Manufacturer, Exporter & Supplier of Weld Neck Flanges, WNRF Flanges, Carbon Steel Weld Neck Flanges, SS Weld Neck Flanges

Weld Neck Flanges / WNRF Flanges

Weld Neck Flanges

We are Manufacturer, Supplier and Exporter of ASME 16.5 Weld Neck Flanges / WNRF Flanges. Weld Neck flanges or welding-neck flanges can be differentiated from all other types of flange by their long tapered hub. These flanges are bored to match the inside diameter of the mating pipe so there will be no restriction of product flow. The weld neck is therefore favoured in critical applications. Weld Neck Flanges are available in following specifications:

Size : 1/2"NB TO 60"NB
Class : 150 LBS, 300 LBS, 600 LBS, 900 LBS, 1500 LBS, 2500 LBS, DIN Standard ND-6,10, 16, 25, 40 Etc.
Material : Grade
In Form : SORF, WNRF, BLRF, SWRF, LAP Joint, Threaded, Reducing, Spectacle, etc
Standard : ANSI B16.5, ANSI B16.47, ANSI B16.36, ANSI B16.48, BS 4504, EN1092, UNI 2277/2278, DIN Flanges
Type of Flanges : Weld Neck Flanges - WNRF, Slip On Raise Face - SORF,Screwed (Threaded) Flanges, Long Weld Neck
    Flanges, Reducing.
Stainless Steel  Weld Neck Flanges : ASTM A 182, A 240 F 304, 304L, 304H, 316, 316L, 316Ti, 310, 310S, 321, 321H, 317, 347, 347H,904L
Carbon Steel  Weld Neck Flanges : ASTM / ASME A/SA 105 ASTM / ASME A 350 , ASTM A 181 LF 2 / A516 Gr.70 A36, A694 F42, F46,
    F52, F60, F65, F70
Alloy Steel  Weld Neck Flanges : ASTM / ASME A/SA 182 & A 387 F1, F5, F9, F11, F12, F22, F91
Duplex Steel  Weld Neck Flanges : ASTM / ASME A/SA 182 F 44, F 45, F51, F 53, F 55, F 60, F 61
Nickel Alloy Weld Neck Flanges : Monel 400 & 500, Inconel 600 & 625, Incolloy 800, 825, Hastelloy C22, C276, Copper Nickel,
    Hastelloy, Nickel, Monel, Inconel, Alloy20.
ANSI, ASME, ASA, B16.5 WELDING NECK FLANGE RF Dimensions
ANSI, ASME, ASA, B16.5 150lb/sq.in. WELDING NECK FLANGE RF
ø D b g m a J* h k Holes l Kg.
1/2" 88,9 11,1 34,9 30,2 21,3 15,7 47,6 60,3 4 15,9 0,500
3/4" 98,4 12,7 42,9 38,1 26,7 20,8 52,4 69,8 4 15,9 0,700
1" 107,9 14,3 50,8 49,2 33,5 26,7 55,6 79,4 4 15,9 1,100
1 1/4" 117,5 15,9 63,5 58,8 42,2 35,1 57,1 88,9 4 15,9 1,500
1 1/2" 127,0 17,5 73,0 65,1 48,3 40,9 61,9 98,4 4 15,9 1,800
2" 152,4 19,0 92,1 77,8 60,3 52,6 63,5 120,6 4 19,0 2,700
2 1/2" 177,8 22,2 104,8 90,5 73,1 62,7 69,8 139,7 4 19,0 4,400
3" 190,5 23,8 127,0 107,9 88,9 78,0 69,8 152,4 4 19,0 5,200
3 1/2" 215,9 23,8 139,7 122,2 101,6 90,2 71,4 177,8 8 19,0 6,400
4" 228,6 23,8 157,2 134,9 114,3 102,4 76,2 190,5 8 19,0 7,500
5" 254,0 23,8 185,7 163,5 141,2 128,3 88,9 215,9 8 22,2 9,200
6" 279,4 25,4 215,9 192,1 168,4 154,2 88,9 241,3 8 22,2 11,000
8" 342,9 28,6 269,9 246,1 219,1 202,7 101,6 298,4 8 22,2 18,300
10" 406,4 30,2 323,8 304,8 273,0 254,5 101,6 361,9 12 25,4 25,000
12" 482,6 31,7 381,0 365,1 323,8 304,8 114,3 431,8 12 25,4 39,000
14" 533,4 34,9 412,7 400,0 355,6 336,5 127,0 476,2 12 28,6 51,000
16" 596,9 36,5 469,9 457,2 406,4 387,3 127,0 539,7 16 28,6 60,000
18" 635,0 39,7 533,4 504,8 457,2 438,1 139,7 577,8 16 31,7 71,000
20" 698,5 42,9 584,2 558,8 508,0 488,9 144,5 635,0 20 31,7 88,000
22" 749,3 46,0 641,2 609,6 558,8 539,7 149,2 692,1 20 34,9 102,000
24" 812,8 47,6 692,1 663,6 609,6 590,5 152,4 749,3 20 34,9 119,000
* The data "J" corresponds to the STD schedule
Note :
1. Class 150 flanges except Lap Joint will be furnished with 0.06 (1.6mm) raised face, which is included in ‘Thickness’ (C) and ‘Length through Hub’ (Y1), (Y3).
2. For Slip-on, Threaded, Socket Welding and Lap Joint Flanges, the hubs can be shaped either vertical from base to top or tapered within the limits of 7 degrees.
3. Blind Flanges may be made with the same hub as that used for Slip-on Flanges or without hub.
4. The gasket surface and backside (bearing surface for bolting) are made parallel within 1 degree. To accomplish parallelism, spot facing is carried out according to MSS SP-9, without reducing thickness (C).
5. Depth of Socket (D) is covered by ANSI B 16.5 only in sizes through 3 inch, over 3 inch is at the manufacturer’s option.
6. Welding Neck Flange Bore Size SCH10, SCH20, SCH30, STD, SCH40, SCH60, SCH80, SCH100, SCH 120, SCH140, SCH160, XS
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