Mill TC / Test Certificate Support
Product Range
Flanges
Industrial flanges with dimensional accuracy, pressure-class compatibility and ready-to-install sealing faces.
Ready StockCustom SizesThird Party InspectionExport Packing
Category: Ferrous & Non-Ferrous Metals
Flanges Specifications
Every order is checked for grade, dimension, surface condition and packing before dispatch. Supply can be arranged in standard lengths, cut lengths or fabrication-ready bundles.
| Forms | Weld neck, slip on, socket weld, blind, lap joint, threaded, spectacle blind, orifice |
|---|---|
| Standards | ASME B16.5, B16.47, B16.36, ANSI, DIN, EN, BS, JIS |
| Size Range | 1/2 NB to 48 NB, Class 150 to 2500 |
| Materials | Stainless steel, carbon steel, alloy steel, duplex, super duplex, nickel alloys, copper nickel |
| Applications | Piping joints, valves, pumps, pressure vessels, offshore and plant maintenance |
Value Added Services
- Cutting, beveling, threading or machining as applicable
- PMI, hardness, hydro, ultrasonic and dimensional inspection
- Material test certificates and third-party inspection coordination
- Domestic and export-safe packing with clear product marking
Available Materials
- SS F304 / F304L / F316 / F316L / F321 / F347
- CS ASTM A105 / A350 LF2
- AS ASTM A182 F5 / F9 / F11 / F22 / F91
- Duplex F51 / F60, Super Duplex F53 / F55
- Inconel, Monel, Hastelloy, Titanium and Cu-Ni
Selection Notes
Use stainless steel for corrosion resistance, carbon steel for general process piping, alloy steel for elevated temperature service, duplex grades for chloride environments and nickel alloys for severe chemical duties.
Ask For Grade Guidance| Stainless Steel | ASTM A182 - 304, 304H, 304L, 316, 316H, 316L, 316Ti, 309, 310, 317L, 321, 347, 904L |
|---|---|
| Duplex & Super Duplex | ASTM A182 - F51, F53, F55 |
| Alloy Steel | ASTM A234 WPB WP5, WP9, WP11, WP12, WP91 |
|---|---|
| Carbon Steel | ASTM A234 WPB, IS 1239 PART II |
| Low Temp. CS | ASTM A420 WPL6 |
| Other Service | Hot Dip Galvanizing, Sand Blasting |
| Nickel | ASTM B564 N02200, N02201 |
|---|---|
| Inconel | ASTM B564 N06600, N06601, N06617, N07718, N06625 |
| Incoloy | ASTM B564 N08800, N08810, N08825, N08020 |
| Hastelloy | ASTM B564 N10276, N06022, N10665, N06455 |
| Titanium CP | Gr.1 R56250, Gr.2 R50400, Gr.3 R50550, Gr.4 R50700, Gr.7 R52400, Gr.11 R52250 |
| Titanium Alloy | Gr.5 R56400 (6Al-4V), Gr.23 R56401 (6Al-4V-ELI), Gr.12 R53400 |
| Copper Nickel | ASTM B171 C70600 (90:10), ASTM B171 C71500 (70:30) |
|---|---|
| Monel | ASTM B127 N04400, DIN N05500 |
| Size | 1/2" NB to 48" NB, ANSI B16.5 |
| Class | 150#, 300#, 600#, 900#, 1500#, 2500# |
| Types | Weldneck, Socketweld, Slip On, Blind, Screwed / Threaded, Long Weldneck, Lapped Joint, Spectacle Blind |
Slip-On Flange Dimensions
| Nominal Size (NPS) |
Flange Dimensions (in) | Hub & Bore (in) | Drilling (in) | Weight (lbs) |
||||||
|---|---|---|---|---|---|---|---|---|---|---|
| O.D (O) | Thick (T) | R.F (R) | Len (Y) | Hub (X) | Bore (B) | Circle (C) | Holes | Dia | ||
| 1/2" | 3.50 | 0.44 | 1.38 | 0.63 | 1.19 | 0.88 | 2.38 | 4 | 0.63 | 1 |
| 3/4" | 3.88 | 0.50 | 1.69 | 0.63 | 1.50 | 1.09 | 2.75 | 4 | 0.63 | 2 |
| 1" | 4.25 | 0.56 | 2.00 | 0.69 | 1.94 | 1.36 | 3.13 | 4 | 0.63 | 2 |
| 1 1/4" | 4.63 | 0.63 | 2.50 | 0.81 | 2.31 | 1.70 | 3.50 | 4 | 0.63 | 3 |
| 1 1/2" | 5.00 | 0.69 | 2.88 | 0.88 | 2.56 | 1.95 | 3.88 | 4 | 0.63 | 3 |
| 2" | 6.00 | 0.75 | 3.63 | 1.00 | 3.06 | 2.44 | 4.75 | 4 | 0.75 | 5 |
| 2 1/2" | 7.00 | 0.88 | 4.13 | 1.13 | 3.56 | 2.94 | 5.50 | 4 | 0.75 | 7 |
| 3" | 7.50 | 0.94 | 5.00 | 1.19 | 4.25 | 3.57 | 6.00 | 4 | 0.75 | 8 |
| 3 1/2" | 8.50 | 0.94 | 5.50 | 1.25 | 4.81 | 4.07 | 7.00 | 8 | 0.75 | 11 |
| 4" | 9.00 | 0.94 | 6.19 | 1.31 | 5.31 | 4.57 | 7.50 | 8 | 0.75 | 13 |
| 5" | 10.00 | 0.94 | 7.31 | 1.44 | 6.44 | 5.66 | 8.50 | 8 | 0.88 | 15 |
| 6" | 11.00 | 1.00 | 8.50 | 1.56 | 7.56 | 6.72 | 9.50 | 8 | 0.88 | 19 |
| 8" | 13.50 | 1.13 | 10.63 | 1.75 | 9.69 | 8.72 | 11.75 | 8 | 0.88 | 30 |
| 10" | 16.00 | 1.19 | 12.75 | 1.94 | 12.00 | 10.88 | 14.25 | 12 | 1.00 | 43 |
| 12" | 19.00 | 1.25 | 15.00 | 2.19 | 14.38 | 12.088 | 17.00 | 12 | 1.00 | 64 |
| 14" | 21.00 | 1.38 | 16.25 | 2.25 | 15.75 | 14.14 | 18.75 | 12 | 1.13 | 90 |
| 16" | 23.50 | 1.44 | 18.50 | 2.50 | 18.00 | 16.16 | 21.25 | 16 | 1.13 | 98 |
| 18" | 25.00 | 1.56 | 21.00 | 2.69 | 19.88 | 18.18 | 22.75 | 16 | 1.25 | 130 |
| 20" | 27.50 | 1.69 | 23.00 | 2.88 | 22.00 | 20.20 | 25.00 | 20 | 1.25 | 165 |
| 22" | 29.50 | 1.81 | 25.25 | 3.13 | 24.25 | 22.22 | 27.25 | 20 | 1.38 | 185 |
| 24" | 32.00 | 1.88 | 27.25 | 3.25 | 26.13 | 24.25 | 29.50 | 20 | 1.38 | 220 |
Blind Flange Dimensions (Class 150 - 2500)
| Dimension (NPS 1/2) |
Pressure Class | ||||||
|---|---|---|---|---|---|---|---|
| 150 | 300 | 400 | 600 | 900 | 1500 | 2500 | |
| Diameter (D) | 90 | 95 | 95 | 95 | 120 | 120 | 135 |
| Height (B) | 9.6 | 12.7 | 14.3 | 14.3 | 22.3 | 22.3 | 30.2 |
| Diameter (G) | 35.1 | 35.1 | 35.1 | 35.1 | 35.1 | 35.1 | 35.1 |
| Diameter (K) | 60.3 | 66.7 | 66.7 | 66.7 | 82.6 | 82.6 | 88.9 |
| Bolt Holes | 4 | 4 | 4 | 4 | 4 | 4 | 4 |
| Stud Length | 55 | 65 | 75 | 75 | 110 | 110 | 120 |
Lap Joint Flange Dimensions
| Nominal Size (NPS) |
Flange Dimensions (in) | Hub & Bore (in) | Drilling (in) | Weight (lbs) |
||||||
|---|---|---|---|---|---|---|---|---|---|---|
| O.D (O) | Thick (T) | Len (Y) | Hub (X) | Radius (B) | Bore (B) | Circle (C) | Holes | Dia | ||
| 1/2" | 3.50 | 0.44 | 0.63 | 1.19 | 0.13 | 0.90 | 2.38 | 4 | 0.63 | 1 |
| 3/4" | 3.88 | 0.50 | 0.63 | 1.50 | 0.13 | 1.11 | 2.75 | 4 | 0.63 | 2 |
| 1" | 4.25 | 0.56 | 0.69 | 1.94 | 0.13 | 1.38 | 3.13 | 4 | 0.63 | 2 |
| 1 1/4" | 4.63 | 0.63 | 0.81 | 2.31 | 0.19 | 1.72 | 3.50 | 4 | 0.63 | 3 |
| 1 1/2" | 5.00 | 0.69 | 0.88 | 2.56 | 0.25 | 1.97 | 3.88 | 4 | 0.63 | 3 |
| 2" | 6.00 | 0.75 | 1.00 | 3.06 | 0.31 | 2.46 | 4.75 | 4 | 0.75 | 5 |
| 2 1/2" | 7.00 | 0.88 | 1.13 | 3.56 | 0.31 | 2.97 | 5.50 | 4 | 0.75 | 7 |
| 3" | 7.50 | 0.94 | 1.19 | 4.25 | 0.38 | 3.60 | 6.00 | 4 | 0.75 | 8 |
| 3 1/2" | 8.50 | 0.94 | 1.25 | 4.81 | 0.38 | 4.10 | 7.00 | 8 | 0.75 | 11 |
| 4" | 9.00 | 0.94 | 1.31 | 5.31 | 0.44 | 4.60 | 7.50 | 8 | 0.75 | 13 |
| 5" | 10.00 | 0.94 | 1.44 | 6.44 | 0.44 | 5.69 | 8.50 | 8 | 0.88 | 15 |
| 6" | 11.00 | 1.00 | 1.56 | 7.56 | 0.50 | 6.75 | 9.50 | 8 | 0.88 | 19 |
| 8" | 13.50 | 1.13 | 1.75 | 9.69 | 0.50 | 8.75 | 11.75 | 8 | 0.88 | 30 |
| 10" | 16.00 | 1.19 | 1.94 | 12.00 | 0.50 | 10.92 | 14.25 | 12 | 1.00 | 43 |
| 12" | 19.00 | 1.25 | 2.19 | 14.38 | 0.50 | 12.92 | 17.00 | 12 | 1.00 | 64 |
| 14" | 21.00 | 1.38 | 3.13 | 15.75 | 0.50 | 14.18 | 18.75 | 12 | 1.13 | 105 |
| 16" | 23.50 | 1.44 | 3.44 | 18.00 | 0.50 | 16.19 | 21.25 | 16 | 1.13 | 140 |
| 18" | 25.00 | 1.56 | 2.88 | 19.88 | 0.50 | 18.20 | 22.75 | 16 | 1.25 | 160 |
| 20" | 27.50 | 1.69 | 4.06 | 22.00 | 0.50 | 20.25 | 25.00 | 20 | 1.25 | 195 |
| 22" | 29.50 | 1.81 | 4.25 | 24.25 | 0.50 | 22.25 | 27.25 | 20 | 1.38 | 245 |
| 24" | 32.00 | 1.88 | 4.38 | 26.13 | 0.50 | 24.25 | 29.50 | 20 | 1.38 | 275 |
Socket Weld Flange Dimensions
| Nominal Size (NPS) |
Flange Dimensions (in) | Hub & Bore (in) | Drilling (in) | Weight (lbs) |
||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| O.D (O) | Thick (T) | R.F (R) | Len (Y) | Hub (X) | Bore (B1) | Bore (B2) | Depth (D) | Circle (C) | Holes | Dia | ||
| 1/2" | 3.50 | 0.44 | 1.38 | 0.63 | 1.19 | 0.62 | 0.88 | 0.38 | 2.38 | 4 | 0.63 | 1 |
| 3/4" | 3.88 | 0.50 | 1.69 | 0.63 | 1.50 | 0.82 | 1.09 | 0.44 | 2.75 | 4 | 0.63 | 2 |
| 1" | 4.25 | 0.56 | 2.00 | 0.69 | 1.94 | 1.05 | 1.36 | 0.50 | 3.13 | 4 | 0.63 | 2 |
| 1 1/4" | 4.63 | 0.63 | 2.50 | 0.81 | 2.31 | 1.38 | 1.70 | 0.56 | 3.50 | 4 | 0.63 | 3 |
| 1 1/2" | 5.00 | 0.69 | 2.88 | 0.88 | 2.56 | 1.61 | 1.95 | 0.63 | 3.88 | 4 | 0.63 | 3 |
| 2" | 6.00 | 0.75 | 3.63 | 1.00 | 3.06 | 2.07 | 2.44 | 0.69 | 4.75 | 4 | 0.75 | 5 |
| 2 1/2" | 7.00 | 0.88 | 4.13 | 1.13 | 3.56 | 2.47 | 2.94 | 0.75 | 5.50 | 4 | 0.75 | 7 |
| 3" | 7.50 | 0.94 | 5.00 | 1.19 | 4.25 | 3.07 | 3.57 | 0.81 | 6.00 | 4 | 0.75 | 8 |
| 3 1/2" | 8.50 | 0.94 | 5.50 | 1.25 | 4.81 | 3.55 | 4.07 | 0.88 | 7.00 | 8 | 0.75 | 11 |
| 4" | 9.00 | 0.94 | 6.19 | 1.31 | 5.31 | 4.03 | 4.57 | 0.94 | 7.50 | 8 | 0.75 | 13 |
| 5" | 10.00 | 0.94 | 7.31 | 1.44 | 6.44 | 5.05 | 5.66 | 0.94 | 8.50 | 8 | 0.88 | 15 |
| 6" | 11.00 | 1.00 | 8.50 | 1.56 | 7.56 | 6.07 | 6.72 | 1.06 | 9.50 | 8 | 0.88 | 19 |
| 8" | 13.50 | 1.13 | 10.63 | 1.75 | 9.69 | 7.98 | 8.72 | 1.25 | 11.75 | 8 | 0.88 | 30 |
| 10" | 16.00 | 1.19 | 12.75 | 1.94 | 12.00 | 10.02 | 10.88 | 1.31 | 14.25 | 12 | 1.00 | 43 |
| 12" | 19.00 | 1.25 | 15.00 | 2.19 | 14.38 | 12.00 | 12.88 | 1.56 | 17.00 | 12 | 1.00 | 64 |
| 14" | 21.00 | 1.38 | 16.25 | 2.25 | 15.75 | 13.25 | 14.14 | 1.63 | 18.75 | 12 | 1.13 | 90 |
| 16" | 23.50 | 1.44 | 18.50 | 2.50 | 18.00 | 15.25 | 16.16 | 1.75 | 21.25 | 16 | 1.13 | 98 |
| 18" | 25.00 | 1.56 | 21.00 | 2.69 | 19.88 | 17.25 | 18.18 | 1.94 | 22.75 | 16 | 1.25 | 130 |
| 20" | 27.50 | 1.69 | 23.00 | 2.88 | 22.00 | 19.25 | 20.20 | 2.13 | 25.00 | 20 | 1.25 | 165 |
| 22" | 29.50 | 1.81 | 25.25 | 3.13 | 24.25 | 21.25 | 22.22 | 2.38 | 27.25 | 20 | 1.38 | 185 |
| 24" | 32.00 | 1.88 | 27.25 | 3.25 | 26.13 | 23.25 | 24.25 | 2.50 | 29.50 | 20 | 1.38 | 220 |
Weld Neck Flange Dimensions
| Nominal Size (NPS) |
Flange Data (in) | Hub Dimensions (in) | Drilling (in) | ||||||
|---|---|---|---|---|---|---|---|---|---|
| O.D (O) | Thick (C) | R.F (R) | Len (Y) | Base (X) | Neck (A) | Circle | Holes | Dia | |
| 1/2" | 3.50 | 0.44 | 1.38 | 1.88 | 1.19 | 0.84 | 2.38 | 4 | 0.62 |
| 3/4" | 3.88 | 0.50 | 1.69 | 2.06 | 1.50 | 1.05 | 2.75 | 4 | 0.62 |
| 1" | 4.25 | 0.56 | 2.00 | 2.19 | 1.94 | 1.32 | 3.12 | 4 | 0.62 |
| 1 1/4" | 4.62 | 0.62 | 2.50 | 2.25 | 2.31 | 1.66 | 3.50 | 4 | 0.62 |
| 1 1/2" | 5.00 | 0.69 | 2.88 | 2.44 | 2.56 | 1.90 | 3.88 | 4 | 0.62 |
| 2" | 6.00 | 0.75 | 3.62 | 2.50 | 3.06 | 2.38 | 4.75 | 4 | 0.75 |
| 3" | 7.50 | 0.94 | 5.00 | 2.75 | 4.25 | 3.50 | 6.00 | 4 | 0.75 |
| 4" | 9.00 | 0.94 | 6.19 | 3.00 | 5.31 | 4.50 | 7.50 | 8 | 0.75 |
| 6" | 11.00 | 1.00 | 8.50 | 3.50 | 7.56 | 6.62 | 9.50 | 8 | 0.88 |
Threaded Flange Dimensions (Class 150)
| Nominal Size (NPS) |
Flange Dimensions (in) | Drilling (in) | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| OD | T | T1 | T2 | H | ID | R | RF | BC | Holes | Dia (B) | |
| 1/2" | 3.50 | 0.62 | 0.44 | 0.62 | 1.19 | 0.84 | 1.38 | 0.06 | 2.38 | 4 | 0.62 |
| 3/4" | 3.88 | 0.62 | 0.50 | 0.62 | 1.50 | 1.05 | 1.69 | 0.06 | 2.75 | 4 | 0.62 |
| 1" | 4.25 | 0.69 | 0.56 | 0.69 | 1.94 | 1.32 | 2.00 | 0.06 | 3.12 | 4 | 0.62 |
| 1 1/4" | 4.62 | 0.81 | 0.62 | 0.81 | 2.31 | 1.66 | 2.50 | 0.06 | 3.50 | 4 | 0.62 |
| 1 1/2" | 5.00 | 0.88 | 0.69 | 0.88 | 2.56 | 1.90 | 2.88 | 0.06 | 3.88 | 4 | 0.62 |
| 2" | 6.00 | 1.00 | 0.75 | 1.00 | 3.06 | 2.38 | 3.62 | 0.06 | 4.75 | 4 | 0.75 |
| 2 1/2" | 7.00 | 1.12 | 0.88 | 1.12 | 3.56 | 2.88 | 4.12 | 0.06 | 5.50 | 4 | 0.75 |
| 3" | 7.50 | 1.19 | 0.94 | 1.19 | 4.25 | 3.50 | 5.00 | 0.06 | 6.00 | 4 | 0.75 |
| 4" | 9.00 | 1.31 | 0.94 | 1.31 | 5.31 | 4.50 | 6.19 | 0.06 | 7.50 | 8 | 0.75 |