Stainless Steel 316 Flanges Manufacturer in India
SS 316 stainless steel refers to a type of austenitic stainless steel that contains molybdenum, which has been created with high levels of corrosion resistance, particularly in the presence of chlorides and other chemically hostile conditions. Incorporation of molybdenum improves resistance to pitting, crevice corrosion, and chemical attack, which can make SS 316 the best product against marine usage, chemical usage, pharmaceutical usage, and offshore usage. The SS 316 flanges are common in piping systems where the resistance to corrosion, mechanical strength, and longevity are very important. These flanges are efficient in corrosive and high-pressure as well as in high-moisture conditions; their structural integrity is ensured, and they prevent leakage in piping systems in industries.
Table of Contents
- What Are SS 316 Flanges?
- Specification Of A182 F316 Slip-On Flange
- Chemical Composition of SS 316 Flanges
- SS DIN 1.4401 Nippolet Flanges Mechanical Properties
- ASME SA182 SS 316 Flange Sizes Chart
- Weight Chart of 150# ANSI SS 316 Flanges
- Pressure rating chart of SS UNS S31600 WNRF Flanges
- Types of SS 316 Flanges
- Application uses of SS 316 Flanges
- Price Chart of Stainless Steel 316 Flanges
- Frequently Asked Questions (FAQ)
What Are SS 316 Flanges?
SS 316 Flanges SS 316 Flanges are fabricated as per ASTM A182 F316 specification; they are forged and rolled stainless steel pipe connectors. In this grade, there is molybdenum (Mo), and this enhances the corrosion resistance to a great extent when compared to SS 304, especially with respect to chlorides, acids, and salty conditions. The SS 316 flanges are developed to be used where a high level of resistance to chemical corrosion, exposure to moisture, and exposure to aggressive industrial media is required. They find extensive application in chemical facilities, seawater systems, pharmaceutical piping systems, desalination facilities, offshore platforms, and food processing systems, which require durability and corrosion resistance.
Specification Of A182 F316 Slip-On Flange
| Category | Specification Details |
| Material Specifications | ASTM A182 / ASME SA182 |
| Standard Flange Types | ANSI, ASME, BS, DIN, EN, etc. |
| Size Range | 1/2? (15 NB) to 48? (1200 NB) |
| Pressure Ratings (Class) | 150#, 300#, 600#, 900#, 1500#, 2500# |
| Pressure Ratings (PN) | PN6, PN10, PN16, PN25, PN40, PN64, etc. |
| Manufacturing Standards | ANSI/ASME B16.5, B16.48, B 16.47 Series A & B, BS 10, BS4504, EN-1092, DIN, etc. |
Chemical Composition of SS 316 Flanges
The table below gives the information about the chemical composition of SS 316 Flanges
| Grade | C | Mn | Si | P | S | Cr | Mo | Ni | N |
| SS 316 | 0.08 max | 2.0 max | 1.0 max | 0.045 max | 0.030 max | 16.0 - 18.0 | 2.0 - 3.0 | 11.0 - 14.0 | 67.845 min |
SS DIN 1.4401 Nippolet Flanges Mechanical Properties
The mechanical properties consist of many things about the material, and the SS 316 Flanges detailed information is given below.
| Grade | Density | Melting Point | Tensile Strength (min) | Yield Strength (0.2% Offset) | Elongation (min) |
| SS 316 | 8.0 g/cm- | 1400 -C (2550 -F) | 75,000 Psi / 515 MPa | 30,000 Psi / 205 MPa | 35% |
ASME SA182 SS 316 Flange Sizes Chart
The size chart helps you to get a precise flanges acooring to your requirements, and the detailed information about this is listed below.
| NPS | OD (O) | Thick (Q) | RF (R) | Hub Base (X) | LTH (Y) Weld | LTH (Y) Slip | Bore (B) Slip | Bore (B) Lap | Hub Bevel (W) | Fillet (r) | Socket Depth (Z) |
| 1/2 | 3-1/2 | 7/16 | 1-3/8 | 1-3/16 | 1-7/8 | 5/8 | 0.88 | 0.90 | 0.84 | 1/8 | 3/8 |
| 3/4 | 3-7/8 | 1/2 | 1-11/16 | 1-1/2 | 2-1/16 | 5/8 | 1.09 | 1.11 | 1.05 | 1/8 | 7/16 |
| 1 | 4-1/4 | 9/16 | 2 | 1-15/16 | 2-3/16 | 11/16 | 1.36 | 1.38 | 1.32 | 1/8 | 1/2 |
| 1-1/4 | 4-5/8 | 5/8 | 2-1/2 | 2-5/16 | 2-1/4 | 13/16 | 1.70 | 1.72 | 1.66 | 3/16 | 9/16 |
| 1-1/2 | 5 | 11/16 | 2-7/8 | 2-9/16 | 2-7/16 | 7/8 | 1.95 | 1.97 | 1.90 | 1/4 | 5/8 |
| 2 | 6 | 3/4 | 3-5/8 | 3-1/16 | 2-1/2 | 1 | 2.44 | 2.46 | 2.38 | 5/16 | 11/16 |
| 2-1/2 | 7 | 7/8 | 4-1/8 | 3-9/16 | 2-3/4 | 1-1/8 | 2.94 | 2.97 | 2.88 | 5/16 | 3/4 |
| 3 | 7-1/2 | 15/16 | 5 | 4-1/4 | 2-3/4 | 1-3/16 | 3.57 | 3.60 | 3.50 | 3/8 | 13/16 |
| 3-1/2 | 8-1/2 | 15/16 | 5-1/2 | 4-13/16 | 2-13/16 | 1-1/4 | 4.07 | 4.10 | 4.00 | 3/8 | 7/8 |
| 4 | 9 | 15/16 | 6-3/16 | 5-5/16 | 3 | 1-5/16 | 4.57 | 4.60 | 4.50 | 7/16 | 15/16 |
| 5 | 10 | 15/16 | 7-5/16 | 6-7/16 | 3-1/2 | 1-7/16 | 5.66 | 5.69 | 5.56 | 7/16 | 15/16 |
| 6 | 11 | 1 | 8-1/2 | 7-9/16 | 3-1/2 | 1-9/16 | 6.72 | 6.75 | 6.63 | 1/2 | 1-1/16 |
| 8 | 13-1/2 | 1-1/8 | 10-5/8 | 9-11/16 | 4 | 1-3/4 | 8.72 | 8.75 | 8.63 | 1/2 | 1-1/4 |
| 10 | 16 | 1-3/16 | 12-3/4 | 12 | 4 | 1-15/16 | 10.88 | 10.92 | 10.75 | 1/2 | 1-5/16 |
| 12 | 19 | 1-1/4 | 15 | 14-3/8 | 4-1/2 | 2-3/16 | 12.88 | 12.92 | 12.75 | 1/2 | 1-9/16 |
| 14 | 21 | 1-3/8 | 16-1/4 | 15-3/4 | 5 | 2-1/4 | 14.14 | 14.18 | 14.00 | 1/2 | 1-5/8 |
| 16 | 23-1/2 | 1-7/16 | 18-1/2 | 18 | 5 | 2-1/2 | 16.16 | 16.19 | 16.00 | 1/2 | 1-3/4 |
| 18 | 25 | 1-9/16 | 21 | 19-7/8 | 5-1/2 | 2-11/16 | 18.18 | 18.20 | 18.00 | 1/2 | 1-15/16 |
| 20 | 27-1/2 | 1-11/16 | 23 | 22 | 5-11/16 | 2-7/8 | 20.20 | 20.25 | 20.00 | 1/2 | 2-1/8 |
| 24 | 32 | 1-7/8 | 27-1/4 | 26-1/8 | 6 | 3-1/4 | 24.25 | 24.25 | 24.00 | 1/2 | 2-1/2 |
Weight Chart of 150# ANSI SS 316 Flanges
The weight chart of the SS 316 Flanges is given below, that provide the detailed information about the different weights of this material.
| Pipe Size (NPS) | DN | O.D. (O) | Thk (C) | Hub Dia (X) | RF (G) | LTH (Y) | Bolt Circle (BC) | Hole Dia (BH) | No. Bolts (BN) | Bolt Dia (BD) | KG | LB |
| 1/2" | 15 | 89.0 | 11.2 | 30.2 | 35.1 | 15.7 | 60.5 | 15.8 | 4 | 1/2" | 0.4 | 0.9 |
| 3/4" | 20 | 98.5 | 12.7 | 38.1 | 42.9 | 15.7 | 69.9 | 15.8 | 4 | 1/2" | 0.7 | 1.5 |
| 1" | 25 | 108.0 | 14.2 | 49.3 | 50.8 | 17.5 | 79.3 | 15.8 | 4 | 1/2" | 0.8 | 1.8 |
| 1-1/4" | 32 | 117.5 | 15.7 | 58.7 | 63.5 | 20.6 | 88.9 | 15.8 | 4 | 1/2" | 1.2 | 2.6 |
| 1-1/2" | 40 | 127.0 | 17.5 | 65.0 | 73.2 | 22.4 | 98.6 | 15.8 | 4 | 1/2" | 1.5 | 3.3 |
| 2" | 50 | 152.5 | 19.1 | 77.7 | 91.9 | 25.4 | 120.7 | 19.1 | 4 | 5/8" | 2.3 | 5.1 |
| 2-1/2" | 65 | 178.0 | 22.4 | 90.4 | 104.6 | 28.4 | 139.7 | 19.1 | 4 | 5/8" | 3.7 | 8.1 |
| 3" | 80 | 190.5 | 23.9 | 108.0 | 127.0 | 30.2 | 152.4 | 19.1 | 4 | 5/8" | 4.1 | 9.0 |
| 3-1/2" | 90 | 216.0 | 23.9 | 122.2 | 139.7 | 31.8 | 177.8 | 19.1 | 8 | 5/8" | 5.1 | 11.2 |
| 4" | 100 | 228.5 | 23.9 | 134.9 | 157.2 | 33.3 | 190.5 | 19.1 | 8 | 5/8" | 5.9 | 13.0 |
| 5" | 125 | 254.0 | 23.9 | 163.6 | 185.7 | 36.6 | 215.9 | 22.4 | 8 | 3/4" | 7.0 | 15.4 |
| 6" | 150 | 279.5 | 25.4 | 192.0 | 215.9 | 39.6 | 241.3 | 22.4 | 8 | 3/4" | 8.4 | 18.5 |
| 8" | 200 | 343.0 | 28.4 | 246.1 | 269.7 | 44.5 | 298.5 | 22.4 | 8 | 3/4" | 13.0 | 28.6 |
| 10" | 250 | 406.5 | 30.2 | 304.8 | 323.9 | 49.3 | 362.0 | 25.4 | 12 | 7/8" | 18.0 | 39.5 |
| 12" | 300 | 482.5 | 31.8 | 365.3 | 381.0 | 55.6 | 431.8 | 25.4 | 12 | 7/8" | 29.0 | 64.0 |
| 14" | 350 | 533.5 | 35.1 | 400.1 | 412.8 | 57.2 | 476.3 | 28.5 | 12 | 1" | 39.0 | 86.0 |
| 16" | 400 | 597.0 | 36.6 | 457.2 | 469.9 | 63.5 | 539.8 | 28.5 | 16 | 1" | 47.0 | 103.0 |
| 18" | 450 | 635.0 | 39.6 | 505.0 | 533.4 | 68.3 | 577.9 | 31.8 | 16 | 1 1/8" | 57.0 | 126.0 |
| 20" | 500 | 698.5 | 42.9 | 558.8 | 584.2 | 73.2 | 635.0 | 31.8 | 20 | 1 1/8" | 76.0 | 167.0 |
| 24" | 600 | 813.0 | 47.8 | 663.4 | 692.2 | 82.6 | 749.3 | 35.1 | 20 | 1 1/4" | 97.0 | 214.0 |
Pressure rating chart of SS UNS S31600 WNRF Flanges
The chart provides detailed information about the pressure rating of the SS 316 Flanges.
| Temp (-F) | 150# | 300# | 400# | 600# | 900# | 1500# | 2500# |
| -20 to 100 | 275 | 720 | 960 | 1440 | 2160 | 3600 | 6000 |
| 200 | 230 | 600 | 800 | 1200 | 1800 | 3000 | 5000 |
| 300 | 205 | 540 | 720 | 1080 | 1620 | 2700 | 4500 |
| 400 | 190 | 495 | 660 | 995 | 1490 | 2485 | 4140 |
| 500 | 170 | 465 | 620 | 930 | 1395 | 2330 | 3880 |
| 600 | 140 | 435 | 580 | 875 | 1310 | 2185 | 3640 |
| 650 | 125 | 430 | 575 | 860 | 1290 | 2150 | 3580 |
| 700 | 110 | 425 | 565 | 850 | 1275 | 2125 | 3540 |
| 750 | 95 | 415 | 555 | 830 | 1245 | 2075 | 3460 |
| 800 | 80 | 405 | 540 | 805 | 1210 | 2015 | 3360 |
| 850 | 65 | 395 | 530 | 790 | 1190 | 1980 | 3300 |
| 900 | 50 | 390 | 520 | 780 | 1165 | 1945 | 3240 |
| 950 | 35 | 380 | 510 | 765 | 1145 | 1910 | 3180 |
| 1000 | 20 | 320 | 430 | 640 | 965 | 1605 | 2675 |
| 1050 | 20 | 310 | 410 | 615 | 925 | 1545 | 2570 |
| 1100 | 20 | 255 | 345 | 515 | 770 | 1285 | 2145 |
| 1150 | 20 | 200 | 265 | 400 | 595 | 995 | 1655 |
| 1200 | 20 | 155 | 205 | 310 | 465 | 770 | 1285 |
| 1250 | 20 | 115 | 150 | 225 | 340 | 565 | 945 |
| 1300 | 20 | 85 | 115 | 170 | 255 | 430 | 715 |
| 1350 | 20 | 60 | 80 | 125 | 185 | 310 | 515 |
| 1400 | 20 | 50 | 65 | 95 | 145 | 240 | 400 |
| 1450 | 15 | 35 | 45 | 70 | 105 | 170 | 285 |
| 1500 | 10 | 25 | 35 | 55 | 80 | 135 | 230 |
Types of SS 316 Flanges
Flanges SS 316 are used in those systems that require high levels of corrosion resistance, durability, and extended operation, particularly in chemical, marine, and moist systems.
Weld Neck Flanges (WNRF):
They are constructed with tapered hubs, which offer good structural support, and the stress is well distributed, thus they are compatible with high-pressure and corrosion-prone pipelines.
Slip-On Flanges (SORF):
These flanges are designed to fit and align very fast and are used in moderate-pressure systems where ease of installation and maintenance may be a consideration.
Blind Flanges (BLRF):
Sealed to either permanently or temporarily close openings in pipelines and equipment, which offer safe isolation during maintenance, inspection, or system shutdown.
Socket Weld Flanges (SWRF):
These flanges are most appropriate in the small-bore, high-pressure piping, and they guarantee effective joints and leak-free functionality in the small piping installations.
Threaded Flanges:
Applied to low-pressure or non-critical systems in which welding is not required, easy to install and remove.
Lap Joint Flanges:
They are normally used in systems where the dismantling, cleaning, or inspection is repeated, and they provide flexibility and straightforward realignment of piping networks.
Application uses of SS 316 Flanges
The SS 316 Flanges have been extensively utilized in industries that demand a high level of corrosion resistance, strength, and all-time performance in high temperatures or other tough environments.
- Marine: The industry includes marine-related operations like shipbuilding, ship repair, docking, and various other marine services.
- Desalination Plants: It is used in high-chloride conditions where long service life and corrosion resistance are a priority.
- Wastewater and sewage treatment plants: Ideal in the treatment or handling of the aggressive chemicals, moisture and corrosive gases in pipelines.
- Fertilizer Industries: Applied in chemical transfer lines and processing systems that are exposed to corrosive compounds.
- Pulp & Paper Industries: Appropriate in piping systems that transport chemicals, steam and high-temperature fluids.
- Mining and Mineral Processing Industries: Uses Slurry pipelines and processing system applications where abrasion and corrosion coexist.
- Biotechnology Industries: Applied in clean piping systems that need a level of hygiene, corrosion and control of contamination.
- Cooling & HVAC Systems: Fitted in chilled water and cooling circuits that are susceptible to moisture and chemical additives.
- Automobile and Heavy Engineering Industries: Applied in exhaust systems, fuel processing lines and industrial fabrication units.
- Renewable Energy Industry: Used in solar thermal facilities, bioenergy facilities and hydrogen processing pipelines.
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Price Chart of Stainless Steel 316 Flanges
The price of the SS 316 Flanges depends on many factors such as size, material, and other things. The table below provides the estimated cost of this material.
| Product Description | Price in India (INR) | Price in UAE (AED) | Pricing Unit |
| Weld Neck (SS 316) Flanges | Rs. 1,087 | AED 56.29 | Per Piece |
| ASTM A182 316 SS Plate Flange | Rs. 522 | AED 27.03 | Per Piece |
| Standard SS 316 Flanges | Rs. 487 | AED 25.22 | Per Piece |
| 316 Stainless Steel Flanges | Rs. 411 | AED 21.28 | Per Kg |
Frequently Asked Questions (FAQ)
SS 316 flanges are stronger against corrosion than SS 304 because they have molybdenum, making them ideal for salty or harsh environments.
Yes, they resist rust, pitting, and corrosion even in tough chemical or marine conditions.
The Stainless steel 316 flanges come in different types, such as Weld Neck, Slip-On, Blind, Socket Weld, Threaded, and Lap Joint flanges.
The SS 316 Flanges can easily handle the temperature around 870-C (1600-F).
They offer excellent durability, resist corrosion, perform well at high temperatures, and are perfect for chemical, marine, and industrial applications.
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