
Honesty Steel & Alloys Ltd. is a manufacturer, exporter and supplier of Stainless Steel 304/304L Flanges. We offer multiple flange types, sizes, pressure classes, facing configurations and supply forms for standard and customized requirements.
SS 304/304L Blind Flanges are solid flanges without a central bore. They are used to close the end of piping systems, pressure vessels, valves or nozzles. Blind flanges can also provide access to sections of a piping system for inspection and maintenance. SS 304/304L Slip-On Flanges are installed by sliding the flange over the outside diameter of the pipe and then welding it into position. They are commonly selected for general-purpose piping applications because of their relatively simple installation.
SS 304/304L Weld Neck Flanges have a long tapered hub that provides a gradual transition between the flange and pipe. They are commonly used in high-pressure, high-temperature and critical piping systems where strong welded connections are required. The tapered hub helps distribute stress between the pipe and flange. They are commonly selected for critical piping systems, pressure applications and process industries.
SS UNS S30400 Socket Weld Flanges feature an internal socket into which the pipe is inserted before welding. They are commonly used with smaller-diameter piping systems where compact and reliable connections are required. SS 304/304L Spectacle Blind Flanges combine an open ring and solid blind section into a single component. They allow piping systems to be positively isolated by rotating the assembly. SS 304/304L Lap Joint Flanges are used with stub ends and allow the flange to rotate around the pipe. This can simplify bolt-hole alignment and installation, particularly where frequent dismantling is required.
Stainless Steel 304/304L Long Weld Neck Flanges have an extended neck and are used in applications requiring additional reinforcement or an extended transition between the pipe and flange. Stainless Steel 304/304L Threaded Flanges offer a mechanically threaded connection without requiring welding. They can be used in applications where welding facilities are unavailable or where heat input needs to be avoided. Proper thread compatibility and pressure-temperature suitability should be confirmed before installation.
| Specification | Details |
|---|---|
| Product | Stainless Steel 304/304L Flanges |
| Material Type | Austenitic Stainless Steel |
| Standards | ASME, ASTM, ANSI, DIN, EN, BS, JIS |
| Common ASTM Specification | ASTM A182 |
| Common ASME Specification | ASME SA182 |
| Pressure Classes | 150, 300, 600, 900, 1500, 2500 |
| Nominal Size | 1/2" (15 NB) to 48" (1200NB) |
| Facing | Flate Face (FF), Raised Face (RF), Ring Type Joint (RTJ) |
| Manufacturing | Forged / Machined |
| Connection Types | Blind, Slip-On, Weld Neck, Socket Weld, Threaded, Lap Joint, etc. |
| Flanges Types | Blind Flanges (BLRF), Weld neck Flanges (WNRF), Drawing Flanges, Screwed (Threaded) Flanges, Long weld neck Flanges (LWNRF), Socket-weld Flanges (SWRF), Orifice Flanges, Reducing Flanges, Forged Flanges, Slip-on Flanges (SORF), Large Diameter Flanges, Spacer & Blind Flanges, Industrial Flanges, Spectacle Blind Flanges, Flat Face Flanges, Raised Face (RF) Flanges, Ring Type Joint Flanges (RTJ), Plate Flanges, Custom Flanges, Lap Joint Flanges (SOLJ), etc. |
| Surface | Machined / Polished as required |
| Testing | As per applicable specification |
| Marking | As per customer/specification requirements |
| STANDARD | UNS | WNR. | AFNOR | EN | JIS | BS | GOST |
|---|---|---|---|---|---|---|---|
| SS 304 | S30400 | 1.4301 | Z7CN18‐09 | X5CrNi18-10 | SUS 304 | 304S31 | 08Х18Н10 |
| SS 304L | S30403 | 1.4306/1.4307 | Z3CN18‐10 | X2CrNi18-9 / X2CrNi19-11 | SUS 304L | 304S11 | 03Х18Н11 |
| Grade | C | Mn | Si | P | S | Cr | Mo | Ni | N |
|---|---|---|---|---|---|---|---|---|---|
| SS 304 | 0.08 max | 2 max | 0.75 max | 0.045 max | 0.030 max | 18 – 20 | – | 8 – 11 | – |
| SS 304L | 0.035 max | 2.0 max | 1.0 max | 0.045 max | 0.03 max | 18 – 20 | – | 8 – 13 | – |
| Grade | Density | Melting Point | Tensilee Strength | Yield Strength (0.2%Offset) | Elongation |
|---|---|---|---|---|---|
| SS 304/304L | 8.0 g/cm3 | 1400 °C (2550 °F) | Psi – 75000, MPa – 515 | Psi – 30000, MPa – 205 | 40 % |
Stainless Steel 304/304L Slip On Flanges
Stainless Steel 304/304L Socket Weld Flanges
Stainless Steel 304/304L Blind Flanges
Stainless Steel 304/304L Weld Neck Flanges
Stainless Steel 304/304L Threaded / Screwed Flanges
Stainless Steel 304/304L Lap Joint Flanges
Stainless Steel 304/304L Long Weld Neck Flanges
Stainless Steel 304/304L Spectacle Blind Flanges
Stainless Steel 304/304L Plate Flanges
Stainless Steel 304/304L Ring Type Joint Flanges
Stainless Steel 304/304L Tongue & Groove Flanges
Stainless Steel 304/304L Reducing Flanges
Stainless Steel 304/304L Nippo Flanges
Stainless Steel 304/304L Orifice Flanges
Stainless Steel 304/304L Square Flanges
Stainless Steel 304/304L Spades Ring Spacers Flanges
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| American Steel Flanges Standard | |
| Standard Code | Standard Name |
| ANSI ASME SA-182 | Forged Flanges |
| ANSI ASME B16.5 | Slip on flange, Welding neck flange, Blind flange, Threaded flange, Lap joint flange, RTJ flange |
| ASME – B 16.47 | Welding neck flange, Blind flange |
| ASME – B 16.36 | Welding neck flange Slip on flange |
| German Steel Flanges Standard | |
| DIN 2527 | Steel Blind Flanges, BLRF |
| DIN 2573 / 2576 | Flat Flange for Welding (Slip On) |
| DIN 2673 | Loose Flanges and Rings for Welding (Slip On Flanges and Plain Collars) |
| DIN 2641 / 2642 | Lapped / Loose (Lap Joint) Flanges Plain Collars |
| DIN 28115 | Long Neck Welding Flanges |
| DIN PN10, PN16 | SS 304 PN10 Flanges, 304 SS DIN PN 10 Flanges, 304 SS PN16 Flange |
| DIN PN20, PN25 | SS 304 PN20 Flanges, 304 SS DIN PN 25 Flanges |
| DIN PN40, PN50 | SS 304 PN40 Flanges, 304 SS DIN PN 50 Flanges |
| Japanese Steel Flanges Standard | |
| JIS B2220 | Slipon plate flange (SOP), Slipon Hub (SOH), Socket Welding flange (SW), Welding neck flange (WN), Lapjoint (LJ), Threaded flange (TR)/ Itegral flange (IT) Blank flange (BL) |
| JIS B2291 | Slipon plate flange (SOP), Slipon Hub (SOH), Socket Welding flange (SW), Welding neck flange (WN), Lapjoint (LJ), Threaded flange (TR)/ Itegral flange (IT) Blank flange (BL) |
| JIS 5K, 10K | SS 304 5K SORF Flanges, 304 SS 10K SOFF Flanges |
| JIS 16K, 20K | SS 304 16K Blind Flanges, 304 SS 20K BLRF Flanges |
| JIS 30K, 40K | SS 304 30K Slip on Flanges, 304 SS 40K Blind Flanges |
| Italian Flanges Standard | |
| UNI FLANGES | Plan flanges (2276, 2277, 2278, 6083, 6084) Welding neck (2280, 2281, 2282, 2283, 2284, 2285, 2286) Lapped flanges (6088, 6089, 6090, 2999, 2300) Blind flanges (6091, 6092, 6093, 6094, 6095, 6096, 6097) threaded flanges (2253, 2254) |
| British Standard Pipe Flanges Standard | |
| BS 10 Table D | SS 304 BS 10 Table D Flanges, 304 Table D Pipe Flange |
| BS 10 Table E | SS 304 BS 10 Table E Flanges, 304 Table E Pipe Flange |
| BS 10 Table F | SS 304 BS 10 Table E Flanges, 304 Stainless Steel Table E Flanges |
| BS 10 Table H | SS 304 BS 10 Table E Flanges, Stainless Steel 304 Table E Pipe Flanges |
| Pipe Normal Diam. | O.D. Flange | Thk. of Flange Min | Diam. of Hub | Diameter of Raised Face | Length Hub. Y | Thread Length | Diam.of Bolt Circle | Diam. of Bolt Holes | Number of Bolts | Diam. of Bolts (inch) | KG | LB | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| inch | dn | O | C | X | G | Y | T | BC | BH | BN | BD | ||
| 1/2″ | 15 | 89.00 | 11.20 | 30.20 | 35.10 | 15.70 | 15.70 | 60.50 | 15.80 | 4 | 1/2″ | 0.4 | 0.9 |
| 3/4″ | 20 | 98.50 | 12.70 | 38.10 | 42.90 | 15.70 | 15.70 | 69.90 | 15.80 | 4 | 1/2″ | 0.7 | 1.5 |
| 1″ | 25 | 108.00 | 14.20 | 49.30 | 50.80 | 17.50 | 17.50 | 79.30 | 15.80 | 4 | 1/2″ | 0.8 | 1.8 |
| 1-1/4″ | 32 | 117.50 | 15.70 | 58.70 | 63.50 | 20.60 | 20.60 | 88.90 | 15.80 | 4 | 1/2″ | 1.2 | 2.6 |
| 1-1/2″ | 40 | 127.00 | 17.50 | 65.00 | 73.20 | 22.40 | 22.40 | 98.60 | 15.80 | 4 | 1/2″ | 1.5 | 3.3 |
| 2″ | 50 | 152.50 | 19.10 | 77.70 | 91.90 | 25.40 | 25.40 | 120.70 | 19.10 | 4 | 5/8″ | 2.3 | 5.1 |
| 2-1/2″ | 65 | 178.00 | 22.40 | 90.40 | 104.60 | 28.40 | 28.40 | 139.70 | 19.10 | 4 | 5/8″ | 3.7 | 8.1 |
| 3″ | 80 | 190.50 | 23.90 | 108.00 | 127.00 | 30.20 | 30.20 | 152.40 | 19.10 | 4 | 5/8″ | 4.1 | 9 |
| 3-1/2″ | 90 | 216.00 | 23.90 | 122.20 | 139.70 | 31.80 | 31.80 | 177.80 | 19.10 | 8 | 5/8″ | 5.1 | 11.2 |
| 4″ | 100 | 228.50 | 23.90 | 134.90 | 157.20 | 33.30 | 33.30 | 190.50 | 19.10 | 8 | 5/8″ | 5.9 | 13 |
| 5″ | 125 | 254.00 | 23.90 | 163.60 | 185.70 | 36.60 | 36.60 | 215.90 | 22.40 | 8 | 3/4″ | 7 | 15.4 |
| 6″ | 150 | 279.50 | 25.40 | 192.00 | 215.90 | 39.60 | 39.60 | 241.30 | 22.40 | 8 | 3/4″ | 8.4 | 18.5 |
| 8″ | 200 | 343.00 | 28.40 | 246.10 | 269.70 | 44.50 | 44.50 | 298.50 | 22.40 | 8 | 3/4″ | 13 | 28.6 |
| 10″ | 250 | 406.50 | 30.20 | 304.80 | 323.90 | 49.30 | 49.30 | 362.00 | 25.40 | 12 | 7/8″ | 18 | 39.5 |
| 12″ | 300 | 482.50 | 31.80 | 365.30 | 381.00 | 55.60 | 55.60 | 431.80 | 25.40 | 12 | 7/8″ | 29 | 64 |
| 14″ | 350 | 533.50 | 35.10 | 400.10 | 412.80 | 57.20 | 57.20 | 476.30 | 28.50 | 12 | 1″ | 39 | 86 |
| 16″ | 400 | 597.00 | 36.60 | 457.20 | 469.90 | 63.50 | 63.50 | 539.80 | 28.50 | 16 | 1″ | 47 | 103 |
| 18″ | 450 | 635.00 | 39.60 | 505.00 | 533.40 | 68.30 | 68.30 | 577.90 | 31.80 | 16 | 1 1/8″ | 57 | 126 |
| 20″ | 500 | 698.50 | 42.90 | 558.80 | 584.20 | 73.20 | 73.20 | 635.00 | 31.80 | 20 | 1 1/8″ | 76 | 167 |
| 24″ | 600 | 813.00 | 47.80 | 663.40 | 692.20 | 82.60 | 82.60 | 749.30 | 35.10 | 20 | 1 1/4″ | 97 | 214 |
| Nominal Size | Outside Diameter (OD) |
Min. Thickness (T) |
RF Dia. (R) |
No. of Bolt Holes | Diameter of Holes | Bolt Circle (BC) |
SO Bore ID (SB) |
WN Bore ID (WB) |
Dia. Hub Base (HB) |
Dia. of Hub Top (HT) |
SO LTH (SL) |
WN LTH (WL) |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1⁄2 | 3.50 | 0.38 | 1.38 | 4 | 0.62 | 2.38 | 0.88 | 0.62 | 1.19 | 0.84 | 0.56 | 1.81 |
| 3⁄4 | 3.88 | 0.44 | 1.69 | 4 | 0.62 | 2.75 | 1.09 | 0.82 | 1.50 | 1.05 | 0.56 | 2.00 |
| 1 | 4.25 | 0.50 | 2.00 | 4 | 0.62 | 3.12 | 1.36 | 1.05 | 1.94 | 1.32 | 0.62 | 2.12 |
| 11⁄4 | 4.62 | 0.56 | 2.50 | 4 | 0.62 | 3.50 | 1.70 | 1.38 | 2.31 | 1.66 | 0.75 | 2.19 |
| 11⁄2 | 5.00 | 0.62 | 2.88 | 4 | 0.62 | 3.88 | 1.95 | 1.61 | 2.56 | 1.90 | 0.81 | 2.38 |
| 2 | 6.00 | 0.69 | 3.62 | 4 | 0.75 | 4.75 | 2.44 | 2.07 | 3.06 | 2.38 | 0.94 | 2.44 |
| 21⁄2 | 7.00 | 0.81 | 4.12 | 4 | 0.75 | 5.50 | 2.94 | 2.47 | 3.56 | 2.88 | 1.06 | 2.69 |
| 3 | 7.50 | 0.88 | 5.00 | 4 | 0.75 | 6.00 | 3.57 | 3.07 | 4.25 | 3.50 | 1.12 | 2.69 |
| 31⁄2 | 8.50 | 0.88 | 5.50 | 8 | 0.75 | 7.00 | 4.07 | 3.55 | 4.81 | 4.00 | 1.19 | 2.75 |
| 4 | 9.00 | 0.88 | 6.19 | 8 | 0.75 | 7.50 | 4.57 | 4.03 | 5.31 | 4.50 | 1.25 | 2.94 |
| 5 | 10.00 | 0.88 | 7.31 | 8 | 0.88 | 8.50 | 5.66 | 5.05 | 6.44 | 5.56 | 1.38 | 3.44 |
| 6 | 11.00 | 0.94 | 8.50 | 8 | 0.88 | 9.50 | 6.72 | 6.07 | 7.56 | 6.63 | 1.50 | 3.44 |
| 8 | 13.50 | 1.06 | 10.62 | 8 | 0.88 | 11.75 | 8.72 | 7.98 | 9.69 | 8.63 | 1.69 | 3.94 |
| 10 | 16.00 | 1.12 | 12.75 | 12 | 1.00 | 14.25 | 10.88 | 10.02 | 12.00 | 10.75 | 1.88 | 3.94 |
| 12 | 19.00 | 1.19 | 15.00 | 12 | 1.00 | 17.00 | 12.88 | 12.00 | 14.38 | 12.75 | 2.12 | 4.44 |
| 14 | 21.00 | 1.31 | 16.25 | 12 | 1.12 | 18.75 | 14.14 | 13.25 | 15.75 | 14.00 | 2.19 | 4.94 |
| 16 | 23.50 | 1.38 | 18.50 | 16 | 1.12 | 21.25 | 16.16 | 15.25 | 18.00 | 16.00 | 2.44 | 4.94 |
| 18 | 25.00 | 1.50 | 21.00 | 16 | 1.25 | 22.75 | 18.18 | 17.25 | 19.88 | 18.00 | 2.62 | 5.44 |
| 20 | 27.50 | 1.62 | 23.00 | 20 | 1.25 | 25.00 | 20.20 | 19.25 | 22.00 | 20.00 | 2.81 | 5.62 |
| 22 | 29.50 | 1.75 | 25.25 | 20 | 1.38 | 27.25 | 22.22 | 21.25 | 24.25 | 22.00 | 3.07 | 5.82 |
| 24 | 32.00 | 1.81 | 27.25 | 20 | 1.38 | 29.50 | 24.25 | 23.25 | 26.12 | 24.00 | 3.19 | 5.94 |
| Size in Inch | Size in mm | No of Bolts | Outer Dia. | Hub OD | ISO Stud Size | Flange Length | RF Height | Flange Thick. | RF Dia. | PCD | Hole Size | Socket Bore | Weight in kg |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| A | C | D | F | B | E | G | H | ||||||
| 1/2 | 15 | 4 | 90 | 30 | M14 | 14 | 2 | 9.6 | 34.9 | 60.3 | 5/8 | 22.2 | 0.8 |
| 1 | 25 | 4 | 110 | 49 | M14 | 16 | 2 | 12.7 | 50.8 | 79.4 | 5/8 | 34.5 | 0.9 |
| 3/4 | 20 | 4 | 100 | 38 | M14 | 14 | 2 | 11.2 | 42.9 | 69.9 | 5/8 | 27.7 | 0.9 |
| 1 1/4 | 32 | 4 | 115 | 59 | M14 | 19 | 2 | 14.3 | 63.5 | 88.9 | 5/8 | 43.2 | 1.4 |
| 2 | 50 | 4 | 150 | 78 | M16 | 24 | 2 | 17.5 | 92.1 | 120.7 | 3/4 | 61.9 | 2.3 |
| 1 1/2 | 40 | 4 | 125 | 65 | M14 | 21 | 2 | 15.9 | 73 | 98.4 | 5/8 | 49.5 | 1.4 |
| 2 1/2 | 65 | 4 | 180 | 90 | M16 | 27 | 2 | 20.7 | 104.8 | 139.7 | 3/4 | 74.6 | 3.2 |
| 3 | 80 | 4 | 190 | 108 | M16 | 29 | 2 | 22.3 | 127 | 152.4 | 3/4 | 90.7 | 3.7 |
| 4 | 100 | 8 | 230 | 135 | M16 | 32 | 2 | 22.3 | 157.2 | 190.5 | 3/4 | 116.1 | 5.9 |
| 3 1/2 | 90 | 8 | 215 | 122 | M16 | 30 | 2 | 22.3 | 139.7 | 177.8 | 3/4 | 103.4 | 5 |
| 5 | 125 | 8 | 255 | 164 | M20 | 35 | 2 | 22.3 | 185.7 | 215.9 | 7/8 | 143.8 | 6.8 |
| 8 | 200 | 8 | 345 | 246 | M20 | 43 | 2 | 27 | 269.9 | 298.5 | 7/8 | 221.5 | 13.7 |
| 10 | 250 | 12 | 405 | 305 | M24 | 48 | 2 | 28.6 | 323.8 | 362 | 1 | 276.2 | 19.5 |
| 6 | 150 | 8 | 280 | 192 | M20 | 38 | 2 | 23.9 | 215.9 | 241.3 | 7/8 | 170.7 | 8.6 |
| 12 | 300 | 12 | 485 | 365 | M24 | 54 | 2 | 30.2 | 381 | 431.8 | 1 | 327 | 29 |
| 24 | 600 | 20 | 815 | 663 | M33 | 81 | 2 | 46.1 | 692.2 | 749.3 | 1 3/8 | 616 | 100 |
| 16 | 400 | 16 | 595 | 457 | M27 | 62 | 2 | 35 | 469.9 | 539.8 | 1 1/8 | 410.5 | 54 |
| 18 | 450 | 16 | 635 | 505 | M30 | 67 | 2 | 38.1 | 533.4 | 577.9 | 1 1/4 | 461.8 | 59 |
| 14 | 350 | 12 | 535 | 400 | M27 | 56 | 2 | 33.4 | 412.8 | 476.3 | 1 1/8 | 359.2 | 41 |
| 20 | 500 | 20 | 700 | 559 | M30 | 71 | 2 | 41.3 | 584.2 | 635 | 1 1/4 | 513.1 | 75 |
| Size in Inch | Size in mm | ISO Stud Size | RF Height | Outer Dia. | RF Dia. | Hole Size | PCD | No of Bolts | Bolt Size UNC | Flange Thickness | RF Stud Length | Weight in kg |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| D | A | C | E | B | ||||||||
| 1/2 | 15 | M20 | 7 | 135 | 34.9 | 7/8 | 88.9 | 4 | 3/4 | 30.2 | 120 | 3.2 |
| 3/4 | 20 | M20 | 7 | 140 | 42.9 | 7/8 | 95.2 | 4 | 3/4 | 31.8 | 125 | 3.7 |
| 1 | 25 | M24 | 7 | 160 | 50.8 | 1 | 108 | 4 | 7/8 | 35 | 140 | 5 |
| 1 1/4 | 32 | M27 | 7 | 185 | 63.5 | 1 1/8 | 130.2 | 4 | 1 | 38.1 | 150 | 7.8 |
| 1 1/2 | 40 | M30 | 7 | 205 | 73 | 1 1/4 | 146 | 4 | 1 1/8 | 44.5 | 170 | 10.5 |
| 2 | 50 | M27 | 7 | 235 | 92.1 | 1 1/8 | 171.4 | 8 | 1 | 50.9 | 180 | 18 |
| 2 1/2 | 65 | M30 | 7 | 265 | 104.8 | 1 1/4 | 196.8 | 8 | 1 1/8 | 57.2 | 195 | 25.5 |
| 3 | 80 | M33 | 7 | 305 | 127 | 1 3/8 | 228.6 | 8 | 1 1/4 | 66.7 | 220 | 39 |
| 4 | 100 | M39 | 7 | 355 | 157.2 | 1 5/8 | 273 | 8 | 1 1/2 | 76.2 | 255 | 61.5 |
| 5 | 125 | M45 | 7 | 420 | 185.7 | 1 7/8 | 323.8 | 8 | 1 3/4 | 92.1 | 300 | 102 |
| 6 | 150 | M52 | 7 | 485 | 215.9 | 2 1/8 | 368.3 | 8 | 2 | 108 | 345 | 157 |
| 8 | 200 | M52 | 7 | 550 | 269.9 | 2 1/8 | 438.2 | 12 | 2 | 127 | 380 | 241 |
| 10 | 250 | M64 | 7 | 675 | 323.8 | 2 5/8 | 539.8 | 12 | 2 1/2 | 165.1 | 490 | 470 |
| 12 | 300 | M72 | 7 | 760 | 381 | 2 7/8 | 619.1 | 12 | 2 3/4 | 184.2 | 540 | 575 |
| NPS Of SWRF | Outer Diameter | Diameter of RF | Minimum Thickness | Hub Diameter | Bore Diameter | Socket Depth | Bolt Circle Diameter | Bolt Holes Diameter | Flanges Bolt Number |
|---|---|---|---|---|---|---|---|---|---|
| (NPS) | (O) | (R) | (tf) | (X) | (B1) | (B2) | (D) | (W) | (I) |
| 1/2 | 90 | 34.9 | 9.6 | 30 | 22.2 | 15.8 | 10 | 60.3 | 15.9 |
| 3/4 | 100 | 42.9 | 11.2 | 38 | 27.7 | 20.9 | 11 | 69.9 | 15.9 |
| 1 | 110 | 50.8 | 12.7 | 49 | 34.5 | 26.6 | 13 | 79.4 | 15.9 |
| 1 1/4 | 115 | 63.5 | 14.3 | 59 | 43.2 | 35.1 | 14 | 88.9 | 15.9 |
| 1 1/2 | 125 | 73.0 | 15.9 | 65 | 49.5 | 40.9 | 16 | 98.4 | 15.9 |
| 2 | 150 | 92.1 | 17.5 | 78 | 61.9 | 52.5 | 17 | 120.7 | 19.1 |
| 2 1/2 | 180 | 104.8 | 20.7 | 90 | 74.6 | 62.7 | 19 | 139.7 | 19.1 |
| 3 | 190 | 127.0 | 22.3 | 108 | 90.7 | 77.9 | 21 | 152.4 | 19.1 |
| Size in MM | Inner Diameter | Outer Diameter | Center to Center | Wall Thickness | Width Of Web | Thickness Of Web | Hole Diameter |
|---|---|---|---|---|---|---|---|
| 15 | 16 | 45 | 60 | 3 | 38 | 2 | 15.875 |
| 20 | 21 | 54 | 70 | 3 | 38 | 2 | 15.875 |
| 25 | 27 | 64 | 80 | 3 | 38 | 2 | 15.875 |
| 32 | 42 | 73 | 90 | 6.4 | 38 | 4 | 15.875 |
| 40 | 48 | 83 | 100 | 6.4 | 38 | 4 | 15.875 |
| 50 | 61 | 102 | 120 | 6.4 | 51 | 4 | 19.05 |
| 65 | 73 | 107 | 140 | 6.4 | 51 | 4 | 19.05 |
| 80 | 89 | 133 | 150 | 6.4 | 64 | 4 | 19.05 |
| 90 | 102 | 159 | 175 | 9.7 | 64 | 5 | 19.05 |
| 100 | 114 | 172 | 190 | 9.7 | 64 | 5 | 19.05 |
| 130 | 141 | 194 | 215 | 9.7 | 76 | 5 | 22.225 |
| 150 | 168 | 219 | 240 | 12.7 | 76 | 7 | 22.225 |
| 200 | 219 | 276 | 300 | 12.7 | 76 | 10 | 22.225 |
| 250 | 273 | 337 | 360 | 15.7 | 102 | 12 | 25.4 |
| 300 | 324 | 406 | 430 | 19.1 | 102 | 15 | 25.4 |
| 350 | 356 | 448 | 475 | 19.1 | 108 | 15 | 28.575 |
| 400 | 406 | 511 | 540 | 22.4 | 108 | 17 | 28.575 |
| 450 | 457 | 546 | 580 | 25.4 | 114 | 20 | 31.75 |
| 500 | 508 | 603 | 635 | 28.4 | 121 | 22 | 31.75 |
| 600 | 610 | 714 | 750 | 31.8 | 140 | 24 | 34.925 |
| Flange | Tolerance Table | |
|---|---|---|
| D | Inside Diameter (I.D.) |
|
| K | Length of hub |
|
| B | Diameter of contact face |
|
| A | O.D. (Outside Diameter) |
|
| J | Diameter of hub at base |
|
| P | Drilling |
|
| Eccentricity of bolt circle with respect to facing |
|
|
| H | Diameter of hub at point of welding |
|
| C | Thickness |
|
| ASME/ ANSI B16.5 | Pressure Rating | ||||||
|---|---|---|---|---|---|---|---|
| Temperature °F | Class 150 | Class 300 | Class 400 | Class 600 | Class 900 | Class 1500 | Class 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 |