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Long Weld Neck Flanges



Long weld neck flanges specification

Available Size Types Of Face Schedule
  • DN15 - DN1400
  • PN 2.5 - PN 400
  • 1/2" to 48"
  • raised face long weld neck flange
  • RTJ long weld neck flange
  • Flat Face
  • Tongue and Groove (T&G)
  • Male Female face (M&F)
  • SCH 10
  • SCH 20
  • SCH 40
  • SCH 60
  • SCH 80
  • SCH 100
  • SCH 120
  • SCH 160
  • SCH 180
  • SCH XXS
Machine Production Process ASME Standards
  • Electric bevelling machine
  • Bending machine
  • Sand-blasting machine
  • Pushing machine
  • Press machine
  • Raw Material
  • Inspection
  • Cutting
  • Forging
  • Heat Treatment
  • Forging Rolling
  • Final Inspection
  • Rust Prevention
  • Marking
  • Heat Number
  • Packaging
  • ASME B16.47
  • ASME B16.5
  • ANSI B16.5
Bolt Hole Application Buying Tips Of WN flange
4 To 24
  • Industrial piping connection
  • Aerospace constructions
  • Petrochemical plants
  • Nuclear power
  • Refinery industry
  • Gas & Oil applications
  • Size
  • Length
  • O.D.
  • Pressure Rating
  • Type
  • Mass
  • Materials
  • End Type
  • Thickness
  • Tested
  • Style
Types of Stainless Steel Long Weld Neck Flange Pressure Rating Manufacturing Standards and Origin
  • Long welding neck flange
  • Long forged weld neck flanges
  • Raised face long weld neck flange
  • 150 PSI up to 3" to 24"
  • 300 PSI up to 3" to 20"
  • 600 PSI up to 3" to 20"
  • 900 PSI up to 3" to 16"
  • 1500 PSI up to 3" to 10"
  • 2500 PSI up to 3" to 8"
  • BS 10- Australia and UK
  • BS EN 1092-1 - Europe
  • Ghost - Russia
  • MSS SP44 - USA
  • DIN- Germany
  • JIS - Japan
  • API-605 - USA
  • ASME B16.5- USA
  • UNI 2276/ 6091 - Italy
  • AWWA - USA
  • ANSI B16.5 - USA
  • PN 10 to PN400- Europe
Markings On carbon steel long weld neck flange Types Of Coating Machining Process
  • Size
  • Grade
  • Heat Number
  • Face type
  • Schedule
  • ASTM material
  • Pressure rating
  • Country origin
  • Manufacturer logo
  • Oil black paint
  • Zinc plated
  • Yellow paint
  • Hot dip galvanized
  • Anti-rust oil
  • Heat treatment
  • Forming
  • Material selection
  • Quality control
  • Forging
  • Machining
  • Surface finish
  • Material cutting
  • Shaping
  • Inspection
Test Certification Value Added Services Inspection Criteria
EN 10204 3.1
  • MTR certification
  • Coating
  • Marking tagging
  • Polishing
  • Cutting
  • Beveling end
  • Tensile test
  • Material inspection
  • PMI test
  • Visual inspection
  • Impact test
  • Hardness test
Manufacturing Method Others Name Of Long Weld Neck Flanges Surface
  • Cast
  • Plate
  • Forged
  • LWNRF flange
  • Long welding neck flange
  • Flat surfaces
  • Convex surfaces
  • Ring joint surface
  • Concave and convex surfaces
  • Grooved surface

Stainless steel long neck flange price list

Not happy with your current long welding neck flange supplier? Get connected with an established LWN flange stockist in Mumbai

Stainless steel long neck flange price list

(Grade : F316L, SCH 80) Price per piece in US Dollar

  • 3 inch, RF, CL 150
  • 4 inch, RF, CL 150
  • 6 inch, RF, CL 150
  • 8 inch, RF, CL 150
  • 10 inch, Class 150, RF
  • 12 inch, Class 150, RF
  • 14 inch, Class 150, RF
  • 16 inch, Class 150, RF
  • US $10.25
  • US $14.92
  • US $22.43
  • US $28.27
  • US $41.47
  • US $52.27
  • US $79.03
  • US $100.57


Available types Of ASME B16.5 long weld neck flanges

LWNRF flange

LWNRF flange

Long welding neck flange

Long welding neck flange

LWN flange

LWN flange

Flange long welding neck

Flange long welding neck

Long forged weld neck flanges

Long forged weld neck flanges

Raised face long weld neck flange

Raised face long weld neck flange

Stainless steel long neck flange

Stainless steel long neck flange

Long WN flange

Long WN flange

Heavy barrel long weld neck flange

Heavy barrel long weld neck flange

Long welding neck

Long welding neck

LWN RF flange

LWN RF flange

Long neck welded flanges

Long neck welded flanges



Armech Alloy offers long forged weld neck flanges and raised face long weld neck flange in self-reinforced nozzle designs



Self-reinforced nozzle designs of LWNRF flange

Self-reinforced nozzle designs of LWNRF flange


Find complete information about stainless steel long neck flange length and carbon steel long WN flange barrel varieties


Carbon steel long neck flange length and barrel varieties

Carbon steel long neck flange length and barrel varieties


We provide heavy barrel long weld neck flange test certificates with MTC report, check Inconel 625 LWNRF pipe flange dimensions, and weight chart as per ASME B16.5


Class 150 long weld neck flange dimensions

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

300# long weld neck flange dimensions

300# long weld neck flange dimensions
Normal Pipe Size In Inch Y W BH Holes O Tf X B
1/2 228.6 66.5 15.9 4 95.3 12.7 38.1 12.7
3/4 228.6 82.6 19.1 4 117.3 14.2 47.8 19.1
1 228.6 88.9 19.1 4 124.0 15.7 53.8 25.4
1-1/4 228.6 98.6 19.1 4 133.4 17.5 63.5 31.8
1-1/2 228.6 114.3 22.2 4 155.4 19.1 69.9 38.1
2 228.6 127.0 19.1 8 165.1 20.6 84.1 50.8
2-1/2 228.6 149.4 22.2 8 190.5 23.9 100.1 63.5
3 228.6 168.1 22.2 8 209.6 26.9 117.3 76.2
3-1/2 228.6 184.2 22.2 8 228.6 28.4 133.4 88.9
4 228.6 200.2 22.2 8 254.0 30.2 146.1 101.6
5 304.8 235.0 22.2 8 279.4 33.3 177.8 127.0
6 304.8 269.7 22.2 12 317.5 35.1 206.2 152.4
8 304.8 330.2 25.4 12 381.0 39.6 260.4 203.2
10 304.8 387.4 28.6 16 444.5 46.0 320.5 254.0
12 304.8 450.9 31.8 16 520.7 49.3 374.7 304.8
14 304.8 514.4 31.8 20 584.2 52.3 425.5 355.6
16 304.8 571.5 34.9 20 647.7 55.6 482.6 406.4
18 304.8 628.7 34.9 24 711.2 58.7 533.4 457.2
20 304.8 685.8 34.9 24 774.7 62.0 587.2 508.0
24 304.8 812.8 41.3 24 914.4 68.3 701.5 609.6


LWNRF flange weight chart

NPS Class 150 long weld neck flanges Class 300 long weld neck flanges
1/2 0.7 0.8
1 1.1 1.7
1.1/2 1.8 3.2
2 2.7 3.6
3 5.2 7.3
4 7.5 11.8
5 9.2 16
6 11.0 20.2
8 18.4 31.2
10 25.5 44.3
12 37 63.5
14 51 86
16 61.5 112
18 71.5 141
20 85 173
24 119 248


Raised face long weld neck flange pressure ratings

Temperature °F (Fahrenheit) CL 900 CL1500 CL 2500 CL 150 CL 300 CL 600
-20 to 100 2160 3600 6000 275 720 1440
200 1800 3000 5000 230 600 1200
300 1620 2700 4500 205 540 1080
400 1490 2485 4140 190 495 995
500 1395 2330 3880 170 465 930
600 1310 2185 3640 140 435 875
700 1275 2125 3540 110 425 850
800 1210 2015 3360 80 405 805
900 1165 1945 3240 50 390 780
1000 965 1605 2675 20 320 640
1050 925 1545 2570 20 310 615
1100 770 1285 2145 20 255 515
1150 595 995 1655 20 200 400
1200 465 770 1285 20 155 310
1250 340 565 945 20 115 225
1300 255 430 715 20 85 170
1350 185 310 515 20 60 125
1400 145 240 400 20 50 95
1450 105 170 285 15 35 70
1500 80 135 230 10 25 55


Material Of LWN flange

Stainless Steel Long Weld Neck Flanges Carbon Steel Long Weld Neck Flanges Alloy Steel Long Weld Neck Flanges
  • ASTM A105 Long Weld Neck flange
  • ASME SA350 LF2 Class 2
  • LTCS
  • SA694 F42
  • ASTM A694 Grade F46
  • Carbon steel F56
  • ASME SA 694 F52
  • SA694 F60
  • High Yield F65
  • A694 Gr F70
  • A182 Gr F1
  • ASME A182 Grade F5
  • Alloy Steel F9
  • F11 Alloy Steel
  • SA182 F22
  • ASTM A182 F91
Super Duplex Long Weld Neck Flanges Duplex Long Weld Neck Flanges Titanium Long Weld Neck Flanges
  • ASTM A182 Grade F53 long weld neck flanges
  • SA182 Gr F55 LWNRF flange
  • ASME SA 182 super duplex F60 long welding neck flange
  • A182 F61 LWN flange
  • ASME SA182 F51 flange long welding neck
  • ASTM A182 F44 long forged weld neck flanges
  • Titanium Grade 2 : ASTM B381 UNS R50400 raised face long weld neck flange
  • Titanium Grade 5 : ASTM B381 USN R56400 long neck flange
Inconel Long Weld Neck Flanges Incoloy Long Weld Neck Flanges Hastelloy Long Weld Neck Flanges
  • Inconel 600 : ASTM B564 UNS N06600 long WN flange
  • Inconel 625 : ASTM B564 UNS N06625 LWNRF pipe flange
  • Inconel 601 : ASTM B564 UNS N06601 heavy barrel long weld neck flange
  • Inconel 617 : ASTM B564 UNS N06617 long welding neck flange
  • Inconel 686 : ASTM B564 UNS N06686 long welding neck
  • Inconel 690 : ASTM B564 UNS N06690 LWN RF flange
  • Inconel 725 : ASTM B564 UNS N07725 long weld flange
  • 693, MA754, 751, 706, 718, 601GC, MA758, 783, X-750, 602CA, 603XL, 718SPF
  • Incoloy 800 : ASTM B407 UNS N08800 welded flanges
  • Incoloy 800H : ASTM B407 UNS N08810 long neck flange
  • Incoloy 800HT : ASTM B407 UNS N08811 LWN RF flange
  • Incoloy 825 : ASTM B407 UNS N08825 long welding flange
  • 903, 907, 945, 925, 926, 832, 330, 25-6HN, DS, 028, 020,909, 945X, MA956, 908, A-286, 27-7MO, 864, 890
  • Hastelloy C22 : ASTM B366 UNS N06022 long welded flanges
  • Hastelloy C276 : ASTM B366 UNS N10276 RF LWN flange
  • Hastelloy C2000 : ASTM B366 UNS N06200 LWN flange with NPT thread
  • B-2, B, B-3, C, C-4, G-35, G-30, N, G-3, S, W, X
Monel Long Weld Neck Flanges Nickel Alloy Long Weld Neck Flanges Copper Nickel Long Weld Neck Flanges
  • Monel 400 : ASTM B564 UNS N04400
  • Monel 401 : ASTM B564 UNS N04401
  • Monel K500 : ASTM B564 UNS N05500
  • Nickel Alloy 200 : ASTM B564 UNS N02200
  • Nickel Alloy 201 : ASTM B564 UNS N02201
  • Copper Nickel 90/10 : ASTM B151 UNS C70600
  • Copper Nickel 70/30 : ASTM B151 UNS C71500