Forged Steel Flanges Archives | Quality Manufacturer of Industrial Pipe Fittings https://www.zzfittings.com/products/forged-steel-flanges/ Top Steel Pipe Fittings Manufacturer Fri, 17 Jun 2022 06:36:17 +0000 zh-Hans hourly 1 https://wordpress.org/?v=6.9.4 224578074 Weld Neck Flange https://www.zzfittings.com/product-details/weld-neck-flange/ Thu, 19 Nov 2020 12:38:30 +0000 https://www.zzfittings.com/?post_type=products&p=5465 Weld neck flange provides a long tapered hub for weldin […]

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Weld neck flange provides a long tapered hub for welding to pipes , it is used in high pressure systems and suitable for both cold and hot temperatures. Generally machined by forging method, these flanges are typically butt welded to the pipe,when you are going to buy weld neck flange, it is important to specify the pipe thickness schedule.  Because the flange inside diameter will match the inside diameter of pipe. The rim has a series of drilled holes that permit the flange to be affixed to another flange with bolts.

Forged Steel Flange Standard

  •  ASME B16.5
  • ASME B16.47A
  • ASME B16.47B
  • JIS B2220
  • KS B1503
  • DIN 2573
  • DIN 2527
  • DIN 2631
  • BS 4504
  • API 6A

Pressure Rating for Weld Neck Flange

ANSI FLANGES

Class 150, 300, 600, 900, 1500, 2500

JIS FLANGES

5K, 10K, 16K, 20K, 30K

DIN FLANGES

PN6, PN10, PN16, PN25, PN40, PN64, PN100

API FLANGES

2000PSI, 3000PSI, 5000PSI, 10000PSI, 15000PSI, 20000PSI

Material for Steel Pipe Flange

Stainless Steel Flange
ASTM/ASME A/SA182 F304, F304L, F316, F316L, F321, F904L, F310S,DIN 1.4301, DIN 1.4306, DIN 1.4401, DIN 1.4404, DIN 1.4308, DIN 1.4408, DIN 1.4306, DIN 1.4409

Carbon Steel Flange

ASTM/ASME A/SA105 A/SA105N, DIN 1.0402, DIN 1.0460, DIN 1.0619,ASTM A350 LF2 / LF3, ASTM A694 / A694 F52 / F56 / F60 / F65 / F70 / F80

Alloy Steel Flange

ASTM A182 / ASME SA182 F5, F9, F11, F12, F22, F91

Nickel Weld Neck Flange

ASTM B564 / ASME SB564, Nickel 200, Nickel 201, Nickel 205, Nickel 205

Hastelloy Flange

ASTM B564 / ASME SB564, Hastelloy C276 (UNS N10276), C22 (UNS N06022), C4, C2000, B2, B3

Duplex Steel Flange

S31803 / S32205 / S32750 / S32760 ASTM A182 F51 / F52 / F53 / F54 / F55 / F57 / F59 / F60 / F61

Aluminium Flange

5052 /6061/ 6063 / 2017 / 7075

Weld Neck Flange Advantages

  1. Durable connection.
  2. Leakage prevention.
  3. Ease of installation.
  4. Testing of the pipe and joints are easier.
  5. The flange face is kept away from heat affected area.
  6. Suitable for high pressure and high heat applications.
  7. Facilitates easy access for radiography testing to check the integrity of welding.
  8. The weld connection does not interfere with flow of the fluid and reduces turbulence.

ASME B16.5 Weld Neck Flanges Dimensions

ASME B16.5 standard weld neck flanges are availbale in 1/2 ” to 24” nominal sizes and in pressure of Class 150#, 300#, 600#, 900#, 1500#, and 2500# . There are many seal facing as Raised Face (RF), Flat Face (FF), Ring Type Joint (RTJ) , Tongue-and-Groove (T&G) and Male-and-Female (M&F).

ASME B16.5 Weld Neck Flange Drawing

ASME B16.5 Weld Neck Flange Drawing

Weld Neck Flanges Class 150 LBS Dimensions
NPS A B1 Holes T1 D X A G Weight
1/2″ 89 15.7 4 11.2 47.8 30.2 21.3 35.1 0.5
3/4″ 99 20.8 4 12.7 52.3 38.1 26.7 42.9 0.9
1″ 108 26.7 4 14.2 55.6 49.3 33.5 50.8 1.1
1-1/4″ 117 35.1 4 15.7 57.2 58.7 42.2 63.5 1.4
1-1/2″ 127 40.9 4 17.5 62 65 48.3 73.2 1.8
2″ 152 52.6 4 19.1 63.5 77.7 60.5 91.9 2.8
2-1/2″ 178 62.7 4 22.4 69.9 90.4 73.2 104.6 4.3
3″ 191 78 4 23.9 69.9 108 88.9 127 5.2
3-1/2″ 216 90.2 8 23.9 71.4 122.2 101.6 139.7 5.5
4″ 229 102.4 8 23.9 76.2 134.9 114.3 157.2 7.3
5″ 254 128.3 8 23.9 88.9 163.6 141.2 185.7 8.9
6″ 279 154.2 8 25.4 88.9 192 168.4 215.9 11.3
8″ 343 202.7 8 28.4 101.6 246.1 219.2 269.7 18.1
10″ 406 254.5 12 30.2 101.6 304.8 273.1 323.9 25.0
12?” 483 304.8 12 31.8 114.3 365.3 323.9 381 39.0
14″ 533 336.6 12 35.1 127 400.1 355.6 412.8 51.7
16″ 597 387.4 16 36.6 127 457.2 406.4 469.9 64.5
18″ 635 438.2 16 39.6 139.7 505 457.2 533.4 75.0
20″ 699 489.0 20 42.9 144.5 558.8 508 584.2 89.5
24″ 813 590.6 20 47.8 152.4 663.4 609.6 692.2 120
Weld Neck Flanges Class 300 LBS Dimensions
NPS A B1 Holes T1 D X A G Weight
1/2″ 95 15.7 4 14.2 52.3 38.1 21.3 35.1 0.8
3/4″ 117 20.8 4 15.7 57.2 47.8 26.7 42.9 1.4
1″ 124 26.7 4 17.5 62 53.8 33.5 50.8 1.6
1-1/4″ 133 35.1 4 19.1 65 63.5 42.2 63.5 2.1
1-1/2″ 155 40.9 4 20.6 68.3 69.9 48.3 73.2 3.1
2″ 165 52.6 8 22.1 69.9 84.1 60.5 91.9 3.5
2-1/2″ 191 62.7 8 25.4 76.2 100.1 73.2 104.6 5.3
3″ 210 78 8 28.4 79.2 117.3 88.9 127 7.3
3-1/2″ 229 90.2 8 30.2 81 133.4 101.6 139.7 8.2
4″ 254 102.4 8 31.8 85.9 146.1 114.3 157.2 11.3
5″ 279 128.3 8 35.1 98.6 177.8 141.2 185.7 15.1
6″ 318 154.2 12 36.6 98.6 206.2 168.4 215.9 20.0
8″ 381 202.7 12 41.1 1 260.4 219.2 269.7 30.5
11.3
10″ 445 254.5 16 47.8 117.3 320.5 273.1 323.9 4.8
12″ 521 303.2 16 50.8 130 374.7 323.9 381 64.5
14″ 584 333.3 20 53.8 142.7 425.5 355.6 412.8 88.3
16″ 648 381 20 57.2 146.1 482.6 406.4 469.9 115.0
18″ 711 428.7 24 60.5 158.8 533.4 457.2 533.4 143.0
20″ 775 477.8 24 63.5 162.1 587.2 508 584.2 175.0
24″ 914 575 24 69.9 168.1 701.5 609.6 692.2 260.0
Weld Neck Flanges Class 600 LBS Dimensions
NPS A B1 Holes T1 D X A G Weight
1/2″ 95 15.7 4 14.2 52.3 38.1 21.3 35.1 1.0
3/4″ 117 20.8 4 15.7 57.2 47.8 26.7 42.9 1.6
1″ 124 26.7 4 17.5 62 53.8 33.5 50.8 2.2
1-1/4″ 133 35.1 4 20.6 66.5 63.5 42.2 63.5 2.8
1-1/2″ 155 40.9 4 22.4 69.9 69.9 48.3 73.2 3.8
2″ 165 52.6 8 25.4 73.2 84.1 60.5 91.9 4.5
2-1/2″ 191 62.7 8 28.4 79.2 100.1 73.2 104.6 8.2
3″ 210 78 8 31.8 82.6 117.3 88.9 127 8.8
3-1/2″ 229 90.2 8 35.1 85.9 133.4 101.6 139.7 12.0
4″ 273 102.4 8 38.1 101.6 152.4 114.3 157.2 17.0
5″ 330 128.3 8 44.5 114.3 189 141.2 185.7 31.0
6″ 356 154.2 12 47.8 117.3 222.3 168.4 215.9 37.0
8″ 419 202.7 12 55.6 133.4 273.1 219.2 269.7 55.0
10″ 508 254.5 16 63.5 152.4 342.9 273.1 323.9 90.0
12″ 559 303.2 20 66.5 155.4 400.1 323.9 381 110.0
14″ 603 333.3 20 69.9 165.1 431.8 355.6 412.8 127.0
16″ 686 381 20 76.2 177.8 495.3 406.4 469.9 177.1
18″ 743 428.4 20 82.6 184.2 546.1 457.2 533.4 215.65
20″ 813 477.8 24 88.9 190.5 609.6 508 584.2 267.9
24″ 940 575 24 101.6 203.2 717.6 609.6 692.2 372.0
Weld Neck Flanges Class 900 LBS Dimensions
NPS A B1 Holes T1 D X A G Weight
1/2″ 121 15.7 4 22.4 60.5 38.1 21.3 34.9 1.9
3/4″ 130 20.8 4 25.4 69.9 44.5 26.7 42.9 2.6
1″ 149 26.7 4 28.4 73.2 52.3 33.5 50.8 3.8
1-1/4″ 159 35.1 4 28.4 73.2 63.5 42.2 63.5 4.3
1-1/2″ 178 40.9 4 31.8 82.6 69.9 48.3 73 6.0
2″ 216 52.6 8 38.1 101.6 104.6 60.5 92.1 10.8
2-1/2″ 244 62.7 8 41.1 104.6 124 73.2 104.8 15.0
3″ 241 78 8 38.1 101.6 127 88.9 127 13.7
4″ 292 102.4 8 44.5 114.3 158.8 114.3 157.2 22.5
5″ 349 128.3 8 50.8 127 190.5 141.2 185.7 37.4
6″ 381 154.2 12 55.6 139.7 235 168.4 215.9 47.7
8″ 470 202.7 12 63.5 162.1 298.5 219.2 269.9 81.3
10″ 546 254.5 16 69.9 184.2 368.3 273.1 323.8 119.0
12″ 610 304.8 20 79.2 200.2 419.1 323.9 381 157.0
14″ 641 336.6 20 85.9 212.9 450.9 355.6 412.8 180.0
16″ 705 387.1 20 88.9 215.9 508 406.4 469.9 217.0
18″ 787 438.2 20 101.6 228.6 565.2 457.2 533.4 292.0
20″ 857 489 20 108 247.7 622.3 508 584.2 362.0
24″ 1041 590.6 20 139.7 292.1 749.3 609.6 692.2 665.0
Weld Neck Flanges Class 1500 LBS Dimensions
NPS A B1 Holes T1 D X A G Weight
1/2″ 121 15.7 4 22.4 60.5 38.1 21.3 34.9 1.9
3/4″ 130 20.8 4 25.4 69.9 44.5 26.7 42.9 2.6
1″ 149 26.7 4 28.4 73.2 52.3 33.5 50.8 3.8
1-1/4″ 159 35.1 4 28.4 73.2 63.5 42.2 63.5 4.3
1-1/2″ 178 40.9 4 31.3 82.6 69.9 48.3 73 6.0
2″ 216 52.6 8 38.1 101.6 104.6 60.5 92.1 10.8
2-1/2″ 244 62.7 8 41.1 104.6 124 73.2 104.3 150.0
3″ 267 78 8 47.3 117.3 133.4 88.9 127 20.0
4″ 311 102.4 8 53.8 124 162.1 114.3 157.2 30.0
5″ 375 128.3 8 73.2 155.4 196.9 141.2 185.7 55.5
6″ 394 154.2 12 82.6 171.5 228.6 168.4 215.9 68.5
8″ 483 202.7 12 91.9 212.9 292.1 219.2 269.9 117.0
10″ 584 254.5 12 108 254 368.3 273.1 323.8 194.0
12″ 673 304.8 16 124 282.4 450.9 323.9 381 288.0
14″ 749 336.6 16 133.4 298.5 495.3 355.6 412.8 380.0
16″ 826 387.1 16 146.1 311.2 552.5 406.4 469.9 485.0
18″ 914 438.2 16 162.1 327.2 596.9 457.2 533.4 644.0
20″ 984 489 16 177.8 355.6 641.4 508 584.2 775.0
24″ 1168 590.6 16 203.2 406.4 762 609.6 692.2 1232.0
Weld Neck Flanges Class 2500 LBS Dimensions
NPS A B1 Holes T1 D X A G Weight
1/2″ 121 15.7 4 22.4 60.5 38.1 21.3 34.9 3.1
3/4″ 130 20.8 4 25.4 69.9 44.5 26.7 42.9 3.7
1″ 149 26.7 4 28.4 73.2 52.3 33.5 50.8 5.3
1-1/4″ 159 35.1 4 28.4 73.2 63.5 42.2 63.5 7.8
1-1/2″ 178 40.9 4 31.3 82.6 69.9 48.3 73 10.9
2″ 216 52.6 8 38.1 101.6 104.6 60.5 92.1 16.2
2-1/2″ 244 62.7 8 41.1 104.6 124 73.2 104.3 23.7
3″ 267 78 8 47.3 117.3 133.4 88.9 127 36.2
4″ 311 102.4 8 53.8 124 162.1 114.3 157.2 55.3
5″ 375 128.3 8 73.2 155.4 196.9 141.2 185.7 92.5
6″ 394 154.2 12 82.6 171.5 228.6 168.4 215.9 143.0
8″ 483 202.7 12 91.9 212.9 292.1 219.2 269.9 215.0
10″ 584 254.5 12 108 254 368.3 273.1 323.8 406.0
12″ 673 304.8 16 124 282.4 450.9 323.9 381 572.0

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