) to Excellent (with TiN coating / Stainless Steel) | – |
| Thermal Conductivity | 20 – 40 | W/m·K |
| Coefficient of Thermal Expansion | 10 – 13 ×10⁻⁶ | /°C |
| Yield Ratio (YS/UTS) | 0.45 – 0.70 | – |
| Poisson’s Ratio | 0.28 – 0.30 | – |
| Brinell Hardness Range | 200 – 600 | HB (depending on part & material) |
| Surface Finish | Polished rollers for smooth, burr-free tube expansion | – |
| Operation Type | Hand, Pneumatic, Electric, or Hydraulic driven | – |
| Operating Temperature Range | -20 to 450 | °C (continuous operation, depending on material) |
| Pressure Rating (Tube Expansion) | Suitable for tubes in heat exchangers & dairy equipment up to 150 bar | Industry Practice |
Chemical Composition
| Element | SS 304 (%) | SS 304L (%) | SS 316 (%) | SS 316L (%) |
|---|---|---|---|---|
| Carbon (C) | ≤ 0.08 | ≤ 0.03 | ≤ 0.08 | ≤ 0.03 |
| Manganese (Mn) | ≤ 2.00 | ≤ 2.00 | ≤ 2.00 | ≤ 2.00 |
| Silicon (Si) | ≤ 1.00 | ≤ 1.00 | ≤ 1.00 | ≤ 1.00 |
| Phosphorus (P) | ≤ 0.045 | ≤ 0.045 | ≤ 0.045 | ≤ 0.045 |
| Sulfur (S) | ≤ 0.030 | ≤ 0.030 | ≤ 0.030 | ≤ 0.030 |
| Chromium (Cr) | 18.0 – 20.0 | 18.0 – 20.0 | 16.0 – 18.0 | 16.0 – 18.0 |
| Nickel (Ni) | 8.0 – 10.5 | 8.0 – 12.0 | 10.0 – 14.0 | 10.0 – 14.0 |
| Molybdenum (Mo) | — | — | 2.0 – 3.0 | 2.0 – 3.0 |
| Iron (Fe) | Balance | Balance | Balance | Balance |
Applications of Dairy Tube Expander
Dairy & Milk Processing
Units
Beverage Plants
Pharmaceutical
Food Processing &
Edible Oil Units
Chemical & Enzyme
Production
Dairy R&D and Quality
Testing Labs
Do you have questions?
What is the purpose of a Dairy Tube Expander?
Is tube expansion better than welding?
Are these expanders reusable?
Can I use this for non-dairy applications?
