Nextgen Steel & Alloys is a foremost and authorized company that produces outstanding quality Weld Neck Flanges products. Our team of professionals trusts in innovation, research-based production processes and quality. Hence, we accompany quality training to match the most advanced expectations for the latest technology-based products. Furthermore, along with quality, we ensure to offer products of different grades in an intact form without affecting its quality. Therefore, we at Nextgen Steel & Alloys give a comprehensive range of quality flange products considering client requirements. Additionally, we give primary preference to our client’s operational conditions, and our expert controls the range of product specifications to gain their satisfaction and trust.
Weld Neck Flange products are very simple to remember at the long tapered hub, which goes gradually over to the wall thickness from a pipe or fitting. The long-tapered centre provides a vital reinforcement for usage in several applications that involve high pressure, sub-zero, or elevated temperatures. A smoother transition from these flange’s thicknesses to the affected pipes by the taper is a considerable benefit, under conditions of repeated bending, caused by line expansion or other forces. Weld Neck Flanges are bored to match or connect the inside diameter of the mating pipe or fitting, so there will be minimal or no restriction of product flow into the pipe. As a result, Weld Neck Flange help restricts turbulence at the joint and reduces erosion. These flange types are in demand because they provide outstanding stress distribution through the tapered hub and are readily radiographed for flaw detection.
Nextgen Steel & Alloys have a team of design engineers and manufacturers who produce various flange products with the best working features. Our quality professionals recommend using pure alloys as a raw material that is superior and gives additional strength. Thus reliable material is procured to give additional corrosion strength.
Weld Neck Flanges Dimensions
ANSI/ASME B16.5, B16.47 Series A & B, B16.48, BS4504, BS 10, EN-1092, DIN, etc.
Weld Neck Flanges Standard
ANSI Flanges, ASME Flanges, BS Flanges, DIN Flanges, EN Flanges, etc.
Weld Neck Flanges Size
1/2" (15 NB) to 48" (1200NB) DN10~DN5000
Weld Neck Flanges Class / Pressure
150#, 300#, 600#, 900#, 1500#, 2500#, PN6, PN10, PN16, PN25, PN40, PN64 etc.
Pressure Calculation in DIN
6Bar 10Bar 16Bar 25Bar 40Bar / PN6 PN10 PN16 PN25 PN40, PN64
Weld Neck Flange Face Type
Flate Face (FF), Raised Face (RF), Ring Type Joint (RTJ)
Stainless Steel Weld Neck Flanges :
ASTM A182, F304, 304L, 304H, 316, 316L, 316Ti, 310, 310S, 321, 321H, 317, 347, 347H, 904L, SMO 254
Duplex & Super Duplex Steel Weld Neck Flanges :
ASTM / ASME A/SA 182 F44, F45, F51, F53, F55, F60, F61 / Duplex 2205 – UNS S31803, UNS S32205 / Super Duplex 2507 – UNS S32750, UNS S32760
Carbon Steel Weld Neck Flanges :
ASTM/ ASME A105, ASTM/ ASME A350 LF2, ASTM A694 & ASME SA694 F42 / F46 / F52 / F56 / F60 / F65 / F70
Alloy Steel Weld Neck Flanges :
ASTM / ASME A182 F5 / F9 / F11 / F12 / F22 / F91
Inconel Weld Neck Flanges : ASTM B564, Inconel 600 – UNS No. N06600, Inconel 601 – UNS No. N06601, Inconel 625 -UNS No. N06625, Inconel 715, Inconel 718 – UNS No. N07718, Incoloy 800 / 800H /800HT – (UNS No. N08800 / N08810 / N08811), Incoloy 825 – UNS No. N08825, Incoloy 925 – UNS No. N09925
Hastelloy Weld Neck Flanges :
ASTM B/SB564, Hastelloy B2 – UNS No. N10665, Hastelloy B3 – UNS No. N010675, Hastelloy C4 – UNS No. N06455, Hastelloy C22 – UNS No. N06022, Hastelloy C276 – UNS No. N10276, Hastelloy C2000 – UNS No. N06200, Hastelloy X – UNS No. N06002
Nickel Weld Neck Flanges : Nickel 200 – UNS No. N02200 , Nickel 201 – UNS No. N02201
Monel Weld Neck Flanges :
ASME SB 564, Monel 400 – UNS No. N04400, Monel K500 – UNS No. N05500
Titanium Weld Neck Flanges :
ASTM B381 / ASME SB381, Grade 2 – UNS No. R50400, Grade 5 – UNS No. R56400
Alloy 20 Weld Neck Flanges :
ASTM B462 / ASME SB462 – UNS No. N08020
Welding Neck flange ANSI B16.5 150 lbs Dimensions
Size in Inch | Size in mm | Outer Diameter | Flange Thickness | 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 |
Weld Neck Flange Class 300 Dimensions
Size in Inch | Size in mm | Outer Diameter | Flange Thickness | 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 | 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 |
ASME B16.5 Weld Neck Flanges Class 400 Dimensions
Size in Inch | Size in mm | Outer Diameter | Flange Thickness | 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 | 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 | 255 | 35 | 146 | 114.3 | 89 | 157.2 | 7 | 200 | 1.6 | |
5 | 125 | 280 | 38.1 | 178 | 141.3 | 102 | 185.7 | 7 | 235 | 1.6 | |
6 | 150 | 320 | 41.3 | 206 | 168.3 | 103 | 215.9 | 7 | 269.9 | 1.6 | |
8 | 200 | 380 | 47.7 | 260 | 219.1 | 117 | 269.9 | 7 | 330 | 1.6 | |
10 | 250 | 445 | 54 | 321 | 273 | 124 | 323.8 | 7 | 387.4 | 1.6 | |
12 | 300 | 520 | 57.2 | 375 | 323.8 | 137 | 381 | 7 | 450.8 | 1.6 | |
14 | 350 | 585 | 60.4 | 425 | 355.6 | 149 | 412.8 | 7 | 514.4 | 1.6 | |
16 | 400 | 650 | 63.5 | 483 | 406.4 | 152 | 469.9 | 7 | 571.5 | 1.6 | |
18 | 450 | 710 | 66.7 | 533 | 457 | 165 | 533.4 | 7 | 628.6 | 1.6 | |
20 | 500 | 775 | 69.9 | 587 | 508 | 168 | 584.2 | 7 | 685.8 | 1.6 | |
24 | 600 | 915 | 76.2 | 702 | 610 | 175 | 692.2 | 7 | 812.8 | 1.6 |
Weld Neck Flange Class 600 Dimensions
Size in Inch | Size in mm | Outer Diameter | Flange Thickness | 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 | 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 |
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 |
1¼ | 3 | 3 | 3 | 3 | 3 | 3 |
1½ | 3 | 3 | 3 | 3 | 4 | 4 |
2 | 5 | 5 | 5 | 5 | 5 | 6 |
2½ | 8 | 8 | 8 | 8 | 7 | 10 |
3 | 9 | 9 | 9 | 9 | 9 | 11.5 |
3½ | 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 |
Suppliers of ASME B16.5 Weld Neck Flanges
Super Duplex Steel WNRF Flange Manufacturer
Hastelloy RFSO Flange
Alloy 20 Weld Neck Flange Supplier in India
High Nickel Alloy Weld Neck Flanges Supplier
ASTM A403 SS Weld Neck Flanges
Super Duplex Steel Weld Neck Flanges
Copper Nickel Weld Neck Flange Stockholder
WNRTJ Flanges Exporters
Weld Neck Flanges at Best Price
Titanium Weld Neck Flanges in India
Welding Neck Raised Face Flange In Mumbai
Austenitic Stainless Steel Weld Neck Flange
Class 300 Weld Neck Flanges Exporter
ANSI B16.5 Class 150 Weld Neck Flanges Stockist
ANSI B16.5 Inconel Raised Face Weld Neck Flange
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