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F304 1/2" NPT Flange (Th/TR) Stainless Steel 150-2500# ASME B16.5

Thread Type:
NPT
Pressure Ratings:
150 lbs
300 lbs
400lbs
600 lbs
900 lbs
1500 lbs
2500 lbs
NPS:
1/2 "
3/4"
1"
1-1/4"
1-1/2"
2"
2-1/2 "
3"
3-1/2"
4"
5"
6"
8"
10"
12"
14"
16"
18"
20"
24"
Material：:
304
304L
316
316L
Custom
Quantity:
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ASME B16.5 Threaded Flange (Th/TR)
Standard: ASME B16.5
Threads Standard: ASME B1.20.1,
Material Standard: ASME A182
Manufacturing Facility Standard: ISO 9001:2015 , GB/T19001-2016
Certification: Material Test Reports (MTRS) and Certificates of Conformity (COC) are available upon request.
npt flange

Dimensions & Sizes

PipeFlange DataHubRaised FaceDrilling DataWeight
NominalPipe SizeOutside DiameterOverall DiameterFlangeThickness minOverall LengthThreaded lengthminHub DiameterFace DiameterNumber of HolesBolt Hole DiameterDiameter of Circle of Holeskg/piece
ininininininininin
mmmmmmmmmmmmmmmmmm
1/20.840 21.303.500 88.900.440 11.200.620 15.700.620 15.701.190 30.201.380 35.1040.620 15.702.380 60.450.39
3/41.050 26.703.880 98.600.500 12.700.620 15.700.620 15.701.500 38.101.690 42.9040.620 15.702.750 69.850.56
1 1.315 33.404.250 108.00.560 14.200.690 17.500.690 17.501.940 49.302.000 50.8040.620 15.703.120 79.250.78
1-1/41.660 42.204.620 117.30.620 15.700.810 20.600.810 20.602.310 58.702.500 63.5040.620 15.703.500 88.901.03
1-1/21.900 48.305.000 127.00.690 17.500.880 22.400.880 22.302.560 65.002.880 73.1540.620 15.703.880 98.601.32
2 2.375 60.306.000 152.40.750 19.101.000 25.401.000 25.403.060 77.703.620 91.9040.750 19.104.750 120.72.06
2-1/22.875 73.007.000 177.80.880 22.401.120 28.401.120 28.403.560 90.404.120 104.640.750 19.105.500 139.73.28
33.500 88.907.500 190.50.940 23.901.190 30.201.190 30.204.250 108.05.000 127.040.750 19.106.000 152.43.85
3-1/24.000 101.68.500 215.90.940 23.901.250 31.751.250 31.754.810 122.25.500 139.780.750 19.107.000 177.84.81
44.500 114.39.000 228.60.940 23.901.310 33.301.310 33.305.310 134.96.190 157.280.750 19.107.500 190.55.3
55.563 141.310.00 254.00.940 23.901.440 36.601.440 36.606.440 163.67.310 185.780.880 22.408.500 215.96.07
66.625 168.311.00 279.41.000 25.401.560 39.601.560 39.607.560 192.08.500 215.980.880 22.409.500 241.37.45
88.625 219.113.50 342.91.120 28.401.750 44.501.750 44.509.690 246.110.62 269.780.880 22.4011.75 298.512.1
1010.75 273.016.00 406.41.190 30.201.940 49.301.940 49.3012.00 304.812.75 323.9121.000 25.4014.25 362.016.5
1212.75 323.819.00 482.61.250 31.752.190 55.602.190 55.6014.38 365.315.00 381.0121.000 25.4017.00 431.826.2
1414.00 355.621.00 533.41.380 35.102.250 57.152.250 57.1515.75 400.116.25 412.7121.120 28.4018.75 476.334.6
1616.00 406.423.50 596.91.440 36.602.500 63.502.500 63.5018.00 457.218.50 469.9161.120 28.4021.25 539.844.8
1818.00 457.225.00 635.01.560 39.602.690 68.302.690 68.3019.88 505.021.00 533.4161.250 31.7522.75 577.948.9
2020.00 508.027.50 698.51.690 42.902.880 73.152.880 73.1522.00 558.823.00 584.2201.250 31.7525.00 635.061.9
2424.00 609.632.00 812.81.880 47.803.250 82.603.250 82.6026.12 663.427.25 692.2201.380 35.1029.50 749.386.9
Class150
 

Notes:

The thread conforms to ASME B1.20.1 NTP threads as described in Section 10. (The only exceptions are small male and female plain face threaded flanges which use NPSL recount threads.)

Class 150 threaded flanges are made without a counterbore. Threads are chamfered to the major diameter (approx.) at an angle of 45° (approx.) at the back of the flange.

Weights are based on manufacturer’s data and are approximate.

Dimensions & Sizes

PipeFlange DataHubRaised FaceDrilling DataWeight
NominalPipe SizeOutside DiameterOverall DiameterCounter-bore minFlangeThickness minOverall LengthThreaded lengthminHub DiameterFace DiameterNumber of HolesBolt Hole DiameterDiameter of Circle of Holeskg/piece
inininininininininin
mmmmmmmmmmmmmmmmmmmm
1/20.840 21.303.750 95.200.930 23.600.560 14.200.880 22.300.620 15.701.500 38.101.380 35.0040.620 15.702.620 66.550.64
3/41.050 26.704.620 117.31.140 29.000.620 15.701.000 25.400.620 15.701.880 47.701.690 42.9040.750 19.003.250 82.501.12
1 1.315 33.404.880 123.91.410 35.800.690 17.501.060 26.900.690 17.502.120 53.802.000 50.8040.750 19.003.500 88.901.36
1-1/41.660 42.205.250 133.31.750 44.400.750 19.001.060 26.900.810 20.602.500 63.502.500 63.5040.750 19.003.880 98.501.68
1-1/21.900 48.306.120 155.41.980 50.500.810 20.601.190 30.200.880 22.302.750 69.852.880 73.1540.880 22.304.500 114.32.49
2 2.375 60.306.500 165.12.500 63.500.880 22.301.310 33.201.120 28.403.310 84.003.620 91.9080.750 19.005.000 127.02.87
2-1/22.875 73.007.500 190.53.000 76.201.000 25.401.500 38.101.250 31.703.940 100.04.120 104.680.880 22.305.880 149.34.32
33.500 88.908.250 209.53.630 92.201.120 28.401.690 42.901.250 31.704.620 117.35.000 127.080.880 22.306.620 168.15.85
3-1/24.000 101.69.000 228.64.130 104.91.190 30.201.750 44.401.440 36.505.250 133.35.500 139.780.880 22.307.250 184.17.34
44.500 114.310.00 254.04.630 117.61.250 31.701.880 47.701.440 36.505.750 146.06.190 157.280.880 22.307.880 200.19.61
55.563 141.311.00 279.45.690 144.51.380 35.002.000 50.801.690 42.907.000 177.87.310 185.780.880 22.309.250 234.912.3
66.625 168.312.50 317.56.750 171.41.440 36.502.060 52.301.810 45.908.120 206.28.500 215.9120.880 22.3010.62 269.715.6
88.625 219.115.00 381.08.750 222.21.620 41.102.440 61.902.000 50.8010.25 260.310.62 269.7121.000 25.4013.00 330.224.2
1010.75 273.017.50 444.510.88 276.31.880 47.702.620 66.552.190 55.6012.62 320.512.75 323.9161.120 28.4015.25 387.334.1
1212.75 323.820.50 520.712.94 328.72.000 50.802.880 73.152.380 60.4514.75 374.615.00 381.0161.250 31.7017.75 450.849.8
1414.00 355.623.00 584.214.19 360.42.120 53.803.000 76.202.500 63.5016.75 425.416.25 412.7201.250 31.7020.25 514.369.9
1616.00 406.425.50 647.716.19 411.22.250 57.153.250 82.502.690 68.3019.00 482.618.50 469.9201.380 35.0022.50 571.588.1
1818.00 457.228.00 711.218.19 462.02.380 60.453.500 88.902.750 69.8521.00 533.421.00 533.4241.380 35.0024.75 628.6109
2020.00 508.030.50 774.720.19 512.82.500 63.503.750 95.22.880 73.1523.12 587.223.00 584.2241.380 35.0027.00 685.8134
2424.00 609.636.00 914.424.19 614.42.750 69.854.190 106.43.250 82.5027.62 701.527.25 692.2241.620 41.1032.00 812.8201
Class300

Notes:

The thread conforms to ASME B1.20.1 NTP threads as described in Section 10. (The only exceptions are small male and female plain face threaded flanges which use NPSL locknut threads.)

Class 300 and higher threaded flanges are counter-bored. Threads are chamfered to the counterbore at an angle of 45° (approx).

Weights are based on manufacturer’s data and are approximate.

npt flange

Dimensions & Sizes

PipeFlange DataHubRaised FaceDrilling DataWeight
NominalPipe SizeOutside DiameterOverall DiameterCounter-bore minFlangeThickness minOverall LengthThreaded lengthminHub DiameterFace DiameterNumber of HolesBolt Hole DiameterDiameter of Circle of Holeskg/piece
inininininininininin
mmmmmmmmmmmmmmmmmmmm
1/20.840 21.303.750 95.300.930 23.600.560 14.200.880 22.400.620 15.701.500 38.101.380 35.1040.620 15.702.620 66.550.74
3/41.050 26.704.620 117.31.140 29.000.620 15.701.000 25.400.620 15.701.880 47.801.690 42.9040.750 19.103.250 82.601.27
1 1.315 33.404.880 124.01.410 35.800.690 17.501.060 26.900.690 17.502.120 53.802.000 50.8040.750 19.103.500 88.901.52
1-1/41.660 42.205.250 133.41.750 44.500.810 20.601.120 28.400.810 20.602.500 63.502.500 63.5040.750 19.103.880 98.602.03
1-1/21.900 48.306.120 155.41.990 50.500.880 22.401.250 31.750.880 22.402.750 69.852.880 73.1540.880 22.404.500 114.32.96
2 2.375 60.306.500 165.12.500 63.501.000 25.401.440 36.601.120 28.403.310 84.103.620 91.9080.750 19.105.000 127.03.62
2-1/22.875 73.007.500 190.53.000 76.201.120 28.401.620 41.101.250 31.753.940 100.14.120 104.680.880 22.405.880 149.45.28
33.500 88.908.250 209.63.630 92.201.250 31.751.810 46.001.380 35.104.620 117.35.000 127.080.880 22.406.620 168.17
3-1/24.000 101.69.000 228.6413.0 104.91.380 35.101.940 49.301.560 39.605.250 133.45.500 139.781.000 25.407.250 184.28.84
44.500 114.310.00 254.04.630 117.61.380 35.102.000 50.801.440 36.605.750 146.16.190 157.281.000 25.407.880 200.211.1
55.563 141.311.00 279.45.690 144.51.500 38.102.120 53.801.690 42.907.000 177.87.310 185.781.000 25.409.250 235.013.9
66.625 168.312.50 317.56.750 171.51.620 41.102.250 57.151.810 46.008.120 206.28.500 215.9121.000 25.4010.62 269.718.3
88.625 219.115.00 381.08.750 222.31.880 47.802.690 68.302.000 50.8010.25 260.410.62 269.7121.120 28.4013.00 330.228.6
1010.75 273.017.50 444.510.88 276.42.120 53.802.880 73.152.190 55.6012.62 320.512.75 323.9161.250 31.7515.25 387.439.2
1212.75 323.820.50 520.712.94 328.72.250 57.153.120 79.252.380 60.4514.75 374.715.00 381.0161.380 35.1017.75 450.957
1414.00 355.623.00 584.214.19 360.42.380 60.453.310 84.102.500 63.5016.75 425.516.25 412.8201.380 35.1020.25 514.479.1
1616.00 406.425.50 647.716.19 411.22.500 63.503.690 93.702.690 68.3019.00 482.618.50 469.9201.500 38.1022.50 571.5101
1818.00 457.228.00 711.218.19 462.02.620 66.553.880 98.602.750 69.8521.00 533.421.00 533.4241.500 38.1024.75 628.7123
2020.00 508.030.50 774.720.19 512.82.750 69.854.000 101.62.880 73.1523.12 587.223.00 584.2241.620 41.1027.00 685.8146
2424.00 609.636.00 914.424.19 614.43.000 76.204.500 114.33.250 82.6027.62 701.527.25 692.2241.880 47.8032.00 812.8219
Class400
 

Notes:

The thread conforms to ASME B1.20.1 NTP threads as described in Section 10. (The only exceptions are small male and female plain face threaded flanges which use NPSL locknut threads.)

Class 300 and higher threaded flanges are counter-bored. Threads are chamfered to the counterbore at an angle of 45° (approx).

Weights are based on manufacturer’s data and are approximate.

Dimensions & Sizes

PipeFlange DataHubRaised FaceDrilling DataWeight
NominalPipe SizeOutside DiameterOverall DiameterCounter-bore minFlangeThickness minOverall LengthThreaded lengthminHub DiameterFace DiameterNumber of HolesBolt Hole DiameterDiameter of Circle of Holeskg/piece
inininininininininin
mmmmmmmmmmmmmmmmmmmm
1/20.840 21.303.750 95.200.930 23.600.560 14.200.880 22.400.620 15.701.500 38.101.380 35.1040.620 15.702.620 66.550.74
3/41.050 26.704.620 117.31.140 29.000.620 15.701.000 25.400.620 15.701.880 47.801.690 42.9040.750 19.103.250 82.601.27
1 1.315 33.404.880 124.01.410 35.800.690 17.501.060 26.900.690 17.502.120 53.802.000 50.8040.750 19.103.500 88.901.52
1-1/41.660 42.205.250 133.41.750 44.500.810 20.601.120 28.400.810 20.602.500 63.502.500 63.5040.750 19.103.880 98.602.03
1-1/21.900 48.306.120 155.41.990 50.500.880 22.401.250 31.750.880 22.402.750 69.852.880 73.1540.880 22.404.500 114.32.96
2 2.375 60.306.500 165.12.500 63.501.000 25.401.440 36.601.120 28.403.310 84.103.620 91.9080.750 19.105.000 127.03.62
2-1/22.875 73.007.500 190.53.000 76.201.120 28.401.620 41.101.250 31.753.940 100.14.120 104.680.880 22.405.880 149.45.28
33.500 88.908.250 209.63.630 92.201.250 31.751.810 46.001.380 35.104.620 117.35.000 127.080.880 22.406.620 168.17
3-1/24.000 101.69.000 228.64.130 104.91.380 35.101.940 49.301.560 39.605.250 133.45.500 139.781.000 25.407.250 184.28.84
44.500 114.310.75 273.14.630 117.61.500 38.102.120 53.801.620 41.106.000 152.46.190 157.281.000 25.408.500 215.914.5
55.563 141.313.00 330.25.690 144.51.750 44.502.380 60.451.880 47.807.440 189.07.310 185.781.120 28.4010.50 266.724.4
66.625 168.314.00 355.66.750 171.51.880 47.802.620 66.552.000 50.808.750 222.38.500 215.9121.120 28.4011.50 292.128.7
88.625 219.116.50 419.18.750 222.32.190 55.603.000 76.202.250 57.1510.75 273.110.62 269.7121.250 31.7513.75 349.343.4
1010.75 273.020.00 508.010.88 276.42.500 63.503.380 85.902.560 65.0013.50 342.912.75 323.9161.380 35.1017.00 431.870.3
1212.75 323.822.00 558.812.94 328.72.620 66.553.620 91.902.750 69.8515.75 400.115.00 381.0201.380 35.1019.25 489.084.2
1414.00 355.623.75 603.314.19 360.42.750 69.853.690 93.702.880 73.1517.00 431.816.25 412.8201.500 38.1020.75 527.198.7
1616.00 406.427.00 685.816.19 411.23.000 76.204.190 106.43.060 77.7019.50 495.318.50 469.9201.620 41.1023.75 603.3142
1818.00 457.229.25 743.018.19 462.03.250 82.604.620 117.33.120 79.2521.50 546.121.00 533.4201.750 44.5025.75 654.1173
2020.00 508.032.00 812.820.19 512.83.500 88.905.000 127.03.250 82.6024.00 609.623.00 584.2241.750 44.5028.50 723.9220
2424.00 609.637.00 939.824.19 614.44.000 101.65.500 139.73.620 91.9028.25 717.627.25 692.2242.000 50.8033.00 838.2312
Class600

Notes:

The thread conforms to ASME B1.20.1 NTP threads as described in Section 10. (The only exceptions are small male and female plain face threaded flanges which use NPSL locknut threads.)

Class 300 and higher threaded flanges are counter-bored. Threads are chamfered to the counterbore at an angle of 45° (approx).

Weights are based on manufacturer’s data and are approximate.

Dimensions & Sizes

PipeFlange DataHubRaised FaceDrilling DataWeight
NominalPipe SizeOutside DiameterOverall DiameterCounter-bore minFlangeThickness minOverall LengthThreaded lengthminHub DiameterFace DiameterNumber of HolesBolt Hole DiameterDiameter of Circle of Holeskg/piece
inininininininininin
mmmmmmmmmmmmmmmmmmmm
1/20.840 21.304.750 120.60.930 23.600.880 22.301.250 31.700.880 22.301.500 38.101.380 35.1040.880 22.303.250 82.501.74
3/41.050 26.705.120 130.01.140 29.001.000 25.401.380 35.001.000 25.401.750 44.401.690 42.9040.880 22.303.500 88.902.34
1 1.315 33.405.880 149.31.410 35.801.120 28.401.620 41.101.120 28.402.060 52.302.000 50.8041.000 25.404.000 101.63.44
1-1/41.660 42.206.250 158.71.750 44.401.120 28.401.620 41.101.190 30.202.500 63.502.500 63.5041.000 25.404.380 111.23.91
1-1/21.900 48.307.000 177.81.990 50.501.250 31.701.750 44.501.250 31.702.750 69.852.880 73.1541.120 28.404.880 123.95.36
2 2.375 60.308.500 215.92.500 63.501.500 38.102.250 57.151.500 38.104.120 104.63.620 91.9081.000 25.406.500 165.19.85
2-1/22.875 73.009.620 244.33.000 76.201.620 41.102.500 63.501.880 47.704.880 123.94.120 104.681.120 28.407.500 190.513.7
33.500 88.909.500 241.33.630 92.201.500 38.102.120 53.801.620 41.105.000 127.05.000 127.081.000 25.407.500 190.511.6
44.500 114.311.50 292.14.630 117.61.750 44.402.750 69.851.880 47.806.250 158.76.190 157.281.250 31.709.250 234.919.7
55.563 141.313.75 349.25.690 144.52.000 50.803.120 79.252.120 53.807.500 190.57.310 185.781.380 35.0011.00 279.431.9
66.625 168.315.00 381.06.750 171.42.190 55.603.380 85.802.250 57.159.250 234.98.500 215.9121.250 31.7012.50 317.541.1
88.625 219.118.50 469.98.750 222.22.500 63.504.000 101.62.500 63.5011.75 298.410.62 269.7121.500 38.1015.50 393.770.7
1010.75 273.021.50 546.110.88 276.32.750 69.854.250 107.92.810 71.4014.50 368.312.75 323.9161.500 38.1018.50 469.9101
1212.75 323.824.00 609.612.94 328.73.120 79.404.620 117.33.000 76.2016.50 419.115.00 381.0201.500 38.1021.00 533.4133
1414.00 355.625.25 641.314.19 360.43.380 85.705.120 130.03.250 82.5017.75 450.816.25 412.7201.620 41.1022.00 558.8153
1616.00 406.427.75 704.816.19 411.23.500 88.905.250 133.33.380 85.9020.00 508.018.50 469.9201.750 44.4024.25 618.9185
1818.00 457.231.00 787.418.19 462.04.000 101.66.000 152.43.500 88.9022.25 565.121.00 533.4202.000 50.8027.00 685.8258
2020.00 508.033.75 857.220.19 512.84.250 107.96.250 158.73.620 91.9024.50 622.323.00 584.2202.120 53.8029.50 749.3317
2424.00 609.641.00 1041.424.19 614.45.500 139.78.000 203.24.000 101.629.50 749.327.25 692.2202.620 66.5535.50 901.7606
Class900
 

Notes:

The thread conforms to ASME B1.20.1 NTP threads as described in Section 10. (The only exceptions are small male and female plain face threaded flanges which use NPSL locknut threads.)

Class 300 and higher threaded flanges are counter-bored. Threads are chamfered to the counterbore at an angle of 45° (approx).

Weights are based on manufacturer’s data and are approximate.

Dimensions & Sizes

PipeFlange DataHubRaised FaceDrilling DataWeight
NominalPipe SizeOutside DiameterOverall DiameterCounter-bore minFlangeThickness minOverall LengthThreaded lengthminHub DiameterFace DiameterNumber of HolesBolt Hole DiameterDiameter of Circle of Holeskg/piece
inininininininininin
mmmmmmmmmmmmmmmmmmmm
1/20.840 21.304.750 120.60.930 23.600.880 22.301.250 31.700.880 22.301.500 38.101.380 35.0040.880 22.303.250 82.501.74
3/41.050 26.705.120 130.01.140 29.001.000 25.401.380 35.001.000 25.401.750 44.401.690 42.9040.880 22.303.500 88.902.34
1 1.315 33.405.880 149.31.410 35.801.120 28.401.620 41.101.120 28.402.060 52.302.000 50.8041.000 25.404.000 101.63.44
1-1/41.660 42.206.250 158.71.750 44.401.120 28.401.620 41.101.190 30.202.500 63.502.500 63.5041.000 25.404.380 111.23.91
1-1/21.900 48.307.000 177.81.990 50.501.250 31.701.750 44.501.250 31.702.750 69.852.880 73.1541.120 28.404.880 123.95.36
2 2.375 60.308.500 215.92.500 63.501.500 38.102.250 57.151.500 38.104.120 104.63.620 91.9081.000 25.406.500 165.19.85
2-1/22.875 73.009.620 244.33.000 76.201.620 41.102.500 63.501.880 47.704.880 123.94.120 104.681.120 28.407.500 190.513.7
Class1500
 

Notes:

The thread conforms to ASME B1.20.1 NTP threads as described in Section 10. (The only exceptions are small male and female plain face threaded flanges which use NPSL locknut threads.)

Class 300 and higher threaded flanges are counter-bored. Threads are chamfered to the counterbore at an angle of 45° (approx).

Weights are based on manufacturer’s data and are approximate.

Dimensions & Sizes

PipeFlange DataHubRaised FaceDrilling DataWeight
NominalPipe SizeOutside DiameterOverall DiameterCounter-bore minFlangeThickness minOverall LengthThreaded lengthminHub DiameterFace DiameterNumber of HolesBolt Hole DiameterDiameter of Circle of Holeskg/piece
inininininininininin
mmmmmmmmmmmmmmmmmmmm
1/20.840 21.305.250 133.40.930 23.601.190 30.201.560 39.601.120 28.401.690 42.901.380 35.1040.880 22.403.500 88.902.95
3/41.050 26.705.500 139.71.140 29.001.250 31.751.690 42.901.250 31.752.000 50.801.690 42.9040.880 22.403.750 95.303.44
1 1.315 33.406.250 158.81.410 35.801.380 35.101.880 47.801.380 35.102.250 57.152.000 50.8041.000 25.404.250 108.04.82
1-1/41.660 42.207.250 1.8421.750 44.501.500 38.102.060 52.301.500 38.102.880 73.152.500 63.5041.120 28.405.120 130.07.14
1-1/21.900 48.308.000 203.21.990 50.501.750 44.502.380 60.451.750 44.503.120 79.252.880 73.1541.250 31.755.750 146.110
2 2.375 60.309.250 235.02.500 63.502.000 50.802.750 69.852.000 50.803.750 95.303.620 91.9081.120 28.406.750 171.514.8
2-1/22.875 73.0010.50 266.73.000 76.202.250 57.153.120 79.252.250 57.154.500 114.34.120 104.681.250 31.757.750 196.921.5
Class2500
 

Notes:

The thread conforms to ASME B1.20.1 NTP threads as described in Section 10. (The only exceptions are small male and female plain face threaded flanges which use NPSL locknut threads.)

Class 300 and higher threaded flanges are counter-bored. Threads are chamfered to the counterbore at an angle of 45° (approx).

Weights are based on manufacturer’s data and are approximate.

Materials

1  Carbon Steel & Alloy Steel

Material Group No.

Nominal Designation

Pressure-Temperature Rating Table

Forgings

Castings

Plates

1.1

C-Si

2-1.1

A105

A216 Gr. WCB

A515 Gr. 70

C-Mn-Si

A350 Gr. LF2

…

A516 Gr. 70, A537 Cl. 1

C-Mn-Si-V

A350 Gr. LF6 Cl. 1

…

…

3½Ni

A350 Gr. LF3

…

…

1.2

C-Mn-Si

2-1.2

…

A216 Gr. WCC

…

C-Mn-Si-V

A350 Gr. LF6 Cl. 2

A352 Gr. LCC, LC2, LC3

…

3½Ni

…

A352 Gr. LC3

A203 Gr. E

1.3

C-Si

2-1.3

…

A352 Gr. LCB

A515 Gr. 65

2½Ni

…

…

A203 Gr. A

C-½Mo

…

A217 Gr. WC1

A204 Gr. B

1.4

C-Si

2-1.4

…

…

A515 Gr. 60

C-Mn-Si

A350 Gr. LF1 Cl. 1

…

A516 Gr. 60

1.5

C-½Mo

2-1.5

A182 Gr. F1

…

A204 Gr. B

1.7

Ni-Cr-½Mo

2-1.7

A182 Gr. F2

A217 Gr. WC4

…

¾Ni-¾Cr-1Mo

…

A217 Gr. WC6

…

1.9

1¼Cr-½Mo

2-1.9

A182 Gr. F11 Cl. 2

…

A387 Gr. 11 Cl. 2

1.1

2¼Cr-1Mo

2-1.10

A182 Gr. F22 Cl. 3

A217 Gr. WC9

A387 Gr. 22 Cl. 2

1.11

C-½Mo

2-1.11

…

…

A204 Gr. C

1.13

5Cr-½Mo

2-1.13

A182 Gr. F5a

A217 Gr. C5

…

1.14

9Cr-1Mo-V

2-1.14

A182 Gr. F91 Type 1

A217 Gr. C12A

A387 Gr. 91 Cl. 2

1.17

1Cr-½Mo

2-1.17

A182 Gr. F12 Cl. 2

A217 Gr. C12

…

1.18

9Cr-2W-V

2-1.18

A182 Gr. F92

…

…

2 Stainless Steel & Duplex Stainless Steel

Material Group No.

Nominal Designation

Pressure-Temperature Rating Table

Forgings

Castings

Plates

2.1

18Cr-8Ni

2-2.1

A182 Gr. F304

A351 Gr. CF3

A240 Gr. 304

18Cr–8Ni18Cr-8Ni

A182 Gr. F304H

A351 Gr. CF8

A240 Gr. 304H

2.2

16Cr-12Ni-2Mo

2-2.2

A182 Gr.F316

A351 Gr.CF3M

A240 Gr.316

16Cr-12Ni-2Mo

A182 Gr.F316H

A351 Gr.CF8M

A240 Gr.316H

18Cr-13Ni-3Mo

A182 Gr.F317

…

A240 Gr.317  

19Cr-10Ni-3Mo

…

A351 Gr.CG8M

…

2.3

18Cr-8Ni

2-2.3

A182 Gr.F304L

…

A240 Gr.304L

16Cr-12Ni-2Mo

A182 Gr.F316L

…

A240 Gr.316L

18Cr-13Ni-3Mo

A182 Gr.F317L

…

…

2.4

18Cr-10Ni-Ti

2-2.4

A182 Gr.F321  

…

A240 Gr.321

18Cr-10Ni-Ti

A182 Gr.F321H

…

A240 Gr.321H

2.5

18Cr-10Ni-Cb

2-2.5

A182 Gr. F347

…

A240 Gr. 347

18Cr-10Ni-Cb

A182 Gr. F347H

…

A240 Gr. 347H

18Cr-10Ni-Cb

A182 Gr. F348

…

A240 Gr. 348

18Cr-10Ni-Cb

A182 Gr. F348H

…

A240 Gr. 348H

2.6

23Cr-12Ni

2-2.6

…

…

A240 Gr. 309H

2.7

25Cr-20Ni

2-2.7

A182 Gr. F310

…

A240 Gr. 310H

2.8

20Cr-18Ni-6Mo

2-2.8

A182 Gr. F44

A351 Gr. CK3MCuN

A240 Gr. S31254

22Cr-5Ni-3Mo-N

2-2.8

A182 Gr. F51

–

A240 Gr. S31803

25Cr-7Ni-4Mo-N

2-2.8

A182 Gr. F53

–

A240 Gr. 32750

24Cr-10Ni-4Mo-V

2-2.8

…

A995 Gr. CEBMN

…

25Cr-5Ni-2Mo-3Cu-N

2-2.8

…

A995 Gr. CD4MCuN

…

25Cr-7Ni-3.5Mo-W-Cb

2-2.8

…

A995 Gr. CD3MWCuN

…

25Cr-7.5Ni-3.5Mo-N-Cu-W

2-2.8

A182 Gr. F55

…

A240 Gr. S32760

2.9

23Cr-12Ni

2-2.9

…

…

A240 Gr. 309S

25Cr-12Ni

2-2.9

…

…

A240 Gr. 310S

2.1

25Cr-12Ni

2-2.10

…

A351 Gr. CH8

…

25Cr-12Ni

2-2.10

…

A351 Gr. CH20

…

2.11

18Cr-10Ni-Cb

2-2.11

…

A351 Gr. CF8C

…

2.12

25Cr-20Ni

2-2.12

…

A351 Gr. CK20

…

3 High Alloy Steel

Material Group No.

Nominal Designation

Pressure-Temperature Rating Table

Forgings

Castings

Plates

3.1

35Ni-35Fe-20Cr-Cb

2-3.1

A182 Gr.N08020

…

A182 Gr.N08020

3.2

99.0Ni

2-3.2

B564 Gr.N02200

…

B162 Gr.N02200

3.3

99.0Ni-Low C

2-3.3

…

…

B162 Gr.NO2201

3.4

67Ni-30Cu

2-3.4

B564 Gr.N04400

…

B127 Gr.N04400

3.5

72Ni-15Cr-8Fe

2-3.5

B564 Gr.N06600

…

B168 Gr.N06600

3.6

33Ni-42Fe-21Cr

2-3.6

A182 Gr.N08800

…

A182 Gr.N08800

3.7

65Ni-28Mo-2Fe

2-3.7

B462 Gr.N10665

…

B333 Gr.N10665

64Ni-29.5Mo-2Cr-2Fe-Mn-W

B462 Gr.N10675

…

B333 Gr.N10675

3.8

54Ni-16Mo-15Cr

2-3.8

B462 Gr.N10276

…

B575 Gr.N10276

60Ni-22Cr-9Mo-3.5Cb

B564 Gr.N06625

…

B443 Gr.N06625

62Ni-28Mo-5Fe

…

…

B333 Gr.N10001

70Ni-16Mo-7Cr-5Fe

…

…

B434 Gr.N10003

61Ni-16Mo-16Cr

…

…

B575 Gr.N06455

42Ni-21.5Cr-3Mo-2.3Cu

B564 Gr.N08825

…

B424 Gr.N08825

55Ni-21Cr-13.5Mo

B462 Gr.N06022

…

B575 Gr.N06022

55Ni-23Cr-16Mo-1.6Cu

B462 Gr.N06200

…

B575 Gr.N06200

3.9

47Ni-22Cr-9Mo-I8Fe

2-3.9

B572 Gr.N06002

…

B435 Gr.N06002

21Ni-30Fe-22Cr-18Co-3Mo-3W

B572 Gr.R30556

…

B435 Gr.R30556

3.10

25Ni-47Fe-21Cr-5Mo

2-3.10

…

…

B599 Gr.N08700

3.11

44Fe-25Ni-21Cr-Mo

2-3.11

A182 Gr.N08904

…

A240 Gr.N08904

3.12

26Ni-43Fe-22Cr-5Mo

2-3.12

…

…

B620 Gr.N08320

47Ni-22Cr-20Fe-7Mo

…

…

B582 Gr.N06985

46Fe-24Ni-21Cr-6Mo-Cu-N

A182 Gr.N08367

A351 Gr.CN3MN

B688 Gr.N08367

46Fe-24Ni-21Cr-6Mo-Cu-N

B462 Gr.N08367

A351 Gr.CN3MN

B688 Gr.N08367

3.13

49Ni-25Cr-18Fe-6Mo

2-3.13

…

…

B582 Gr.N06975

Ni-Fe-Cr-Mo-Cu-Low C

B564  Gr.N08031

…

B625 Gr.N08031

3.14

47Ni–22Cr–19Fe–6Mo

2-3.14

…

…

B582 Gr. N06007

40Ni–29Cr–15Fe–5Mo

B462 Gr. N06030

…

B582 Gr. N06030

58Ni–33Cr–8Mo

B462 Gr. N06035

…

B575 Gr. N06035

3.15

42Ni–42Fe–21Cr

2-3.15

A182 Gr. N08810

…

A240 Gr. N08810

42Ni–42Fe–21Cr

B564 Gr. N08810

…

B409 Gr. N08810

3.16

35Ni–19Cr–1¼Si

2-3.16

B511 Gr. N08330

…

B536 Gr. N08330

3.17

29Ni–20.5Cr–3.5Cu–2.5Mo

2-3.17

…

A351 Gr. CN7M

…

3.19

57Ni–22Cr–14W–2Mo–La

2-3.19

B564 Gr. N06230

…

B435 Gr. N06230

Dimensions and Tolerances

Tolerances on flange dimensions (ASME/ANSI B16.5 and B16.47, and MSS SP-44)

Dimension

Range

Tolerance

in

mm

General and Blind Flanges (For blind flange dimensions see page 8-23 for B16.5, page 8-46 for B16.47 Series A / MSS SP-44 and page 8-51 for B16.47 Series B / API 605):

G (raised face diameter)

< NPS 24

±0.03

±0.76

> NPS 26, with 0.06 in raised face

±0.08

±2.03

> NPS 26, with0.25 in raised face

±0.04

±1.02

I (bolt hole diameter)

All

No tolerance in B16.5 or B16.47

J (bolt circle diameter)

All

±0.06

±1.52

Centre to centre of adjacent bolt holes

All

±0.03

±0.76

Eccenticity of bolt circleand machined facing diameters

< NPS 21/2

±0.03

±0.76

> NPS 3

±0.06

±1.52

Weld Neck Flanges1 (For dimensions see page 8-10 for B16.5, page 8-46 for B16.47 Series A / MSS SP-44 and page 8-51 for B16.47 Series B / API 605):

D (overall length)

< NPS 4

0.06

1.52

NPS 5 to 10

+0.06, -0.12

+1.52, -3.05

NPS 12 to 24

+0.12, -0.18

+3.05, -4.57

> NPS 26

±0.19

±4.83

Thickness of hub

All

> 87.5% of pipe nominal wall thickness

Slip on (see page 8-17), Lap Joint (see page 8-32 for dimensions) and Socket Welding (see page 8-30 fordimensions) Flanges:

B (inside diameter, or bore)

< NPS 10

+0.03, -0.0

+0.76, -0.0

> NPS 12

+0.06, -0.0

+1.52, -0.0

Threaded Flanges (see page 8-40 for dimensions):

B (counterbore)(Not applicable forClass 150 lb)

< NPS 10

+0.03, -0.0

+0.76, -0.0

> NPS 12

+0.06, -0.0

+1.52, -0.0

This precision NPT flange provides reliable, weld-free connections for industrial piping systems. Manufactured from corrosion-resistant F304 stainless steel according to ASME B16.5 standards, this durable NPT flange ensures excellent performance across pressure ratings from 150 to 2500#. The NPT threaded design allows for easy installation and maintenance without welding equipment. As a trusted pipe flange supplier, we guarantee superior material quality and precise threading for secure connections. Ideal for chemical processing, oil and gas, and food industry applications, this versatile NPT flange offers cost-effective solutions where frequent maintenance and corrosion resistance are essential. Our reliable pipe flange supplier services include full material traceability and technical support for demanding applications.
 

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