Long Weld Neck Flanges Manufacturer

Specialized Long Weld Neck Flanges Manufacturer, ASME B16.47 / ANSI B16.5 LWN Flange Dimensions, RFLWN Flange.

LWN flanges are flawless self- substantiating nozzles, generally used on pressure vessels, tanks, or pipeline systems. These come inch 1/2” to 24” nominal sizes, 150#, 300#, 400#, 600#, 900#, 1500#, and 2500# pressure class, and in any length. They can come with Raised Face (RF), Flat Face (FF), and Ring Type Joint (RTJ) facing, as well as numerous others. We can also supply Weld Stubs, Studding Outlets, Heavy Barrel (HB), and other heavier self- buttressing nozzles in the common 1, 2, & 3 types.

We export top quality ANSI B16.5 and B16.47 Long Weld Neck Flange in all dimensions and pressure Class 150#, 300#, 400#, 600#, 900#, 1500#, 2500#, Heavy Barrel Long Weld Neck Flange, Series A and Series B Long Weld Neck Flange, EN 1092-1 Type 11B Long Weld Neck Flange, Long Weld Neck Flange Raised Face (RFLWN) in USA, UK, Qatar, Mexico, Nigeria, Saudi Arabia, Kuwait, Iran, Kazakhstan, Bahrain, Vietnam, Indonesia, Norway, Ghana, Colombia, Azerbaijan, Libya.

Long Weld Neck Flanges Manufacturer
Long Weld Neck Flanges Manufacturer in Mumbai, India
Long Weld Neck Flanges Supplier
Long Weld Neck Flanges Supplier in Mumbai, India

We are ISO Certified Manufacturer and Stockist of Long Weld Neck Flanges in Stainless Steel, Carbon Steel, Mild Steel, Alloy Steel, Duplex Steel, Super Duplex Steel, Hastelloy, Monel, Copper Nickel, Inconel, Incoloy, Nickel Alloy, Alloy 20, 254 Smo, Titaniun, Bronze, Aluminium, Brass at Reasonable Price.

We are Leading Exporter and Supplier of ASME/ANSI B16.5, ASME/ANSI B16.47 Heavy Barrel Long Weld Neck Flange, Series A & B LWN Flange, Class 150 Long Weld Neck Raised Face Flange, 2 Inch & 3 Inch Long Weld Neck Flange, MSS SP-44 Long Weld Neck Flange, 300# Long Weld Neck Flange RTJ, PN10 PN16 Extra Long Weld Neck Flange, Class 300#, 600#, 900#, 1500# Long Weld Neck Flange.

Long Weld Neck Flange Standard Specifications

Product Name Long Weld Neck Flanges | LWN Flange | RFLWN Flange
Size Range 1/2″ (15 NB) to 48″ (1200NB)
Class / Pressure Rating 150#, 300#, 600#, 900#, 1500#, 2500#, PN6, PN10, PN16, PN25, PN40, PN64 etc.
Standards / Dimensions ANSI/ASME B16.5, B16.47 Series A & B, B16.48, BS4504, BS 10, EN-1092, DIN, BS, GOST, MSS SP-44, ISO70051, JISB2220, BS1560-3.1, API7S-15, API7S-43, API605
Flange Face Types / Connection Type Flat Face Flange (FF), Raised Face Flange (RF), Ring Joint Flange (RTJ), Lap Joint Flange, Male and Female Flange (M&F), Large and Small Tongue-and-Groove Flange (T&G)
Dimensions ANSI B16.5, ANSI B16.47 Series A & B, ASA, API-605, MSS SP44, AWWA, Custom Drawings
Custom Design As per your drawing | AS, BS, ANSI, DIN, JIS | Equal and Reducing Configurations
Material Test Certificates (MTC) As per EN 10204 3.2 and EN 10204 3.1, Test Certificates certifying NACE MR0175, NACE MR0103
Test Certificates 100% Radiography Test Report, EN 10204/3.1B, Raw Materials Certificate, Third Party Inspection Report, etc
Tests Hydrostatic testing machine, Direct-reading Spectrograph, UI trasonic flaw detector, X-ray detector, Magnetic particle detector
Equipment / Machines Press machine, Pushing Machine, Bending machine, Sand-blasting machine, electric bevelling machine, etc.
Coating Anti-rust Paint, Oil Black Paint, Yellow Transparent, Zinc Plated, Cold and Hot Dip Galvanized
Origin Indian / USA / Japan / West Europe / Korean
Applications/Usage Offshore, Oil Field, Shipbuilding, Water System, Natural Gas, Pipe Projects, Electric Power, etc.
Top Export Network USA, UK, Qatar, Mexico, Nigeria, Saudi Arabia, Kuwait, Iran, Kazakhstan, Bahrain, Vietnam, Indonesia, Norway, Ghana, Colombia, Azerbaijan, Libya.

Long Weld Neck Flange Material Grades

Stainless Steel Long Weld Neck Flange ASTM/ASME A/SA182:- F304, F304L, F316, F316L, ASTM/ASME A/SA351:- CF3, CF3M, CF8, CF8M, DIN 1.4306, DIN 1.4301, DIN 1.4404, DIN 1.4401, DIN 1.4408, DIN 1.4308, DIN 1.4306, DIN 1.4409
Duplex Long Weld Neck Flange S31803 / S32205 A182:- Gr F51 / F52 / F53 / F54 / F55 / F57 / F59 / F60 / F61
Super Duplex Long Weld Neck Flange S32750 / S32760 A182:- Gr F51 / F52 / F53 / F54 / F55 / F57 / F59 / F60 / F61
Copper Nickel Long Weld Neck Flange ASTM / ASME SB 61 / 62 / 151 / 152, Copper Nickel 90/10 (C70600 ), Cupro Nickel 70/30 (C71500), UNS C71640
Titanium Long Weld Neck Flange ASTM B381 / ASME SB381:- Titanium Gr. 1, Titanium Gr. 2, Titanium Gr. 4, Titanium Gr. 5, Titanium Gr. 7
ASTM  R50250/GR.1 | R50400/GR.2 | R50550/GR.3 | R50700/GR.4 | GR.6 |R52400/GR.7 | R53400/GR.12 | R56320/GR.9 | R56400/GR.5
Copper Long Weld Neck Flange TP1, TP2, C10930, C11000, C11300, C11400, C11500, C11600, C12000, C12200, C12300, T1, T2, C10100, C10200, C10300, C10400, C10500, C10700, C10800, C10910, C10920, TU1, TU2, C12500, C14200, C14420, C14500, C14510, C14520, C14530, C17200, C19200, C21000, C23000, C26000, C27000, C27400, C28000, C33000, C33200, C37000, C44300, C44400, C44500, C60800, C63020, C68700, C70400, C70600, C70620, C71000, C71500, C71520, C71640, etc
Incoloy Long Weld Neck Flange ASTM B564 / ASME SB564:- Incoloy 800, 800H, 800HT (UNS N08800), 825 (UNS N08825), 925
Inconel Long Weld Neck Flange ASTM B564 / ASME SB564:- Inconel 600, 601, 625, 718, 783, 690, x750
Nickel Long Weld Neck Flange ASTM B564 / ASME SB564:- Nickel 200, Nickel 201, Nickel 205, Nickel 205LC
Hastelloy Long Weld Neck Flange ASTM B564 / ASME SB564:- Hastelloy C276 (UNS N10276), C22 (UNS N06022), C4, C2000, B2, B3, X
Monel Long Weld Neck Flange ASTM B564 / ASME SB564:- Monel 400 (UNS No. N04400), Monel 500 (UNS No. N05500)
Carbon Steel Long Weld Neck Flange ASTM/ASME A/SA105 A/SA105N and A/SA216-WCB, DIN 1.0460, DIN 1.0402, DIN 1.0619, Die Steel, ASTM A105 / ASME SA105, A105N, ASTM A350 LF2 / ASME SA350, CS High Yield ASTM A694 / A694 (F52, F56, F60, F65, F70, F80)
Alloy Steel Long Weld Neck Flange ASTM A182 / ASME SA182:- F5, F9, F11, F12, F22, F91
Alloy 20 Long Weld Neck Flange ASTM B462 / ASME SB462:- Carpenter® 20 Alloy, Alloy 20Cb-3
254 SMO Long Weld Neck Flange ASTM A182 / ASME SA182:- SMO 254/6Mo, UNS S31254, DIN 1.4547
Aluminium Long Weld Neck Flange 5052 /6061/ 6063 / 2017 / 7075 / etc.
Brass Long Weld Neck Flange 3602 / 2604 / H59 / H62 / etc.
Other Long Weld Neck Flange material Tin bronze, Alumunum bronze, Lead bronze, Nimonic 75, Nimonic 80A, Nimonic 90, AISI 4140, AISI 4130, Mild Steel, Al6XN Flanges

Long Weld Neck Flange Standards

ANSI/ASME B16.47 Flanges ANSI/ASME B16.36 Flanges ANSI/ASME B16.5 Flanges Pr. EN1902-1 Flanges
DIN Flanges JIS Flanges BS 4504 Flanges BS 10 Flanges
MSS SP-44 Flanges JIS B2220 Flanges KS B1503 Flanges UNI Flanges
SABS/SANS 1123 Flanges AS 2129, AS 4087 Flanges ISO 9624, ISO 7005-1 Flanges AWWA Flanges Standard
GOST Standard Flanges API Flanges AS/ANZ 4331.1 Flanges Series A Flange
Series B Flange SAE J518 Flanges GB Flange Norwegian Standard Flanges

Long Weld Neck Flange Class 150 Dimensions

Long Weld Neck Flanges Dimensions
Size in Inch Size in mm Outer Dia. Flange Thick. Hub OD Weld Neck OD RF Dia. RF Height PCD Hub Length No of Bolts Bolt Size UNC Machine Bolt Length RF Stud Length Hole Size ISO Stud Size
A B C D E F G H
1/2 15 90 9.6 30 21.3 34.9 2 60.3 As Required 4 1/2 50 55 5/8 M14
3/4 20 100 11.2 38 26.7 42.9 2 69.9 As Required 4 1/2 50 65 5/8 M14
1 25 110 12.7 49 33.4 50.8 2 79.4 As Required 4 1/2 55 65 5/8 M14
1 1/4 32 115 14.3 59 42.2 63.5 2 88.9 As Required 4 1/2 55 70 5/8 M14
1 1/2 40 125 15.9 65 48.3 73 2 98.4 As Required 4 1/2 65 70 5/8 M14
2 50 150 17.5 78 60.3 92.1 2 120.7 As Required 4 5/8 70 85 3/4 M16
2 1/2 65 180 20.7 90 73 104.8 2 139.7 As Required 4 5/8 75 90 3/4 M16
3 80 190 22.3 108 88.9 127 2 152.4 As Required 4 5/8 75 90 3/4 M16
3 1/2 90 215 22.3 122 101.6 139.7 2 177.8 As Required 8 5/8 75 90 3/4 M16
4 100 230 22.3 135 114.3 157.2 2 190.5 As Required 8 5/8 75 90 3/4 M16
5 125 255 22.3 164 141.3 185.7 2 215.9 As Required 8 3/4 85 95 7/8 M20
6 150 280 23.9 192 168.3 215.9 2 241.3 As Required 8 3/4 85 100 7/8 M20
8 200 345 27 246 219.1 269.9 2 298.5 As Required 8 3/4 90 110 7/8 M20
10 250 405 28.6 305 273 323.8 2 362 As Required 12 7/8 100 115 1 M24
12 300 485 30.2 365 323.8 381 2 431.8 As Required 12 7/8 100 120 1 M24
14 350 535 33.4 400 355.6 412.8 2 476.3 As Required 12 1 115 135 1 1/8 M27
16 400 595 35 457 406.4 469.9 2 539.8 As Required 16 1 115 135 1 1/8 M27
18 450 635 38.1 505 457.2 533.4 2 577.9 As Required 16 1 1/8 125 145 1 1/4 M30
20 500 700 41.3 559 508 584.2 2 635 As Required 20 1 1/8 140 160 1 1/4 M30
24 600 815 46.1 663 610 692.2 2 749.3 As Required 20 1 1/4 150 170 1 3/8 M33

Long Weld Neck Flange Class 300 Dimensions

Size in Inch Size in mm Outer Dia. Flange Thick. Hub OD Weld Neck OD RF Dia. RF Height PCD Hub Length No of Bolts Bolt Size UNC Machine Bolt Length RF Stud Length Hole Size ISO Stud Size
A B C D E F G H
1/2 15 95 12.7 38 21.3 34.9 2 66.7 As Required 4 1/2 55 65 5/8 M14
3/4 20 115 14.3 48 26.7 42.9 2 82.6 As Required 4 5/8 65 75 3/4 M16
1 25 125 15.9 54 33.4 50.8 2 88.9 As Required 4 5/8 65 75 3/4 M16
1 1/4 32 135 17.5 64 42.2 63.5 2 98.4 As Required 4 5/8 70 85 3/4 M16
1 1/2 40 155 19.1 70 48.3 73 2 114.3 As Required 4 3/4 75 90 7/8 M20
2 50 165 20.7 84 60.3 92.1 2 127 As Required 8 5/8 75 90 3/4 M16
2 1/2 65 190 23.9 100 73 104.8 2 149.2 As Required 8 3/4 85 100 7/8 M20
3 80 210 27 117 88.9 127 2 168.3 As Required 8 3/4 90 110 7/8 M20
3 1/2 90 230 28.6 133 101.6 139.7 2 184.2 As Required 8 3/4 95 110 7/8 M20
4 100 255 30.2 146 114.3 157.2 2 200 As Required 8 3/4 95 115 7/8 M20
5 125 280 33.4 178 141.3 185.7 2 235 As Required 8 3/4 110 120 7/8 M20
6 150 320 35 206 168.3 215.9 2 269.9 As Required 12 3/4 110 120 7/8 M20
8 200 380 39.7 260 219.1 269.9 2 330.2 As Required 12 7/8 120 140 1 M24
10 250 445 46.1 321 273 323.8 2 387.4 As Required 16 1 140 160 1 1/8 M27
12 300 520 49.3 375 323.8 381 2 450.8 As Required 16 1 1/8 145 170 1 1/4 M30
14 350 585 52.4 425 355.6 412.8 2 514.4 As Required 20 1 1/8 160 180 1 1/4 M30
16 400 650 55.6 483 406.4 469.9 2 571.5 As Required 20 1 1/4 165 190 1 3/8 M33
18 450 710 58.8 533 457 533.4 2 628.6 As Required 24 1 1/4 170 195 1 3/8 M33
20 500 775 62 587 508 584.2 2 685.8 As Required 24 1 1/4 185 205 1 3/8 M33
24 600 915 68.3 702 610 692.2 2 812.8 As Required 24 1 1/2 205 230 1 5/8 M39

Long Weld Neck Flange Class 400 Dimensions

Size in Inch Size in mm Outer Dia. Flange Thick. Hub OD Weld Neck OD RF Dia. RF Height PCD Hub Length No of Bolts Bolt Size UNC RF Stud Length Hole Size ISO Stud Size
A B C D E F G H
1/2 15 95 14.3 38 21.3 34.9 7 66.7 as per requirement 4 1/2 75 5/8 M14
3/4 20 115 15.9 48 26.7 42.9 7 82.6 as per requirement 4 5/8 90 3/4 M16
1 25 125 17.5 54 33.4 50.8 7 88.9 as per requirement 4 5/8 90 3/4 M16
1 1/4 32 135 20.7 64 42.2 63.5 7 98.4 as per requirement 4 5/8 95 3/4 M16
1 1/2 40 155 22.3 70 48.3 73 7 114.3 as per requirement 4 3/4 110 7/8 M20
2 50 165 25.4 84 60.3 92.1 7 127 as per requirement 8 5/8 110 3/4 M16
2 1/2 65 190 28.6 100 73 104.8 7 149.2 as per requirement 8 3/4 120 7/8 M20
3 80 210 31.8 117 88.9 127 7 168.3 as per requirement 8 3/4 125 7/8 M20
3 1/2 90 230 35 133 101.6 N/A 7 184.2 as per requirement 8 7/8 140 1 M24
4 100 255 35 146 114.3 157.2 7 200 as per requirement 8 7/8 140 1 M24
5 125 280 38.1 178 141.3 185.7 7 235 as per requirement 8 7/8 145 1 M24
6 150 320 41.3 206 168.3 215.9 7 269.9 as per requirement 12 7/8 150 1 M24
8 200 380 47.7 260 219.1 269.9 7 330 as per requirement 12 1 170 1 1/8 M27
10 250 445 54 321 273 323.8 7 387.4 as per requirement 16 1 1/8 190 1 1/4 M30
12 300 520 57.2 375 323.8 381 7 450.8 as per requirement 16 1 1/4 205 1 3/8 M33
14 350 585 60.4 425 355.6 412.8 7 514.4 as per requirement 20 1 1/4 210 1 3/8 M33
16 400 650 63.5 483 406.4 469.9 7 571.5 as per requirement 20 1 3/8 220 1 1/2 M36
18 450 710 66.7 533 457 533.4 7 628.6 as per requirement 24 1 3/8 230 1 1/2 M36
20 500 775 69.9 587 508 584.2 7 685.8 as per requirement 24 1 1/2 240 1 3/4 M39
24 600 915 76.2 702 610 692.2 7 812.8 as per requirement 24 1 3/4 265 1 7/8 M45

Long Weld Neck Flange Class 600 Dimensions

Size in Inch Size in mm Outer Dia. Flange Thick. Hub OD Weld Neck OD RF Dia. RF Height PCD Hub Length No of Bolts Bolt Size UNC RF Stud Length Hole Size ISO Stud Size
A B C D E F G H
1/2 15 95 14.3 38 21.3 34.9 7 66.7 as per requirement 4 1/2 75 5/8 M14
3/4 20 115 15.9 48 26.7 42.9 7 82.6 as per requirement 4 5/8 90 3/4 M16
1 25 125 17.5 54 33.4 50.8 7 88.9 as per requirement 4 5/8 90 3/4 M16
1 1/4 32 135 20.7 64 42.2 63.5 7 98.4 as per requirement 4 5/8 95 3/4 M16
1 1/2 40 155 22.3 70 48.3 73 7 114.3 as per requirement 4 3/4 110 7/8 M20
2 50 165 25.4 84 60.3 92.1 7 127 as per requirement 8 5/8 110 3/4 M16
2 1/2 65 190 28.6 100 73 104.8 7 149.2 as per requirement 8 3/4 120 7/8 M20
3 80 210 31.8 117 88.9 127 7 168.3 as per requirement 8 3/4 125 7/8 M20
3 1/2 90 230 35 133 101.6 N/A 7 184.2 as per requirement 8 7/8 140 1 M24
4 100 275 38.1 152 114.3 157.2 7 215.9 as per requirement 8 7/8 145 1 M24
5 125 330 44.5 189 141.3 185.7 7 266.7 as per requirement 8 1 165 1 1/8 M27
6 150 355 47.7 222 168.3 215.9 7 292.1 as per requirement 12 1 170 1 1/8 M27
8 200 420 55.6 273 219.1 269.9 7 349.2 as per requirement 12 1 1/8 190 1 1/4 M30
10 250 510 63.5 343 273 323.8 7 431.8 as per requirement 16 1 1/4 215 1 3/8 M33
12 300 560 66.7 400 323.8 381 7 489 as per requirement 20 1 1/4 220 1 3/8 M33
14 350 605 69.9 432 355.6 412.8 7 527 as per requirement 20 1 3/8 235 1 1/2 M36
16 400 685 76.2 495 406.4 469.9 7 603.2 as per requirement 20 1 1/2 255 1 5/8 M39
18 450 745 82.6 546 457 533.4 7 654 as per requirement 20 1 5/8 275 1 3/4 M42
20 500 815 88.9 610 508 584.2 7 723.9 as per requirement 24 1 5/8 285 1 3/4 M42

Long Weld Neck Flange Class 900 Dimensions

Size in Inch Size in mm Outer Dia. Flange Thick. Hub OD Weld Neck OD RF Dia. RF Height PCD Hub Length No of Bolts Bolt Size UNC RF Stud Length Hole Size ISO Stud Size
A B C D E F G H
1/2 15 120 22.3 38 21.3 34.9 7 82.6 as per requirement 4 3/4 110 7/8 M20
3/4 20 130 25.4 44 26.7 42.9 7 88.9 as per requirement 4 3/4 115 7/8 M20
1 25 150 28.6 52 33.4 50.8 7 101.6 as per requirement 4 7/8 125 1 M24
1 1/4 32 160 28.6 64 42.2 63.5 7 111.1 as per requirement 4 7/8 125 1 M24
1 1/2 40 180 31.8 70 48.3 73 7 123.8 as per requirement 4 1 140 1 1/8 M27
2 50 215 38.1 105 60.3 92.1 7 165.1 as per requirement 8 7/8 145 1 M24
2 1/2 65 245 41.3 124 73 104.8 7 190.5 as per requirement 8 1 160 1 1/8 M27
3 80 240 38.1 127 88.9 127 7 190.5 as per requirement 8 7/8 145 1 M24
4 100 290 44.5 159 114.3 157.2 7 235 as per requirement 8 1 1/8 170 1 1/4 M30
5 125 350 50.8 190 141.3 185.7 7 279.4 as per requirement 8 1 1/4 190 1 3/8 M33
6 150 380 55.6 235 168.3 215.9 7 317.5 as per requirement 12 1 1/8 190 1 1/4 M30
8 200 470 63.5 298 219.1 269.9 7 393.7 as per requirement 12 1 3/8 220 1 1/2 M36
10 250 545 69.9 368 273 323.8 7 469.9 as per requirement 16 1 3/8 235 1 1/2 M36
12 300 610 79.4 419 323.8 381 7 533.4 as per requirement 20 1 3/8 255 1 1/2 M36
14 350 640 85.8 451 355.6 412.8 7 558.8 as per requirement 20 1 1/2 275 1 5/8 M39
16 400 705 88.9 508 406.4 469.9 7 616 as per requirement 20 1 5/8 285 1 3/4 M42
18 450 785 101.6 565 457 533.4 7 685.8 as per requirement 20 1 7/8 325 2 M48
20 500 855 108 622 508 584.2 7 749.3 as per requirement 20 2 350 2 1/8 M52
24 600 1040 139.7 749 610 692.2 7 901.7 as per requirement 20 2 1/2 440 2 5/8 M64

Long Weld Neck Flange Class 1500 Dimensions

Size in Inch Size in mm Outer Dia. Flange Thick. Hub OD Weld Neck OD RF Dia. RF Height PCD Hub Length No of Bolts Bolt Size UNC RF Stud Length Hole Size ISO Stud Size
A B C D E F G H
1/2 15 120 22.3 38 21.3 34.9 7 82.6 as per requirement 4 3/4 110 7/8 M20
3/4 20 130 25.4 44 26.7 42.9 7 88.9 as per requirement 4 3/4 115 7/8 M20
1 25 150 28.6 52 33.4 50.8 7 101.6 as per requirement 4 7/8 125 1 M24
1 1/4 32 160 28.6 64 42.2 63.5 7 111.1 as per requirement 4 7/8 125 1 M24
1 1/2 40 180 31.8 70 48.3 73 7 123.8 as per requirement 4 1 140 1 1/8 M27
2 50 215 38.1 105 60.3 92.1 7 165.1 as per requirement 8 7/8 145 1 M24
2 1/2 65 245 41.3 124 73 104.8 7 190.5 as per requirement 8 1 160 1 1/8 M27
3 80 265 47.7 133 88.9 127 7 203.2 as per requirement 8 1 1/8 180 1 1/4 M30
4 100 310 54 162 114.3 157.2 7 241.3 as per requirement 8 1 1/4 195 1 3/8 M33
5 125 375 73.1 197 141.3 185.7 7 292.1 as per requirement 8 1 1/2 250 1 5/8 M39
6 150 395 82.6 229 168.3 215.9 7 317.5 as per requirement 12 1 3/8 260 1 1/2 M36
8 200 485 92.1 292 219.1 269.9 7 393.7 as per requirement 12 1 5/8 290 1 3/4 M42
10 250 585 108 368 273 323.8 7 482.6 as per requirement 12 1 7/8 335 2 M48
12 300 675 123.9 451 323.8 381 7 571.5 as per requirement 16 2 375 2 1/8 M52
14 350 750 133.4 495 355.6 412.8 7 635 as per requirement 16 2 1/4 405 2 3/8 M56
16 400 825 146.1 552 406.4 469.9 7 704.8 as per requirement 16 2 1/2 445 2 5/8 M64
18 450 915 162 597 457 533.4 7 774.7 as per requirement 16 2 3/4 495 2 7/8 M72
20 500 985 177.8 641 508 584.2 7 831.8 as per requirement 16 3 540 3 1/8 M76
24 600 1170 203.2 762 610 692.2 7 990.6 as per requirement 16 3 1/2 615 3 5/8 M90

Long Weld Neck Flange Class 2500 Dimensions

Size in Inch Size in mm Outer Dia. Flange Thick. Hub OD Weld Neck OD RF Dia. RF Height PCD Hub Length No of Bolts Bolt Size UNC RF Stud Length Hole Size ISO Stud Size
A B C D E F G H
1/2 15 135 30.2 43 21.3 34.9 7 88.9 as per requirement 4 3/4 120 7/8 M20
3/4 20 140 31.8 51 26.7 42.9 7 95.2 as per requirement 4 3/4 125 7/8 M20
1 25 160 35 57 33.4 50.8 7 108 as per requirement 4 7/8 140 1 M24
1 1/4 32 185 38.1 73 42.2 63.5 7 130.2 as per requirement 4 1 150 1 1/8 M27
1 1/2 40 205 44.5 79 48.3 73 7 146 as per requirement 4 1 1/8 170 1 1/4 M30
2 50 235 50.9 95 60.3 92.1 7 171.4 as per requirement 8 1 180 1 1/8 M27
2 1/2 65 265 57.2 114 73 104.8 7 196.8 as per requirement 8 1 1/8 195 1 1/4 M30
3 80 305 66.7 133 88.9 127 7 228.6 as per requirement 8 1 1/4 220 1 3/8 M33
4 100 355 76.2 165 114.3 157.2 7 273 as per requirement 8 1 1/2 255 1 5/8 M39
5 125 420 92.1 203 141.3 185.7 7 323.8 as per requirement 8 1 3/4 300 1 7/8 M45
6 150 485 108 235 168.3 215.9 7 368.3 as per requirement 8 2 345 2 1/8 M52
8 200 550 127 305 219.1 269.9 7 438.2 as per requirement 12 2 380 2 1/8 M52
10 250 675 165.1 375 273 323.8 7 539.8 as per requirement 12 2 1/2 490 2 5/8 M64
12 300 760 184.2 441 323.8 381 7 619.1 as per requirement 12 2 3/4 540 2 7/8 M72

In Stock Flange Types

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Swivel Ring Flange
$39.99-$77770.00

Note: Flanges Prices are depended on Material Grades, Standards, Dimensions, Sizes, Order Quantity, etc. Prices Mentioned on website are for referance purpose only. To get market leading prices for Long Weld Neck Flange contact us now.

How To Order Long Weld Neck Flanges?

  • Long Weld Neck Flange specification (example JIS, EN 1092-1, ASME B16.5, UNI, ASME B16.47 type A, DIN, etc.)
  • Nominal pipe size (NPS)
  • Long Weld Neck Flange rating (or class): flanges’ rating can range from 150 to 2500 for ASME flanges, from 5k to 30k for JIS B2220 flanges and KS1503 flanges; from PN6 till PN100 for Russian and European standard flanges (UNI, DIN, GOST 12821-80 / 12820, EN 1092-1); Class 1000/3, 600/3, 2500/3, 1600/3, 4000/3 for Standard SANS/SABS.
  • Facing Types of LWN Flange (RF, FF; RTJ): as per ASME B16.5 standard, the RF is the standard facing for flanges (other facings, like FF or RTJ, have to be ordered specifically)
  • Long Weld Neck Flange surface finish (smooth, stock, concentric serrated, etc)
  • LWN Flange Material grades (forged carbon, duplex, nickel-alloy, stainless steels or, non-ferrous materials as aluminum, copper, cupro-nickel, and bronze)
  • Long Weld Neck Flange Quantity

Long Weld Neck Flange Industries and Applications

  • Mining Support.
  • Nuclear Power Systems.
  • Fire Protection Systems.
  • Mechanical Systems and Plumbing.
  • In industrial waterworks pipe connections.
  • All sizes Heating Systems and Heat Exchangers.
  • Assemblies in the Petrochemical Industries and Oil & Gas industries.
  • vessels, Pumps, and Valves in food processing and manufacturing.

Long Weld Neck Flange Supply and Export Network

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