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20" WN-SG A105N CL.300 SCH.40 B16.5 Carbon Steel Weld Neck Small Groove Flange
Product Information
| Product Name | 20" WN-SG A105N CL.300 SCH.40 B16.5 Carbon Steel Weld Neck Small Groove Flange |
| Size Range | 20“ |
| Pressure Class | Class 300 |
| Standards | ASTM A105N |
| Face Type | WN-SG Weld Neck Small Groove |
| Specification | ANSI B16.5 |
| Coating | Anti-rust Paint, Could and Hot Dip Galvanized, Zinc Plated, Yellow Transparent, Oil Black Paint |
Face Type: Groove
Connections made with flanges help in creating an efficient channel to transport fluids and gases in the industry. The Groove Flange are self-aligning flanges that don’t make any contact with the fluid or gas in the respective pipe or tube. They can be attached to the pipe without requiring a welding process.
Flange Type: Weld Neck (WN)
A weld neck flange, also called a tapered hub flange or high-hub flange, is a kind of flange that can relocate stress to the pipes, ensuring a decrease in high-stress concentration at the bottom of the flange. There are two welding neck flanges designs – the first type is used with pipes while the second, longer type cannot be used with pipes but with a process plant. The weld neck flange comprises of a round fitting that extends beyond the rim of the circumference. These flanges, typically manufactured from forging, are actually welded to pipes.
ASTM A105/A105N
ASTM A105 flanges are forged carbon steel flanges for ambient-and higher-temperature service in pressure systems. These flanges may be manufactured in accordance with a variety of standard specifications covering ASME B16.5, ASME B16.47, ASME B16.48, ASME B16.36, MSS SP 44, API 605, and API 6A, etc. Flanges made to ASTM A105 material are limited a maximum weight of 4540 kg.
ASTM A105 and A105N steel flanges are not same, they have same raw materials, same steel grades, but different heat treatment requirement. N means Normalization heat treatment, and A105 flange haves no heat treatment requirement. In summary, the ASTM A105 flange and ASTM A105N flange have a same chemical composition, but the A105N have a better mechanical property and usually used in critical situation.
ASTM A105 Chemical Composition (%)
| Steel Class | C max | Si | Mn | P max | S max | Ni max | Cr max | Mo max | V max |
| A105 | 0.35 | 0.10-0.35 | 0.60-1.05 | 0.035 | 0.040 | 0.40 | 0.30 | 0.12 | 0.08 |
ASTM A105 Mechanical Properties
| Steel Class | Tensile Strength min (MPa) | Yield Strength min (MPa) | Elongation min (%) | Reduction of Area min (%) | Hardness (HBW) |
| A105 | 485 | 250 | 22 | 30 | 137-187 |
ANSI B16.5 Flange Dimensions - Class 300
| Nominal Size | Outside Dia. | Thickness | Length thru Hub | Dia. of Hub | Raised Face Dia. | Corner Radius of Bore | Depth of Socket | Counter Bore | Thread Length | Bolt Holes | |||||
| WN | SO SW TR | LJ | LJ | SW | TR | Bolt Circle Dia. | No | Dia. | |||||||
| A | B | O | t | Y1 | Y2 | Y3 | X | R | r1 | D | B4 | Q | C | H | |
| 15 | 1/2 | 95 | 14.3 | 52.3 | 22 | 38.0 | 35.1 | 3 | 10 | 23.5 | 15.7 | 66.5 | 4 | 16 | |
| 20 | 3/4 | 117 | 15.8 | 57.2 | 25 | 48.0 | 42.9 | 3 | 11 | 29.0 | 15.7 | 82.6 | 4 | 19 | |
| 25 | 1 | 124 | 17.6 | 62.0 | 27 | 54.0 | 50.8 | 3 | 13 | 36.0 | 17.5 | 88.9 | 4 | 19 | |
| 32 | 1-1/4 | 133 | 19.1 | 65.0 | 27 | 63.4 | 63.5 | 5 | 14 | 44.5 | 20.6 | 98.6 | 4 | 19 | |
| 40 | 1-1/2 | 155 | 20.6 | 6.3 | 30 | 70.0 | 73.2 | 6 | 16 | 50.5 | 22.4 | 114.3 | 4 | 22 | |
| 50 | 2 | 165 | 22.4 | 69.8 | 33 | 84.0 | 91.9 | 8 | 18 | 63.5 | 28.4 | 127.0 | 8 | 19 | |
| 65 | 2-/21 | 190 | 25.4 | 76.2 | 38 | 100 | 104.6 | 8 | 19 | 76.0 | 31.8 | 149.4 | 8 | 22 | |
| 80 | 3 | 210 | 28.5 | 79.2 | 43 | 117 | 127.0 | 10 | 21 | 92.0 | 31.8 | 168.1 | 8 | 22 | |
| 90 | 3-1/2 | 229 | 30.3 | 81.0 | 44 | 133 | 139.7 | 10 | 105.0 | 36.6 | 184.2 | 8 | 22 | ||
| 100 | 4 | 254 | 31.8 | 85.9 | 48 | 146 | 157.2 | 11 | 118.0 | 36.6 | 200.2 | 8 | 22 | ||
| 125 | 5 | 279 | 35.1 | 98.6 | 51 | 178 | 185.7 | 11 | 145.0 | 42.9 | 235.0 | 8 | 22 | ||
| 150 | 6 | 318 | 36.6 | 98.6 | 52 | 206 | 215.9 | 13 | 171.0 | 46.0 | 269.7 | 12 | 22 | ||
| 200 | 8 | 381 | 41.2 | 111.3 | 62 | 260 | 269.7 | 13 | 222.0 | 50.8 | 330.2 | 12 | 26 | ||
| 250 | 10 | 444 | 47.8 | 117.3 | 67 | 95 | 321 | 323.8 | 13 | 276.0 | 55.6 | 387.4 | 16 | 29 | |
| 300 | 12 | 520 | 50.8 | 130.0 | 73 | 102 | 375 | 381.0 | 13 | 329.0 | 60.5 | 450.8 | 16 | 32 | |
| 350 | 14 | 585 | 53.9 | 142.7 | 76 | 111 | 425 | 412.8 | 13 | 360.0 | 63.5 | 514.4 | 20 | 32 | |
| 400 | 16 | 650 | 57.2 | 146.0 | 83 | 121 | 483 | 469.9 | 13 | 411.0 | 68.3 | 571.5 | 20 | 35 | |
| 450 | 18 | 710 | 60.5 | 158.8 | 89 | 130 | 533 | 533.4 | 13 | 462.0 | 69.8 | 628.6 | 24 | 35 | |
| 500 | 20 | 775 | 63.5 | 162.1 | 95 | 140 | 587 | 584.2 | 13 | 513.0 | 73.2 | 685.8 | 24 | 35 | |
| 600 | 24 | 915 | 69.9 | 168.1 | 106 | 152 | 702 | 692.2 | 13 | 614.0 | 82.6 | 812.8 | 24 | 42 | |
| Nominal Size | Dimensions of Ring Joint Flanges | Weight (kg) | |||||||||||
| Groove Number | Dia. of Raised Portion | Pitch Dia. | Depth | Width | Radius at Bottom | WN Sch 40 | SO | BL | SW Sch 40 | LJ | TR | ||
| A | B | K | P | E | F | r2 | |||||||
| 15 | 1/2 | R11 | 51.0 | 34.14 | 5.56 | 7.14 | 0.8 | 0.75 | 0.65 | 0.65 | 0.66 | 0.71 | 0.65 |
| 20 | 3/4 | R13 | 63.5 | 42.88 | 6.35 | 8.74 | 0.8 | 1.27 | 1.11 | 1.11 | 1.14 | 1.20 | 1.10 |
| 25 | 1 | R16 | 70.0 | 50.80 | 6.35 | 8.74 | 0.8 | 1.64 | 1.39 | 1.43 | 1.43 | 1.49 | 1.35 |
| 32 | 1-1/4 | R18 | 79.5 | 60.32 | 6.35 | 8.74 | 0.8 | 2.07 | 1.70 | 1.83 | 1.75 | 1.81 | 1.69 |
| 40 | 1-1/2 | R20 | 90.5 | 68.28 | 6.35 | 8.74 | 0.8 | 2.94 | 2.51 | 2.69 | 2.58 | 2.66 | 2.54 |
| 50 | 2 | R23 | 108 | 82.55 | 7.92 | 11.91 | 0.8 | 3.45 | 2.91 | 3.22 | 2.97 | 3.02 | 2.92 |
| 65 | 2-/21 | R26 | 127 | 101.60 | 7.92 | 11.91 | 0.8 | 5.10 | 4.22 | 4.86 | 4.41 | 4.37 | 4.24 |
| 80 | 3 | R31 | 147 | 123.82 | 7.92 | 11.91 | 0.8 | 6.25 | 5.88 | 6.83 | 6.15 | 6.04 | 5.94 |
| 90 | 3-1/2 | R34 | 159 | 131.78 | 7.92 | 11.91 | 0.8 | 8.78 | 7.44 | 8.85 | 7.64 | 7.90 | |
| 100 | 4 | R37 | 175 | 149.22 | 7.92 | 11.91 | 0.8 | 11.4 | 9.73 | 11.8 | 9.98 | 9.71 | |
| 125 | 5 | R41 | 210 | 180.98 | 7.92 | 11.91 | 0.8 | 15.4 | 12.5 | 15.8 | 12.7 | 12.4 | |
| 150 | 6 | R45 | 242 | 211.12 | 7.92 | 11.91 | 0.8 | 19.8 | 16.2 | 21.3 | 16.5 | 16.2 | |
| 200 | 8 | R49 | 302 | 269.88 | 7.92 | 11.91 | 0.8 | 30.5 | 24.8 | 34.6 | 25.2 | 24.8 | |
| 250 | 10 | R53 | 356 | 323.85 | 7.92 | 11.91 | 0.8 | 44.1 | 35.5 | 54 | 40.2 | 35.9 | |
| 300 | 12 | R57 | 413 | 381.00 | 7.92 | 11.91 | 0.8 | 64 | 51 | 79 | 58 | 51.5 | |
| 350 | 14 | R61 | 458 | 419.90 | 7.92 | 11.91 | 0.8 | 88 | 70 | 106 | 86.2 | 70.1 | |
| 400 | 16 | R65 | 508 | 469.90 | 7.92 | 11.91 | 0.8 | 113 | 90 | 139 | 113.4 | 90.4 | |
| 450 | 18 | R69 | 575 | 533.40 | 7.92 | 11.91 | 0.8 | 138 | 109 | 175 | 133.8 | 109.0 | |
| 500 | 20 | R73 | 635 | 584.20 | 9.52 | 13.49 | 1.5 | 169 | 135 | 221 | 167.8 | 136.0 | |
| 600 | 24 | R77 | 750 | 692.15 | 11.13 | 16.66 | 1.5 | 249 | 204 | 341 | 249.5 | 204.0 | |
ASME B16.5 Tongue & Groove Flange Dimensions (mm)
| DN | d1 | d2 | d3 | d4 | d5 | d6 | d7 | d8 | f1 | f2 |
| ½” | 35.1 | 36.6 | 35.1 | 36.6 | 25.4 | 23.9 | 46.0 | 44.5 | 6.4 | 4.8 |
| ¾” | 42.9 | 44.5 | 42.9 | 44.5 | 33.3 | 31.8 | 53.8 | 52.3 | 6.4 | 4.8 |
| 1” | 50.8 | 52.3 | 47.7 | 49.3 | 38.1 | 36.6 | 62.0 | 57.2 | 6.4 | 4.8 |
| 1¼” | 63.5 | 65.0 | 57.2 | 58.7 | 47.8 | 46.0 | 74.7 | 66.6 | 6.4 | 4.8 |
| 1½” | 73.2 | 74.7 | 63.5 | 65.0 | 53.8 | 52.3 | 84.1 | 73.2 | 6.4 | 4.8 |
| 2” | 92.0 | 93.7 | 82.6 | 84.1 | 73.0 | 71.4 | 103.1 | 92.0 | 6.4 | 4.8 |
| 2½” | 104.6 | 106.4 | 95.2 | 96.8 | 85.8 | 84.1 | 115.8 | 104.6 | 6.4 | 4.8 |
| 3” | 127.0 | 128.5 | 117.5 | 119.1 | 108.0 | 106.4 | 138.2 | 127.0 | 6.4 | 4.8 |
| 4” | 157.2 | 158.8 | 144.5 | 146.1 | 131.8 | 130.0 | 168.1 | 157.2 | 6.4 | 4.8 |
| 5” | 185.7 | 187.5 | 173.0 | 174.8 | 160.3 | 148.8 | 196.9 | 185.7 | 6.4 | 4.8 |
| 6” | 215.9 | 217.5 | 203.2 | 204.7 | 190.5 | 189.0 | 227.0 | 215.9 | 6.4 | 4.8 |
| 8” | 269.8 | 271.5 | 254.0 | 255.5 | 238.3 | 236.5 | 281.0 | 269.8 | 6.4 | 4.8 |
| 10” | 323.5 | 325.4 | 304.8 | 306.3 | 285.8 | 284.2 | 335.0 | 323.5 | 6.4 | 4.8 |
| 12” | 381.0 | 328.5 | 362.0 | 363.5 | 342.9 | 341.4 | 392.2 | 381.0 | 6.4 | 4.8 |
| 14” | 412.8 | 414.3 | 393.7 | 395.2 | 374.7 | 373.1 | 423.9 | 412.8 | 6.4 | 4.8 |
| 16” | 469.9 | 471.5 | 447.6 | 449.3 | 425.5 | 423.9 | 481.0 | 469.9 | 6.4 | 4.8 |
| 18” | 533.4 | 535.0 | 511.0 | 512.8 | 489.0 | 487.4 | 544.6 | 533.4 | 6.4 | 4.8 |
| 20” | 584.2 | 585.8 | 448.8 | 560.3 | 533.4 | 531.9 | 595.4 | 584.2 | 6.4 | 4.8 |
| 24” | 692.2 | 693.7 | 666.8 | 668.3 | 641.4 | 639.8 | 703.3 | 692.2 | 6.4 | 4.8 |
