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Asme/ansi B16.5 Weld Neck (Wn) Pipe Flanges stockist


High Quality Weld Neck Forged Flanges, ANSI B16.5 / ASME B16.47 Weld Neck Flanges, Raised Face Weld Neck Flange, ASME B16.5 / ANSI B16.47 Welding Neck Flange, We are offering competitive prices on DIN Weld Neck Flange


Carbon, Alloy, Stainless Steel Weld Neck Flanges, Series A & B WNRF Flanges, MSS Weld Neck Flange, Nickel Alloy 200 WN Flange, Carbon Steel Weld Neck Flange, Inconel Weld Neck Flange, Hastelloy Weld Neck Flange, Copper Nickel WNRF Flanges



Weld Neck Flanges stockist
Weld Neck Flanges

We have many years of experienced in the stockists of high quality ASME/ANSI/DIN standard weld neck flanges . We offer immediate delivery programs for standard size of carbon steel weld neck flanges and stainless steel weld neck flanges. We offer weld neck pipe flanges at our facility to companies in various industries including shipbuilding, power generation, petrochemical plants, oil refineries, waste water treatment plants, paper mills, pharmaceutical plants and turnkey projects among others.

Weld neck pipe flanges are connected to the pipe by welding the pipe to the neck of the pipe flange, which helps to pass on the stress from the weld neck to the pipe itself. This also reduces high stress concentration at the base of the hub of the weld neck pipe flanges. Weld neck pipe flanges are generally used in high pressure applications, where hot or cold temperatures exist. The inside diameter of a weld neck pipe flange is machined to match the inside diameter of the pipe.


What is Weld Neck Flange ?

weld neck flanges (also known as a high-hub flange and tapered hub flange) is a type of flange. There are two designs. The regular type is used with pipes. The long type is unsuitable for pipes and is used in process plant. A weld neck flange consists of a circular fitting with a protruding rim around the circumference. Generally machined from a forging, these flanges are typically butt welded to a pipe. The rim has a series of drilled holes that permit the flange to be affixed to another flange with bolts.


Weld Neck Flanges Specification


Welding Neck Flange, WN Forged Flanges, Weld Neck Flanges Production Range

Size 1/2″ (15 NB) to 48″ (1200NB)
Standards ANSI B16.5, ANSI B16.47 Series A & B, MSS SP44, ASA, API-605, AWWA, Custom Drawings
Pressure Ratings Class 150, Class 300, Class 400, Class 600, Class 900, Class1500, Class 2500 | PN6, PN10, PN16, PN25, PN40, PN64 etc.
Carbon Steel Weld Neck Flanges ASTM A105/A105N, A350 LF1, LF2 CL1/CL2, LF3 CL1/CL2, A694 F42, F46, F48, F50, F52, F56, F60, F65, F70, A516.60, 65, 70 (Spectacle Blind Flange, Spacer Ring/Spade Flange), Steel RST37.2, C22.8
Stainless Steel Weld Neck Flanges ASTM A182 F202, F304/304L/304H, F316/316L, F316H, F316TI, F310, F321, F904L
Alloy Steel Weld Neck Flanges ASTM A182 F1, F5, F9, F11, F22, F91
Special Alloy Weld Neck Flanges Duplex, Super Duplex, Nickel Alloys
Flange Face Type Flate Face (FF), Raised Face (RF), Ring Type Joint (RTJ)
Coating/Surface Treatment Anti-rust Paint, Oil Black Paint, Yellow Transparent, Zinc Plated, Cold and Hot Dip Galvanized
Value Added Services CNC Machining, Customised Flanges

Weld Neck Flange – Standards

ASME: ANSI B16.5, ANSI B16.47, ANSI B16.36, ANSI B16.48, BS 4504, EN1092, UNI 2277/2278, DIN, JIS, SABS1123, GOST-12820

DIN: DIN2527, DIN2566, DIN2573, DIN2576, DIN2641, DIN2642, DIN2655, DIN2656, DIN2627, DIN2628, DIN2629, DIN 2631, DIN2632, DIN2633, DIN2634, DIN2635, DIN2636,DIN2637, DIN2638, DIN2673

EN: EN10253-1, EN10253-2


Weld Neck Flange Materials Grades

Materials : Standard, Grades
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
6% Moly / Super Duplex Weld Neck Flanges : ASTM / ASME A/SA 182 F 44, F 45, F51, F 53, F 55, F 60, F 61
Low Temperature Steel Weld Neck Flanges : ASTM A350 LF2, LF3, LF6
High Yield Weld Neck Flanges : ASTM A694 F42, F52, F60, F65, F70
Nickel Alloys Weld Neck Flanges : ASTM SB564, SB160, SB472, SB162 – Nickel 200 (UNS No. N02200), Nickel 201 (UNS No. N02201), Monel 400 (UNS No. N04400), Monel 500 (UNS No. N05500), Inconel 800 (UNS No. N08800), Inconel 825 (UNS No. N08825), Inconel 600 (UNS No. N06600), Inconel 625 (UNS No. N06625), Inconel 601 (UNS No. N06601), Hastelloy C 276 (UNS No. N10276), Alloy 20 (UNS No. N08020)
Copper Alloys Weld Neck Flanges : ASTM SB 61 , SB62 , SB151 , SB152 – UNS No. C 70600 (Cu-Ni 90/10), C 71500 (Cu-Ni 70/30), UNS No. C 10100, 10200, 10300, 10800, 12000, 12200
Alloys Weld Neck Flanges : ALLOY 20, ALLOY C, ALLOY C276, ALLOY B2
Other Grade of Weld Neck Flanges : Bronze, Brass, Cupro Nickel, Titanium, Inconel, Monel, Hastelloy


ASME B16.5 Weld Neck Flange Dimensions


Weld Neck Flanges 150 Lbs 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

IMP. NOTES:
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. Blind Flanges may be made with the same hub as that used for Slip-on Flanges or without hub.
3. 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.
4. Depth of Socket (D) is covered by ANSI B 16.5 only in sizes through 3 inch, over 3 inch is at the Stockist’s option.
5. 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).
6. Welding Neck Flange Bore Size SCH10, SCH20, SCH30, STD, SCH40, SCH60, SCH80, SCH100, SCH 120, SCH140, SCH160, XS


ANSI, ASME, ASA B16.5 300lb/sq.in. WELDING NECK FLANGE RF
ø D b g m a J* h k Holes l Kg.
1/2″ 95,2 14,3 34,9 38,1 21,3 15,7 52,4 66,7 4 15,9 0,900
3/4″ 117,5 15,9 42,9 47,6 26,7 20,8 57,1 82,5 4 19,0 1,500
1″ 123,8 17,5 50,8 54,0 33,5 26,7 61,9 88,9 4 19,0 1,900
1 1/4″ 133,3 19,0 63,5 63,5 42,2 35,1 65,1 98,4 4 19,0 2,600
1 1/2″ 155,6 20,6 73,0 69,8 48,3 40,9 68,3 114,3 4 22,2 3,300
2″ 165,1 22,2 92,1 84,1 60,3 52,6 69,8 127,0 8 19,0 3,600
2 1/2″ 190,5 25,4 104,8 100,0 73,1 62,7 76,2 149,2 8 22,2 5,400
3″ 209,5 28,6 127,0 117,5 88,9 78,0 79,4 168,3 8 22,2 7,400
3 1/2″ 228,6 30,2 139,7 133,3 101,6 90,2 81,0 184,1 8 22,2 8,900
4″ 254,0 31,7 157,2 146,0 114,3 102,4 85,7 200,0 8 22,2 11,900
5″ 279,4 34,9 185,7 177,8 141,2 128,3 98,4 234,9 8 22,2 16,000
6″ 317,5 36,5 215,9 206,4 168,4 154,2 98,4 269,9 12 22,2 20,200
8″ 381,0 41,3 269,9 260,3 219,1 202,7 111,1 330,2 12 25,4 31,000
10″ 444,5 47,6 323,4 320,7 273,0 254,5 117,5 387,3 16 28,6 44,300
12″ 520,7 50,8 381,0 374,6 323,8 304,8 130,2 450,8 16 31,7 64,000
14″ 584,2 54,0 412,7 425,4 355,6 336,5 142,9 514,3 20 31,7 88,000
16″ 647,7 57,1 469,9 482,6 406,4 387,3 146,0 571,5 20 34,9 113,000
18″ 711,2 60,3 533,4 533,4 457,2 438,1 158,7 628,6 24 34,9 134,000
20″ 774,7 63,5 584,2 587,4 508,0 488,9 161,9 685,8 24 34,9 171,000
22″ 838,2 66,7 641,2 641,2 558,8 539,7 165,1 742,9 24 41,3 195,000
24″ 914,4 69,8 692,1 701,7 609,6 590,5 168,3 812,8 24 41,3 238,000
* The data “J” corresponds to the STD schedule

IMP. NOTES:
1. Class 300 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. Blind Flanges may be made with the same hub as that used for Slip-on Flanges or without hub.
3. 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.
4. Depth of Socket (D) is covered by ANSI B 16.5 only in sizes through 3 inch, over 3 inch is at the Stockist’s option.
5. 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).
6. Welding Neck Flange Bore Size SCH10, SCH20, SCH30, STD, SCH40, SCH60, SCH80, SCH100, SCH 120, SCH140, SCH160, X
S


ANSI/ASME/ASA B16.5 600lb/sq.in. WELDING NECK FLANGE RF
ø D b g m a J* h k Holes l Kg.
1/2″ 95,2 14,3 34,9 38,1 21,3 15,7 52,4 66,7 4 15,9 0,900
3/4″ 117,5 15,9 42,9 47,6 26,7 20,9 57,1 82,5 4 19,0 1,500
1″ 123,8 17,5 50,8 54,0 33,5 26,7 61,9 88,9 4 19,0 1,900
1 1/4″ 133,3 20,6 63,5 63,5 42,2 35,0 66,7 98,4 4 19,0 2,600
1 1/2″ 155,6 22,2 73,0 69,8 48,3 40,9 69,8 114,3 4 22,2 3,300
2″ 165,1 25,4 92,1 84,1 60,3 52,6 73,0 127,0 8 19,0 4,700
2 1/2″ 190,5 28,6 104,8 100,0 73,1 62,7 79,4 149,2 8 22,2 6,500
3″ 209,5 31,7 127,0 117,5 88,9 78,0 82,5 168,3 8 22,2 8,700
3 1/2″ 228,6 34,9 139,7 133,3 101,6 90,1 85,7 184,1 8 25,4 11,200
4″ 273,0 38,1 157,2 152,4 114,3 102,4 101,6 215,9 8 25,4 18,100
5″ 330,2 44,4 185,7 188,9 141,2 128,2 114,3 266,7 8 28,6 30,500
6″ 355,6 47,6 215,9 222,2 168,4 154,2 117,5 292,1 12 28,6 36,200
8″ 419,1 55,6 269,9 273,0 219,1 202,7 133,3 349,2 12 31,7 56,500
10″ 508,0 63,5 323,8 342,9 273,0 254,5 152,4 431,8 16 34,9 91,000
12″ 558,8 66,7 381,0 400,0 323,8 304,8 155,6 488,9 20 34,9 105,000
14″ 603,2 69,8 412,7 431,8 355,6 * 165,1 527,0 20 38,1 125,000
16″ 685,8 76,2 469,9 495,3 406,4 177,8 603,2 20 41,3 178,000
18″ 742,9 82,5 533,4 546,1 457,2 184,1 654,0 20 44,4 261,000
20″ 812,8 88,9 584,2 609,6 508,0 190,5 723,9 24 44,4 268,000
22″ 869,9 95,2 641,2 666,7 558,8 196,8 777,9 24 47,6 328,000
24″ 939,8 101,6 692,1 717,5 609,6 203,2 838,2 24 50,8 380,000
* The data “J” corresponds to the STD schedule
To be specifiedby customer

IMP. NOTES:
1. Class 600 flanges except Lap Joint will be furnished with 0.25 (6.35mm) raised face, which is not included in ‘Thickness’ (C) and ‘Length through Hub’ (Y1), (Y3).
2. Blind Flanges may be made with the same hub as that used for Slip-on Flanges or without hub.
3. 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.
4. Dimensions of sizes 1/2 through 3 1/2 are the same as for Class 400 Flanges.
5. 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).
6. Depth of Socket (D) is covered by ANSI B 16.5 only in sizes through 3 inch, over 3 inch is at the Stockist’s option.
7. Welding Neck Flange Bore Size SCH10, SCH20, SCH30, STD, SCH40, SCH60, SCH80, SCH100, SCH 120, SCH140, SCH160, XS



ASME B16.5 Weld Neck Flanges Dimensional Tolerances

Outside Diameter
≤ 24 = 1.6 mm | > 24 = ± 3.2 mm
Inside Diameter
≤ 10 = ± 0.8 mm | 12 thru 18 = 1.6 mm | ≥ 20 = + 3.2 mm / – 1.6 mm
Diameter of Contact Face
1.6 mm Raised Face = ± 0.8 mm
6.35 mm Raised Face, Tongue & Groove / Male-Female = ± 0.4 mm
Diameter of Hub at Base
≤ 24 = 1.6 mm | > 24 = ± 3.2 mm
Diameter of Hub at Point of Welding
≤ 5 = + 2.4 mm / – 0.8 mm | ≥ 6 = + 4.0 mm / – 0.8 mm
Drilling
Bolt Circle = 1.6 mm | Bolt Hole Spacing = ± 0.8 mm
Eccentricity of Bolt Circle with Respect to Facing
≤ 2½ = 0.8 mm max. | ≥ 3 = 1.6 mm max
Thickness
≤ 18 = + 3.2 mm / – 0 | ≥ 20 = + 4.8 mm / – 0
Length thru Hub
≤ 10 = 1.6 mm | ≥ 12 = ± 3.2 mm

Weld Neck Flanges - Marking & Packing

Products are packaged to ensure that there is no damage during transit. packaging is done in wooden cases. All Weld Neck Flanges are marked with Grade, Lot No, Size, Degree and our trade mark. On special requests we can also, make custom marking on our products.


Weld Neck Flanges - Value Added Services


  • Hot Dipped Galvanizing
  • Epoxy & FBE Coating
  • Electro Polish

Weld Neck Flanges - Quality Assurance

At Cromwell Distribution, all flanges are subject to strict inspection at each stage of the production process, from starting material purchasing to product dispatch. They are visually examined for conformity to ASTM, ASME, MSS, DIN, EN, and JIS codes and standards. Upon request, official certified Inspection Agencies can be called in to witness the material reports, dimensions and quality conformity of products.


Contact Cromwell Distribution for best offer of Weld Neck Flanges
Call: (361) 510-2964
Emailsales@cromwelldistribution.com