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What are the different types of Stainless Steel Sanitary Fittings/Dairy Fittings and their applications?
The food and dairy industries require materials that won’t contaminate the product or harm human health. Stainless steel sanitary fittings generally use grades 304 or 316 and have a polished surface, rounded corners, and easy-to-sanitise designs.
Buyers can order these fittings in various types, like bevel seats, tees, unions, reducers, and elbows:
The internationally accepted standard – in this case, ASTM A270 SS dairy pipe fittings – dictates ½ to 12-inch sizes.
Table of Content
Dimensions Chart of ASTM A270 SS Dairy Pipe Fittings
| 3A ( SS sanitary fittings standards) | ISO | DIN (11850) | |||||
| Size | t | O.D. | t | O.D. | Size | t | O.D. |
| 12 | DN10 | 12 | |||||
| 17.2 | 15 | 1 | 18 | ||||
| 1/2″ | 12.7 | 21.3 | 20 | 22 | |||
| 1″ | 1.25
1.65 |
25.4 | 1.2 | 25 | 25 | 1.5 | 28 |
| 1.2 | 33.7 | 32 | 1.5 | 34 | |||
| 2 1/2″ | 1.65 | 63.5 | 1.6 | 63.5 | |||
| 1 1/2″ | 1.25
1.65 |
38.1 | 1.2 | 38 | |||
| 1.2 | 40 | 40 | 1.5 | 40 | |||
| 2″ | 1.65 | 50.8 | 1.2 | 51 | 50 | 1.5 | 52 |
| 1.6 | 70 | 65 | 2 | 70 | |||
| 3″ | 1.65 | 76.2 | 1.6 | 76.1 | |||
| 2 | 88.9 | 80 | 2 | 85 | |||
| 5″ | 2 | 139.7 | |||||
| 4″ | 1.65 | 101.6 | 2 | 101.6 | 100 | 2 | 104 |
| 2 | 114.3 | 125 | 2 | 129 | |||
| 6″ | 2 | 168.3 | 150 | 2 | 154 | ||
| 10″ | 2.6 | 273 | |||||
| 8″ | 2.6 | 219.1 | |||||
| 12″ | 2.6 | 323.9 | |||||
| 16″ | 3.2 | 406.4 | |||||
| 14″ | 2.6 | 355.6 | |||||
Specification of Stainless Steel Sanitary Fittings
SS Tri Clamp Fittings Delivery Schedules
| Country Name | Egypt | Israel | Saudi Arabia | Qatar | Oman |
|---|---|---|---|---|---|
| Delivery Time | 11-13 | 12-15 | 8-10 Days | 8-10 | 7-8 |
How do you choose appropriate Stainless Steel Sanitary Fittings/Dairy Fittings for a specific food application?
Considering the priorities of the application – dairy, brewery, winery, etc. – helps customers choose appropriate SS sanitary fittings.
Note that sanitary and SS dairy fittings are similar, but for their certificates and additional design/testing nuances.
Mechanical Properties of SS 316 Dairy Pipe Fittings
| Grade | Density | Melting points | Tensile strength | Yield strength(0.2% offset) | Elongation |
| SS | 8.0g/ cm3 | 1400°C (255°F) | PSI-75000, MPa-515 | PSi-30000, MPa-205 | 35% |
Which comprehensive tests are performed on dairy sanitary and dairy pipe fittings ?
Standard quality checks on SS 304 sanitary fittings use a spectrometer or an analyser gun to verify the chemical composition. They must get produced with tight tolerances (usually set to +/- .005″ and a maximum 12.5% variation for the wall thickness).
Stainless steel tri clamp fittings also undergo visual inspection to detect surface imperfections. They also get evaluated for intergranular corrosion (especially for pharmaceuticals), flattening, tensile strength, and non-destructive hydrostatic examination.
The Mill Test Report for stainless sanitary fittings contains traceable heat lot numbers for the buyers’ reference.
Types of SS Dairy Fitting
Stainless steel 304 dairy pipe fittings
SS 316 milk pipe fittings
Stainless steel tri-clamp fittings
SS TRI clover fittings
Pressure Ratings of Stainless Steel 316 Dairy Fittings
| SS 304 sanitary fittings pressure ratings (PSI) | |||||||
|---|---|---|---|---|---|---|---|
| Single hinge (13MHM) | Double hinge (13MHHM-DP) | High pressure (13MHP) | |||||
| Size | 250F | 70F | 250F | 70F | 70F | Max torque | 250F |
| 1.5 in. | 250 | 500 | 250 | 500 | 1500 | 130 In LBf | 1200 |
| 3/4 in. | 1200 | 1500 | 1200 | 1500 | 1500 | 130 In LBf | 1200 |
| 2.5 in. | 200 | 400 | 200 | 400 | 1000 | 130 In LBf | 800 |
| 2 in. | 250 | 450 | 250 | 450 | 1000 | 130 In LBf | 800 |
| 3 in. | 150 | 350 | 150 | 350 | 1000 | 130 In LBf | 800 |
| 6 in. | 75 | 150 | 300 | 200 In LBf | 200 | ||
| 4 in. | 125 | 200 | 125 | 200 | 800 | 200 In LBf | 600 |
| 8 in. | 50 | 100 | 250 | 200 In LBf | 150 | ||
| 12 in. | 25 | 30 | 150 | 200 In LBf | 100 | ||
| 10 in. | 30 | 40 | 200 | 200 In LBf | 125 | ||
Equivalent Properties of SS 304 Sanitube Fitting
| Standard | Werkstoff nr. | UNS | JIS | BS | GOST | AFNOR | EN |
| SS | 1.4301 | S30400 | SUS 304 | 304S31 | 08X18H10 | Z7CN18-09 | X5CrNi18-10 |
Chemical Composition of Stainless 304 Sanitary Fittings
| C | Mn | Si | P | S | Cr | Ni |
|---|---|---|---|---|---|---|
| 0.08 max | 2 max | 0.75 Max | 0.045 max | 0.030 max | 18 - 20 | 8 - 11 |
Applications of Stainless Steel Tri Clamp Fittings
Frequently Asked Questions
1. What are the different types of sanitary fitting?
2. What is the best material for sanitary fittings?
→ Stainless steel
3. What is the finish of sanitary fittings?
→ 32 Ra
4. What is the type of pipe used in sanitary installations?
→ PVC pipe