Dairy Blind Nut
What is a Dairy Blind Nut?
A Dairy Blind Nut is a hygienic fastening component used to seal off unused ports or ends of dairy and process piping systems. It allows for secure closure while ensuring no contamination enters the system. These nuts are often paired with ferrules or end caps and are essential in temporary shutdowns or when future expansion is anticipated.
Asaid Steel Industries offers high-quality Dairy Blind Nuts made from food-grade stainless steel for leak-free, sanitary operation in dairy, beverage, and pharmaceutical applications.
Key Features
Strong
Grip
Sanitary
Design
Easy to
Clean
Standards
Compliant
Corrosion
Resistant
Specifications
| Specification Category | Parameter / Feature | Details / Options |
|---|---|---|
| Size Range | Nominal Size | ½” to 6″ (custom sizes available) |
| Pressure Ratings | ANSI / ASME Class | Class 150, 300, 600, 900, 1500, 2500 |
| PN Ratings | PN6, PN10, PN16, PN25, PN40, PN64 | |
| Product Types | Dairy Blind Nut | Full, Reducing Blind Nut |
| Material Options | Carbon Steel | ASTM A216 WCB |
| Stainless Steel | ASTM A351 CF8, CF8M, CF3, CF3M | |
| Alloy Steel | ASTM A351 CK3MCuN, CK20MCuN | |
| Nickel Alloy | Inconel, Monel | |
| Standards & Certifications | ASTM | ASTM A351, ASTM A182 |
| ASME / ANSI | ASME B16.11, ASME B16.5 | |
| MSS | MSS SP-79, MSS SP-83 | |
| European Standards | EN 10241, EN 10226 | |
| Certifications | ISO 9001, PED 2014/68/EU, NACE MR0175, CE Marked | |
| Design Features | Nut Type | Full Blind Nut, Reducing Blind Nut |
| Wall Thickness | Schedule 40, 80, 160 (As per ASTM/ASME standards) | |
| End Connections | Female Threaded, Flanged | |
| Pressure Class | 2000#, 3000#, 6000#, 9000# | |
| Tolerance | Thread Tolerance | As per ASME B1.20.1 / ISO 7-1 |
| Coating & Surface Finish | Anti-Corrosion Coating | Passivation, Nickel Plating |
| Surface Finish | Mill Finish, Polished, Bead Blasted | |
| Testing & Inspection | Pressure Testing | Hydrostatic, Pneumatic |
| Non-Destructive Testing | Dye Penetrant (DPT), Magnetic Particle (MPI) | |
| Destructive Testing | Tensile, Hardness, Torque Test |
Dimensions
| Fitting Type | Nominal Size (NPS) | Outside Diameter (OD) | Thread Length (T) | Overall Length (L) | Weight per Piece |
|---|---|---|---|---|---|
| Dairy Blind Nut (Full) | ½” | 21.3 mm | 15 mm | 30 mm | 180g |
| ¾” | 26.7 mm | 18 mm | 35 mm | 220g | |
| 1″ | 33.4 mm | 20 mm | 40 mm | 300g | |
| 1½” | 48.3 mm | 22 mm | 50 mm | 450g | |
| 2″ | 60.3 mm | 25 mm | 60 mm | 650g | |
| 3″ | 88.9 mm | 30 mm | 75 mm | 1.0kg | |
| 4″ | 114.3 mm | 35 mm | 85 mm | 1.5kg | |
| Dairy Blind Nut (Reducing) | 1″ × ½” | 33.4 / 21.3 mm | 20 mm | 45 mm | 250g |
| 2″ × 1½” | 60.3 / 48.3 mm | 25 mm | 60 mm | 900g |
Notes:
- Nominal Size & OD: Represents the pipe size and outside diameter, ensuring compatibility with the system’s requirements for a secure fit.
- Thread Length (T): Refers to the length of the threaded portion required for a tight and leak-proof connection.
- Overall Length (L): Indicates the total length of the fitting, ensuring proper fitment in the pipeline system.
- Fitting Type: Full Blind Nuts connect pipes of the same diameter, while Reducing Blind Nuts connect pipes of different sizes.
- Weight per Piece: Assists in handling, logistics, and installation, providing a sense of shipping and installation considerations.
Mechanical Properties
| Property | Value | Unit / Standard |
|---|---|---|
| Tensile Strength | 485 – 750 | MPa (Carbon Steel, Stainless Steel, Alloy Steel, Nickel Alloys) |
| Yield Strength | 170 – 450 | MPa |
| Hardness | 120 – 200 | HB (Brinell) |
| Elongation | ≥ 20 – 30 | % |
| Density | 7.8 – 8.0 | g/cm³ (Carbon Steel), 7.9 – 8.0 g/cm³ (Stainless Steel) |
| Impact Toughness | ≥ 27 – 70 | J (Charpy, grade-dependent) |
| Modulus of Elasticity (E) | ~200 | GPa |
| Fatigue Strength | 250 – 450 | MPa |
| Corrosion Resistance | Good to Excellent | (SS > CS > Alloy Steel > Nickel Alloys) |
| Thermal Conductivity | 15 – 50 | W/m·K |
| Coefficient of Thermal Expansion | 11 – 17 ×10⁻⁶ | /°C |
| Yield Ratio (YS/UTS) | 0.40 – 0.65 | – |
| Poisson’s Ratio | 0.27 – 0.30 | – |
| Brinell Hardness Range | 120 – 200 | HB |
| Surface Finish | Mill Finish, Polished, Bead Blasted | – |
| End Connections | Female Threaded, Flanged | – |
| Operating Temperature Range | -46 to 600 | °C (material-dependent) |
| Pressure Rating | Class 150, 300, 600, 900, 1500, 2500 | ASME B16.11 |
Applications of Dairy Blind Nuts
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 use of a Dairy Blind Nut?
Can Dairy Blind Nuts be reused?
How do I choose the right size Dairy Blind Nut?
Are these compatible with DIN or ISO ferrules?
