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DIN86029 Stainless Steel Weld Neck Flange Schedule Chart, MSS SP-44 Forged Carbon Steel WNRF Flange Pressure Ratings.


Welding Neck Flanges are probably the most easiest to recognize amongst the various types of flanges available in the market. The ASME B16.5 Weld Neck Flange is produced with a long tapered hub, which transitions gradually over to the wall thickness from a pipe or fitting.


The long tapered hub present on the ASME B16.5 Carbon Steel Weld Neck Flange is what provides an important reinforcement to this component. This reinforcement provided by the flanges is useful in several applications involving high pressure as well as sub-zero and / or elevated temperatures. Therefore Alloy Steel 150 Welding Neck Flange is used across a wide range of industries. The smooth transition from flanges thickness to pipe wall thickness or fitting wall thickness effected by the taper is extremely beneficial, especially under conditions, where repeated bending may occur. The bending could be caused by either line expansion or other variable forces.


ASME B16.5 Weld Neck Flange
ASME B16.5 Weld Neck Flange
ANSI B16.5 Stainless Steel WNRF Flange
ANSI B16.5 Stainless Steel WNRF Flange
Carbon Steel Welding Neck Flange
Carbon Steel Welding Neck Flange


We Are Famed As The Most Trusted Alloy Steel 150 Welding Neck Flange ANSI B16.5 Manufacturers In India, Check Reducing Weld Neck Flange Dimensions Class 300, ASME B16.5 Carbon Steel Weld Neck Flange At Low Price If Buying In India.


What Is ASME B16.5 Weld Neck Flange?


The Stainless Steel Weld Neck Flange is bored to match the inside diameter of the mating pipe or fitting. Since the bores of both flanges and pipe match, there will be an unrestricted flow of product. This, in turn, is what prevents turbulence at the joint, while also reducing erosion. The flange also provides excellent stress distribution through the tapered hub. Moreover, these flanges are easily radiographed for flaw detection. The ASME B16.5 - 1996 Pipe Flanges and Flange Fittings standard envelopes pressure-temperature ratings, materials, ANSI B16.5 WNRF Flange Dimensions, tolerances, marking, testing, as well as methods of designating openings for pipe flanges and flanged fittings.


The standard includes flanges with 4 inch Weld Neck Pipe Flanges Pressure Rating class designations 150, 300, 400, 600, 900, 1500 and 2500.


ANSI B16.5 WNRF Flange Specification


Specification : ASME B16.5 Weld Neck Flange
Connect Type Type: RF, FF, RTJ, LMF, SMF, LJF.
ASA Flange Size Chart : 1/2″ (15 NB) To 48″ (1200NB)
Flange Standards : ASME B16.5, ASME B16.47 (Series A, Series B), ASME B16.38, EN-1092, BS10, DIN, PN, JIS, ISO, GOST, UNI, AWWA, MSS SP44.
Flange Machining Equipment: Bending machine, Pushing Machine, Sand-blasting machine, Press machine, electric bevelling machine etc
Flange Production Process: Forged, Heat Treated and Machined
Design For Size: ASA, ASME, DIN, PN, JIS, ANSI, BS, EN
ASME B16.5 Flange Application: Oil And Gas Industry
Chemical Industry
Natural Gas Industry
Water Pipeline Industry
Fabrication Industry
Nuclear Power Plant
Flange Pressure Rating Table: Class 150 LBS, Class 300 LBS, Class 600 LBS, Class 900 LBS, Class 1500 LBS, Class 2500 LBS
Coating Flange Faces : Yellow Transparent, Oil Black Paint, Anti-rust Paint, Cold and Hot Dip Galvanized, Zinc Plated

Raised Face Weld Neck Flange Schedule


Welding Neck Flange Bores (in inch)
NPS O
D
Sch
10
Sch
20
Sch
30
Std.
Wall
Sch
40
Sch
60
Extra
Strong
Sch
80
Sch
100
Sch
120
Sch
140
Sch
160
Double
Extra
Strong
1/2” 0.840 0.674 0.622 0.622 0.546 0.546 0.464 0.252
3/4” 1.050 0.884 0.824 0.824 0.742 0.742 0.612 0.434
1” 1.315 1.097 1.049 1.049 0.957 0.957 0.815 0.599
1.1/4” 1.660 1.442 1.380 1.380 1.278 1.278 1.160 0.896
1.1/2” 1.900 1.682 1.610 1.610 1.500 1.500 1.338 1.100
2” 2.375 2.157 2.067 2.067 1.939 1.939 1.687 1.503
2.1/2” 2.875 2.635 2.469 2.469 2.323 2.323 2.125 1.771
3” 3.500 3.260 3.068 3.068 2.900 2.900 2.624 2.300
3-1/2” 4.000 3.760 3.548 3.548 3.364 3.364 2.728
4” 4.500 4.260 4.026 4.026 3.826 3.826 3.624 3.438 3.152
5” 5.563 5.295 5.047 5.047 4.813 4.813 4.563 4.313 4.063
6” 6.625 6.357 6.065 6.065 5.761 5.761 5.501 5.187 4.897
8” 8.625 8.329 8.125 8.071 7.981 7.981 7.813 7.625 7.625 7.437 7.187 7.001 6.813 6.875
10” 10.750 10.420 10.250 10.136 10.020 10.020 9.750 9.750 9.562 9.312 9.062 8.750 8.500 8.750
12” 12.750 12.390 12.250 12.090 12.000 11.938 11.626 11.750 11.374 11.062 10.750 10.500 10.126 10.750
14” 14.000 13.500 13.376 13.250 13.250 13.124 12.812 13.000 12.500 12.124 11.814 11.500 11.188
16” 16.000 15.500 15.376 15.250 15.250 15.000 14.688 15.000 14.312 13.938 13.564 13.124 12.812
18” 18.000 17.500 17.376 17.124 17.250 16.876 16.500 17.000 16.124 15.688 15.250 14.876 14.438
20” 20.000 19.500 19.250 19.000 19.250 18.812 18.376 19.000 17.938 17.438 17.000 16.500 16.062
24” 24.000 23.500 23.250 22.876 23.250 22.624 22.062 23.000 21.562 20.938 20.376 19.876 19.312
30” 30.000 29.376 29.000 28.750 29.250 29.000
36” 36.000 35.376 35.000 34.750 35.250 34.500 35.000
42” 42.000 41.250 41.000

Sch 40 Weld Neck Flange Pressure Ratings


ANSI B16.5 Sch 40 Weld Neck Flanges Pressure Ratings
NPS 150LBS 300LBS 600LBS 900LBS 1500LBS 2500LBS
WN S/O B/K WN S/O B/K WN S/O B/K WN S/O B/K WN S/O B/K WN S/O B/K
1/2” 0.7 0.4 0.5 0.8 0.7 0.8 0.9 0.8 0.8 2.1 1.8 1.9 2.1 1.8 1.9 3.2 3 3
3/4” 0.8 0.7 0.8 1.4 1.2 1.2 1.6 1.4 1.4 2.7 2.4 2.7 2.7 2.4 2.7 3.6 4 4.5
1” 1.1 0.8 0.9 1.7 1.4 1.5 1.9 1.7 1.7 3.9 3.6 3.7 3.9 3.6 3.7 5.4 5 5
1.1/4” 1.5 1.2 1.3 2.2 1.8 2 2.6 2.1 2.4 4.5 4.1 4.3 4.5 4.1 4.3 7.8 8 8
1.1/2” 1.8 1.4 1.6 3.2 2.7 2.9 3.6 3.1 3.4 6.2 5.4 5.9 6.2 5.4 5.9 11.5 11 11
2” 2.7 2.2 2.6 3.6 3.2 3.5 4.7 3.9 4.4 11.3 10.5 11.3 11.3 10.5 11.3 19 17 17
2.1/2” 4.4 3.5 4.1 5.4 4.5 5.3 4.8 5.4 6.8 16.3 15.8 16 16.3 15.8 16 24 25 25
3” 5.2 3.8 5.1 7.3 5.9 7.2 8.7 7.3 8.9 15 12.3 16.8 21 21.5 19.5 42.6 38 39
3-1/2” 6.4 5 6.5 8.9 7.5 9.2 11.6 9 12.7
4” 7.5 5.6 7.5 11.8 10 12.2 18.4 16.5 18.6 24 23.2 24.5 31.8 31 33 64 58 60
5” 9.2 6.5 9.2 16 12.5 16 31 28.5 30.8 38.5 37.5 39.5 59 58.8 60 111 95 101
6” 11.0 8.1 11.8 20.2 16.5 22 37 36.2 38 50 48.3 51.5 72 74 75 171 146 156
8” 18.4 13 20.4 31.2 25.5 36 54.5 51.5 62.2 85 75 89 124 112 125 261 220 242
10” 25.5 18.4 31 44.3 35 55 98.5 76.2 102 123 110 131 207 184 215 485 420 465
12” 37 28.5 47 63.5 52 82.5 105 89.5 132 168 146 187 306 264 316 698 590 665
14” 51 37.5 60 86 73 108 150 102 158 198 172 224 416
16” 61.5 44.5 61 112 88 139 177 150 225 225 192 259 567
18” 71.5 54 93 141 115 178 228 180 285 318 272 383 736
20” 85 72 127 173 139 228 285 231 365 376 330 482 929
24” 119 95 190 248 212 350 372 330 532 680 632 905 1504

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Types Of Stainless Steel Welding Neck Flange


Stainless steel ANSI B16.5 F316 Welding Neck Flange

Stainless steel ANSI B16.5 F316 Welding Neck Flange

ANSI b16.5 Forged Class 150 Weld Neck Pipe Flanges

ANSI b16.5 Forged Class 150 Weld Neck Pipe Flange

ASME B16.5 150LBS Raised Face Weld Neck Flange

ASME B16.5 150LBS Raised Face Weld Neck Flange

PN10 Standard SCH 40 Reducing Weld Neck Flange

PN10 Standard SCH 40 Reducing Weld Neck Flange

2 Inch BS4504 Flat Face Weld Neck Flange

2 Inch BS4504 Flat Face Weld Neck Flange

1/2 To 2/4 Inch Stainless Steel Weld Neck Flange

1/2 To 2/4 Inch Stainless Steel Weld Neck Flange

DIN Standard PN25 Rtj Weld Neck Flange

DIN Standard PN25 Rtj Weld Neck Flange

Forged DN100 Class 300 RF Welding Neck Flange Din En 1092 1

Forged DN100 Class 300 RF Welding Neck Flange Din En 1092 1

SS 400 Forged or Casting Welding Neck Flange 300 Lbs

SS 400 Forged or Casting Welding Neck Flange 300 Lbs

ASME SA-182 Jis 16k Weld Neck Flange

ASME SA-182 Jis 16k Weld Neck Flange

BS10 Table E Weld Neck Flange

BS10 Table E Weld Neck Flange

GOST 12820-80 304 / 304L 5 WNRF Flange Class 150

GOST 12820-80 304 / 304L 5 WNRF Flange Class 150


ANSI 150 Weld Neck Flange Dimensions


ANSI 150 Weld Neck Flange Dimensions

Size in In. Size in Millimeter Outer Diameter (OD) Flange Thick. Hub OD Weld Neck OD Welding Neck Length Bore RF Diameter RF Height PCD Weld Face
A B C D E F G H I J
1/2 15 90 9.6 30 21.3 46 Refer Note 34.9 2 60.3 1.6
3/4 20 100 11.2 38 26.7 51 42.9 2 69.9 1.6
1 25 110 12.7 49 33.4 54 50.8 2 79.4 1.6
1 1/4 32 115 14.3 59 42.2 56 63.5 2 88.9 1.6
1 1/2 40 125 15.9 65 48.3 60 73 2 98.4 1.6
2 50 150 17.5 78 60.3 62 92.1 2 120.7 1.6
2 1/2 65 180 20.7 90 73 68 104.8 2 139.7 1.6
3 80 190 22.3 108 88.9 68 127 2 152.4 1.6
3 1/2 90 215 22.3 122 101.6 70 139.7 2 177.8 1.6
4 100 230 22.3 135 114.3 75 157.2 2 190.5 1.6
5 125 255 22.3 164 141.3 87 185.7 2 215.9 1.6
6 150 280 23.9 192 168.3 87 215.9 2 241.3 1.6
8 200 345 27 246 219.1 100 269.9 2 298.5 1.6
10 250 405 28.6 305 273 100 323.8 2 362 1.6
12 300 485 30.2 365 323.8 113 381 2 431.8 1.6
14 350 535 33.4 400 355.6 125 412.8 2 476.3 1.6
16 400 595 35 457 406.4 125 469.9 2 539.8 1.6
18 450 635 38.1 505 457.2 138 533.4 2 577.9 1.6
20 500 700 41.3 559 508 143 584.2 2 635 1.6
24 600 815 46.1 663 610 151 692.2 2 749.3 1.6

ASTM A105 Weld Neck Flange 300#


Size in In Size in Millimeter (OD) Outer Diameter Flange Thick. Hub OD Weld Neck Outer Diameter Welding Neck Length Bore RF Diameter RF Height PCD Weld Face
A B C D E F G H I J
1/2 15 95 12.7 38 21.3 51 Refer Note 34.9 2 66.7 1.6
3/4 20 115 14.3 48 26.7 56 42.9 2 82.6 1.6
1 25 125 15.9 54 33.4 60 50.8 2 88.9 1.6
1 1/4 32 135 17.5 64 42.2 64 63.5 2 98.4 1.6
1 1/2 40 155 19.1 70 48.3 67 73 2 114.3 1.6
2 50 165 20.7 84 60.3 68 92.1 2 127 1.6
2 1/2 65 190 23.9 100 73 75 104.8 2 149.2 1.6
3 80 210 27 117 88.9 78 127 2 168.3 1.6
3 1/2 90 230 28.6 133 101.6 79 139.7 2 184.2 1.6
4 100 255 30.2 146 114.3 84 157.2 2 200 1.6
5 125 280 33.4 178 141.3 97 185.7 2 235 1.6
6 150 320 35 206 168.3 97 215.9 2 269.9 1.6
8 200 380 39.7 260 219.1 110 269.9 2 330.2 1.6
10 250 445 46.1 321 273 116 323.8 2 387.4 1.6
12 300 520 49.3 375 323.8 129 381 2 450.8 1.6
14 350 585 52.4 425 355.6 141 412.8 2 514.4 1.6
16 400 650 55.6 483 406.4 144 469.9 2 571.5 1.6
18 450 710 58.8 533 457 157 533.4 2 628.6 1.6
20 500 775 62 587 508 160 584.2 2 685.8 1.6
24 600 915 68.3 702 610 167 692.2 2 812.8 1.6

600# Weld Neck Flange Dimensions


Size in In. Size in Millimeter (OD) Outer Diameter Flange Thick. Hub Outer Diameter Weld Neck Outer Diameter Welding Neck Length Bore RF Diameter RF Height PCD Weld Face
A B C D E F G H I J
1/2 15 95 14.3 38 21.3 52 Refer Note 34.9 7 66.7 1.6
3/4 20 115 15.9 48 26.7 57 42.9 7 82.6 1.6
1 25 125 17.5 54 33.4 62 50.8 7 88.9 1.6
1 1/4 32 135 20.7 64 42.2 67 63.5 7 98.4 1.6
1 1/2 40 155 22.3 70 48.3 70 73 7 114.3 1.6
2 50 165 25.4 84 60.3 73 92.1 7 127 1.6
2 1/2 65 190 28.6 100 73 79 104.8 7 149.2 1.6
3 80 210 31.8 117 88.9 83 127 7 168.3 1.6
3 1/2 90 230 35 133 101.6 86 139.7 7 184.2 1.6
4 100 275 38.1 152 114.3 102 157.2 7 215.9 1.6
5 125 330 44.5 189 141.3 114 185.7 7 266.7 1.6
6 150 355 47.7 222 168.3 117 215.9 7 292.1 1.6
8 200 420 55.6 273 219.1 133 269.9 7 349.2 1.6
10 250 510 63.5 343 273 152 323.8 7 431.8 1.6
12 300 560 66.7 400 323.8 156 381 7 489 1.6
14 350 605 69.9 432 355.6 165 412.8 7 527 1.6
16 400 685 76.2 495 406.4 178 469.9 7 603.2 1.6
18 450 745 82.6 546 457 184 533.4 7 654 1.6
20 500 815 88.9 610 508 190 584.2 7 723.9 1.6
24 600 940 101.6 718 610 203 692.2 7 838.2 1.6

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CS WNRF Flange Class 900 Dimensions


Size in In. Size in Millimeter (OD) Outer Diameter Flange Thick. Hub Outer Diameter Weld Neck Outer Diameter Welding Neck Length Bore RF Diameter RF Height PCD Weld Face
A B C D E F G H I J
1/2 15 120 22.3 38 21.3 60 Refer Note 34.9 7 82.6 1.6
3/4 20 130 25.4 44 26.7 70 42.9 7 88.9 1.6
1 25 150 28.6 52 33.4 73 50.8 7 101.6 1.6
1 1/4 32 160 28.6 64 42.2 73 63.5 7 111.1 1.6
1 1/2 40 180 31.8 70 48.3 83 73 7 123.8 1.6
2 50 215 38.1 105 60.3 102 92.1 7 165.1 1.6
2 1/2 65 245 41.3 124 73 105 104.8 7 190.5 1.6
3 80 240 38.1 127 88.9 102 127 7 190.5 1.6
4 100 290 44.5 159 114.3 114 157.2 7 235 1.6
5 125 350 50.8 190 141.3 127 185.7 7 279.4 1.6
6 150 380 55.6 235 168.3 140 215.9 7 317.5 1.6
8 200 470 63.5 298 219.1 162 269.9 7 393.7 1.6
10 250 545 69.9 368 273 184 323.8 7 469.9 1.6
12 300 610 79.4 419 323.8 200 381 7 533.4 1.6
14 350 640 85.8 451 355.6 213 412.8 7 558.8 1.6
16 400 705 88.9 508 406.4 216 469.9 7 616 1.6
18 450 785 101.6 565 457 229 533.4 7 685.8 1.6
20 500 855 108 622 508 248 584.2 7 749.3 1.6
24 600 1040 139.7 749 610 292 692.2 7 901.7 1.6

Class 1500 Weld Neck Flange Dimensions


Size in In. Size in Millimeter (OD) Outer Diameter Flange Thick. Hub Outer Diameter Weld Neck Outer Diameter Welding Neck Length Bore RF Diameter RF Height PCD Weld Face
A B C D E F G H I J
1/2 15 120 22.3 38 21.3 60 Refer Note 34.9 7 82.6 1.6
3/4 20 130 25.4 44 26.7 70 42.9 7 88.9 1.6
1 25 150 28.6 52 33.4 73 50.8 7 101.6 1.6
1 1/4 32 160 28.6 64 42.2 73 63.5 7 111.1 1.6
1 1/2 40 180 31.8 70 48.3 83 73 7 123.8 1.6
2 50 215 38.1 105 60.3 102 92.1 7 165.1 1.6
2 1/2 65 245 41.3 124 73 105 104.8 7 190.5 1.6
3 80 265 47.7 133 88.9 117 127 7 203.2 1.6
4 100 310 54 162 114.3 124 157.2 7 241.3 1.6
5 125 375 73.1 197 141.3 156 185.7 7 292.1 1.6
6 150 395 82.6 229 168.3 171 215.9 7 317.5 1.6
8 200 485 92.1 292 219.1 213 269.9 7 393.7 1.6
10 250 585 108 368 273 254 323.8 7 482.6 1.6
12 300 675 123.9 451 323.8 283 381 7 571.5 1.6
14 350 750 133.4 495 355.6 298 412.8 7 635 1.6
16 400 825 146.1 552 406.4 311 469.9 7 704.8 1.6
18 450 915 162 597 457 327 533.4 7 774.7 1.6
20 500 985 177.8 641 508 356 584.2 7 831.8 1.6
24 600 1170 203.2 762 610 406 692.2 7 990.6 1.6

2500# Weld Neck Flange Dimensions


Size in In. Size in Millimeter (OD) Outer Diameter Flange Thick. Hub Outer Diameter Weld Neck Outer Diameter Welding Neck Length Bore RF Diameter RF Height PCD Weld Face
A B C D E F G H I J
1/2 15 135 30.2 43 21.3 73 Refer Note 34.9 7 88.9 1.6
3/4 20 140 31.8 51 26.7 79 42.9 7 95.2 1.6
1 25 160 35 57 33.4 89 50.8 7 108 1.6
1 1/4 32 185 38.1 73 42.2 95 63.5 7 130.2 1.6
1 1/2 40 205 44.5 79 48.3 111 73 7 146 1.6
2 50 235 50.9 95 60.3 127 92.1 7 171.4 1.6
2 1/2 65 265 57.2 114 73 143 104.8 7 196.8 1.6
3 80 305 66.7 133 88.9 168 127 7 228.6 1.6
4 100 355 76.2 165 114.3 190 157.2 7 273 1.6
5 125 420 92.1 203 141.3 229 185.7 7 323.8 1.6
6 150 485 108 235 168.3 273 215.9 7 368.3 1.6
8 200 550 127 305 219.1 318 269.9 7 438.2 1.6
10 250 675 165.1 375 273 419 323.8 7 539.8 1.6
12 300 760 184.2 441 323.8 464 381 7 619.1 1.6

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En 1092 Welding Neck Flange Tolerances


Dimension Flange Tolerance
A Outside Diameter
  • When Outside Diameter is 24" or less: ±1/16" (1.6 Millimeter)
  • When Outside Diameter is over 24": ±1/8" (3.2 Millimeter)
D Inside Diameter
  • 10" and smaller: ±1/32" (0.8 Millimeter)
  • 12" thru 18": +1/8" (3.2 Millimeter)
  • 20" and larger: -1/16" (1.6Millimeter)
B Diameter of contact face
  • 1/16" raised face: ±1/32" (0.8Millimeter)
  • 1/4" Raised Face, Tongue & Groove (male & female): ±1/64" (0.4 Millimeter)
J Diameter of hub at base
  • When hub base is 24" or smaller: ±1/16" (1.6 Millimeter)
  • When hub base is over 24": ±1/8" (3.2 Millimeter)
H Diameter of hub at point of welding
  • 5" and smaller: +3/32" (2.4 Millimeter), -1/32" (0.8 Millimeter)
  • 6" and larger: +5/32" (4.0 Millimeter), -1/32 (0.8 Millimeter)
P Drilling
  • Bolt circle: ±1/16" (1.6 Millimeter)
  • Bolt hole spacing: ±1/32" (0.8 Millimeter)
Eccentricity of bolt circle with respect to facing
  • 2 1/2" and smaller ±1/32" (0.8 Millimeter) max.
  • 3" and larger ±1/16" (1.6 Millimeter) max.
C Thickness
  • 18" and smaller: ±1/8" (3.2 Millimeter), -0"
  • 20" and larger: ±3/16" (4.8 Millimeter), -0"
K Length of hub
  • 10" and smaller: ±1/16" (1.6 Millimeter)
  • 12" and larger: ±1/8" (3.2 Millimeter)