Veer Flanges, a leading manufacturer and supplier in Kolkata, India, provides high-quality Mild Steel Flanges with strength, durability, and affordability. Specifically designed for piping applications in general purpose, these flanges are produced to national and international standards and guarantee consistent performance under moderate temperature and pressure conditions. Veer Flanges is a company that consistently delivers good quality mild steel flange solutions in accurate dimensions, protection against corrosion, and on-time dispatch. Their products serve different industries such as construction, plumbing, water treatment, and mechanical systems in India and international markets.
Mild Steel Flanges are generally constructed from low-carbon steel, which typically contains up to 0.25% carbon and small quantities of manganese, silicon, and trace amounts of other elements. They possess good weldability, ductility, and tensile strength (typically between 330–420 MPa). While not naturally corrosion-resistant, mild steel flanges are typically coated or galvanized to resist rust. Their ease of construction and low cost make them preferred for non-corrosive applications and general engineering purposes.
| Specifications | MS |
|---|---|
| Size Ranges | From 1/2 inch (i.e. 15 NB) upto 48 inch (i.e. 1200NB) |
| JIS Standards | 5 K, 10K, 16K, 20 K, 30K, 40K, 63 K |
| Flange Face Type | FF, RF, LMF, SMF, RTJ, LJF. |
| Pressure Classes | Cl 150, Class 300, Cl. 400, 600, Class 900, Cl 1500 and 2500 |
| Standards | ASME | BS | DIN | ANSI | GOST | EN Flange |
| UNI/ DIN / EN Standard | 6Bar, 10 Bar, 16Bar, 25 Bar, 40Bar |
| Composition | Content |
|---|---|
| Sulfur, S | ≤ 0.050 % |
| Iron, Fe | 98.81 – 99.26 % (as remainder) |
| Carbon, C | 0.14 – 0.20 % |
| Manganese, Mn | 0.60 – 0.90 % |
| Phosphorous, P | ≤ 0.040 % |
| Mechanical Properties | Metric | Imperial |
|---|---|---|
| Hardness, Knoop (Converted from Brinell hardness) | 145 | 145 |
| Hardness, Brinell | 126 | 126 |
| Tensile Strength, Yield | 370 MPa | 53700 psi |
| Elongation at Break (In 50 mm) | 15.0 % | 15.0 % |
| Poissons Ratio | 0.290 | 0.290 |
| Reduction of Area | 40.0 % | 40.0 % |
| Machinability (Based on AISI 1212 steel. as 100% machinability) | 70 % | 70 % |
| Modulus of Elasticity | 205 GPa | 29700 ksi |
| Bulk Modulus | 140 GPa | 20300 ksi |
| Shear Modulus | 80.0 GPa | 11600 ksi |
| Hardness, Vickers (Converted from Brinell hardness) | 131 | 131 |
| Hardness, Rockwell B (Converted from Brinell hardness) | 71 | 71 |
| Tensile Strength, Ultimate | 440 MPa | 63800 psi |
| Size inches | Size (millimeter) | Flange Thk. | O.D. | RF Height | RF Diam. | PCD | Bolt Size UNC | No. of Bolts | Machine Bolt Length | Hole Size | RF Stud Length | ISO Stud Size | Wt in kilogram |
| B | A | D | C | E | |||||||||
| 1/2 | 15 | 9.6 | 90 | 2 | 34.9 | 60.3 | 1/2 | 4 | 50 | 5/8 | 55 | M14 | 0.9 |
| 3/4 | 20 | 11.2 | 100 | 2 | 42.9 | 69.9 | 1/2 | 4 | 50 | 5/8 | 65 | M14 | 0.9 |
| 1 | 25 | 12.7 | 110 | 2 | 50.8 | 79.4 | 1/2 | 4 | 55 | 5/8 | 65 | M14 | 0.9 |
| 1 1/4 | 32 | 14.3 | 115 | 2 | 63.5 | 88.9 | 1/2 | 4 | 55 | 5/8 | 70 | M14 | 1.4 |
| 1 1/2 | 40 | 15.9 | 125 | 2 | 73 | 98.4 | 1/2 | 4 | 65 | 5/8 | 70 | M14 | 1.8 |
| 2 | 50 | 17.5 | 150 | 2 | 92.1 | 120.7 | 5/8 | 4 | 70 | 3/4 | 85 | M16 | 2.3 |
| 2 1/2 | 65 | 20.7 | 180 | 2 | 104.8 | 139.7 | 5/8 | 4 | 75 | 3/4 | 90 | M16 | 3.2 |
| 3 | 80 | 22.3 | 190 | 2 | 127 | 152.4 | 5/8 | 4 | 75 | 3/4 | 90 | M16 | 4.1 |
| 3 1/2 | 90 | 22.3 | 215 | 2 | 139.7 | 177.8 | 5/8 | 8 | 75 | 3/4 | 90 | M16 | 5.9 |
| 4 | 100 | 22.3 | 230 | 2 | 157.2 | 190.5 | 5/8 | 8 | 75 | 3/4 | 90 | M16 | 7.7 |
| 5 | 125 | 22.3 | 255 | 2 | 185.7 | 215.9 | 3/4 | 8 | 85 | 7/8 | 95 | M20 | 9.1 |
| 6 | 150 | 23.9 | 280 | 2 | 215.9 | 241.3 | 3/4 | 8 | 85 | 7/8 | 100 | M20 | 11.8 |
| 8 | 200 | 27 | 345 | 2 | 269.9 | 298.5 | 3/4 | 8 | 90 | 7/8 | 110 | M20 | 20.5 |
| 10 | 250 | 28.6 | 405 | 2 | 323.8 | 362 | 7/8 | 12 | 100 | 1 | 115 | M24 | 32 |
| 12 | 300 | 30.2 | 485 | 2 | 381 | 431.8 | 7/8 | 12 | 100 | 1 | 120 | M24 | 50 |
| 14 | 350 | 33.4 | 535 | 2 | 412.8 | 476.3 | 1 | 12 | 115 | 1 1/8 | 135 | M27 | 64 |
| 16 | 400 | 35 | 595 | 2 | 469.9 | 539.8 | 1 | 16 | 115 | 1 1/8 | 135 | M27 | 82 |
| 18 | 450 | 38.1 | 635 | 2 | 533.4 | 577.9 | 1 1/8 | 16 | 125 | 1 1/4 | 145 | M30 | 100 |
| 20 | 500 | 41.3 | 700 | 2 | 584.2 | 635 | 1 1/8 | 20 | 140 | 1 1/4 | 160 | M30 | 130 |
| 24 | 600 | 46.1 | 815 | 2 | 692.2 | 749.3 | 1 1/4 | 20 | 150 | 1 3/8 | 170 | M33 | 196 |
Veer Flanges, a leading supplier in Kolkata, India, offers an extensive selection of Mild Steel Flanges, including weld neck flanges, slip-on flanges, blind flanges, threaded flanges, and lap joint flanges. Designed for diverse industrial applications, our high-quality inventory and commitment to exceptional service make us a trusted choice for flange products in the region.
| NPS | O.D. of Flange | Flanges Thickness | Diameter of RF | Diameter of Hub at Base | Lengtd Tdru Hub | Bore or Diameter | Dia. of Hub at Bevel | Radius of Fillet | Deptd of Socket | |||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Welding (WN) Neck | Slip-On (SORF) Threaded (NPT) Socket (SWRF) | Lap Joint (Loose) | Slip-on (SORF) Socket (SWRF) | Lap Joint (Loose) | ||||||||
| O | Q | R | X | Y | Y | Y | W | B | H | r | Z | |
| 1/2 | 3-1/2 | 7/16 | 1-3/8 | 1-3/16 | 1-7/8 | 5/8 | 5/8 | .88 | .90 | .84 | 1/8 | 3/8 |
| 3/4 | 3-7/8 | 1/2 | 1-11/16 | 1-1/2 | 2-1/16 | 5/8 | 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 | 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 | 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 | 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 | 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 | 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 | 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 | 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 | 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 | 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 | 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 | 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 | 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 | 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 | 3-1/8 | 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 | 3-7/16 | 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 | 3-13/16 | 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 | 4-1/16 | 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 | 4-3/8 | 24.25 | 24.25 | 24.00 | 1/2 | 2-1/2 |
| Nominal Pipe Sizes (NPS) | Slip On (SORF) | Threaded (NPT) | Socket Weld (SWRF) | Lap Joint (Loose) | Blind (BLRF) | Weld Neck (WRNR) |
|---|---|---|---|---|---|---|
| ½ | 1 | 1 | 2 | 1 | 2 | 2 |
| ¾ | 2 | 2 | 2 | 2 | 2 | 2 |
| 1 | 2 | 2 | 2 | 2 | 2 | 3 |
| 1¼ | 3 | 3 | 3 | 3 | 3 | 3 |
| 1½ | 3 | 3 | 3 | 3 | 4 | 4 |
| 2 | 5 | 5 | 5 | 5 | 5 | 6 |
| 2½ | 8 | 8 | 8 | 8 | 7 | 10 |
| 3 | 9 | 9 | 9 | 9 | 9 | 11.5 |
| 3½ | 11 | 12 | 11 | 11 | 13 | 12 |
| 4 | 13 | 13 | 13 | 13 | 17 | 16.5 |
| 5 | 15 | 15 | 15 | 15 | 20 | 21 |
| 6 | 19 | 19 | 19 | 19 | 27 | 26 |
| 8 | 30 | 30 | 30 | 30 | 47 | 42 |
| 10 | 43 | 43 | 43 | 43 | 70 | 54 |
| 12 | 64 | 64 | 64 | 64 | 123 | 88 |
| 14 | 90 | 90 | 90 | 105 | 140 | 114 |
| 16 | 106 | 98 | 98 | 140 | 180 | 140 |
| 18 | 130 | 130 | 130 | 160 | 220 | 165 |
| 20 | 165 | 165 | 165 | 195 | 285 | 197 |
| 22 | 185 | 185 | 185 | 245 | 355 | 225 |
| 24 | 220 | 220 | 220 | 275 | 430 | 268 |
Yes, we offer custom sizes for Mild Steel Flanges to meet specific project needs. Our team at Veer Flanges is committed to providing tailored solutions for all your requirements. For more details, contact us at sales@veerflanges.co.in.
We are renowned for delivering products with precise, accurate dimensions. Each product undergoes thorough testing, both destructive and non-destructive, to ensure quality before being shipped to our customers.
Mild Steel Flanges find broad application across water supply, fire-fighting systems, HVAC, plumbing, structural support, and fabrication works. They find perfect application in piping, pump, and valve connections in systems where the working conditions are not excessively corrosive or severe. They are employed in water pipes, compressed air pipes, building infrastructure, and low-pressure steam systems. Because of their strength and weldability, mild steel flanges are often selected for structural and mechanical uses which necessitate cost-effective and flexible solutions to connecting pipes.
Mild Steel Flanges are widely used across various industries due to their versatility and strength. They serve as critical components in piping systems, enabling the connection, sealing, and regulation of fluid flow in oil and gas, water treatment, and chemical processing industries. In construction, they are used in structural frameworks and heavy machinery for their excellent load-bearing capacity. Mild Steel Flanges are also employed in HVAC systems, automotive components, and power generation equipment. Their affordability, weldability, and durability make them ideal for applications requiring strong and reliable joints, ensuring efficient operation in both high-pressure and low-pressure environments.
Our team is ready to assist you. Contact us for any queries or personalized solutions.
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