Welding Neck Flanges

ASME/ANSI B16.47 Series B weld neck flange

YANHAO Flanges manufactures ASME B16.47 Series B Class75 - Class900 Weld Neck Flanges available in various forms and sizes. We also offer custom-made Weld Neck Flanges.

  • class 75
  • class 150
  • class 300
  • class 400
  • class 600
  • class 900

ASME B16.47 Class 75 Series B Welding Neck Flanges

(A)All dimensions are in inches.

(B)These flanges will be furnished with a 1/16″ raised face unless otherwise specified. For more alternate flange facings, please click here!

(C)Standard Bore will be furnished unless otherwise specified. For more diameter of holes, please click here!

Nominal Pipe Size Outside Diameter (O) Bolt Circle (W) Raised Face Diameter (R) Number of Holes Diameter of Holes Bore (B) Top of Hub (A) Hub Diameter (X) Minimum Fillet Radius (r) Minimum Thickness (T) Length Thru Hub (Y) Approximate Weight (lbs)
26 30.00 28.50 27.75 36 0.75 Specified by purchaser 26.06 26.62 0.31 1.31 2.31 80
28 32.00 30.50 29.75 40 0.75 Specified by purchaser 28.06 28.62 0.31 1.31 2.44 85
30 34.00 32.50 31.75 44 0.75 Specified by purchaser 30.06 30.62 0.31 1.31 2.56 90
32 36.00 34.50 33.75 48 0.75 Specified by purchaser 32.06 32.62 0.31 1.38 2.75 105
34 38.00 36.50 35.75 52 0.75 Specified by purchaser 34.06 34.62 0.31 1.38 2.88 110
36 40.69 39.06 38.00 40 0.88 Specified by purchaser 36.06 36.81 0.38 1.44 3.38 145
38 42.69 41.06 40.00 40 0.88 Specified by purchaser 38.06 38.81 0.38 1.50 3.50 160
40 44.69 43.06 42.00 44 0.88 Specified by purchaser 40.06 40.81 0.38 1.50 3.62 170
42 46.69 45.06 44.00 48 0.88 Specified by purchaser 42.06 42.81 0.38 1.56 3.75 185
44 49.25 47.38 46.25 36 1.00 Specified by purchaser 44.06 44.88 0.38 1.69 4.12 230
46 51.25 49.38 48.25 40 1.00 Specified by purchaser 46.06 46.88 0.38 1.75 4.25 245
48 53.25 51.38 50.25 44 1.00 Specified by purchaser 48.06 48.88 0.38 1.81 4.38 270
50 55.25 53.38 52.25 44 1.00 Specified by purchaser 50.06 50.94 0.38 1.88 4.56 290
52 57.38 55.50 54.25 48 1.00 Specified by purchaser 52.06 52.94 0.38 1.88 4.75 310
54 59.38 57.50 56.25 48 1.00 Specified by purchaser 54.06 55.00 0.38 1.94 4.94 340
56 62.00 59.88 58.50 40 1.12 Specified by purchaser 56.06 57.12 0.44 2.00 5.31 400
58 64.00 61.88 60.50 44 1.12 Specified by purchaser 58.06 59.12 0.44 2.06 5.44 430
60 66.00 63.88 62.50 44 1.12 Specified by purchaser 60.06 61.12 0.44 2.19 5.69 475

ASME B16.47 Class 150 Series B Welding Neck Flanges

(A)All dimensions are in inches.

(B)These flanges will be furnished with a 1/16″ raised face unless otherwise specified. For more alternate flange facings, please click here!

(C)Standard Bore will be furnished unless otherwise specified. For more diameter of holes, please click here!

Nominal Pipe Size Outside Diameter (O) Bolt Circle (W) Raised Face Diameter (R) Number of Holes Diameter of Holes Bore (B) Top of Hub (A) Hub Diameter (X) Minimum Fillet Radius (r) Minimum Thickness (T) Length Thru Hub (Y) Approximate Weight (lbs)
26 30.94 29.31 28.00 36 0.88 Specified by purchaser 26.06 26.94 0.38 1.62 3.50 120
28 32.94 31.31 30.00 40 0.88 Specified by purchaser 28.06 28.94 0.38 1.75 3.75 140
30 34.94 33.31 32.00 44 0.88 Specified by purchaser 30.06 31.00 0.38 1.75 3.94 150
32 37.06 35.44 34.00 48 0.88 Specified by purchaser 32.06 33.06 0.38 1.81 4.25 170
34 39.56 37.69 36.25 40 1.00 Specified by purchaser 34.06 35.12 0.38 1.94 4.34 210
36 41.62 39.75 38.25 44 1.00 Specified by purchaser 36.06 37.19 0.38 2.06 4.62 240
38 44.25 42.12 40.25 40 1.12 Specified by purchaser 38.12 39.25 0.38 2.12 4.88 290
40 46.25 44.12 42.50 44 1.12 Specified by purchaser 40.12 41.31 0.38 2.19 5.06 310
42 48.25 46.12 44.50 48 1.12 Specified by purchaser 42.12 43.38 0.44 2.31 5.25 345
44 50.25 48.12 46.50 52 1.12 Specified by purchaser 44.12 45.38 0.44 2.38 5.38 370
46 52.81 50.56 48.62 40 1.25 Specified by purchaser 46.12 47.44 0.44 2.44 5.69 435
48 54.81 52.56 50.75 44 1.25 Specified by purchaser 48.12 49.50 0.44 2.56 5.88 480
50 56.81 54.56 52.75 48 1.25 Specified by purchaser 50.12 51.50 0.44 2.69 6.06 520
52 58.81 56.56 54.75 52 1.25 Specified by purchaser 52.12 53.56 0.44 2.75 6.19 550
54 61.00 58.75 56.75 56 1.25 Specified by purchaser 54.12 55.62 0.44 2.81 6.38 620
56 63.00 60.75 58.75 60 1.25 Specified by purchaser 56.12 57.69 0.56 2.88 6.56 650
58 65.94 63.44 60.75 48 1.38 Specified by purchaser 58.12 59.69 0.56 2.94 6.88 780
60 67.94 65.44 63.00 52 1.38 Specified by purchaser 60.12 61.81 0.56 3.00 7.06 850

ASME B16.47 Class 300 Series B Welding Neck Flanges

(A)All dimensions are in inches.

(B)These flanges will be furnished with a 1/16″ raised face unless otherwise specified.For more alternate flange facings, please click here!

(C)Standard Bore will be furnished unless otherwise specified.For more diameter of holes, please click here!

Nominal Pipe Size Outside Diameter (O) Bolt Circle (W) Raised Face Diameter (R) Number of Holes Diameter of Holes Bore (B) Top of Hub (A) Hub Diameter (X) Minimum Fillet Radius (r) Minimum Thickness (T) Length Thru Hub (Y) Approximate Weight (lbs)
26 34.12 31.62 29.00 32 1.38 Specified by purchaser 26.19 27.62 0.56 3.50 5.69 400
28 36.25 33.75 31.00 36 1.38 Specified by purchaser 28.19 29.75 0.56 3.50 5.88 450
30 39.00 36.25 33.25 36 1.50 Specified by purchaser 30.25 32.00 0.56 3.69 6.22 550
32 41.50 38.50 35.50 32 1.62 Specified by purchaser 32.25 34.00 0.62 4.06 6.62 685
34 43.62 40.62 37.50 36 1.62 Specified by purchaser 34.25 36.12 0.62 4.06 6.81 750
36 46.12 42.88 39.75 32 1.75 Specified by purchaser 36.25 38.00 0.62 4.06 7.12 840
38 48.12 44.88 41.75 36 1.75 Specified by purchaser 38.25 40.00 0.62 4.38 7.56 915
40 50.12 46.88 43.88 40 1.75 Specified by purchaser 40.25 42.00 0.62 4.56 7.81 990
42 52.50 49.00 46.00 36 1.88 Specified by purchaser 42.31 44.00 0.62 4.69 8.06 1135
44 54.50 51.00 48.00 40 1.88 Specified by purchaser 44.31 46.19 0.62 5.00 8.44 1235
46 57.50 53.75 50.00 36 2.00 Specified by purchaser 46.31 48.38 0.62 5.06 8.75 1470
48 59.50 55.75 52.25 40 2.00 Specified by purchaser 48.31 50.31 0.62 5.06 8.81 1575
50 61.50 57.75 54.25 44 2.00 Specified by purchaser 50.31 52.38 0.62 5.44 9.25 1710
52 63.50 59.75 56.25 48 2.00 Specified by purchaser 52.31 54.44 0.62 5.62 9.56 1840
54 65.88 62.12 58.25 48 2.00 Specified by purchaser 54.31 56.50 0.62 5.38 9.44 1980
56 69.50 65.00 60.50 36 2.38 Specified by purchaser 56.31 58.81 0.69 6.06 10.56 2595
58 71.94 67.44 62.75 40 2.38 Specified by purchaser 58.31 60.94 0.69 6.06 10.81 2770
60 73.94 69.44 65.00 40 2.38 Specified by purchaser 60.31 62.94 0.69 5.94 10.69 2870

ASME B16.47 Class 400 Series B Welding Neck Flanges

(a)All dimensions are in inches.

(b)These flanges will be furnished with a 1/4″ raised face unless otherwise specified. For more alternate flange facings, please click here!

Nominal Pipe Size Outside Diameter (O) Bolt Circle (W) Raised Face Diameter (R) Number of Holes Diameter of Holes Bore (B) Top of Hub (A) Hub Diameter (X) Minimum Fillet Radius (r) Minimum Thickness (T) Length Thru Hub (Y) Approximate Weight (lbs)
26 33.50 30.75 28.00 28 1.50 Specified by purchaser 26.00 27.12 0.44 3.50 5.88 360
28 36.00 33.00 30.00 24 1.62 Specified by purchaser 28.00 29.12 0.50 3.75 6.25 450
30 38.25 35.25 32.25 28 1.62 Specified by purchaser 30.00 31.25 0.50 4.00 6.69 530
32 40.75 37.50 34.38 28 1.75 Specified by purchaser 32.00 33.25 0.50 4.25 7.06 635
34 42.75 39.50 36.50 32 1.75 Specified by purchaser 34.00 35.38 0.56 4.38 7.38 690
36 45.50 42.00 38.62 28 1.88 Specified by purchaser 36.00 37.50 0.56 4.69 7.88 855
38 47.50 44.00 40.75 32 1.88 Specified by purchaser 38.00 39.50 0.56 4.88 8.12 935
40 50.00 46.25 43.00 32 2.00 Specified by purchaser 40.00 41.50 0.56 5.12 8.50 1090
42 52.00 48.25 45.00 32 2.00 Specified by purchaser 42.00 43.62 0.56 5.25 8.81 1190
44 54.50 50.50 47.25 32 2.12 Specified by purchaser 44.00 45.62 0.56 5.50 9.18 1375
46 56.75 52.75 49.50 36 2.12 Specified by purchaser 46.00 47.75 0.56 5.75 9.62 1525
48 59.50 55.25 51.50 28 2.38 Specified by purchaser 48.00 49.88 0.56 6.00 10.12 1790
50 61.75 57.50 53.62 32 2.38 Specified by purchaser 50.00 52.00 0.56 6.19 10.56 1950
52 63.75 59.50 55.62 32 2.38 Specified by purchaser 52.00 54.00 0.56 6.38 10.88 2125
54 67.00 62.25 57.88 28 2.62 Specified by purchaser 54.00 56.12 0.56 6.69 11.38 2565
56 69.00 64.25 60.12 32 2.62 Specified by purchaser 56.00 58.25 0.56 6.88 11.75 2710
58 71.00 66.25 62.12 32 2.62 Specified by purchaser 58.00 60.25 0.56 7.00 12.06 3230
60 74.25 69.00 64.38 32 2.88 Specified by purchaser 60.00 62.38 0.56 7.31 12.56 3820

ASME B16.47 Class 600 Series B Welding Neck Flanges

(a)All dimensions are in inches.

(b)These flanges will be furnished with a 1/4″ raised face unless otherwise specified. For more alternate flange facings, please click here!

Nominal Pipe Size Outside Diameter (O) Bolt Circle (W) Raised Face Diameter (R) Number of Holes Diameter of Holes Bore (B) Top of Hub (A) Hub Diameter (X) Minimum Fillet Radius (r) Minimum Thickness (T) Length Thru Hub (Y) Approximate Weight (lbs)
26 35.00 31.75 28.62 28 1.75 Specified by purchaser 26.00 27.50 0.50 4.38 7.12 550
28 37.50 34.00 30.88 28 1.88 Specified by purchaser 28.00 29.62 0.50 4.56 7.50 650
30 40.25 36.50 33.12 28 2.00 Specified by purchaser 30.00 31.75 0.50 4.94 8.06 810
32 42.75 38.75 35.25 28 2.12 Specified by purchaser 32.00 33.88 0.50 5.12 8.50 950
34 45.75 41.50 37.50 24 2.38 Specified by purchaser 34.00 36.00 0.56 5.56 9.19 1205
36 47.75 43.50 39.75 28 2.38 Specified by purchaser 36.00 38.12 0.56 5.75 9.56 1340
38 50.00 45.75 41.50 28 2.38 Specified by purchaser 38.00 40.25 0.56 6.00 10.00 1470
40 52.00 47.75 43.75 32 2.38 Specified by purchaser 40.00 42.25 0.56 6.25 10.38 1630
42 55.25 50.50 46.00 28 2.62 Specified by purchaser 42.00 44.38 0.56 6.62 11.00 2030
44 57.25 52.50 48.25 32 2.62 Specified by purchaser 44.00 46.50 0.56 6.81 11.38 2160
46 59.50 54.75 50.25 32 2.62 Specified by purchaser 46.00 48.62 0.56 7.06 11.81 2410
48 62.75 57.50 52.50 32 2.88 Specified by purchaser 48.00 50.75 0.56 7.44 12.44 2855
50 65.75 60.00 54.50 28 3.12 Specified by purchaser 50.00 52.88 0.56 7.75 12.94 3330
52 67.75 62.00 56.50 32 3.12 Specified by purchaser 52.00 54.88 0.56 8.00 13.25 3560
54 70.00 64.25 58.75 32 3.12 Specified by purchaser 54.00 57.00 0.56 8.25 13.75 3920
56 73.00 66.75 60.75 32 3.38 Specified by purchaser 56.00 59.12 0.62 8.56 14.25 4280
58 75.00 68.75 63.00 32 3.38 Specified by purchaser 58.00 61.12 0.62 8.75 14.56 4640
60 78.50 71.75 65.25 28 3.62 Specified by purchaser 60.00 63.38 0.69 9.19 15.31 5000

ASME B16.47 Class 900 Series B Welding Neck Flanges

(a)All dimensions are in inches.
(b)These flanges will be furnished with a 1/4″ raised face unless otherwise specified.For more alternate flange facings, please click here!

Nominal Pipe Size Outside Diameter (O) Bolt Circle (W) Raised Face Diameter (R) Number of Holes Diameter of Holes Bore (B) Top of Hub (A) Hub Diameter (X) Minimum Fillet Radius (r) Minimum Thickness (T) Length Thru Hub (Y) Approximate Weight (lbs)
26 40.25 35.50 30.00 20 2.62 Specified by purchaser 26.00 29.25 0.44 5.31 10.19 1050
28 43.50 38.25 32.25 20 2.88 Specified by purchaser 28.00 31.38 0.50 5.81 10.88 1520
30 46.50 40.75 34.50 20 3.12 Specified by purchaser 30.00 33.50 0.50 6.12 11.38 1820
32 48.75 43.00 36.50 20 3.12 Specified by purchaser 32.00 35.75 0.50 6.31 11.94 2065
34 51.75 45.50 39.00 20 3.38 Specified by purchaser 34.00 37.88 0.56 6.75 12.56 2450
36 53.00 47.25 40.50 24 3.12 Specified by purchaser 36.00 40.00 0.56 6.81 12.81 2520
38 57.50 50.75 43.25 20 3.62 Specified by purchaser 38.00 42.25 0.75 7.50 13.88 3385
40 59.50 52.75 45.75 24 3.62 Specified by purchaser 40.00 44.38 0.81 7.75 14.31 3620
42 61.50 54.75 47.75 24 3.62 Specified by purchaser 42.00 46.31 0.81 8.12 14.62 3960
44 64.88 57.62 50.00 24 3.88 Specified by purchaser 44.00 48.62 0.88 8.44 15.38 4300
46 68.25 60.50 52.50 24 4.12 Specified by purchaser 46.00 50.88 0.88 8.88 16.18 4640
48 70.25 62.50 54.50 24 4.12 Specified by purchaser 48.00 52.88 0.94 9.19 16.50 4980
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    Mengcun Hui Autonomous County, Cangzhou City, Hebei Province

    Phone: +8613313073735(same as WeChat)

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    Email: flanges.yh@gmail.com

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    China Hebei Yanhao Pipeline Equipment Co., Ltd. is a professional manufacturer of steel elbow flange pipe fittings.Our company undertakes the customization of various standard or non-standard models of flanges,elbows, tees, large and small heads, reducers, The company has multiple production lines that...