Long Weld Neck Flange

Stainless Steel LWNRF Flange and Carbon Steel LWN Flanges manufacturer in India.

Stainless Steel Long Weld Neck Flanges

Stainless Steel Long Weld Neck Flanges

ASME B16.5 LWN Flange

ASME B16.5 LWN Flange

Heavy Barrel Long Weld Neck Flange

Heavy Barrel Long Weld Neck Flange


What Is A Long Weld Neck Flange?


Stainless Steel Long Weld Neck Flanges can come in various dimensions such as the B16.5 or B16.47. Their specific types such as rtj long weld neck flange are used for specific purposes. Also, there are specified pressure classes. ASME B16.5 long weld neck flange dimensions range from NPS 4 to NPS 24 specifications. The lwn flange standard includes pressure classes, DIN numbers BS numbers and the flange faces. long weld neck flange manufacturers produce flanges in various materials but the carbon steel long weld neck flange is the common product.

Carbon Steel Long Weld Neck Flange

Carbon Steel Long Weld Neck Flange

Long Weld Neck Standard Connection Flanges

Long Weld Neck Standard Connection Flanges

Raised Face Long Weld Neck Flange

Raised Face Long Weld Neck Flange


What Is Lwn Flange?


The Lwn flange 1500# has a higher pressure threshold than the lwnf flange 600#. ASME B16.5 lwn flange dimensions can be specified according to the nominal pipe size, outside diameter of the flange, thickness of the flange, diameter of the raised face, diameter of the hub at base and the welding neck if applicable. And the dimensions can vary according to the pressure class as well. For example, the lwnr flange dimensions will hold properties such as wall thickness to meet the pressure requirements of that particular class. A comprehensive long weld neck flange weight chart is available with Rajtilak Metal for easy information for clients.


What Are The Benefits Of Using Long Weld Neck Flanges?

ASME B16.5 long weld neck flange can be corrosion resistant and strong depending on the material make up. carbon steel long weld neck flange could be used in the heavy engineering types like in the railways. lwnrf flange is welded to a matching pipe at the tip of the neck with a weld prep. Different pressure classes can be specified with different dimensions as well. For example, 300# long weld neck flange dimensions can be specified according to the diameter of bolt circle, number of bolts, diameter of bolts, diameter of the holes, etc.



ASME B16.5 Long Weld Neck Flanges Dimensions

ASME B16.5 Long Weld Neck Flanges Dimensions

Class 150 Long Weld Neck Flange Dimensions

Normal Pipe Size LWN Bore & E Bore Of HB Outside Daimeter Thickness RF of Outside Daimeter Long Weld Neck HB E # of Holes Size Of Hole Circle Of Bolt Stop Daimeter Relief Daimeter Length If Relief NPS Size Length Of RF Length Of RTJ LWNR HB E Base
B T D D D C NS NR NL Base Per 1″ Base Per 1″ Base Per 1″
 1/2 0.5 0.55 3.5 0.44 1.38 1.25 1.5 3.5 4 0.62 2.38 1.5 1.25 0.75 1/2  2 1/4 2 3/4 3 0.3 5 0.4 21 2.7 9
 3/4 0.75 0.74 3.88 0.5 1.69 1.62 1.88 3.88 4 0.62 2.75 1.88 1.62 0.75 1/2  2 1/2 3 5 0.5 7 0.7 27 3.2 9
1 1 0.96 4.25 0.56 2 2 2.25 4.25 4 0.62 3.12 2.25 2 0.75 1/2  2 1/2 3 7 0.7 10 0.9 30 3.8 9
1 1/4 1.25 1.28 4.62 0.62 2.5 2.38 2.62 4.62 4 0.62 3.5 2.62 2.38 0.75 1/2  2 3/4 3 1/4 10 0.9 12 1.2 36 4.4 9
1 1/2 1.5 1.5 5 0.69 2.88 2.62 3 5 4 0.62 3.88 3 2.62 0.75 1/2  2 3/4 3 1/4 12 1 16 1.5 41 5.1 9
2 2 1.94 6 0.75 3.62 3.06 3.69 6 4 0.75 4.75 3.69 3.06 0.88 5/8  3 1/4 3 3/4 15 1.2 23 2.2 57 7.1 9
2 1/2 2.5 2.32 7 0.88 4.12 3.75 4.44 7 4 0.75 5.5 4.44 3.75 0.88 5/8  3 1/2 4 22 1.7 34 3.2 79 10 9
3 3 2.9 7.5 0.94 5 4.25 4.94 7.5 4 0.75 6 4.94 4.25 0.88 5/8  3 1/2 4 1/4 25 2 38 3.6 86 11 9
3 1/2 3.5 3.36 8.5 0.94 5.5 4.88 5.94 8.5 8 0.75 7 5.94 4.88 0.88 5/8  3 1/2 4 1/4 32 2.6 55 5.3 110 13 9
4 4 3.83 9 0.94 6.19 5.5 6.44 9 8 0.75 7.5 6.44 5.5 0.88 5/8  3 1/2 4 1/4 47 3.2 78 6 164 14 12
5 5 4.81 10 0.94 7.31 6.50 7.25 10 8 0.88 8.5 7.25 6.50 1 3/4  3 3/4 4 1/2 57 3.8 87 6.50 189 17 12
6 6 5.76 11 1 8.5 7.75 8.25 11 8 0.88 9.5 8.25 7.75 1 3/4  4 4 1/2 75 5.4 103 7.8 216 19 12
8 8 7.62 13.5 1.12 10.62 9.75 10.5 13.5 8 0.88 11.75 10.5 9.75 1 3/4  4 1/4 4 3/4 102 6.9 157 11 292 26 12
10 10 9.56 16 1.19 12.75 12 12.81 16 12 1 14.25 12.81 12 1.12 7/8  4 3/4 5 1/4 143 9.8 214 16 382 35 12
12 12 11.38 19 1.25 15 14.38 15.56 19 12 1 17 15.56 14.38 1.12 7/8  4 3/4 5 1/2 205 14 329 25 535 48 12
14 14 14 21 1.38 16.25 16 17.12 21 12 1.12 18.75 17.12 16 1.25 1 5 1/4 6 211 13 296 22 585 55 12
16 16 16 23.5 1.44 18.5 18 19.62 23.5 16 1.12 21.25 19.62 18 1.25 1 5 1/2 6 246 15 388 29 714 66 12
18 18 18 25 1.56 21 20 20.94 25 16 1.25 22.75 20.94 20 1.38 1 1/8 6 6 1/2 270 17 362 25 711 67 12
20 20 20 27.5 1.69 23 22 23.19 27.5 20 1.25 25 23.19 22 1.38 1 1/8 6 1/4 7 311 19 434 31 840 79 12
24 24 24 32 1.88 27.25 26.25 27.5 32 20 1.38 29.5 27.5 26.25 1.5 1 1/4 7 7 3/4 423 25 574 40 1046 100 12

Class 300 Long Weld Neck Flange Dimensions

NPS Dimensions Of Flange Barrel Outside Daimeter Bolting Nut Stud Bolt Weights Length
Normal LWN Bore & E Bore Of HB Outside Daimeter Thickness RF of Outside Daimeter LWN HB E # of Holes Size Of Hole Circle Of Bolt Stop Daimeter Relief Daimeter Relief Length NPS Size Length Of RF Length Of RTJ LWN HB E Base
B T D D D C NS NR NL Base Per 1″ Base Per 1″ Base Per 1″
 1/2 0.5 0.55 3.75 0.56 1.38 1.5 1.75 3.75 4 0.62 2.62 1.75 1.5 0.75 1/2  2 1/2 3 5 0.4 7 0.6 24 3.1 9
 3/4 0.75 0.74 4.62 0.62 1.69 1.88 2.19 4.62 4 0.75 3.25 2.19 1.88 0.88 5/8  3 3 1/2 9 0.7 11 0.9 37 4.6 9
1 1 0.96 4.88 0.69 2 2.12 2.44 4.88 4 0.75 3.5 2.44 2.12 0.88 5/8  3 1/4 3 1/2 9 0.8 12 1.1 40 5.1 9
1 1/4 1.25 1.28 5.25 0.75 2.5 2.5 2.81 5.25 4 0.75 3.88 2.81 2.5 0.88 5/8  3 1/4 3 3/4 13 1 15 1.4 45 5.8 9
1 1/2 1.5 1.5 6.12 0.81 2.88 2.75 3.25 6.12 4 0.88 4.5 3.25 2.75 1 3/4  3 1/2 4 15 1.2 21 1.9 61 7.8 9
2 2 1.94 6.5 0.88 3.62 3.31 3.94 6.5 8 0.75 5 3.94 3.31 0.88 5/8  3 1/2 4 1/4 20 1.5 28 2.6 68 8.5 9
2 1/2 2.5 2.32 7.5 1 4.12 3.94 4.62 7.5 8 0.88 5.88 4.62 3.94 1 3/4  4 4 1/2 25 2.1 38 3.6 89 11 9
3 3 2.9 8.25 1.12 5 4.62 5.38 8.25 8 0.88 6.62 5.38 4.62 1 3/4  4 1/4 5 35 2.7 49 4.6 106 13 9
3 1/2 3.5 3.36 9 1.19 5.5 5.25 6 9 8 0.88 7.25 6 5.25 1 3/4  4 1/4 5 42 3.4 59 5.5 122 15 9
4 4 3.83 10 1.25 6.19 5.75 6.62 10 8 0.88 7.88 6.62 5.75 1 3/4  4 1/2 5 1/4 62 3.8 91 6.5 207 19 12
5 5 4.81 11 1.38 7.31 7 8 11 8 0.88 9.25 8 7 1 3/4  4 3/4 5 1/4 84 5.3 124 9.1 241 21 12
6 6 5.76 12.5 1.44 8.5 8.12 9.38 12.5 12 0.88 10.62 9.38 8.12 1 3/4  4 3/4 5 3/4 105 6.7 165 12 303 27 12
8 8 7.62 15 1.62 10.62 10.25 11.56 15 12 1 13 11.56 10.25 1.12 7/8  5 1/2 6 1/4 148 9.1 228 17 405 36 12
10 10 9.56 17.5 1.88 12.75 12.62 13.62 17.5 16 1.12 15.25 13.62 12.62 1.25 1 6 1/4 7 1/4 210 13 291 21 499 46 12
12 12 11.38 20.5 2 15 14.75 15.94  20.5 16 1.25 17.75 15.94 14.75 1.38 1 1/8  6 3/4 7 1/2 275 16 392 28 651 61 12
14 14 14 23 2.12 16.25 16.75 18.44 23 20 1.25 20.25 18.44 16.75 1.38 1 1/8  7 7 3/4 324 19 456 32 785 74 12
16 16 16 25.5 2.25 18.5 19 20.5 25.5 20 1.38 22.5 20.5 19 1.5 1 1/4  7 1/2 8 1/2 404 23 529 37 914 88 12
18 18 18 28 2.38 21 21 22.75 28 24 1.38 24.75 22.75 21 1.5 1 1/4  7 3/4 8 1/4 465 26 630 43 1066 102 12
20 20 20 30.5 2.5 23 23.12 25 30.5 24 1.38 27 25 23.12 1.5 1 1/4  8 1/4 9 1/4 549 30 741 50 1228 118 12
24 24 24 36 2.75 27.25 27.62 29.62 36 24 1.62 32 29.62 27.62 1.75 1 1/2  9 1/4 10 1/4 778 42 1016 67 1627 160 12

Class 400 Long Weld Neck Flange Dimensions

NPS Size Dimensions Of Flange Barrel Outside Daimeter Bolting Nut Stud Bolt Weights Length
Normal LWN Bore & E Bore HB Outside Daimeter Thk. RF of Outside Daimeter LWN HB E # of Holes Size Of Hole Circle Of Bolt Stop Diameter Relief Diameter Relief Length NPS Size Length Of RF Length Of RTJ LWN HB E Base
B T D D D C NS NR NL Base Per 1″ Base Per 1″ Base Per 1″
 1/2 0.5 0.55 3.75 0.56 1.38 1.5 1.75 3.75 4 0.62 2.62 1.75 1.5 0.75  1/2 3 3 5 0.4 7 0.6 24 3.1 9
 3/4 0.75 0.74 4.62 0.62 1.69 1.88 2.19 4.62 4 0.75 3.25 2.19 1.88 0.88  5/8 3 1/2 3 1/2 8 0.7 11 0.9 37 4.6 9
1 1 0.96 4.88 0.69 2 2.12 2.44 4.88 4 0.75 3.5 2.44 2.12 0.88  5/8 3 1/2 3 1/2 9 0.8 12 1.1 40 5.1 9
1 1/4 1.25 1.28 5.25 0.81 2.5 2.5 2.81 5.25 4 0.75 3.88 2.81 2.5 0.88  5/8 3 3/4 3 3/4 13 1 15 1.4 45 5.8 9
1 1/2 1.5 1.5 6.12 0.88 2.88 2.75 3.25 6.12 4 0.88 4.5 3.25 2.75 1  3/4 4 1/4 4 1/4 16 1.2 21 1.9 61 7.8 9
2 2 1.94 6.5 1 3.62 3.31 3.94 6.5 8 0.75 5 3.94 3.31 0.88  5/8 4 1/4 4 1/4 20 1.5 29 2.6 68 8.5 9
2 1/2 2.5 2.32 7.5 1.12 4.12 3.94 4.63 7.5 8 0.88 5.88 4.63 3.94 1  3/4 4 3/4 4 3/4 27 2.1 39 3.6 88 11 9
3 3 2.9 8.25 1.25 5 4.62 5.38 8.25 8 0.88 6.62 5.38 4.62 1  3/4 5 5 36 2.7 50 4.6 104 13 9
3 1/2 3.5 3.36 9 1.38 5.5 5.25 5.81 9 8 1 7.25 5.81 5.25 1.12  7/8 5 1/2 5 1/2 45 3.4 61 5.5 116 15 9
4 4 3.83 10 1.38 6.19 5.75 6.44 10 8 1 7.88 6.44 5.75 1.12  7/8 5 1/2 5 1/2 65 3.8 93 6.5 197 19 12
5 5 4.81 11 1.5 7.31 7 7.81 11 8 1 9.25 7.81 7 1.12  7/8 5 3/4 5 3/4 88 5.3 127 9.1 229 22 12
6 6 5.76 12.5 1.62 8.5 8.12 9.19 12.5 12 1 10.62 9.19 8.12 1.12  7/8 6 6 110 6.7 169 12 286 27 12
8 8 7.62 15 1.88 10.62 10.25 11.38 15 12 1.12 13 11.38 10.25 1.25 1 6 3/4 6 3/4 154 9.1 233 17 379 36 12
10 10 9.56 17.5 2.12 12.75 12.62 13.44 17.5 16 1.25 15.25 13.44 12.62 1.38 1 1/8 7 1/2 7 1/2 218 13 298 21 475 46 12
12 12 11.38 20.5 2.25 15 14.75 15.75 20.5 16 1.38 17.75 15.75 14.75 1.5 1 1/4 8 8 285 16 401 28 627 62 12
14 14 14 23 2.38 16.25 16.75 18.25 23 20 1.38 20.25 18.25 16.75 1.5 1 1/4 8 1/4 8 1/4 336 19 467 32 758 74 12
16 16 16 25.5 2.5 18.5 19 20.31 25.5 20 1.5 22.5 20.31 19 1.62 1 3/8 8 3/4 8 3/4 418 23 542 37 884 88 12
18 18 18 28 2.62 21 21 22.56 28 24 1.5 24.75 22.56 21 1.62 1 3/8  9 9 482 26 645 43 1033 102 12
20 20 20 30.5 2.75 23 23.12 24.63 30.5 24 1.62 27 24.63 23.12 1.75 1 1/2  9 1/2 9 3/4 568 30 759 50 1165 118 12
24 24 24 36 3 27.62 27.62 29.25 36 24 1.88 32 29.25 27.62 2 1 3/4 10 1/2 11 804 42 1040 67 1540 160 12

Class 600 Long Weld Neck Flange Dimensions

NPS Size Dimensions Of Flange Barrel Outside Daimeter Bolting Nut Stud Bolt Weights Length
Normal LWN Bore & E Bore HB Outside Daimeter Thickness RF of Outside Daimeter LWN HB E # of Holes Size Of Hole Circle Of Bolt Stop Diameter Relief Diameter Relief Length NPS Size Length Of RF Length Of RTJ LWN HB E Base
B T D D D C NS NR NL Base Per 1″ Base Per 1″ Base Per 1″
 1/2 0.5 0.55 3.75 0.56 1.38 1.5 1.75 3.75 4 0.62 2.62 1.75 1.5 0.75 1/2 3 3 5 0.4 7 0.6 24 3.1 9
 3/4 0.75 0.74 4.62 0.62 1.69 1.88 2.19 4.62 4 0.75 3.25 2.19 1.88 0.88 5/8 3 1/2 3 1/2 8 0.7 11 0.9 36 4.6 9
1 1 0.96 4.88 0.69 2 2.12 2.44 4.88 4 0.75 3.5 2.44 2.12 0.88 5/8 3 1/2 3 1/2 9 0.8 12 1.1 39 5.1 9
1 1/4 1.25 1.28 5.25 0.81 2.5 2.5 2.81 5.25 4 0.75 3.88 2.81 2.5 0.88 5/8 3 3/4 3 3/4 13 1 15 1.4 44 5.8 9
1 1/2 1.5 1.5 6.12 0.88 2.88 2.75 3.25 6.12 4 0.88 4.5 3.25 2.75 1 3/4 4 1/4 4 1/4 16 1.2 21 1.9 59 7.8 9
2 2 1.94 6.5 1 3.62 3.31 3.94 6.5 8 0.75 5 3.94 3.31 0.88 5/8 4 1/4 4 1/4 20 1.5 29 2.6 67 8.5 9
2 1/2 2.5 2.32 7.5 1.12 4.12 3.94 4.62 7.5 8 0.88 5.88 4.62 3.94 1 3/4 5 4 3/4 27 2.1 39 3.6 85 11 9
3 3 2.9 8.25 1.25 5 4.62 5.38 8.25 8 0.88 6.62 5.38 4.62 1 3/4 5 5 1/4 36 2.7 50 4.6 104 13 9
3 1/2 3.5 3.36 9 1.38 5.5 5.25 5.81 9 8 1 7.25 5.81 5.25 1.12 7/8 5 1/2 5 1/2 45 3.4 57 5 116 15 9
4 4 3.83 10.75 1.5 6.19 6 7.06 10.75 8 1 8.5 7.06 6 1.12 7/8 5 3/4 6 77 4.5 113 7.8 238 22 12
5 5 4.81 13 1.75 7.31 7.5 8.88 13 8 1.12 10.5 8.88 7.5 1.25 1 6 1/2 6 1/2 123 7 180 12 336 32 12
6 6 5.76 14 1.88 8.5 8.75 9.88 14 12 1.12 11.5 9.88 8.75 1.25 1 6 3/4 7 152 9 207 14 373 36 12
8 8 7.62 16.5 2.19 10.62 10.75 11.94 16.5 12 1.25 13.75 11.94 10.75 1.38 1 1/8 7 3/4 8 207 11 277 19 478 46 12
10 10 9.56 20 2.5 12.75 13.5 15 20 16 1.38 17 15 13.5 1.5 1 1/4 8 1/2 8 3/4 324 18 433 30 683 67 12
12 12 11.38 22 2.62 15 15.75 17.25 22 20 1.38 19.25 17.25 15.75 1.5 1 1/4 8 3/4 9 393 23 533 37 779 76 12
14 14 14 23.75 2.75 16.25 17 18.56 23.75 20 1.5 20.75 18.56 17 1.62 1 3/8 9 1/4 9 1/2 471 21 631 33 1149 82 16
16 16 16 27 3 18.5 19.5 21.38 27 20 1.62 23.75 21.38 19.5 1.75 1 1/2 10 10 1/4 638 28 856 45 1471 105 16
18 18 18 29.25 3.25 21 21.5 23.19 29.25 20 1.75 25.75 23.19 21.5 1.88 1 5/8 10 3/4 11 731 31 941 48 1628 118 16
20 20 20 32 3.5 23 24 25.94 32 24 1.75 28.5 25.94 24 1.88 1 5/8 11 1/2 11 3/4 916 39 1180 61 1920 139 16
24 24 24 37 4 27.25 28.25 30.06 37 24 2 33 30.06 28.25 2.12 1 7/8 13 13 1/2 1210 49 1486 73 2376 176 16

Class 900 Long Weld Neck Flange Dimensions

NPS Size Dimensions Of Flange Barrel Outside Daimeter Bolting Nut Stud Bolt Weights Length
Normal LWN Bore & E Bore HB Outside Daimeter Thickness RF of Outside Daimeter LWN HB E # of Holes Size Of Hole Circle Of Bolt Stop Diameter Relief Diameter Relief Length NPS Size Length Of RF Length Of RTJ LWN HB E Base
B T D D D C NS NR NL Base Per 1″ Base Per 1″ Base Per 1″ L
 1/2 0.5 0.55 4.75 0.88 1.38 1.56 2 4.75 4 0.88 3.25 2 1.56 1 3/4  4 1/4 4 1/4 8 0.5 10 0.8 37 5 9
 3/4 0.75 0.74 5.12 1 1.69 1.81 2.25 5.12 4 0.88 3.5 2.25 1.81 1 3/4  4 1/2 4 1/2 10 0.6 13 1 42 5.7 9
1 1 0.96 5.88 1.12 2 2.12 2.56 5.88 4 1 4 2.56 2.12 1.12 7/8  5 5 13 0.8 17 1.3 54 7.5 9
1 1/4 1.25 1.28 6.25 1.12 2.5 2.5 2.94 6.25 4 1 4.38 2.94 2.5 1.12 7/8  5 5 17 1 20 1.6 61 8.3 9
1 1/2 1.5 1.5 7 1.25 2.88 2.75 3.25 7 4 1.12 4.88 3.25 2.75 1.25 1 5 1/2 5 1/2 21 1.2 26 1.9 77 10 9
2 2 1.94 8.5 1.5 3.62 4.12 5.06 8.5 8 1 6.5 5.06 4.12 1.12 7/8  5 3/4 5 3/4 42 2.9 56 4.9 115 15 9
2 1/2 2.5 2.32 9.62 1.62 4.12 4.88 5.88 9.62 8 1.12 7.5 5.88 4.88 1.25 1 6 1/4 6 1/4 56 3.9 75 6.5 144 19 9
3 3 2.9 9.5 1.5 5 5 6.06 9.5 8 1 7.5 6.06 5 1.12 7/8  5 3/4 5 3/4 51 3.6 71 6.3 139 18 9
4 4 3.83 11.5 1.75 6.19 6.25 7.44 11.5 8 1.25 9.25 7.44 6.25 1.38 1 1/8  6 3/4 6 3/4 93 5.1 133 9.1 270 26 12
5 5 4.81 13.75 2 7.31 7.5 9 13.75 8 1.38 11 9 7.5 1.5 1 1/4 7 1/2 7 1/2 135 7 194 13 376 37 12
6 6 5.76 15 2.19 8.5 9.25 10.69 15 12 1.25 12.5 10.69 9.25 1.38 1 1/8 7 1/2 7 3/4 191 11 259 18 436 42 12
8 8 7.62 18.5 2.5 10.62 11.75 13.31 18.5 12 1.5 15.5 13.31 11.75 1.62 1 3/8 8 3/4 8 3/4 297 16 389 27 626 62 12
10 10 9.56 21.5 2.75 12.75 14.5 16.31 21.5 16 1.5 18.5 16.31 14.5 1.62 1 3/8 9 1/4 9 1/4 422 25 558 39 824 81 12
12 12 11.38 24 3.12 15 16.5 18.81 24 20 1.5 21 18.81 16.5 1.62 1 3/8 10 10 518 29 715 50 984 96 12
14 14 14 25.25 3.38 16.25 17.75 19.62 25.25 20 1.62 22 19.62 17.75 1.75 1 1/2 10 3/4 11 624 26 817 42 1368 98 16
16 16 16 27.75 3.5 18.5 20 21.69 27.75 20 1.75 24.25 21.69 20 1.88 1 5/8 11 1/4 11 1/2 750 32 942 48 1573 114 16
18 18 18 31 4 21 22.25 24.06 31 20 2 27 24.06 22.25 2.12 1 7/8 12 3/4 13 1/4 950 38 1169 57 1898 142 16
20 20 20 33.75 4.25 23 24.5 26.38 33.75 20 2.12 29.5 26.38 24.5 2.25 2 13 3/4 14 1/4 1121 43 1378 66 2182 164 16
24 24 24 41 5.5 27.25 29.5 31.62 41 20 2.62 35.5 31.62 29.5 2.75 2 1/2 17 1/4 18 1865 65 2160 94 3084 246 16

Class 1500 Long Weld Neck Flange Dimensions

NPS Size Dimensions Of Flange Barrel Outside Daimeter Bolting Nut Stud Bolt Weights Length
Normal LWN Bore & E Bore HB Outside Daimeter Thickness RF of Outside Daimeter LWN HB E # of Holes Size Of Hole Circle Of Bolt Stop Diameter Relief Diameter Relief Length NPS Size Length Of RF Length Of RTJ LWN HB E Base
B T D D D C NS NR NL Base Per 1″ Base Per 1″ Base Per 1″
 1/2 0.5 0.55 4.75 0.88 1.38 1.56 2 4.75 4 0.88 3.25 2 1.56 1 3/4  4 1/4 4 1/4 8 0.5 10 0.8 37 5 9
 3/4 0.75 0.74 5.12 1 1.69 1.81 2.25 5.12 4 0.88 3.5 2.25 1.81 1 3/4  4 1/2 4 1/2 10 0.6 13 1 42 5.7 9
1 1 0.96 5.88 1.12 2 2.12 2.56 5.88 4 1 4 2.56 2.12 1.12 7/8  5 5 13 0.8 17 1.3 54 7.5 9
1 1/4 1.25 1.28 6.25 1.12 2.5 2.5 2.94 6.25 4 1 4.38 2.94 2.5 1.12 7/8  5 5 17 1 20 1.6 61 8.3 9
1 1/2 1.5 1.5 7 1.25 2.88 2.75 3.25 7 4 1.12 4.88 3.25 2.75 1.25 1 5 1/2 5 1/2 21 1.2 26 1.9 77 10 9
2 2 1.94 8.5 1.5 3.62 4.12 5.06 8.5 8 1 6.5 5.06 4.12 1.12 7/8  5 3/4 5 3/4 42 2.9 56 4.9 115 15 9
2 1/2 2.5 2.32 9.62 1.62 4.12 4.88 5.88 9.62 8 1.12 7.5 5.88 4.88 1.25 1 6 1/4 6 1/4 56 3.9 75 6.5 144 19 9
3 3 2.9 10.5 1.88 5 5.25 6.19 10.5 8 1.25 8 6.19 5.25 1.38 1 1/8  7 7 67 4.1 84 6.7 161 23 9
4 4 3.83 12.25 2.12 6.19 6.38 7.5 12.25 8 1.38 9.5 7.5 6.38 1.5 1 1/4  7 3/4 7 3/4 110 5.5 147 9.3 302 30 12
5 5 4.81 14.75 2.88 7.31 7.75 9.12 14.75 8 1.62 11.5 9.12 7.75 1.75 1 1/2  9 3/4 9 3/4 181 7.8 233 13 414 43 12
6 6 5.76 15.5 3.25 8.5 9 10.31 15.5 12 1.5 12.5 10.31 9 1.62 1 3/8  10 1/4 10 1/2 215 10 272 16 445 46 12
8 8 7.62 19 3.62 10.62 11.5 12.94 19 12 1.75 15.5 12.94 11.5 1.88 1 5/8  11 1/2 12 3/4 337 15 417 24 629 67 12
10 10 9.56 23 4.25 12.75 14.5 16.06 23 12 2 19 16.06 14.5 2.12 1 7/8  13 1/4 13 1/2 546 25 651 37 888 97 12
12 12 11.38 26.5 4.88 15 17.75 19.38 26.5 16 2.12 22.5 19.38 17.75 2.25 2 14 3/4 15 1/4 946 38 1148 55 1683 127 16
14 14 14 29.5 5.25 16.25 19.5 21.5 29.5 16 2.38 25 21.5 19.5 2.5 2 1/4  16 16 3/4 1116 41 1308 59 1929 150 16
16 16 16 32.5 5.75 18.5 21.75 23.88 32.5 16 2.62 27.75 23.88 21.75 2.75 2 1/2  17 1/2 18 1/2 1371 48 1588 70 2238 178 16
18 18 18 36 6.38 21 23.5 26.25 36 16 2.88 30.5 26.25 23.5 3 2 3/4  19 1/2 20 3/4 1674 51 1959 81 2629 216 16
20 20 20 38.75 7 23 25.25 28.12 38.75 16 3.12 32.75 28.12 25.25 3.25 3 21 1/4 22 1/4 1943 53 2241 87 2868 245 16
24 24 24 46 8 27.25 30 33.62 46 16 3.62 39 33.62 30 3.75 3 1/2  24 1/4 25 1/2 2936 72 3334 123 3819 343 16

Class 2500 Long Weld Neck Flange Dimensions

NPS Size Dimensions Of Flange Barrel Outside Daimeter Bolting Nut Stud Bolt Weights Length
Normal LWN Bore & E Bore HB Outside Daimeter Thickness RF of Outside Daimeter LWN HB E # of Holes Size Of Hole Circle Of Bolt Stop Diameter Relief Diameter Relief Length NPS Size Length Of RF Length Of RTJ LWN HB E Base
B T D D D C NS NR NL Base Per 1″ Base Per 1″ Base Per 1″
 1/2 0.5 0.55 5.25 1.19 1.38 1.81 2.25 5.25 4 0.88 3.5 2.25 1.81 1 3/4  4 3/4 4 3/4 11 0.7 14 1.1 45 6.1 9
 3/4 0.75 0.74 5.5 1.25 1.69 2.06 2.5 5.5 4 0.88 3.75 2.5 2.06 1 3/4  5 5 13 0.8 17 1.3 49 6.6 9
1 1 0.96 6.25 1.38 2 2.25 2.81 6.25 4 1 4.25 2.81 2.25 1.12 7/8  5 1/2 5 1/2 18 0.9 22 1.6 62 8.5 9
1 1/4 1.25 1.28 7.25 1.5 2.5 2.88 3.5 7.25 4 1.12 5.12 3.5 2.88 1.25 1 6 6 27 1.5 32 2.4 84 11 9
1 1/2 1.5 1.5 8 1.75 2.88 3.12 3.94 8 4 1.25 5.75 3.94 3.12 1.38 1 1/8  6 3/4 6 3/4 33 1.7 42 3 94 14 9
2 2 1.94 9.25 2 3.62 3.75 5.12 9.25 8 1.12 6.75 5.12 3.75 1.25 1 7 7 48 2.2 66 5 131 18 9
2 1/2 2.5 2.32 10.5 2.25 4.12 4.5 5.94 10.5 8 1.25 7.75 5.94 4.5 1.38 1 1/8  7 3/4 8 66 3.1 90 6.7 165 23 9
3 3 2.9 12 2.62 5 5.25 7 12 8 1.38 9 7 5.25 1.5 1 1/4  8 3/4 9 97 4.1 127 9 210 30 9
4 4 3.83 14 3 6.19 6.5 8.38 14 8 1.62 10.75 8.38 6.5 1.75 1 1/2  10 10 1/4 159 5.8 218 12 391 40 12
5 5 4.81 16.5 3.62 7.31 8 10 16.5 8 1.88 12.75 10 8 2 1 3/4  11 3/4 12 1/4 248 8.7 319 17 518 55 12
6 6 5.76 19 4.25 8.5 9.25 11.38 19 8 2.12 14.5 11.38 9.25 2.25 2 13 1/2 14 358 11 441 21 641 73 12
8 8 7.62 21.75 5 10.62 12 14.12 21.75 12 2.12 17.25 14.12 12 2.25 2 15 15 1/2 589 18 743 31 1167 92 16
10 10 9.56 26.5 6.5 12.75 14.75 17.38 26.50 12 2.62 21.25 17.38 14.75 2.75 2 1/2  19 1/4 20 997 26 1202 47 1625 134 16
12 12 11.38 30 7.25 15 17.38 20.12 30 12 2.88 24.38 20.12 17.38 3 2 3/4  21 1/4 22 1363 35 1609 61 1995 168 16

Biggest Long Weld Neck Standard Connection Flanges Manufacturer In India, View Nozzle Flanges Pressure Rating Class..


Standard Specification Of LWN Flange

Material Specification Of : ASME B16.5 Long Weld Neck Flange
Low Temperature Above -29 Degree C (−20°F)
Common Types Of Flanges: Slip On (SORF), Weld Neck (WNRF), Blind (BLRF), Lap Joint (Loose), Threaded (NPT), Socket-Weld (SWRF)
Special Types Of Flanges : Nipoflange, Elboflange, Latroflange, Swivel Flange, Expanding Flange, Reducing Flange, Weldoflange
Marking Standard Name of Manufacturer
Schedule
Type of Flange Facing
Nominal Pipe Size
Pressure Class
ASME B16 Designation
Bolt Type high strength bolts
medium strength bolts
low strength bolts
European Standard Flanges JIS B2220 Flanges (5k to 30k) and KS1503 flanges
Standard Cover : pressure ratings & temperature ratings, materials, marking, dimensions, weight, tolerances, testing
Contact Faces RTJ (Ring Type Joint), FF (Flat Face), RF (Raised Face), T/G (Tongue And Groove ), M/F (Male And Female)
Size Chart Normal Pipe Size 1/2 to NPS 24"
Materials Stainless Steel (Grade 304/L, 316/L), Carbon Steel (ASTM A105 And ASTM A350), Alloy Steel (ASTM A182), Mild Steel, Duplex Steel, Pressure Vessel Steel, Titanium, Super Duplex Steel, Nickel Alloy, Monel, Inconel, Hastelloy, Copper Nickel, Cast Iron, Wrought Iron.
Thickness Normal Pipe Size ≤ 18
Bore Diameter Normal Pipe ≤ 10
Flanges Standards EN 1092-1, JIS, ASME B16.5, ASME B16.47 type A, UNI, DIN
Pressure Rating Class 150 To Class 2500
High Temperature Above 200°C (400°F) For Class 150 Or Above 400°C (750°F)
Russian-Standard Flanges GOST 12820 / 12821-80, DIN, UNI, EN 1092-1
South African Standard Flanges SANSflanges And SABS flanges
Surface Finish smooth, concentric serrated, stock
Gaskets Types Full Face Gasket
Flat Ring Gasket
Metallic Ring Gakset
Advantages Of Pipe Flange Used to Connect Pipe System
Easy Repair Pipe System
Assembled Without Welding

Check ANSI B16.5 Long Weld Neck Flange Weight Calculator And Class 300 And 600 Long Welding Neck Wall Thickness Tolerance.


Long Weld Neck Flange Pressure Ratings

ASME B16.5 Long Weld Neck Flange Pressure Pressure
Temperature (°C)
Class
Class 150Class 300Class 400Class 600Class 900Class 1500Class 2500
-29 - 38 19.8 51.7 68.9 103.4 155 259 431
50 19.5 51.7 68.9 103.4 155 259 431
100 17.7 51.5 68.7 103.0 155 258 429
150 15.8 50.2 66.8 100.3 151 251 418
200 13.8 48.6 64.8 97.2 146 243 405
250 12.1 46.3 61.7 92.7 139 232 386
300 10.2 42.9 57.0 85.7 129 214 357
325 9.3 41.4 55.0 82.6 124 207 344
350 8.4 40.0 53.4 80.0 120 200 334
375 7.4 37.8 50.4 75.7 114 189 315
400 6.5 34.7 46.3 69.4 104 174 290
425 5.5 28.8 38.4 57.5 86.3 144 240
450 4.6 23.0 30.7 46.0 69.0 115 192
475 3.7 17.1 22.8 34.2 51.3 85.4 142
500 2.8 11.6 15.4 23.2 34.7 57.9 96.5
538 1.4 5.9 7.9 11.8 17.7 29.5 49.2

Stainless Steel Long Weld Neck Flange Weight Chart According to ASME B16.5

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
3 3 3 3 3 3
3 3 3 3 4 4
2 5 5 5 5 5 6
8 8 8 8 7 10
3 9 9 9 9 9 11.5
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

Also View Difference Between Long Weld Neck Flange Vs Weld Neck Flange, Get LWNRF Flanges With Best Price And Fast Delivery.

Long Weld Neck Flange Wall Thickness

ANSI B16.5 Flanges Wall Thickness
NPS (Normal Pipe Sizes) Outside Daimeter (O.D.) Schedule 10 Schedule 20 Schedule 30 STD Wall Schedule 40 Schedule 60 EXT Hvy Schedule 80 Schedule 100 Schedule 120 Schedule 140 Schedule 160 XX Hvy
½ 0.84 0.083 ... ... 0.109 0.109 ... 0.147 0.147 ... ... ... 0.188 0.294
¾ 1.05 0.083 ... ... 0.113 0.113 ... 0.154 0.154 ... ... ... 0.219 0.308
1 1.315 0.109 ... ... 0.133 0.133 ... 0.179 0.179 ... ... ... 0.25 0.358
1 ¼ 1.66 0.109 ... ... 0.14 0.14 ... 0.191 0.191 ... ... ... 0.25 0.382
1 ½ 1.9 0.109 ... ... 0.145 0.145 ... 0.2 0.2 ... ... ... 0.281 0.4
2 2.375 0.109 ... ... 0.154 0.154 ... 0.218 0.218 ... ... ... 0.344 0.436
2 ½ 2.875 0.12 ... ... 0.203 0.203 ... 0.276 0.276 ... ... ... 0.375 0.552
3 3.5 0.12 ... ... 0.216 0.216 ... 0.3 0.3 ... ... ... 0.438 0.6
3 ½ 4 0.12 ... ... 0.226 0.226 ... 0.318 0.318 ... ... ... ... 0.636
4 4.5 0.12 ... ... 0.237 0.237 ... 0.337 0.337 ... 0.438 ... 0.531 0.674
5 5.563 0.134 ... ... 0.258 0.258 ... 0.375 0.375 ... 0.5 ... 0.625 0.75
6 6.625 0.134 ... ... 0.28 0.28 ... 0.432 0.432 ... 0.562 ... 0.719 0.864
8 8.625 0.148 0.25 0.277 0.322 0.322 0.406 0.5 0.5 0.594 0.719 0.812 0.906 0.875
10 10.75 0.165 0.25 0.307 0.365 0.365 0.5 0.5 0.594 0.719 0.844 1 1.125 1
12 12.75 0.18 0.25 0.33 0.375 0.406 0.562 0.5 0.688 0.844 1 1.125 1.312 1
14 14 0.25 0.312 0.375 0.375 0.438 0.594 0.5 0.75 0.938 1.094 1.25 1.406 ...
16 16 0.25 0.312 0.375 0.375 0.5 0.656 0.5 0.844 1.031 1.219 1.438 1.594 ...
18 18 0.25 0.312 0.438 0.375 0.562 0.75 0.5 0.938 1.156 1.375 1.562 1.781 ...
20 20 0.25 0.375 0.5 0.375 0.594 0.812 0.5 1.031 1.281 1.5 1.75 1.969 ...
22 22 0.25 ... ... 0.375 ... ... 0.5 ... ... .... .... .... ....
24 24 0.25 0.375 0.562 0.375 0.688 0.969 0.5 1.219 1.531 1.812 2.062 2.344 ....
26 26 .... .... .... 0.375 .... .... 0.5 .... .... .... .... .... ....
30 30 0.312 0.5 0.625 0.375 .... .... 0.5 .... .... .... .... .... ....
36 36 0.312 0.5 0.625 0.375 0.75 .... 0.5 .... .... .... .... .... ....
40 40 .... .... .... 0.375 .... .... 0.5 .... .... .... .... .... ....
42 42 …….. …….. …….. 0.375 …….. …….. 0.5 …….. …….. …….. …….. …….. ……..
48 48 …….. …….. …….. 0.375 …….. …….. 0.5 …….. …….. …….. …….. …….. ……..

ANSI B16.5 LWNRF Flanges Price List
Type Of Flanges Size (Inches) Material Class Price In India (INR)
Long Weld Neck Flanges 2" X SCH STD ASTM A105 Class 150 490.45
LWN 3" X SCH STD ASTM A105 Class 150 833.5
LWN 4" X SCH STD ASTM A105 Class 150 1040.00
LWN 6" X SCH STD ASTM A105 Class 150 1727.95
LWN 8" X SCH STD ASTM A105 Class 150 2148.3
LWN 10" X SCH STD ASTM A105 Class 150 2500.00
LWN 12" X SCH STD ASTM A105 Class 150 2980.00

Please note this is an approx Price of Stainless Steel Long Weld Neck Flanges in Mumbai, India. For final Carbon Steel Long Weld Neck Flange Price List Please Call on 91 - 22 - 67437342 or drop an Email to info@rajtilakmetal.com


ASME B16.5 Stainless Steel Long Weld Neck Flange Manufacturer in India

Carbon Steel Long Weld Neck Flange Bolt Dimensions

Class 150 Flanges Class 300 Flanges Class 600 Flanges
NPS # Bolts And Studs Diameter of Bolts And Studs Stud Length # Bolts And Studs Diameter of Bolts And Studs Stud Length # Bolts And Studs Diameter of Bolts And Studs Stud Length
1/16 RF RTJ 1/16 RF RTJ 1/4 RF RTJ
1/2 4 0.50 2-1/4 4 0.50 2-1/2 3 4 0.50 3 3
3/4 4 0.50 2-1/2 4 0.63 3 3-1/2 4 0.63 3-1/2 3-1/2
1 4 0.50 2-1/2 3 4 0.63 3 3-1/2 4 0.63 3-1/2 3-1/2
1-1/4 4 0.50 2-3/4 3-1/4 4 0.63 3-1/4 3-3/4 4 0.63 3-3/4 3-3/4
1-1/2 4 0.50 2-3/4 3-1/4 4 0.75 3-1/2 4 4 0.75 4-1/4 4-1/4
2 4 0.63 3-1/4 3-3/4 8 0.63 3-1/2 4 8 0.63 4-1/4 4-1/4
2-1/2 4 0.63 3-1/2 4 8 0.75 4 4-1/2 8 0.75 4-3/4 4-3/4
3 4 0.63 3-1/2 4 8 0.75 4-1/4 4-3/4 8 0.75 5 5
3-1/2 8 0.63 3-1/2 4 8 0.75 4-1/4 5 8 0.88 5-1/2 5-1/2
4 8 0.63 3-1/2 4 8 0.75 4-1/2 5 8 0.88 5-3/4 5-3/4
5 8 0.75 3-3/4 4-1/4 8 0.75 4-3/4 5-1/4 8 1.00 6-1/2 6-1/2
6 8 0.75 4 4-1/2 12 0.75 4-3/4 5-1/2 12 1.00 6-3/4 6-3/4
8 8 0.75 4-1/4 4-3/4 12 0.88 5-1/2 6 12 1.13 7-1/2 7-3/4
10 12 0.88 4-1/2 5 16 1.00 6-1/4 6-3/4 16 1.25 8-1/2 8-1/2
12 12 0.88 4-3/4 5-1/4 16 1.13 6-3/4 7-1/4 20 1.25 8-3/4 8-3/4
14 12 1.00 5-1/4 5-3/4 20 1.13 7 7-1/2 20 1.38 9-1/4 9-1/4
16 16 1.00 5-1/4 5-3/4 20 1.25 7-1/2 8 20 1.50 10 10
18 16 1.13 5-3/4 6-1/4 24 1.25 7-3/4 8-1/4 20 1.63 10-3/4 10-3/4
20 20 1.13 6-1/4 6-3/4 24 1.25 8 8-3/4 24 1.63 11-1/4 11-1/2
24 20 1.25 6-3/4 7-1/4 24 1.50 9 10 24 1.88 13 13-1/4

 

Class 900 Flanges Class 1500 Flanges Class 2500 Flanges
NPS # Bolts And Studs Diameter of Bolts And Studs Stud Length # Bolts And Studs Diameter of Bolts And Studs Stud Length # Bolts And Studs Diameter of Bolts And Studs Stud Length
1/4 RF RTJ 1/4 RF RTJ 1/4 RF RTJ
1/2 4 0.75 4-1/4 4-1/4 4 0.75 4-1/4 4-1/4 4 0.75 4-3/4 4-3/4
3/4 4 0.75 4-1/2 4-1/2 4 0.75 4-1/2 4-1/2 4 0.75 5 5
1 4 0.88 5 5 4 0.88 5 5 4 0.88 5-1/2 5-1/2
1-1/4 4 0.88 5 5 4 0.88 5 5 4 1.00 6 6
1-1/2 4 1.00 5-1/2 5-1/2 4 1.00 5-1/2 5-1/2 4 1.13 6-3/4 6-3/4
2 8 0.88 5-3/4 5-3/4 8 0.88 5-3/4 5-3/4 8 1.00 7 7
2-1/2 8 1.00 6-1/4 6-1/4 8 1.00 6-1/4 6-1/4 8 1.13 7-3/4 8
3 8 0.88 5-3/4 5-3/4 8 1.13 7 7 8 1.25 8-3/4 9
4 8 1.13 6-3/4 6-3/4 8 1.25 7-3/4 7-3/4 8 1.50 10 10-1/4
5 8 1.25 7-1/2 7-1/2 8 1.50 9-3/4 9-3/4 8 1.75 11-3/4 12-1/4
6 12 1.13 7-1/2 7-3/4 12 1.38 10-1/4 10-1/2 8 2.00 13-1/2 14
8 12 1.38 8-3/4 8-3/4 12 1.63 11-1/2 11-3/4 12 2.00 15 15-1/2
10 16 1.38 9-1/4 9-1/4 12 1.88 13-1/4 13-1/2 12 2.50 19-1/4 20
12 20 1.38 10 10 16 2.00 14-3/4 15-1/4 12 2.75 21-1/4 22
14 20 1.50 10-3/4 11 16 2.25 16 16-3/4
16 20 1.63 11-1/4 11-1/2 16 2.50 17-1/2 18-1/2
18 20 1.88 12-3/4 13-1/4 16 2.75 19-1/2 20-3/4
20 20 2.00 13-3/4 14-1/4 16 3.00 21-1/4 22-1/4
24 20 2.50 17-1/4 18 16 3.50 24-1/4 25-1/2

Get Instant Delivery Of High Pressure Carbon Steel Long Weld Neck Flange In India, Ask Free Sample From ANSI ASME B16.5 Class 150 Long Weld Neck Flanges.

ASME B16.5 Long Welding Neck Bore Size

DN In inchesDimensionASME B16.5 Dimensional Sizes 1/2 inches to 2 1/2 inches
125 LBS
150 LBS
300 LBS400 LBS600 LBS900 LBS1500 LBS2500 LBS
inchesmillimeterinchesmillimeterinchesmillimeterinchesmillimeterinchesmillimeterinchesmillimeterinchesmillimeter
1/2A3 1/288.93 3/495.23 3/495.23 3/495.24 3/41214 3/41215 1/4133.4
b7/1611.19/1614.39/1614.39/1614.37/822.27/822.21 3/1630.2
D21 3/834.91 3/834.91 3/834.91 3/834.91 3/834.91 3/834.91 3/834.9
D12 3/860.32 5/866.72 5/866.72 5/866.73 1/482.63 1/482.63 1/288.9
n44444444444-444
d5/815.95/815.95/815.95/815.97/822.27/822.27/822.2
3/4A3 7/898.44 5/8117.54 5/8117.54 5/8117.55 1/81305 1/81305 1/2139.7
b1/212.75/815.95/815.95/815.9125.4125.41 1/431.8
D21 11/1642.91 11/1642.91 11/1642.91 11/1642.91 11/1642.91 11/1642.91 11/1642.9
D12 3/469.83 1/482.53 1/482.53 1/482.53 1/288.93 1/288.93 3/495.2
n44444444444-444
d5/815.93/4193/4193/4197/822.27/822.27/822.2
1A4 1/41084 7/8123.84 7/8123.84 7/8123.85 7/8149.25 7/8149.26 1/4159
b9/1614.311/1617.511/1617.511/1617.51 1/828.61 1/828.61 3/834.9
D2250.8250.8250.8250.8250.8250.8250.8
D13 1/879.43 1/288.93 1/288.93 1/288.9410241024 1/4108
n44444444444444
d5/815.93/4193/4193/419125.4125.4125.4
1 1/4A4 5/8117.55 1/4133.45 1/4133.45 1/4133.46 1/41596 1/41597 1/4184.2
b5/815.93/41913/1620.613/1620.61 1/828.61 1/828.61 1/238.1
D22 1/263.52 1/263.52 1/263.52 1/263.52 1/263.52 1/263.52 1/263.5
D13 1/288.93 7/898.43 7/898.43 7/898.44 3/81114 3/81115 1/8130
n44444444444444
d5/815.93/4193/4193/419125.4125.41 1/828.6
1 1/2A51276 1/8155.66 1/8155.66 1/8155.67177.87177.88203
b11/1617.513/1620.67/822.27/822.21 1/431.81 1/431.81 3/444.5
D22 7/873 982 7/8732 7/8732 7/8732 7/8732 7/8732 7/873
D13 7/844 1/21144 1/21144 1/21144 7/81244 7/81245 3/4146
n44444444444444
d5/8. 15.97/822.27/822.27/822.21 1/828.61 1/828.61 1/431.8
2A6152.46 1/2165.16 1/2165.16 1/2165.18 1/2215.98 1/2215.99 1/4234.9
b3/4197/822.2125.4125.41 1/238.11 1/238.1250.8
D23 5/892.13 5/892.13 5/892.13 5/892.13 5/892.13 5/892.13 5/892.1
D14 3/41215127512751276 1/2165.16 1/2165.16 3/4171
n44888888888888
d3/4193/4193/4193/419125.4125.41 1/828.6
2 1/2A7177.87 1/2190.57 1/2190.57 1/2190.59 5/82449 5/824410 1/2266.7
b7/822.2125.41 1/828.61 1/828.61 5/841.31 5/841.32 1/457.2
D24 1/8104.84 1/8104.84 1/8104.84 1/8104.84 1/81054 1/81054 1/8105
D15 1/2139.75 7/8149.25 7/8149.25 7/8149.27 1/2190.57 1/2190.57 3/4197
n44888888888888
d3/4197/822.27/822.27/822.21 1/828.61 1/828.61 1/431.8

Raised Face Long Weld Neck Flange Tolerance

ASME B16.5Tolerance
A Outside Diameter (O.D.)
  • When Outside Diameter (O.D.) is 24" or less: ±1/16" (1.6 mm)
  • When Outside Diameter (O.D.) is over 24": ±1/8" (3.2 mm)
D Inside Diameter
  • 10" and smaller: ±1/32" (0.8 millimeter)
  • 12" thru 18": +1/8" (3.2 millimeter)
  • 20" and larger: -1/16" (1.6 millimeter)
B Diameter of contact face
  • 1/16" raised face: ±1/32" (0.8 millimeter)
  • 1/4" Raised Face (RF), Tongue & Groove (T/G), (male & female), (m/f): ±1/64" (0.4 mm)
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)

Long Weld Neck Flange Weight Calculator

asme b16.5 long weld neck flange can be calculated by using the following equation:

  • Mass = [ ( X + B ) / 2 * ( X – B ) / 2 * 0.0246615 * ( Y – T ) * 10-3 ] + [ ( D2 – B2 – nd2 ) * T + ( G2 – B2 ) * t ] * 6.165375 * 10-6, Assume that the flange is made of carbon steel.

600# LWN Flange Vacuum Range

  • Elastomer seal: >=1 x 10^-8 Torr – High vacuum

  • EVAC metal seal: >=1 x 10^-11 Torr – UHV


Long Weld Neck Flange Temperature range

  • Viton: -20°C to 200°C

  • Silicone: -50°C to 230°C

  • Buna: -30°C to 110°C

  • EVAC metal seal: -270°C to 150°C


Heavy Barrel Long Weld Neck Flange Dimensions

Heavy Barrel Long Weld Neck Flange Dimensions

Normal Pipe Size

(NPS)

O.D.

of

Flange

A

Raised Face

of

Diameter

B

Flange

of

Thickness


C

Bore

Diameter


D

Diameter

of Hub

at Base


J

Hub

Length


K

Nut

Stop

Diameters


NS

Nut

Relief

Diameter


NR

Nut

Relief

Length


NL

Nunber

of

Bolt

Holes

Diamete

of

Bolt

Holes

Circle Of

Bolt

Diameter


P

Approx.

Weight in KG

1/2 3 1/2 1 3/8 7/16 0.55 1 1/4 9 1 1/2 1 1/4 3/4 4 5/8 2 3/8 5
3/4 3 7/8 1 11/16 1/2 0.74 1 5/8 9 1 7/8 1 5/8 3/4 4 5/8 2 3/4 7
1 4 1/4 2 9/16 0.96 2 9 2 1/ 4 2 3/4 4 5/8 3 1/8 10
1 1/4 4 5/8 2 1/2 5/8 1.28 2 3/8 9 2 5/8 2 3/8 3/4 4 5/8 3 1/2 12
1 1/2 5 2 7/8 11/16 1.50 2 5/8 9 3 2 5/8 3/4 4 5/8 3 7/8 16
2 6 3 5/8 3/4 1.94 3 1/4 9 3 11/ 16 3 1/16 7/8 4 3/4 4 3/4 23
2 1/2 7 4 1/8 7/8 2.32 3 3/4 9 4 7/16 3 3/4 7/8 4 3/4 5 1/2 34
3 7 1/2 5 15/16 2.90 4 1/4 9 4 15/15 4 1/4 7/8 4 3/4 6 38
3 1/2 8 1/2 5 1/2 15/16 3.36 4 7/8 9 5 15/16 4 7/8 7/8 8 3/4 7 55
4 9 6 3/16 15/16 3.83 5 1/2 12 6 7/16 5 1/2 7/8 8 3/4 7 1/2 78
5 10 7 5/16 15/16 4.81 6 1/2 12 7 1/2 6 1/2 1 8 7/8 8 1/2 87
6 11 8 1/2 1 5.76 7 3/4 12 8 1/4 7 3/4 1 8 7/8 9 1/2 103
8 13 1/2 10 5/8 1 1/8 7.62 9 3/4 12 10 1/2 9 3/4 1 8 7/8 11 3/4 157
10 16 12 3/4 1 3/16 9.56 12 12 12 7/8 12 1 1/8 12 1 14 1/4 214
12 19 15 1 1/4 11.38 14 3/8 12 15 9/16 14 3/8 1 1/2 12 1 17 329
14 21 16 1/4 1 3/8 14.00 16 12 17 1/8 16 1 1/4 12 1 1/8 18 3/4 296
16 23 1/2 18 1/2 1 7/16 16.00 18 12 19 5/8 18 1 1/4 16 1 1/8 21 1/4 388
18 25 21 1 9/16 18.00 20 12 20 15/16 20 1 3/8 16 1 1/4 22 3/4 362
20 27 1/2 23 1 11/16 20.00 22 12 23 3/16 22 1 3/8 20 1 1/4 25 434
22
24 32 27 1/4 1 7/8 24.00 26 1/4 12 27 1/2 26 1/4 1 1/2 20 1 3/8 29 1/2 574

Full Barrel Long Weld Neck Flange Dimensions

Full Barrel Long Weld Neck Flange Dimensions

Normal Pipe Sizes

(NPS)

O.D

of

Flange

A

Diameter

of

RR

B

Flange

Thickness


C

Bore

Diameter


D

Diameter

of Hub

at Base


J

Hub

Length


K

Nut

Stop

Diameters


NS

Nut

Relief

Diameters


NR

Nut

Relief

Length


NL

No.

of

Bolt

Holes

Bolt

Holes

Diameter

Bolt

Circle

Diameters


P

Approx.

Weight in kg

1/2 3 1/2 1 3/8 7/16 0.50 1 1/4 9 1 1/2 1 1/4 3/4 4 5/8 2 3/8 21
3/4 3 7/8 1 11/16 1/2 0.75 1 5/8 9 1 7/8 1 5/8 3/4 4 5/8 2 3/4 27
1 4 1/4 2 9/16 1.00 2 9 2 1/ 4 2 3/4 4 5/8 3 1/8 30
1 1/4 4 5/8 2 1/2 5/8 1.25 2 3/8 9 2 5/8 2 3/8 3/4 4 5/8 3 1/2 36
1 1/2 5 2 7/8 11/16 1.50 2 5/8 9 3 2 5/8 3/4 4 5/8 3 7/8 41
2 6 3 5/8 3/4 2.00 3 1/4 9 3 11/ 16 3 1/16 7/8 4 3/4 4 3/4 57
2 1/2 7 4 1/8 7/8 2.50 3 3/4 9 4 7/16 3 3/4 7/8 4 3/4 5 1/2 79
3 7 1/2 5 15/16 3.00 4 1/4 9 4 15/15 4 1/4 7/8 4 3/4 6 86
3 1/2 8 1/2 5 1/2 15/16 3.50 4 7/8 9 5 15/16 4 7/8 7/8 8 3/4 7 110
4 9 6 3/16 15/16 4.00 5 1/2 12 6 7/16 5 1/2 7/8 8 3/4 7 1/2 164
5 10 7 5/16 15/16 5.00 6 1/2 12 7 1/2 6 1/2 1 8 7/8 8 1/2 189
6 11 8 1/2 1 6.00 7 3/4 12 8 1/4 7 3/4 1 8 7/8 9 1/2 216
8 13 1/2 10 5/8 1 1/8 8.00 9 3/4 12 10 1/2 9 3/4 1 8 7/8 11 3/4 292
10 16 12 3/4 1 3/16 10.00 12 12 12 7/8 12 1 1/8 12 1 14 1/4 382
12 19 15 1 1/4 12.00 14 3/8 12 15 9/16 14 3/8 1 1/2 12 1 17 535
14 21 16 1/4 1 3/8 14.00 16 12 17 1/8 16 1 1/4 12 1 1/8 18 3/4 585
16 23 1/2 18 1/2 1 7/16 16.00 18 12 19 5/8 18 1 1/4 16 1 1/8 21 1/4 714
18 25 21 1 9/16 18.00 20 12 20 15/16 20 1 3/8 16 1 1/4 22 3/4 711
20 27 1/2 23 1 11/16 20.00 22 12 23 3/16 22 1 3/8 20 1 1/4 25 840
22
24 32 27 1/4 1 7/8 24.00 26 1/4 12 27 1/2 26 1/4 1 1/2 20 1 3/8 29 1/2 1046


PDO Approved ASME B16.5 Long Weld Neck Flange Type


15 Inch 900LBS, SCH80, ASME B16.5 Long Weld Neck Flange

15 Inch 900LBS, SCH80, ASME B16.5 Long Weld Neck Flanges

20 Inch, ASTM A182 F304L, Long Welding Neck

20 Inch, ASTM A182 F304L, Long Welding Neck

36 Inch, SCH30, DN900, Flange Long Welding Neck

36 Inch, SCH30, DN900, Flange Long Welding Neck

Class 150 LB, 28 Inch, Raised Face Long Weld Neck Flange

Class 150 LB, 28 Inch, Raised Face Long Weld Neck Flanges


Wall Thickness SCH 40, RTJ Long Weld Neck Flange

Wall Thickness SCH 40, RTJ Long Weld Neck Flanges

DN65, RF ends, 10 Inch, Stainless Long Weld Neck Flange

DN65, RF ends, 10 Inch, Stainless Long Weld Neck Flanges

ASTM A105, 30 Inch, Carbon Steel Long Weld Neck Flange

ASTM A105, 30 Inch, Carbon Steel Long Weld Neck Flanges

EN 1092-1 Type 02 Grooved Long Weld Neck

EN 1092-1 Type 02 Grooved Long Weld Neck


16 Inch, Class 900, SCH 80, Mild Steel Long Weld Neck Flange

16 Inch, Class 900, SCH 80, Mild Steel Long Weld Neck Flanges

10 Inch, Pressure 600 LBS, Forged Long Welding Neck

10 Inch, Pressure 600 LBS, Forged Long Welding Neck

WT SCH80S, AWWA C207 Class d Slip On Long weld neck Flanges

WT SCH80S, AWWA C207 Class d Slip On Long weld neck Flanges

Class 900, 8 Inch, ASTM A182 F51, SCH80S, Long Welding Neck

Class 900, 8 Inch, ASTM A182 F51, SCH80S, Long Welding Neck



About Company

We Are EIL And IBR Approved Manufacturer, Exporter, Stockholder, Traders, Dealer, Importer, Wholesaler, Distributor, Supplier of Industrial Pipe Fittings & Flanges, Forgings And Fasteners In Mumbai, India.


Our Official Address

153 / 154, “A” Wing, Siddheshdeep Tower,
Shop No. A-28, Ground Floor, P.B. Marg, Near Navjivan Society,
Mumbai– 400 008 (India).


Telephone & Fax No.

Tel Number : +91 - 22 - 6743 7342,
+91 - 22 - 6659 5135
Fax Number : +91 - 22 - 66595135

Contact our sales representatives in the following countries:
Poland | Malaysia | Singapore | UAE | USA | UK | Philippines | Iran | Italy