Stainless Steel 304L Flanges Manufacturer in India
SS 304L is a low-carbon formulation of 304 stainless steel, which is actually designed to provide better corrosive resistance in welded products. Its lower carbon content helps to reduce the possibility of intergranular corrosion, hence it is one of the best piping systems to use where welding should be done. This grade is very durable and reliable, even in harsh conditions such as chemical or high-temperature environments. Mostly used in the chemical processing and food and beverage manufacturing processes, as well as in water treatment, SS 304L flanges are leak-free, offer structural strength, and are easy to maintain. It can be used in contemporary piping networks because it is stronger, corrosion-resistant, and easily weldable.
Table of Contents
- What Are SS 304L Flanges?
- Specification of SS 304L Flanges
- SS 304L Flanges Chemical Composition Standard
- SS DIN 1.4301 Lap Joint Mechanical properties
- Size Chart of SS 304L SORF Flange
- ANSI B16.5 SS 304L flange Weight Chart
- Pressure rating chart of the SS 304L Flanges
- Types of SS 304L Flanges
- Applications & industries use of SS 304L Flanges
- Advantages of SS 304L flanges
- SS DIN 1.4306 Screwed Flanges Price
- Frequently Asked Questions (FAQ)
What Are SS 304L Flanges?
SS 304L Flanges are forged or rolled pipe connectors made of stainless steel that offer reliable connections in industrial piping systems. These flanges have been manufactured to rigorous standards of ASTM A182 F304L which guarantee uniformity in quality, dimensions and mechanical integrity. The 304L has an L in the 304L that implies low carbon level of 0.03 percent or less and this lowers the chances of intergranular corrosion of the welded connectors significantly and hence would be very suitable in a system that needs welding. The SS 304L Flanges find a wide application in chemical processing, food and beverage, and water treatment industries, as they have a good corrosion resistance, high toughness and can withstand moderately high temperatures and pressure. Their accurate construction makes them leak-free, have long lifespan and they are easily installed in the harsh piping networks.
Specification of SS 304L Flanges
| Specification Category | Consolidated Details |
| Specifications List | ASTM A182 / ASME SA182 |
| Standard Flange | ANSI, ASME, BS, DIN, EN etc. |
| Size Chart | 1/2? (15 NB) to 48? (1200 NB) |
| Class / Pressure Rating | 150#, 300#, 600#, 900#, 1500#, 2500#, PN6, PN10, PN16, PN25, PN40, PN64 etc. |
| ASTM / Manufacturing Standards | ANSI/ASME B16.5, B16.48, BS4504, B 16.47 Series A & B, BS 10, EN-1092, DIN, etc. |
SS 304L Flanges Chemical Composition Standard
Below is given the detailed table of the chemical composition of SS 304L flanges, and for more information, contact us.
| Grade | C | Mn | Si | P | S | Cr | Mo | Ni | N |
| SS 304L | 0.035 max | 2.0 max | 1.0 max | 0.045 max | 0.03 max | 18 - 20 | - | 8 - 13 | - |
SS DIN 1.4301 Lap Joint Mechanical properties
The mechanical properties of SS 30L flanges help you to understand the tensile strength and other things that help you to choose the right material according to your needs.
| Grade | Density | Melting Point | Tensile Strength | Yield Strength (0.2% Offset) | Elongation |
| SS 304L | 8.0 g/cm- | 1400 -C (2550 -F) | 75,000 Psi / 515 MPa | 30,000 Psi / 205 MPa | 35% |
Size Chart of SS 304L SORF Flange
The size chart helps you to choose the right size of flanges for your requirements.
| NPS | OD (O) | Thick (Q) | RF (R) | Hub Base (X) | LTH (Y) Weld | LTH (Y) Slip | Bore (B) Weld | Bore (B) Slip | 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 | 0.62 | 0.88 | 0.84 | 1/8 | 3/8 |
| 3/4 | 3-7/8 | 1/2 | 1-11/16 | 1-1/2 | 2-1/16 | 5/8 | 0.82 | 1.09 | 1.05 | 1/8 | 7/16 |
| 1 | 4-1/4 | 9/16 | 2 | 1-15/16 | 2-3/16 | 11/16 | 1.05 | 1.36 | 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 | 1.38 | 1.70 | 1.66 | 3/16 | 9/16 |
| 1-1/2 | 5 | 11/16 | 2-7/8 | 2-9/16 | 2-4/16 | 7/8 | 1.61 | 1.95 | 1.90 | 1/4 | 5/8 |
| 2 | 6 | 3/4 | 3-5/8 | 3-1/16 | 2-1/2 | 1 | 2.07 | 2.44 | 2.38 | 5/16 | 11/16 |
| 2-1/2 | 7 | 7/8 | 4-1/8 | 3-9/16 | 2-3/4 | 1-1/8 | 2.47 | 2.94 | 2.88 | 5/16 | 3/4 |
| 3 | 7-1/2 | 15/16 | 5 | 4-1/4 | 2-3/4 | 1-3/16 | 3.07 | 3.57 | 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 | 3.55 | 4.07 | 4.00 | 3/8 | 7/8 |
| 4 | 9 | 15/16 | 6-3/16 | 5-5/16 | 3 | 1-5/16 | 4.03 | 4.57 | 4.50 | 7/16 | 15/16 |
| 5 | 10 | 15/16 | 7-5/16 | 6-7/16 | 3-1/2 | 1-7/16 | 5.05 | 5.66 | 5.56 | 7/16 | 15/16 |
| 6 | 11 | 1 | 8-1/2 | 7-9/16 | 3-1/2 | 1-9/16 | 6.07 | 6.72 | 6.63 | 1/2 | 1-1/16 |
| 8 | 13-1/2 | 1-1/8 | 10-5/8 | 9-11/16 | 4 | 1-3/4 | 7.98 | 8.72 | 8.63 | 1/2 | 1-1/4 |
| 10 | 16 | 1-3/16 | 12-3/4 | 12 | 4 | 1-15/16 | 10.02 | 10.88 | 10.75 | 1/2 | 1-5/16 |
| 12 | 19 | 1-1/4 | 15 | 14-3/8 | 4-1/2 | 2-3/16 | 12.00 | 12.88 | 12.75 | 1/2 | 1-9/16 |
| 14 | 21 | 1-3/8 | 16-1/4 | 15-3/4 | 5 | 2-1/4 | 13.25 | 14.14 | 14.00 | 1/2 | 1-5/8 |
| 16 | 23-1/2 | 1-7/16 | 18-1/2 | 18 | 5 | 2-1/2 | 15.25 | 16.16 | 16.00 | 1/2 | 1-3/4 |
| 18 | 25 | 1-9/16 | 21 | 19-7/8 | 5-1/2 | 2-11/16 | 17.25 | 18.18 | 18.00 | 1/2 | 1-15/16 |
| 20 | 27-1/2 | 1-11/16 | 23 | 22 | 5-11/16 | 2-7/8 | 19.25 | 20.20 | 20.00 | 1/2 | 2-1/8 |
| 24 | 32 | 1-7/8 | 27-1/4 | 26-1/8 | 6 | 3-1/4 | 23.25 | 24.25 | 24.00 | 1/2 | 2-1/2 |
ANSI B16.5 SS 304L flange Weight Chart
The weight chart of the SS 304L flanges comes with different sizes and weights. So the chart below gives you the detailed knowledge of their weights.
| NPS (inch) | DN | O.D. (O) | Thk (C) | Hub (X) | RF (G) | Hub Lth (Y) | Bolt Circle (BC) | Hole Dia (BH) | No. of Bolts | Bolt Dia (inch) | Weight (KG) | Weight (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 the SS 304L Flanges
The pressure rating chart given below gives you detailed information about the SS 304L Flanges.
| Temperature -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 304L Flanges
Metinox Overseas has a wide variety of SS 304L Flanges that can be used to fulfill the varying pressure, temperature, and piping connection specifications.
Weld Neck Flanges (WNRF):
Such flanges are butt-welded to the pipe and include a long tapered hub, which gives them excellent stress distribution. When it is necessary to use high pressure and temperature.
Slip-On Flanges (SORF):
These flanges have pipes that are fillet-welded internally and externally. They are simple to put into line and can be used at moderate-pressure.
Blind Flanges (BLRF):
Flanges of solid material to strive end of a pipe or a valve. Ideal in terms of maintenance, pressure testing or temporary closure.
Socket Weld Flanges (SWRF):
Purpose designed to suit piping of small diameter, high pressure. The pipe is fitted and welded in a socket, establishing joints that are leakproof.
Threaded Flanges:
Joined together with internal threads and not welded. Applied to temporary or special installations that cannot be welded.
Lap Joint Flanges:
Fit over stub ends so that they can easily fit and remove. This is good in an application where the system has to be serviced frequently.
Applications & industries use of SS 304L Flanges
The SS 304L flanges are commonly used in many industries, and a few of the common ones are given below:
- Food & Beverage: It’s used to provide hygiene and corrosion resistance in processing lines, tanks and piping systems.
- Chemical Industry: It’s also best suited for welded systems that are subjected to corrosive chemicals; inhibits intergranular corrosion.
- Water Treatment: Sturdy in pipelines and filtration systems, resistant to chlorides and other reactive elements.
- Pharmaceuticals: Ensures the integrity and dependability of piping systems in delicate procedures.
- Cryogenics: Remains hard and permeable at very low temperatures.
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Advantages of SS 304L flanges
SS 304L flanges have been popular among most piping systems due to the fact that they are both strengthened and reliable, as well as easily usable.
- Excellent Weldability: Their low carbon content prevents intergranular corrosion, hence the strength and long life of the welded joint.
- Excellent Corrosion Protection: These flanges can withstand chloride-rich and high temperatures easily and ensure the pipelines are not damaged.
- Cost-Effective Solution: They provide a more affordable replacement of 316 stainless steel that works with general industries.
- Durable & Hygienic: SS 304L Flanges have a smooth surface, which makes them clean and easy to maintain, which is why they find application in the sanitary industry in food, beverage, and pharmaceuticals.
SS DIN 1.4306 Screwed Flanges Price
The table below gives you the estimated price range of the SS DIN 1.4306 Screwed Flanges. For accurate pricing, contact us.
| Description / Flange Type | Price in India (INR) | Price in UAE (AED) |
| ASTM A182 Grade F304L Slip-On Flanges | Rs. 2,480.51 | AED 128.60 |
| ASTM A182 Gr F304L Flanges (Standard) | Rs. 850.46 | AED 44.09 |
| Stainless Steel 304L Pipe Flanges | Rs. 1,771.79 | AED 91.86 |
| 304L Stainless Steel Flanges (Mumbai Market) | Rs. 4,252.31 | AED 220.46 |
| ASME SA182 F304L Blind Flanges | Rs. 1,417.44 | AED 73.49 |
Frequently Asked Questions (FAQ)
No. They are not highly resistant to chloride corrosion; SS 316 is preferred.
The common difference between them is that 304L has lower carbon (=0.03%) to prevent intergranular corrosion in welded joints.
They can withstand up to 870 -C (1598 -F) for oxidation resistance; continuous use above 425-860 -C may risk carbide precipitation.
No, they are mostly non-magnetic in the annealed state.
To properly weld the SS 304L, use proper filler metal (e.g., 308L), avoid overheating, and minimize post-weld heat to prevent corrosion.
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