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Type of Flanges
Class & Size Range
Weld Neck Flanges
Slip On Flanges
Socket Weld Flanges
Lap Joint Flanges
Blind Flanges
Threaded Flanges
ASME B 16.47 A
ASME B16.47 B
WN Flange Bore
Figure 8 Blanks
Ring Joint Facing
AWWA Steel Ring
AWWA Steel hub
Approx Weight
Gaskets
Bolts & Nuts
PL Flanges (EN1092.1)
WN Flanges (EN1092.1)
SO Flanges (EN1092.1)
Th Flanges (EN1092.1)
BL Flanges (EN1092.1)
Backing Rings

Approx Weight 

Class150 
    DN     NPS         SO       WN          LWN       SW        Th        LF       BL
15 1/2 0.41 0.50 1.3 0.42 0.42 0.47 0.43
20 3/4 0.59 0.74 1.94 0.60 0.61 0.66 0.64
25 1 0.82 1.06 3.04 0.83 0.84 0.89 0.90
32 1 1/4 0.99 1.31 3.96 1.02 1.02 1.06 1.13
40 1 1/2 1.29 1.69 4.62 1.32 1.33 1.35 1.50
50 2 2.02 2.55 6.43 2.07 2.08 2.08 2.38
65 2 1/2 3.42 4.26 8.25 3.52 3.54 3.56 4.09
80 3 3.89 4.98 11.22 4.02 4.05 3.96 4.96
100 4 5.46 7.13 15.67 -- 5.70 5.55 7.18
125 5 6.24 8.93 25.01 -- 6.61 6.38 8.83
150 6 7.6 10.8 30.35 -- 8.14 7.69 11.6
200 8 12.5 18.1 45.48 -- 13.2 12.6 20.1
250 10 16.4 24.1 63.79 -- 17.7 16.5 28.8
300 12 26.8 37.7 94.79 -- 28.4 27.1 44.1
350 14 35.2 49.7 115.42 -- 37.5 39.7 59
400 16 44.6 60.6 147.89 -- 47.6 50.9 76.2
450 18 49.2 69.5 165.11 -- 53 56.8 94.4
500 20 62.6 86.6 201.22 -- 67.3 71.8 123.8
600 24 88.2 118.4 261.37 -- 95.4 99.8 187.7
Class300
DN NPS  SO WN LWN SW Th LF BL
15  1/2 0.65 0.75 2.21 0.67 0.65 0.71 0.64
20  3/4 1.08 1.24 3.47 1.11 1.09 1.12 1.06
25 1 1.39 1.64 4.2 1.43 1.41 1.47 1.42
32 1 1/4 1.74 2.13 5.44 1.80 1.77 1.83 1.86
40 1 1/2 2.50 2.94 6.57 2.58 2.54 2.60 2.67
50 2 2.91 3.47 8.4 3.02 2.97 2.94 3.21
65 2 1/2 4.37 5.28 11.25 4.57 4.48 4.33 4.88
80 3 5.91 7.11 15.28 6.20 6.06 5.88 6.9
100 4 9.80 11.6 22.99 -- 10.0 9.71 11.7
125 5 12.3 15.5 38.04 -- 12.8 12.2 15.8
150 6 16.1 19.9 46.85 -- 16.7 15.8 21.4
200 8 24.0 30.1 66.37 -- 24.8 23.5 34.3
250 10 34.3 43.6 94.23 -- 35.7 36.3 53.8
300 12 49.7 62.7 125.16 -- 51.5 53.8 79.0
350 14 70.0 87.7 175.2 -- 72.5 74.5 106.1
400 16 89.5 109.8 221.1 -- 92.7 96.3 139.2
450 18 108.0 133.4 256.89 -- 111.9 114.8 175.6
500 20 134.8 162.2 307.16 -- 139.6 142.5 222.6
600 24 201.9 235.4 431.02 -- 209.4 209.3 340.6
Class600
DN NPS  SO WN LWN SW LF BL
15  1/2 0.74 0.86 2.3 0.74 0.71 0.76
20  3/4 1.21 1.39 3.61 1.21 1.17 1.23
25 1 1.57 1.83 4.37 1.57 1.50 1.64
32 1 1/4 2.11 2.52 5.77 2.12 1.95 2.32
40 1 1/2 2.97 3.46 7.02 2.98 2.83 3.27
50 2 3.65 4.28 9.08 3.65 3.41 4.18
65 2 1/2 5.29 6.30 12.09 5.36 4.99 6.16
80 3 7.11 8.44 16.37 7.22 6.68 8.58
100 4 14.8 17.3 29.56 　 14.2 17.6
125 5 24.4 28.7 55.35 　 23.7 29.5
150 6 28.7 33.6 67.99   27.8 36.1
200 8 43.7 52.0 93.81   42.4 59.4
250 10 71.3 85.6 147.31 　 75.9 98.7
300 12 84.9 102.3 181.2 　 90.7 125.2
350 14 99.4 121.0 216.24   108.7 152.0
400 16 141.1 167.5 277.88   154.2 213.4
450 18 174.6 202.8 327.61 　 189.2 274.3
500 20 222.1 253.3 409.24 　 242.7 352.2
600 24 313.3 354.9 541.81   345.7 535.1
Class900
DN NPS  SO WN LWN SW BL
15  1/2 1.74 1.88 3.23 -- 1.70
20  3/4 2.34 2.58 4.18 -- 2.29
25 1 3.46 3.78 5.84 -- 3.39
32 1 1/4 3.98 4.42 7.44 -- 3.87
40 1 1/2 5.52 6.17 9.32 -- 5.38
50 2 9.74 10.9 18.87 -- 9.49
65 2 1/2 13.8 15.3 25.21 -- 14.0
80 3 11.5 13.7 23.04 -- 13.1
100 4 19.5 22.6 35.27 -- 26.9
125 5 32.1 37 61.73 -- 36.5
150 6 41.0 48.3 85.73 -- 47.4
200 8 70.6 80.4 134.5 -- 82.5
250 10 99.8 120.5 200.33 -- 122
300 12 132.5 160.9 238.88 -- 173
350 14 151.9 186.9 264.47 -- 206
400 16 184.5 235.1 322.12 -- 259
450 18 255.9 319.3 409.98 -- 367
500 20 313.5 389.3 491.86 -- 463
600 24 602.7 721.3 802.8 -- 876
Class1500
DN NPS  SO WN LWN SW BL
15  1/2 1.74 1.87 3.23 1.76 1.77
20  3/4 2.34 2.58 4.18 2.37 2.42
25 1 3.46 3.78 5.84 3.53 3.60
32 1 1/4 3.98 4.42 7.44 4.06 4.21
40 1 1/2 5.52 6.17 9.32 5.62 5.92
50 2 9.74 11.0 18.87 9.96 9.95
65 2 1/2 13.8 15.3 25.21 14.2 14.1
80 3 -- 19.9 29.61 -- 18.9
100 4 -- 30.2 42.64 -- 29.8
125 5 -- 57.8 82.4 -- 58.5
150 6 -- 69.5 97.78 -- 72.2
200 8 -- 119.6 154.49 -- 122.9
250 10 -- 207.5 249.29 -- 211.6
300 12 -- 312.9 364.74 -- 317.3
350 14 -- 413.6 464.68 -- 422.6
400 16 -- 528.3 571.3 -- 577.9
450 18 -- 675.1 717.05 -- 763.3
500 20 -- 860.8 846.57 -- 968.8
600 24 -- 1376.7 1278.12 -- 1562.3
Class2500 
DN NPS WN LWN BL
15   1/2 3.27 4.97 3.09
20  3/4 3.82 6.02 3.54
25 1 5.44 7.82 5.05
32 1 1/4 7.98 11.78 7.42
40 1 1/2 11.4 15.11 10.6
50 2 16.8 21.27 15.6
65 2 1/2 24.2 29.39 22.4
80 3 37.6 43.35 34.9
100 4 56.8 63.86 53.6
125 5 96.3 113.47 91.2
150 6 149.5 162.85 142.5
200 8 224.4 232.79 211.6
250 10 436.8 405.23 413.5
300 12 622.9 551.44 589.6
ASME B16.47 Series A
    DN    NPS           Class150         Class300        Class600        Class900
        WN          BL      WN       BL      WN        BL      WN       BL
650 26 142.4 306.1 270.5 458.3 423.0 65.0 673.8 1083.0
700 28 161.4 361.9 329.0 565.3 479.7 90.3 798.5 1343.1
750 30 190.8 430.9 376.2 658.2 541.8 1061.2 913.3 1594.4
800 32 238.2 537.3 436.8 769.2 609.6 1244.7 1098.9 1924.5
850 34 254.4 599.9 488.7 889.0 667.3 1416.2 1281.9 2283.6
900 36 304.8 733.7 546.0 1039.7 755.1 1646.7 1457.0 2639.0
950 38 336.8 799.1 304.8 875.8 640.0 1493.0 1423.9 2664.2
1000 40 364.9 894.5 370.3 1040.8 686.4 1678.5 1504.2 2925.4
1050 42 415.9 1044.9 403.1 1176.6 854.6 2013.2 1635.5 3251.2
1100 44 437.8 1195.9 459.2 1346.2 904.1 2228.1 1919.3 3794.5
1150 46 498.6 1304.7 522.6 1529.8 997.7 2517.6 2243.2 4403.5
1200 48 548.0 1470.0 556.3 1697.3 1196.0 2934.7 2405.5 4380.9
1250 50 593.4 1621.6 635.4 1937.8 1511.9 3357.7 - -
1300 52 652.1 1815.7 681.6 2141.7 1616.3 3653.8 - -
1350 54 726.2 2038.5 834.0 2496.4 1779.7 4077.0 - -
1400 56 798.2 2243.2 878.0 2681.2 1943.2 4557.7 - -
1450 58 882.8 2497.1 919.9 2921.1 2106.6 4958.6 - -
1500 60 926.0 2700.7 977.5 3189.7 2270 5724.0 - -

ASME B16.47 Series B
   DN     NPS          Class150        Class300      Class600        Class900
     WN       BL      WN      BL     WN      BL       WN       BL
650 26 58.08 165.0 188.0 388.8 246.9 529.2 525.9 927.6
700 28 66.81 200.4 197.1 440.0 284.0 625.3 665.0 1174.3
750 30 72.25 239.7 241.6 535.8 354.5 788.1 784.7 1409.4
800 32 83.71 287.7 299.7 673.5 412.9 945.8 889.3 1657.2
850 34 102.0 378.7 323.0 745.1 521.9 1158.7 1047.7 1943.5
900 36 114.7 395.1 357.7 831.3 570.5 1323.7 1060.5 2109.0
950 38 139.5 484.7 384.5 972.5 - - - -
1000 40 151.0 555.5 439.8 1106.3 - - - -
1050 42 166.1 618.3 490.0 1247.8 - - - -
1100 44 177.0 701.2 539.6 1431.3 - - - -
1150 46 207.4 809.6 632.6 1635.7 - - - -
1200 48 224.9 908.2 650.2 1811.4 - - - -
1250 50 247.6 1021.5 714.4 1999.5 - - - -
1300 52 262.3 1136.3 774.0 2208.5 - - - -
1350 54 284.8 1266.2 802.8 2468.2 - - - -
1400 56 301.5 1398.6 1071.8 2889.7 - - - -
1450 58 360.7 1587.7 1138.4 3182.7 - - - -
1500 60 382.2 1744.3 1210.1 3484.7 - - - -


Orifice flange    (Weld Neck)  HG-20615-2009
DN NPS  Class150 Class300 Class600 Class900 Class1500 Class2500
25 1 2.67 3.56 3.42 4.98 4.98 6.32
40 1 1/2 3.46 5.38 5.43 7.41 7.41 12.71
50 2 4.90 5.78 6.06 10.90 10.90 19.07
65 2 1/2 7.16 7.63 7.74 16.34 16.34 23.61
80 3 7.76 9.18 9.18 13.17 21.79 42.68
100 4 11.02 14.04 16.80 23.15 31.33 66.28
150 6 15.78 21.15 33.14 49.94 74.46 171.61
200 8 23.45 31.33 50.85 84.90 123.94 261.5
250 10 29.01 45.40 85.81 121.67 206.12 484.87
300 12 45.28 64.47 102.60 168.89 313.26 730.03
350 14 54.97 93.52 157.54 255.15 406.50 　
400 16 66.35 113.05 218.37 310.99 525.00 　
450 18 74.90 138.92 251.97 19.50 687.20  
500 20 89.44 167.53 313.26 528.46 852.60  
600 24 121.67 235.63 443.56 956.58 1366.80 　
  Orifice Flange  (Weld Neck) HG20592-2009 
DN
PN10 PN16 PN25 PN40 PN63 PN100 PN160
25 2.33 2.33 2.33 2.33 3.9 3.9 4.4
32 3.93 3.93 3.93 3.93 4.6 4.6 5.18
40 4.19 4.19 4.19 4.19 5.7 5.7 5.9
50 5.13 5.13 5.35 5.35 6.3 7.7 7.9
65 6 6 6.4 6.4 7.7 9.12 10.3
80 7.07 7.07 7.35 7.35 8.43 10.3 11
100 7.88 7.88 9.5 9.5 11.4 13 15.6
125 10.2 10.2 11.24 11.24 15.8 21 25
150 12.11 12.11 14.65 14.65 22.4 28 35.5
200 16.9 16.9 20.35 22.9 34 50 61.5
250 20.8 23.2 27.5 34 48 81 98.5
300 24.27 27.83 34.2 47.5 67.5 118 142
350 32.62 37.9 48 69 97.5 167 -
400 38.9 45.1 63 98 129 - -
450 42.63 54.5 75.5 105.1 - - -
500 49.65 74 96.5 130.5 - - -
600 68.1 116.5 138.6 211.5 -
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Genuine knowledge comes from practice - Karl Marx
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