Products

Long weld neck flange

Short Description:

Long welding neck flange, LWN flanges are similar to standard Welding Neck flanges, but the “Neck” is considerably longer than other flanges. LWN flange is often used as a nozzle for a barrel or column. In addition, there are the type LWN Heavy Barrel (HB) and the Equal LWN Barrel (E); they have a different shapes and thicker “Wall”.


Product Detail

Product Tags

Molding process

Through the forging process, using mold forming, and then through machining to complete the product processing.

Production scope

DN15-DN2000

Main material

Carbon steel: A105, SS400, SF440 RST37.2, S235JRG2, P250GH, C22.8.

Stainless Steel: F304 F304L F316 F316L 316Ti, Copper etc.

Application condition

Widely used in petrochemical, coal chemical, refining, oil and gas transmission, marine environment, power, heating and other projects.

Product characteristics

Long welding neck flange, LWN flanges are similar to standard Welding Neck flanges, but the "Neck" is considerably longer than other flanges. LWN flange is often used as a nozzle for a barrel or column. In addition, there are the type of LWN Heavy Barrel (HB) and the Equal LWN Barrel (E); they have different shapes and thicker "Wall".

SPECIFICATION OF LONG WELD NECK FLANGE

Type: LWN Forged Flange, Long welding neck flange.
Material: Standard: ANSI/DIN/JIS.
Pressure: ANSI class 150, 300, 600, 1500, 2500, DIN PN6, PN10, PN16, PN25, PN40, PN64, PN100, PN160.
Packing: No Fumigate or Fumigate Plywood/Wood Pallet or Case.
Surface Treatment: Anti-rust Oil, Transparent/Yellow/Black Anti-rust Paint, Zinc, Hot dipped Galvanized.
Rich production technology, advanced equipment, high automation degree and high production precision, complete molding. As the designated supplier of major energy enterprise groups under the jurisdiction of SASAC, the company has won a number of national, and provincial reputation.
150LB LONG WELD NECK FLANGE
Elite offers a wide range of flanges like 150LBS Long Welding Neck Flange, LWN Flange, SO, WN, BL, SW, LJ etc., include 150lb, 300lb, 600lb, 900lb, 1500lb, 2500lb with raised face, flat face, tongue, groove face etc., which is precisely engineered in accordance with international quality standards totally. We offer these flanges in various dimensions as per the specifications provided by our clients. To gain optimum client satisfaction, we ensure safe packaging and prompt delivery of the ordered consignment.

DIMENSION OF 150LBS LONG WELD NECK FLANGE
Nominal
Pipe
Size
Outside
Diameter
Thickness
of
Flange
Min.
O.D. of
Raised
Face
Hub
Diameter
at  Bevel
Diameter
of Bore
Length Through  Hub Diameter
of Bolt
Circle
Number
of Holes
Diameter
of Holes
O C R A B H H1 BC d
1/2" 89 11.1 34.9 30.2 12.7 228. 6 304. 8 60.5 4 15.8
3/4" 98.5 12.7 42.9 38.1 19.1 228. 6 304. 8 69.9 4 15.8
1" 108. 0 14.3 50.8 50.8 25.4 228. 6 304. 8 79.4 4 15.8
1-1/4" 117. 5 15.9 63.5 60.3 31.8 228. 6 304. 8 88.9 4 15.8
1-1/2" 127. 0 17.5 73 66.7 38.1 228. 6 304. 8 98.4 4 15.8
2" 152. 5 19.1 92.1 82.5 50.8 228. 6 304. 8 120. 7 4 19
2-1/2" 178. 0 22.2 104. 8 95.2 63.5 228. 6 304. 8 139. 7 4 19
3" 190. 5 23.8 127. 0 107. 9 76.2 228. 6 304. 8 152. 4 4 19
3-1/2" 216. 0 23.8 139. 9 124. 0 88.9 228. 6 304. 8 177. 8 8 19
4" 228. 5 23.8 157. 2 139. 7 101. 6 228. 6 304. 8 190. 5 8 19
5" 254. 0 23.8 185. 7 165. 1 127. 0 228. 6 304. 8 215. 9 8 22.5
6" 279. 5 25.4 215. 9 196. 8 152. 4 228. 6 304. 8 241. 3 8 22.5
8" 343. 0 28.6 269. 9 247. 6 203. 2 228. 6 304. 8 298. 4 8 22.5
10" 406. 5 30.2 323. 9 304. 8 254. 0 228. 6 304. 8 361. 9 12 25.5
12" 482. 5 31.8 381. 0 365. 1 304. 8 228. 6 304. 8 431. 8 12 25.5
14" 533. 5 34.9 412. 8 406. 4 355. 6 228. 6 304. 8 476. 2 12 28.5
16" 597. 0 36.5 469. 9 457. 2 406. 4 228. 6 304. 8 539. 7 16 28.5
18" 635. 0 39.7 533. 4 508. 0 457. 2 228. 6 304. 8 577. 8 16 31.8
20" 698. 5 42.9 584. 2 558. 8 508. 0 228. 6 304. 8 635. 0 20 31.8
24" 813. 0 47 692. 2 666. 7 609. 6 228. 6 304. 8 749. 3 20 35.1

300LB LONG WELD NECK FLANGE
Elite offers a wide range of flanges like 300LBS Long Welding Neck Flange ,LWN Flange, SO, WN, BL, SW, LJ etc., include 150lb, 300lb, 600lb, 900lb, 1500lb, 2500lb with raised face, flat face, tongue, groove face etc., which is precisely engineered in accordance with international quality standards totally. We offer these flanges in various dimensions as per the specifications provided by our clients. To gain optimum client satisfaction, we ensure safe packaging and prompt delivery of the ordered consignment.

DIMENSION OF 300LBS LONG WELD NECK FLANGE
Nominal
Pipe
Size
Outside
Diameter
Thickness
of
Flange
Min.
O.D. of
Raised
Face
Hub
Diameter
at Bevel
Diameter
of Bore
Length Through Hub Diameter
of Bolt
Circle
Number
of Holes
Diameter
of Holes
O C R A B H H1 BC d
1/2" 95.5 14.3 34.9 38.1 12.7 228. 6 304. 8 66.7 4 15.8
3/4" 117. 5 15.9 42.9 47.6 19.1 228. 6 304. 8 82.5 4 19
1" 124. 0 17.5 50.8 54 25.4 228. 6 304. 8 88.9 4 19
1-1/4" 133. 5 19.1 63.5 63.5 31.8 228. 6 304. 8 98.4 4 19
1-1/2" 155. 5 20.6 73 69.8 38.1 228. 6 304. 8 114. 3 4 22.5
2" 165. 0 22.2 92.1 82.5 50.8 228. 6 304. 8 127. 0 8 19
2-1/2" 190. 5 25.4 104. 8 100. 0 63.5 228. 6 304. 8 149. 2 8 22.5
3" 209. 5 28.6 127. 0 117. 5 76.2 228. 6 304. 8 168. 3 8 22.5
3-1/2" 228. 5 30.2 139. 7 133. 4 88.9 228. 6 304. 8 184. 1 8 22.5
4" 254. 0 31.8 157. 2 146. 0 101. 6 228. 6 304. 8 200. 0 8 22.5
5" 279. 5 34.9 185. 7 177. 8 127. 0 228. 6 304. 8 234. 9 8 22.5
6" 317. 5 36.5 215. 9 206. 4 152. 4 228. 6 304. 8 269. 9 12 22.5
8" 381. 0 41.3 269. 9 260. 3 203. 2 228. 6 304. 8 330. 2 12 25.5
10" 444. 5 47.6 323. 9 320. 7 254. 0 228. 6 304. 8 387. 3 16 28.5
12" 520. 5 50.8 381. 0 374. 6 304. 8 228. 6 304. 8 450. 8 16 31.8
14" 584. 0 54 412. 8 425. 4 355. 6 228. 6 304. 8 514. 3 20 31.8
16" 647. 5 57.2 469. 9 482. 6 406. 4 228. 6 304. 8 571. 5 20 35.1
18" 711. 0 60.3 533. 4 533. 4 457. 2 228. 6 304. 8 628. 6 24 35.1
20" 774. 5 63.5 584. 2 587. 3 508. 0 228. 6 304. 8 685. 8 24 35.1
24" 914. 5 69.9 692. 2 701. 6 609. 6 228. 6 304. 8 812. 8 24 41.2

400LB LONG WELD NECK FLANGE
Elite offers a wide range of flanges like 400lbs Long Welding Neck Flange, SO, WN, BL, SW, LJ etc., include 150lb, 300lb, 600lb, 900lb, 1500lb, 2500lb with raised face, flat face, tongue, groove face etc., which is precisely engineered in accordance with international quality standards totally. We offer these flanges in various dimensions as per the specifications provided by our clients. To gain optimum client satisfaction, we ensure safe packaging and prompt delivery of the ordered consignment.

DIMENSION OF 400LBS LONG WELD NECK FLANGE
Nominal
Pipe
Size
Outside
Diameter
Thickness
of
Flange
Min.
O.D. of
Raised
Face
Hub
Diameter
at Bevel
Diameter
of Bore
Length Through Hub Diameter
of Bolt
Circle
Number
of Holes
Diameter
of Holes
O C R A B H H1 BC d
1" 124. 0 17.5 50.8 54 25.4 228. 6 304. 8 88.9 4 19
1-1/4" 133. 5 20.6 63.5 63.5 31.8 228. 6 304. 8 98.4 4 19
1-1/2" 155. 5 22.2 73 69.8 38.1 228. 6 304. 8 114. 3 4 22.5
2" 165. 0 25.4 92.1 82.5 50.8 228. 6 304. 8 127. 0 8 19
2-1/2" 190. 5 28.6 104. 8 100. 0 63.5 228. 6 304. 8 149. 2 8 22.5
3" 209. 5 31.8 127. 0 117. 5 76.2 228. 6 304. 8 168. 1 8 22.5
3-1/2" 228. 5 34.9 139. 7 133. 4 88.9 228. 6 304. 8 184. 2 8 25.5
4" 254. 0 34.9 157. 2 146. 0 101. 6 228. 6 304. 8 200. 0 8 25.5
5" 279. 5 38.1 185. 7 177. 8 127. 0 228. 6 304. 8 234. 9 8 25.5
6" 317. 5 41.3 215. 9 206. 4 152. 4 228. 6 304. 8 269. 9 12 25.5
8" 381. 0 47.6 269. 9 260. 3 203. 2 228. 6 304. 8 330. 2 12 28.5
10" 444. 5 54 323. 9 320. 7 254. 0 228. 6 304. 8 387. 3 16 31.8
12" 520. 5 57.2 381. 0 374. 6 304. 8 228. 6 304. 8 450. 8 16 35.1
14" 584. 0 60.3 412. 8 425. 4 355. 6 228. 6 304. 8 514. 3 20 35.1
16" 647. 5 63.5 469. 9 482. 6 406. 4 228. 6 304. 8 571. 5 20 38.1
18" 711. 0 66.7 533. 4 533. 4 457. 2 228. 6 304. 8 628. 6 24 38.1
20" 774. 5 69.9 584. 2 587. 3 508. 0 228. 6 304. 8 685. 8 24 41.2
24" 914. 5 76.2 692. 2 701. 6 609. 6 228. 6 304. 8 812. 8 24 47.8

600LB LONG WELD NECK FLANGE
Elite offers a wide range of flanges like 600LBS Long Welding Neck Flange, SO, WN, BL, SW, LJ etc., include 150lb, 300lb, 600lb, 900lb, 1500lb, 2500lb with raised face, flat face, tongue, groove face etc., which is precisely engineered in accordance with international quality standards totally. We offer these flanges in various dimensions as per the specifications provided by our clients. To gain optimum client satisfaction, we ensure safe packaging and prompt delivery of the ordered consignment.

DIMENSION OF 600LBS LONG WELDING NECK FLANGE
Nominal
Pipe
Size
Outside
Diameter
Thickness
of
Flange
Min.
O.D. of
Raised
Face
Hub
Diameter
at Bevel
Diameter
of Bore
Length Through Hub Diameter
of Bolt
Circle
Number
of Holes
Diameter
of Holes
O C R A B H H1 BC d
1" 124. 0 17.5 50.8 54 25.4 228. 6 304. 8 88.9 4 19
1-1/4" 133. 5 20.6 63.5 63.5 31.8 228. 6 304. 8 98.4 4 19
1-1/2" 155. 5 22.2 73 69.8 38.1 228. 6 304. 8 114. 3 4 22.5
2" 165. 0 25.4 92.1 82.5 50.8 228. 6 304. 8 127. 0 8 19
2-1/2" 190. 5 28.6 104. 8 100. 0 63.5 228. 6 304. 8 149. 2 8 22.5
3" 209. 5 31.8 127. 0 117. 5 76.2 228. 6 304. 8 168. 1 8 22.5
3-1/2" 228. 5 34.9 139. 7 133. 4 88.9 228. 6 304. 8 184. 2 8 25.5
4" 273. 0 38.1 157. 2 152. 4 101. 6 228. 6 304. 8 215. 9 8 25.5
5" 330. 0 44.5 185. 7 190. 5 127. 0 228. 6 304. 8 266. 7 8 28.5
6" 355. 5 47.6 215. 9 222. 2 152. 4 228. 6 304. 8 292. 1 12 28.5
8" 419. 0 55.6 269. 9 273. 0 203. 2 228. 6 304. 8 349. 3 12 31.8
10" 508. 0 63.5 323. 9 342. 9 254. 0 228. 6 304. 8 431. 8 16 35.1
12" 559. 0 66.7 381. 0 400. 0 304. 8 228. 6 304. 8 489. 0 20 35.1
14" 603. 5 69.9 412. 8 431. 8 355. 6 228. 6 304. 8 527. 1 20 38.1
16" 686. 0 76.2 469. 9 495. 3 406. 4 228. 6 304. 8 603. 3 20 41.2
18" 743. 0 82.6 533. 4 546. 1 457. 2 228. 6 304. 8 654. 1 20 44.5
20" 813. 0 88.9 584. 2 609. 6 508. 0 228. 6 304. 8 723. 9 24 44.5
24" 940. 0 101. 6 692. 2 717. 5 609. 6 228. 6 304. 8 838. 2 24 50.8

900LB LONG WELD NECK FLANGE
Elite offers a wide range of flanges like 900LBS Long Welding Neck Flange, SO, WN, BL, SW, LJ etc., include 150lb, 300lb, 600lb, 900lb, 1500lb, 2500lb with raised face, flat face, tongue, groove face etc., which is precisely engineered in accordance with international quality standards totally. We offer these flanges in various dimensions as per the specifications provided by our clients. To gain optimum client satisfaction, we ensure safe packaging and prompt delivery of the ordered consignment.

DIMENSION OF 900LBS LONG WELDING NECK FLANGE
Nominal
Pipe
Size
Outside
Diameter
Thickness
of
Flange
Min.
O.D. of
Raised
Face
Hub
Diameter
at Bevel
Diameter
of Bore
Length Through Hub Diameter
of Bolt
Circle
Number
of Holes
Diameter
of Holes
O C R A B H H1 BC d
1" 149. 5 28.6 50.8 52.4 25.4 228. 6 304. 8 101. 6 4 25.5
1-1/4" 159. 0 28.6 63.5 63.5 31.8 228. 6 304. 8 111. 1 4 25.5
1-1/2" 178. 0 31.8 73 69.9 38.1 228. 6 304. 8 123. 8 4 28.5
2" 216. 0 38.1 92.1 104. 8 50.8 228. 6 304. 8 165. 1 8 25.5
2-1/2" 244. 5 41.3 104. 8 123. 8 63.5 228. 6 304. 8 190. 5 8 28.5
3" 241. 5 38.1 127. 0 127. 0 76.2 228. 6 304. 8 190. 5 8 25.5
4" 292. 0 44.5 157. 2 158. 7 101. 6 228. 6 304. 8 235. 0 8 31.8
5" 349. 5 50.8 185. 7 190. 5 127. 0 228. 6 304. 8 279. 4 8 35.1
6" 381. 0 55.6 215. 9 235. 0 152. 4 228. 6 304. 8 317. 5 12 31.8
8" 470. 0 63.5 269. 9 298. 5 203. 2 228. 6 304. 8 393. 7 12 38.1
10" 546. 0 69.9 323. 9 368. 3 254. 0 228. 6 304. 8 469. 9 16 38.1
12" 609. 5 79.4 381. 0 419. 1 304. 8 228. 6 304. 8 533. 4 20 38.1
14" 641. 5 85.7 412. 8 450. 9 355. 6 228. 6 304. 8 558. 8 20 41
16" 705. 0 88.9 469. 9 508. 0 406. 4 228. 6 304. 8 616. 0 20 44.5
18" 787. 5 101. 6 533. 4 565. 2 457. 2 228. 6 304. 8 685. 8 20 50.8
20" 857. 5 108. 0 584. 2 622. 3 508. 0 228. 6 304. 8 749. 3 20 54
24" 1014.5 139. 7 692. 2 749. 3 609. 6 228. 6 304. 8 901. 7 20 66.5

1500LB LONG WELD NECK FLANGE
Elite offers a wide range of flanges like 1500LBS Long Welding Neck Flange , SO, WN, BL, SW, LJ etc., include 150lb, 300lb, 600lb, 900lb, 1500lb, 2500lb with raised face, flat face, tongue, groove face etc., which is precisely engineered in accordance with international quality standards totally. We offer these flanges in various dimensions as per the specifications provided by our clients. To gain optimum client satisfaction, we ensure safe packaging and prompt delivery of the ordered consignment.

DIMENSION OF 1500LBS LONG WELDING NECK FLANGE
Nominal
Pipe
Size
Outside
Diameter
Thickness
of
Flange
Min.
O.D. of
Raised
Face
Hub
Diameter
at Bevel
Diameter
of Bore
Length Through Hub Diameter
of Bolt
Circle
Number
of Holes
Diameter
of Holes
O C R A B H H1 BC d
1" 149. 5 28.6 50.8 52.4 25.4 228. 6 304. 8 101. 6 4 25.5
1-1/4" 159. 0 28.6 63.5 63.5 31.8 228. 6 304. 8 111. 1 4 25.5
1-1/2" 178. 0 31.8 73 69.9 38.1 228. 6 304. 8 123. 8 4 28.5
2" 216. 0 38.1 92.1 104. 8 50.8 228. 6 304. 8 165. 1 8 25.5
2-1/2" 244. 5 41.3 104. 8 123. 8 63.5 228. 6 304. 8 190. 5 8 28.5
3" 267. 0 47.6 127. 0 133. 4 76.2 228. 6 304. 8 203. 2 8 31.8
4" 311. 0 54 157. 2 161. 9 101. 6 228. 6 304. 8 241. 3 8 35.1
5" 374. 5 73 185. 7 196. 9 127. 0 228. 6 304. 8 292. 1 8 41
6" 393. 5 82.6 215. 9 228. 6 152. 4 228. 6 304. 8 317. 5 12 38.1
8" 483. 0 92.1 269. 9 292. 1 203. 2 228. 6 304. 8 393. 7 12 44.5
10" 584. 0 108. 0 323. 9 368. 3 254. 0 406. 4 406. 4 482. 6 12 50.8
12" 673. 0 123. 8 381. 0 450. 9 304. 8 406. 4 406. 4 571. 5 16 54
14" 749. 5 133. 4 412. 8 495. 3 355. 6 635. 0 16 60.5
16" 825. 5 146. 1 469. 9 552. 5 406. 4 704. 9 16 66.5
18" 914. 5 161. 9 533. 4 596. 9 457. 2 774. 7 16 73
20" 984. 0 177. 8 584. 2 641. 4 508. 0 831. 9 16 79.5
24" 1168.5 203. 2 692. 2 762. 0 609. 6 990. 6 16 92

2500LB LONG WELD NECK FLANGE
Elite offers a wide range of flanges like 2500LBS Long Welding Neck Flange ,SO, WN, BL, SW,LJ etc., include 150lb, 300lb, 600lb, 900lb, 1500lb, 2500lb with raised face, flat face, tongue, groove face etc., which is precisely engineered in accordance with international quality standards totally.We offer these flanges in various dimensions as per the specifications provided by our clients. To gain optimum client satisfaction, we ensure safe packaging and prompt delivery of the ordered consignment.

DIMENSION OF 2500LBS LONG WELDING NECK FLANGE
Nominal
Pipe
Size
Outside
Diameter
Thickness
of
Flange
Min.
O.D. of
Raised
Face
Hub
Diameter
at Bevel
Diameter
of Bore
Length Through Hub Diameter
of Bolt
Circle
Number
of Holes
Diameter
of Holes
O C R A B H H1 BC d
1" 159. 0 34.9 50.8 57.2 25.4 25.4 304. 8 108. 0 4 25.5
1-1/4" 184. 0 38.1 63.5 73 31.8 31.8 304. 8 130. 2 4 28.5
1-1/2" 203. 0 44.5 73 79.4 38.1 38.1 304. 8 146. 1 4 31.8
2" 235. 0 50.8 92.1 95.3 50.8 50.8 304. 8 171. 5 8 28.5
2-1/2" 267. 0 57.2 104. 8 114. 3 63.5 63.5 304. 8 196. 9 8 31.8
3" 305. 0 66.7 127. 0 133. 4 76.2 76.2 304. 8 228. 6 8 35
4" 355. 5 76.2 157. 2 165. 1 101. 6 101. 6 304. 8 273. 1 8 41
5" 419. 0 92.1 185. 7 203. 2 127. 0 127. 0 304. 8 323. 9 8 48
6" 483. 0 108. 0 215. 9 235. 0 152. 4 152. 4 304. 8 368. 3 8 54
8" 552. 5 127. 0 269. 9 304. 8 203. 2 203. 2 304. 8 438. 2 12 54
10" 673. 0 165. 1 323. 9 374. 7 254. 0 254. 0 406. 4 539. 8 12 66.5
12" 762. 0 184. 2 381. 0 441. 3 304. 8 304. 8 406. 4 619. 1 12 73

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