American Gas Association Table 8

1. Appendix C Previous Page
Orifice M e t e r Tables for N a t u r a l G a s
Table C-1 Fb Basic Orifice Factors—Flange Taps, page 304
Table C-2 "b" Values for Reynolds Number Factor Fr
Determination—Flange Taps, page 310
Table C-3 Y1 Expansion Factors—Flange Taps (Static Pressure
Taken from Upstream Taps), page 316
Table C-4 Y2 Expansion Factors—Flange Taps (Static Pressure
Taken from Downstream Taps), page 318
Table C-5 Ym Expansion Factors—Flange Taps (Static Pressure
Mean of Upstream and Downstream), page 320
Table C-6 Fb Basic Orifice Factors—Pipe Taps, page 322
Table C-7 "b" Values for Reynolds Number Factor Fr
Determination—Pipe Taps, page 328
Table C-8 Y1 Expansion Factors—Pipe Taps (Static Pressure
Taken from Upstream Taps), page 334
Table C-9 Y2 Expansion Factors—Pipe Taps (Static Pressure
Taken from Downstream Taps), page 336

2. Table C-1 F b Basic Orifice Factors—Flange Taps
Base temperature = 600F
Flowing temperature = 600F
Base pressure = 14.73 psla
Specific gravity = 1.0
Pipe Sizes—Nominal and Published Inside Diameters, in
Orifice 2 3 4
Diameter
(in) 1.689 1.939 2.067 2.300 2.626 2.900 3.068 3.152 3.438
0.250 12.695 12.707 12.711 12.714 12.712 12.708 12.705 12.703 12.697
0.375 28.474 28.439 28.428 28.411 28.393 28.382 28.376 28.373 28.364
0.500 50.777 50.587 50.521 50.435 50.356 50.313 50.292 50.284 50.258
0.625 80.090 79.509 79.311 79.052 78.818 78.686 78.625 78.598 78.523
0.750 117.09 115.62 115.14 114.52 113.99 113.70 113.56 113.50 113.33
0.875 162.95 159.56 158.47 157.12 156.00 155.41 155.14 155.03 154.71
1.000 219.77 212.47 210.22 207.44 205.18 204.04 203.54 203.33 202.75
1.125 290.99 276.20 271.70 266.35 262.06 259.95 259.04 258.65 257.63
1.250 385.78 353.58 345.13 335.12 327.39 323.63 322.03 321.37 319.61
1.375 448.57 433.50 415.75 402.18 395.80 393.09 391.97 389.03
1.500 542.26 510.86 487.98 477.36 472.96 471.14 466.39
1.625 623.91 586.82 569.65 562.58 559.72 552.31
1.750 701.27 674.44 663.42 658.96 647.54
1.875 834.88 793.88 777.18 770.44 753.17
2.000 930.65 906.01 896.06 870.59
2.125 1,091.2 1,052.5 1,038.1 1,001.4
2.250 1,223.2 1,199.9 1,147.7
2.375 1,311.7
2.500 1,498.4

3. Orifice 4 6 8
Diameter
(in) 3.826 4.026 4.897 5.182 5.761 6.065 7.625 7.981 8.071
0.250 12.687 12.683
0.375 28.353 28.348
0.500 50.234 50.224 50.197 50.191 50.182 50.178
0.625 78.450 78.421 78.338 78.321 78.296 78.287
0.750 113.15 113.08 112.87 112.82 112.75 112.72
0.875 154.40 154.27 153.88 153.78 153.63 153.56 153.34 153.31 153.31
202.20 201.99 201.34 201.19 200.96 200.85 200.46 200.39 200.38
1.000
256.69 256.33 255.31 255.08 254.72 254.56 253.99 253.69 253.87
1.125
318.03 317.45 315.83 315.48 314.95 314.72 313.91 313.78 313.74
1.250 386.45 385.51 382.99 382.47 381.70 381.37 380.25 380.06 380.02
1.375 462.27 460.79 456.93 456.16 455.03
1.500 454.57 453.02 452.78 452.72
545.89 543.61 537.77 536.64 535.03 534.38 532.27 531.95 531.87
1.625 637.84 634.39 625.73 624.09 621.79 620.88 618.02 617.60 617.50
1.750 738.75 733.68 721.03 718.69 715.44
714.19 710.32 709.77 709.64
1.875 849.41 842.12 823.99 820.68 816.13
814.41 809.22 808.50
2.000 970.95 960.48 934.97 930.35 924.07 808.34
1,104.7 1,089.9 921.71 914.79 913.86
2.125 1,054.4 1,048.1 913.64
1,039.5 1,036.3
2.250 1,252.1 1,231.7 1,182.9 1,174.2 1,027.1 1,025.9 1,025.6
1,162.6 1,158.3
2.375 1,415.0 1,387? 1,320.9 1,309.3 1,146.2 1,144.7 1,144.3
1,293.8 1,288.2
1,595.6 1,558.2 1,469.2 1,453.9 1,272.3 1,270.3 1,269.8
2.500 1,433.5 1,426.0
1,797.1 1,746.7 1,628.9 1,608.7 1,405.4 1,402.9
2.625 1,582.1 1,572.3 1,402.3
1,955.5 1,801.0 1,774.5 1,545.7
2.750 1,740.0 1,727.5 1,542.5 1,541.8
2,194.9 1,986.6 1,952.4 1,693.4 1,689.3
2.875 2,187.2 2,143.4 1,907.8 1,891.9
1,848.6
1,688.4
1,843.5
3.000 2,404.2 2,348.8 P086 4 2,066.1 1,842.3
2,011 6 2,005.2
3.125 2,639.5 2,569.8 2,276.5 2,250.8 2,003.8
2,182.6
3.250 2,895.5 2,808.1 2,479.1 2,446.8 2,174.6 2,172.9
3.375 3,180.8 3,065.3 2,695.1 2,654.9 2,361.8 2,352.0 2,349.9
3.500 2,925.7 2,876.0 2,654.9 2,537.7
3,345.5 2,535.0
3.625 3,172.1 3,111.2 2,746.5 2,731.8
3,657.7 2,728.6
3.750 3,435.7 3,361.5 2,952.6 2,934.8 2,930.8
3.875 3,718.2 3,628.2 3,168.3 3,146.9 3,142.1
4,354.8 4,216.6 3,394.3 3,368.5
4.000 3,362.9
4.250 4,900.9 3,879.4 3,842.3 3,834.2
4.500 4,412.8 4,360.5 4,349.0
4.750 5,000.7 4,928.1 4,912.2
5.000 5,650.0 5,551.1 5,529.5
5.250 6,369.3 6,236.4 6,207.3
5.500 7,170.9 6,992.0 6,953.6
5.750 7,830.0 7,777.8
6.000 8,706.9

4. Orifice 10 12 16
Diameter
(in) 9.564 10.020 10.136 11.376 11.938 12.090 14.688 15.000 15.250
1,000 200.20
1.125 253.55 253.48 253.47
1.250 313.31 313.20 313.18 312.94 312.85 312.83
1.375 379.44 379.29 379.26 378.94 378.82 378.79
1.500 451.95 451.76 451.72 451.30 451.14 451.10 450.53 450.48
1.625 530.87 530.63 530.57 530.04 529.83 529.78 529.06 528.99 528.94
1.750 616.21 615.90 615.83 615.16 614.90 614.84 613.94 613.85 613.78
1.875 707.99 707.61 707.51 706.68 706.36 706.28 705.18 705.07 704.99
2.000 806.23 805.76 805.65 804.61 804.23 804.13 802.78 802.65 802.55
2.125 910.97 910.38 910.24 908.98 908.51 908.39 906.77 906.61 906.49
2.250 1,022.2 1,021.5 1,021.3 1,019.8 1,019.2 1,019.1 1,017.1 1,017.0 1,016.8
2.375 1,140.1 1,139.2 1,139.0 1,137.1 1,136.4 1,136.2 1,133.9 1,133.7 1,133.5
2.500 1,264.5 1,263.4 1,263.1 1,260.8 1,260.0 1,259.8 1,257.1 1,256.8 1,256.6
2.625 1,395.6 1,394.2 1,393.9 1,391.1 1,390.1 1,389.9 1,386.7 1,386.4 1,386.1
2.750 1,533.4 1,531.7 1,531.3 1,528.0 1,526.8 1,526.5 1,522.7 1,522.4 1,522.1
2.875 1,678.0 1,675.9 1,675.4 1,671.4 1,670.0 1,669.6 1,665.2 1,664.8 1,664.5
3.000 1,829.4 1,826.9 1,826.3 1,821.4 1,819.7 1,819.3 1,814.1 1,813.7 1,813.3
3.125 1,987.8 1,984.7 1,984.0 1,978.1 1,976.1 1,975.6 1,969.6 1,969.0 1,966.6
3.250 2,153.2 2,149.5 2,148.6 2,141.5 2,139.2 2,130.6 2,131.5 2,130.9 2,130.4
3.375 2,325.7 2,321.2 2,320.2 2,311.7 2,308.9 2,308.2 2,299.9 2,299.2 2,293.7
3.500 2,505.6 2,500.1 2,498.9 2,488.7 2,485.4 2,484.6 2,474.9 2,474.1 2,473.5
3.625 2,692.8 2,686.2 2,684.7 2,672.6 2,668.7 2,667.7 2,656.4 2,655.5 2,654.8
3.750 2,887 6 2,879.7 2,877.9 2,863.5 2,858.8 2,857.7 2,844.6 2,843.5 2,842.7
3.875 3,090.1 3,080.7 3,078.5 3,061.4 3,055.9 3,054.6 3,039.4 3,038.1 3,037.2
4.000 3,300.6 3,289.3 3,286.8 3,266.4 3,260.0 3,258.5 3,240.8 3,239.4 3,238.3
4.250 3,746.1 3,730.2 3,726.7 3,698.4 3,689.6 3,687.5 3,663.8 3,661.9 3,660.5
4.500 4,226.0 4,204.1 4,199.2 4,160.4 4,148.4 4,145.5 4,113.9 4,111.5 4,109.7
4.750 4,742.7 4,712.8 4,706.2 4,653.4 4,637.2 4,633.4 4,591.5 4,508.4 4,586.0
5.000 5,298.6 5,258.5 5,249.6 5,179.0 5,157.4 5,152.3 5,097.2 5,093.1 5,090.1
5.250 5,897 4 5,843.6 5,831.8 5,738.5 5,710.0 5,703.3 5,631.4 5,626.1 5,622.3
5.500 6,543.1 6,471.9 6,456.3 6,333.8 6,296.6 6,287.9 6,194.8 6,180.1 6,183.1

5. Orifice 10 12 16
Diameter
(in) 9.564 10.020 10.136 11.376 11.938 12.090 14.688 15.000 15.250
5.750 7,240.0 7,146.9 7,126.5 6,966.9 6,919.0 6,907.8 6,788.1 6,779.5 6,773.3
6.000 7,993.3 7,873.0 7,846.6 7,640.4 7,579.0 7,564.7 7,412.3 7,401.5 7,393.6
6.250 8,808.9 8,654.8 8,621.1 8,357.3 8,278.9 8,260.7 8,060.4 8,054.8 8,044.8
6.500 9,693 3 9,498.1 9,455.3 9,121.0 9,021.7 8,998.7 8,757.3 8,740.3 8,727.9
6.750 10,654 10,409 10,355 9,935.2 9,810.5 9,781.6 9,480.4 9,459.4 9,444.0
7.000 11,711 11,394 11,327 10,804 10,649 10,613 10,239 10,213 10,194
7.250 12,467 12,381 11,732 11,540 11,496 11,035 11,003 10,980
7.500 13,656 13,541 12,725 12,489 12,434 11,869 11,831 11,803
7.750 13,787 13,500 13,433 12,745 12,698 12,664
8.000 14,927 14,578 14,498 13,664 13,607 13,566
8.250 16,156 15,730 15,633 14,628 14,560 14,511
8.500 17,505 16,962 16,845 15,642 15,560 15,501
8.750 18,296 18,148 16,706 16,609 16,539
9.000 19,565 17,826 17,711 17,628
9.250 19,004 18,868 18,770
9.500 20,245 20,085 19,969
9.750 21,552 21,365 21,230
10.000 22,930 22,712 22,555
10.250 24,385 24,132 23,948
10.500 25,924 25,628 25,416
10.750 27,567 27,210 26,962
11.000 29,331 28,899 28,600
11.250 30,710 30,348

6. Orifice 20 24 30
Diameter
(in) 18.814 19.000 19.250 22.626 23.000 23.250 28.628 29.000 29.250
2.000 801.40 801.35 801.29
2.125 905.11 905.06 904.98
2.250 1,015.2 1,015.1 1,015.0
2.375 1,131.6 1,131.5 1,131.4 1,130.2 1,130.1 1,130.0
2.500 1,254.4 1,254.3 1,254.2 1,252.8 1,252.6 1,252.6
2.625 1,383.6 1,383.5 1,383.3 1,381.7 1,381.5 1,381.4
2.750 1,519.1 1,519.0 1,518.8 1,517.0 1,516.8 1,516.7
2.875 1,661.0 1,660.9 1,660.7 1,658 6 1,658.4 1,658.3 1,656.0
3.000 1,809.4 1,809.2 1,809.0 1,806 6 1,806.4 1,806.2 1,803.7 1,803.5 1,803.4
3.125 1,964.1 1,963.9 1,963.7 1,961 0 1,960.7 1,960.6 1,957.7 1,957.5 1,957.4
3.250 2,125.3 2,125 1 2,124.8 2,121.7 2,121.5 2,121.3 2,118.0 2,117.9 2,117.7
3.375 2,292.9 2,292.6 2,292.3 2,280.9 2,288.6 2,288.4 2,284.8 2,284.5 2,284.4
3.500 2,466.9 2,466.6 2,466.3 2,462.4 2,462 1 2,461.8 2,457.8 2,457.6 2,457.5
3.625 2,647 3 2,647.0 2,646.6 2,642.4 2,642.0 2,641.7 2,637.3 2,637.0 2,636.8
3.750 2,834 ? 2,833.9 2,833.5 2,828.7 2,828.3 2,828.0 2,823.1 2,822.8 2,822.6
3.875 3,027.5 3,027.3 3,026.8 3,021.5 3,021.0 3,020.7 3,015.2 3,014.9 3,014.7
4.000 3,227.5 3,227.1 3,226.5 3,220.6 3,220.1 3,219.8 3,213.8 3,213.5 3,213.2
4.250 3,646.7 3,646.2 3,645.6 3,638.3 3,637.7 3,637.2 3,630.1 3,629.7 3,629.4
4.500 4,092.1 4,091.5 4,090.6 4,081.8 4,081.0 4,080.5 4,071.9 4,071.4 4,071.1
4.750 4,563.7 4,562.9 4,561.9 4,551.1 4,550.1 4,549.5 4,539.4 4,538.8 4,538.4
5.000 5,061.8 5,060.8 5,050.6 5,046.4 5,045.2 5,044.5 5,032.5 5,031.8 5,031.4
5.250 5,586.6 5,585.4 5,583.8 5,567.7 5,566.4 5,565 5 5,551.3 5,550.5 5,550.0
5.500 6,138.2 6,136.7 6,134.8 6,115.3 6,113.6 6,112.6 6,095.8 6,094.9 6,094.4
5.750 6,717.0 6,715.2 6,712.3 6,689.1 6,687.2 6,685.9 6,666.2 6,665.2 6,664.5
6.000 7,323.4 7,321.1 7,318.2 7,289.4 7,287.1 7,285.6 7,262.5 7,261.3 7,260.5
6.250 7,957 5 7,954.7 7,951.2 7,916.4 7,913.6 7,911.9 7,864.7 7,883.4 7,882.5
6.500 8,620.0 8,616.5 8,612? 8,570.2 8,566.9 8,564.8 8,533.0 8,531.4 8,530.4
6.750 9,311.1 9,306.9 9,301.6 9,251.1 9,247.2 9,244.7 9,207.4 9,205.6 9,204.4
7.000 10,031 10,026 10,020 9,959.3 9,954.6 9,951.7 9,908.0 9,905.9 9,904.6
7.250 10,782 10,776 10,768 10,695 10,669 10,686 10,635 10,633 10,631
7.500 11,562 11,555 11,546 11,459 11,452 11,448 11,388 11,386 11,384
7.750 12,374 12,365 12,354 12,250 12,243 12,238 12,168 12,165 12,163
8.000 13,218 13,207 13,194 13,071 13,062 13,056 12,975 12,971 12,969
8.250 14,095 14,082 14,066 13,920 13,910 13,903 13,809 13,805 13,802
8.500 15,005 14,990 14,971 14,799 14,787 14,779 14,669 14,665 14,661

7. Orifice 20 24 30
Diameter
(in) 18.814 19.000 19.250 22.626 23.000 23.250 28.628 29.000 29.250
8.750 15,950 15,933 15,911 15,708 15,693 15,684 15,557 15,552 15,548
9.000 16,932 16,911 16,885 16,648 16,630 16,620 16,473 16,466 16,462
9.250 17,950 17,926 17,895 17,618 17,596 17,585 17,416 17,409 17,404
9.500 19,007 18,979 18,943 18,620 18,597 18,582 18,387 18,379 18,373
9.750 20,104 20,071 20,030 19,655 19,628 19,611 19,386 19,377 19,371
10.000 21,243 21,205 21,157 20,723 20,692 20,672 20,414 20,403 20,396
10.250 22,426 22,332 22,326 21,825 21,789 21,767 21,471 21,458 21,450
10.500 23,654 23,603 23,538 22,926 22,921 22,895 22,556 22,542 22,533
10.750 24,931 24,672 24,797 24,134 24,087 24,058 23,672 23,656 23,646
11.000 26,257 26,190 26,104 25,344 25,290 25,257 24,817 24,799 24,787
11.250 27,636 27,559 27,460 26,592 26,531 26,492 25,992 25,972 25,959
11.500 29,070 28,982 28,870 27,878 27,809 27,766 27,199 27,176 27,161
11.750 30,562 30,462 30,334 29,205 29,126 29,077 28,437 28,411 28,394
32,116 32,001 31,856 30,574 30,485 30,429
12.000 29,706 29,677 29,659
35,417 35,270 35,084 33,444 33,330 33,259
12.500 32,343 32,306 32,283
39,003 38,817 38,581 36,502 36,357 36,267
13.000 35,114 35,068 35,039
42,913 42,673 42,375 39,762 39,581 39,467
13.500 38,025 37,968 37,932
47,244 46,921 46,523 43,241 43,015 42,874
14.000 41,082 41,012 40,968
14.500 46,958 46,679 46,505 44,291 44,206 44,151
15.000 50,934 50,591 50,378 47,622 47,557 47,490
15.500 55,192 54,774 54,513 51,202 51,075 50,993
16.000 59,759 59,251 58,935 54,923 54,769 54,671
16.500 64,701 64,060 63,670 58,835 58,649 58,531
17.000 69,288 68,792 62,950 62,728 62,586
17.500 67,282 67,017 66,848
18,000 71,844 71,530 71,330
18.500 76,653 76,282 76,046
19.000 81,725 81,289 81,012
19.500 87,079 86,568 86,244
20.000 92,734 92,140 91,761
20.500 98,728 98,025 97,564
21.000 105,130 104,280 103,750
21.500 110,980 110,340

8. Table C-2 "f>" Values for Reynolds Number Factor F, Determination-
Flange Taps
Pipe Sizes—Nominal and Published Inside Diameters, in
Orifice 2 3 4
Diameter
(in) 1.689 1.939 2.067 2.3 2.626 2.9 3.068 3.152 3.438
0.250 0.0879 0.0911 0.0926 0.0950 0.0979 0.0999 0.1010 0.1014 0.1030
0.375 0.0677 0.0709 0.0726 0.0755 0.0792 0.0820 0.0836 0.0844 0.0867
0.500 0.0562 0.0576 0.0588 0.0612 0.0648 0.0677 0.0695 0.0703 0.0728
0.625 0.0520 0.0505 0.0506 0.0516 0.0541 0.0566 0.0583 0.0591 0.0618
0.750 0.0536 0.0485 0.0471 0.0462 0.0470 0.0486 0.0498 0.0504 0.0528
0.875 0.0595 0.0506 0.0478 0.0445 0.0429 0.0433 0.0438 0.0442 0.0460
1.000 0.0677 0.0559 0.0515 0.0458 0.0416 0.0403 0.0402 0.0403 0.0411
1.125 0.0762 0.0630 0.0574 0.0495 0.0427 0.0396 0.0386 0.0383 0.0380
1.250 0.0824 0.0707 0.0646 0.0550 0.0456 0.0408 0.0388 0.0381 0.0365
1.375 0.0772 0.0715 0.0614 0.0501 0.0435 0.0406 0.0394 0.0365
1.500 0.0773 0.0679 0.0554 0.0474 0.0436 0.0420 0.0378
1.625 0.0735 0.0613 0.0522 0.0477 0.0457 0.0402
1.750 0.0669 0.0575 0.0524 0.0500 0.0434
1.875 0.0717 0.0628 0.0574 0.0549 0.0473
2.000 0.0676 0.0624 0.0598 0.0517
2.125 0.0715 0.0669 0.0642 0.0563
2.250 0.0706 0.0685 0.0607
2.375 0.0648
2.500 0.0683

9. Orifice 4 6 8
Diameter
(in) 3.826 4.026 4.897 5.189 5.761 6.065 7.625 7.981 8.071
0.250 0.1047 0.1054
0.375 0.0894 0.0907
0.500 0.0763 0.0779 0.0836 0.0852 0.0880 0.0892
0.625 0.0653 0.0670 0.0734 0.0753 0.0785 0.0801
0.750 0.0561 0.0578 0.0645 0.0665 0.0701 0.0718
0.875 0.0487 0.0502 0.0567 0.0587 0.0625 0.0643 0.0723 0.0738 0.0742
1.000 0.0430 0.0442 0.0500 0.0520 0.0557 0.0576 0.0660 0.0676 0.0680
1.125 0.0388 0.0396 0.0444 0.0462 0.0498 0.0517 0.0602 0.0517 0.0623
1.250 0.0361 0.0364 0.0399 0.0414 0.0447 0.0464 0.0549 0.0566 0.0571
1.375 0.0347 0.0344 0.0363 0.0375 0.0403 0.0419 0.0518 0.0518 0.0523
1.500 0.0345 0.0336 0.0336 0.0344 0.0367 0.0381 0.0457 0.0474 0.0479
1.625 0.0354 0.0338 0.0318 0.0322 0.0337 0.0348 0.0418 0.0435 0.0439
1.750 0.0372 0.0350 0.0307 0.0306 0.0314 0.0322 0.0383 0.0399 0.0403
1.875 0.0398 0.0370 0.0305 0.0298 0.0298 0.0303 0.0353 0.0366 0.0371
2.000 0.0430 0.0395 0.0308 0.0296 0.0287 0.0288 0.0327 0.0340 0.0343
2.125 0.0467 0.0427 0.0318 0.0300 0.0281 0.0278 0.0304 0.0315 0.0318
2.250 0.0507 0.0462 0.0334 0.0310 0.0281 0.0274 0.0286 0.0295 0.0297
2.375 0.0548 0.0501 0.0354 0.0324 0.0286 0.0274 0.0271 0.0278 0.0280
2.500 0.0589 0.0540 0.0378 0.0342 0.0295 0.0279 0.0259 0.0264 0.0265
2.625 0.0626 0.0579 0.0406 0.0365 0.0308 0.0287 0.0251 0.0253 0.0254
2.750 0.0659 0.0615 0.0436 0.0391 0.0324 0.0300 0.0246 0.0245 0.0245
2.875 0.0647 0.0468 0.0418 0.0343 0.0314 0.0244 0.0240 0.0240
3.000 0.0673 0.0500 0.0448 0.0366 0.0332 0.0245 0.0238 0.0237
3.125 0.0533 0.0479 0.0389 0.0353 0.0248 0.0239 0.0237
3.250 0.0564 0.0510 0.0416 0.0375 0.0254 0.0242 0.0240
3.375 0.0594 0.0541 0.0443 0.0400 0.0263 0.0248 0.0244
3.500 0.0620 0.0569 0.0472 0.0426 0.0273 0.0255 0.0251
3.625 0.0643 0.0597 0.0500 0.0452 0.0286 0.0265 0.0260
3.750 0.0621 0.0527 0.0479 0.0300 0.0274 0.0271
3.875 0.0640 0.0553 0.0505 0.0316 0.0289 0.0283
4.000 0.0578 0.0531 0.0334 0.0304 0.0297
4.250 0.0620 0.0579 0.0372 0.0338 0.0330
4.500 0.0618 0.0414 0.0386 0.0366

10. Orifice 4 6 8
Diameter
(in) 3.826 4.026 4.897 5.189 5.761 6.065 7.625 7.981 8.071
4.750 0.0457 0.0416 0.0405
5.000 0.0500 0.0457 0.0446
5.250 0.0539 0.0497 0.0487
5.500 0.0574 0.0535 0.0524
5.750 0.0569 0.0559
6.000 0.0588
Orifice 10 12 16
Diameter-
(in) 9.564 10.02 10.136 11.376 11.938 12.09 14.688 15 15.25
1 0.0738
1.125 0.0685 0.0701 0.0705
1.25 0.0635 0.0652 0.0656 0.0698 0.0714 0.0718
1.375 0.0588 0.0606 0.061 0.0654 0.0671 0.676
1.5 0.0545 0.0563 0.0568 0.0612 0.0631 0.0635 0.0706 0.0713
1.625 0.0504 0.0523 0.0527 0.0573 0.0592 0.0597 0.067 0.0678 0.0684
1.75 0.0467 0.0485 0.049 0.0536 0.0555 0.056 0.0636 0.0644 0.065
1.875 0.0433 0.0451 0.0455 0.0501 0.0521 0.0526 0.0604 0.0612 0.0618
2 0.0401 0.0419 0.0414 0.0469 0.0488 0.0492 0.0572 0.0581 0.0587
2.125 0.0372 0.0389 0.0383 0.0438 0.0458 0.0463 0.0542 0.0551 0.0558
2.25 0.0346 0.0362 0.0356 0.041 0.0429 0.0434 0.0514 0.0523 0.0529
2.375 0.0322 0.0337 0.033 0.0383 0.0402 0.0407 0.0467 0.0496 0.0502
2.5 0.0302 0.0315 0.0308 0.0359 0.0377 0.0382 0.0461 0.047 0.0476
2.625 0.0283 0.0296 0.0287 0.0336 0.0354 0.0358 0.0436 0.0445 0.0452
2.75 0.0267 0.0278 0.0269 0.0316 0.0332 0.0336 0.0413 0.0422 0.0428
2.875 0.0254 0.0263 0.0253 0.0297 0.0312 0.0317 0.0391 0.0399 0.0406
3 0.0243 0.025 0.0252 0.0278 0.0294 0.0298 0.037 0.0378 0.0385
3.125 0.0234 0.0239 0.0241 0.0264 0.0278 0.0282 0.035 0.0358 0.0365
3.25 0.0226 0.023 0.0231 0.0251 0.0263 0.0266 0.0331 0.0339 0.0346
3.375 0.0221 0.0223 0.0224 0.0239 0.025 0.0253 0.0314 0.0321 0.0328
3.5 0.0219 0.0218 0.0218 0.0229 0.0238 0.0241 0.0298 0.0305 0.0311
3.625 0.0218 0.0214 0.0214 0.0221 0.0226 0.023 0.0282 0.029 0.0295
3.75 0.0218 0.0213 0.0212 0.0214 0.0219 0.0221 0.0268 0.0275 0.0281
3.875 0.0221 0.213 0.0211 0.0208 0.0212 0.0213 0.0255 0.0262 0.0267
4 0.0225 0.0214 0.0212 0.0204 0.0206 0.0207 0.0243 0.0249 0.0254

11. Orifice 10 12 16
Diameter
(in) 9.564 10.02 10.136 11.376 11.938 12.09 14.688 15 15.25
4.25 0.0238 0.0222 0.0219 0.02 0.0198 0.0198 0.0223 0.0228 0.0232
4.5 0.0256 0.0236 0.0231 0.0201 0.0195 0.0194 0.0206 0.021 0.0213
4.75 0.0279 0.0254 0.0249 0.0207 0.0196 0.0194 0.0193 0.0196 0.0198
5 0.0307 0.0277 0.027 0.0217 0.0202 0.0199 0.0184 0.0185 0.0187
5.25 0.0337 0.0303 0.0295 0.0231 0.0212 0.0208 0.0178 0.0178 0.0179
5.5 0.037 0.0332 0.0323 0.0249 0.0226 0.0221 0.0176 0.0174 0.0174
5.75 0.0404 0.0363 0.0354 0.027 0.0243 0.0237 0.0176 0.0174 0.0172
6 0.0438 0.396 0.0386 0.0294 0.0263 0.0255 0.018 0.0176 0.0173
6.25 0.0473 0.0437 0.0418 0.032 0.0285 0.0277 0.0186 0.016 0.0177
6.5 0.0505 0.0462 0.0451 0.0347 0.0309 0.03 0.0195 0.0188 0.0183
6.75 0.0536 0.0493 0.0483 0.0376 0.0335 0.0325 0.0206 0.0198 0.0192
7 0.0562 0.0523 0.0513 0.0406 0.0362 0.0351 0.022 0.021 0.0202
7.25 0.055 0.054 0.0435 0.039 0.0379 0.0235 0.0224 0.0216
7.5 0.0572 0.0564 0.0463 0.0418 0.0407 0.0252 0.024 0.023
7.75 0.0491 0.0446 0.0434 0.0271 0.0257 0.0246
8 0.0517 0.0473 0.0461 0.0291 0.0276 0.0264
8.25 0.054 0.0498 0.0487 0.0312 0.0296 0.0288
8.5 0.056 0.0522 0.0511 0.0334 0.0317 0.0303
8.75 0.0543 0.0534 0.0357 0.0338 0.0324
9 0.0533 0.038 0.0361 0.0346
9.25 0.0402 0.0383 0.0368
9.5 0.0425 0.0406 0.039
9.75 0.0447 0.0427 0.0412
10 0.0469 0.0449 0.0434
10.25 0.0489 0.047 0.0455
10.5 0.0508 0.049 0.0475
10.75 0.0526 0.0509 0.0495
11 0.0541 0.0526 0.0513
11.25 0.0541 0.0528

12. Orifice 20 24 30
Diameter
(in) 18.814 19 19.25 22.626 23 23.25 28.628 29 29.25
2 0.0667 0.0671 0.0676
2.125 0.064 0.0644 0.0649
2.25 0.0614 0.0618 0.0622
2.375 0.0588 0.0592 0.0597 0.0659 0.0665 0.0669
2.5 0.0563 0.0568 0.0573 0.0636 0.0642 0.0646
2.625 0.054 0.0544 0.0549 0.0614 0.062 0.0624
2.75 0.0517 0.0521 0.0526 0.0592 0.0599 0.0603
2.875 0.0494 0.0499 0.0504 0.0571 0.0578 0.0582 0.0662
3 0.0473 0.0477 0.0483 0.0551 0.0557 0.0562 0.0644 0.0649 0.0652
3.125 0.0452 0.0457 0.0462 0.0531 0.0538 0.0542 0.0626 0.0631 0.0634
3.25 0.0433 0.0437 0.0442 0.0511 0.052 0.0523 0.0608 0.0613 0.0616
3.375 0.0414 0.0418 0.0423 0.0493 0.05 0.0504 0.059 0.0596 0.0599
3.5 0.0395 0.0399 0.0405 0.0474 0.0481 0.0486 0.0574 0.0579 0.0582
3.625 0.0378 0.0382 0.0387 0.0457 0.0464 0.0468 0.0557 0.0562 0.0566
3.75 0.0361 0.0365 0.037 0.044 0.0447 0.0451 0.0541 0.0546 0.055
3.875 0.0345 0.0349 0.0354 0.0423 0.043 0.0435 0.0525 0.53 0.0534
4 0.0329 0.0333 0.0339 0.0407 0.0414 0.0419 0.0509 0.0515 0.0518
4.25 0.0301 0.0304 0.031 0.0376 0.0384 0.0388 0.0479 0.0485 0.0488
4.5 0.0275 0.0279 0.0283 0.0348 0.0355 0.036 0.045 0.0456 0.046
4.75 0.0252 0.0256 0.026 0.0322 0.0328 0.0333 0.0423 0.0429 0.0433
5 0.0232 0.0235 0.0239 0.0297 0.0304 0.0308 0.0397 0.0403 0.0407
5.25 0.0214 0.0217 0.022 0.0275 0.0281 0.0285 0.0373 0.0378 0.0382
5.5 0.0199 0.0201 0.0204 0.0254 0.026 0.0264 0.0349 0.0355 0.0359
5.75 0.0186 0.0188 0.0191 0.0236 0.0241 0.0245 0.0327 0.0333 0.0337
6 0.0176 0.0177 0.0179 0.0219 0.0224 0.0228 0.0306 0.0312 0.0316
6.25 0.0167 0.0168 0.017 0.0204 0.0208 0.0212 0.0287 0.0292 0.0296
6.5 0.0161 0.0162 0.0163 0.0191 0.0195 0.0198 0.0269 0.0274 0.0277
6.75 0.0157 0.0157 0.0157 0.0179 0.0183 0.0185 0.0252 0.0257 0.026
7 0.0155 0.0155 0.0154 0.0169 0.0172 0.0174 0.0236 0.024 0.0244
7.25 0.0155 0.0154 0.0153 0.0161 0.0163 0.0165 0.0221 0.0226 0.0229
7.5 0.0157 0.0155 0.0154 0.0154 0.0156 0.0157 0.0208 0.0212 0.0215
7.75 0.016 0.0158 0.0156 0.0148 0.015 0.0151 0.0195 0.019 0.0202
8 0.0166 0.0163 0.016 0.0144 0.0145 0.0146 0.0184 0.0187 0.019

13. Orifice 20 24 30
Diameter
(in) 18.814 19 19.25 22.626 23 23.25 28.628 29 29.25
8.25 0.0172 0.0169 0.0165 0.0142 0.0142 0.0142 0.0174 0.0177 0.0179
8.5 0.018 0.0177 0.0172 0.0141 0.014 0.014 0.0164 0.0168 0.017
8.75 0.019 0.0186 0.018 0.0141 0.014 0.0139 0.0156 0.0159 0.0161
9 0.0201 0.0196 0.019 0.0143 0.0141 0.014 0.0149 0.0152 0.0153
9.25 0.0213 0.0208 0.0201 0.0146 0.0143 0.0141 0.0143 0.0145 0.0146
9.5 0.0226 0.022 0.0213 0.015 0.0146 0.0144 0.0138 0.0139 0.0141
9.75 0.024 0.0234 0.0226 0.0155 0.015 0.0147 0.0133 0.0135 0.0136
10 0.0256 0.0249 0.024 0.0161 0.0155 0.0152 0.013 0.0131 0.0132
10.25 0.0271 0.0264 0.0255 0.0168 0.0162 0.0158 0.0128 0.0128 0.0128
10.5 0.0288 0.028 0.027 0.0176 0.0169 0.0164 0.0126 0.0126 0.0126
10.75 0.0305 0.0297 0.0286 0.0185 0.0176 0.0172 0.0125 0.0125 0.0125
11 0.0322 0.0314 0.0303 0.0194 0.0186 0.0181 0.0125 0.0124 0.0124
11.25 0.034 0.0332 0.032 0.0205 0.0196 0.019 0.0126 0.0125 0.0124
11.5 0.0358 0.0349 0.0338 0.0216 0.0207 0.02 0.0128 0.0126 0.0125
11.75 0.0376 0.0367 0.0355 0.0228 0.0218 0.0211 0.013 0.0128 0.0127
12 0.0394 0.0385 0.0373 0.0241 0.023 0.0223 0.0134 0.0131 0.0129
12.5 0.0429 0.042 0.0408 0.0267 0.0255 0.0248 0.0142 0.0138 0.0136
13 0.0463 0.0454 0.0442 0.0296 0.0282 0.0274 0.0153 0.0148 0.0145
13.5 0.0494 0.0485 0.0474 0.0326 0.0311 0.0302 0.0166 0.016 0.0157
14 0.052 0.0512 0.0502 0.0356 0.0341 0.0331 0.0182 0.0175 0.0171
14.5 0.0386 0.037 0.036 0.0199 0.0192 0.0187
15 0.0415 0.04 0.039 0.0218 0.0209 0.0204
15.5 0.0443 0.0426 0.0418 0.0239 0.023 0.0224
16 0.047 0.0455 0.0446 0.026 0.025 0.0244
16.5 0.0494 0.048 0.0471 0.0283 0.0273 0.0266
17 0.0503 0.0494 0.0307 0.0296 0.0288
17.5 0.0331 0.0319 0.0312
18 0.0355 0.0343 0.0335
18.5 0.0379 0.0366 0.0358
19 0.0402 0.039 0.0382
19.5 0.0424 0.0412 0.0404
20 0.0446 0.0434 0.0426
20.5 0.0466 0.0455 0.0448
21 0.0485 0.0475 0.0467
21.5 0.0492 0.0485

14. Table C-3 Y1 Expansion Factors—Flange Taps (Static Pressure Taken from Upstream Taps)
K 0.1 0.2 0.3 0.4 0.45 0.50 0.52 0.54 0.56 0.58 0.60 0.61 0.62 0.63 0.64 0.65 0.66 0.67 0.68 0.69 0.7 0.71 0.72 0.73 0.74 0.75
0.0 1.0000 1.0000 1.0000 1.0000 1.0000 1.0000 1.0000 1.0000 1.0000 1.0000 1.0000 1.0000 1.0000 1.0000 1.0000 1.0000 1.0000 1.0000 1.0000 1.0000 1.0000 1.0000 1.0000 1.0000 1.0000 1.0000
0.1 0 9 8 0 9 8 0 9 8 0 9 8 0 9 8 0.9988 0 9 8 0 9 8 0 9 8 0.9988 0.9987 0 9 8 0.9987 0.9987 0 9 8 0 9 8 0 9 8 0 9 8 0 9 8 0 9 8 0.9986 0 9 8 0 9 8 0 9 8 0 9 8 0.9986
.99 .99 .99 .98 .98 .98 .98 .98 .97 .97 .97 .97 .97 .97 .96 .96 .96 .96 .96
0.2 0 9 7 0 9 7 0 9 7 0 9 7 0 9 7 0 9 7 0 9 7 0 9 7 0.9975 0.9975 0.9975 0 9 7 0 9 7 0 9 7 0 9 7 0 9 7 0 9 7 0.9973 0.9973 0.9973 0.9973 0.9972 0 9 7 0.9972 0.9971 0.9971
.97 .97 .97 .97 .96 .96 .96 .96 .95 .94 .94 .94 .94 .94 .92
0.3 0 9 6 0 9 6 0 9 6 0.9965 0.9965 0.9964 0.9964 0.9963 0.9963 0.9963 0.9962 0 9 6 0.9962 0.9961 0.9961 0.9961 0 9 6 0.996 0.996 0.9959 0.9959 0.9958 0.9958 0.9958 0.9957 0.9957
.96 .96 .96 .92 .9
0.4 0.9954 0.9954 0.9954 0.9953 0.9953 0.9952 0.9952 0.9951 0.9951 0.9950 0 9 4 0 9 4 0 9 4 0 9 4 0 9 4 0 9 4 0 9 4 0 9 4 0.9946 0 9 4 0.9945 0.9945 0 9 4 0.9943 0.9943 0.9942
.99 .99 .99 .98 .98 .98 .97 .97 .96 .94
0.5 0.9943 0 9 4 0.9943 0.9942 0.9941 0.9940 0 9 4 0.9939 0 9 3 0.9938 0.9937 0 9 3 0.9936 0.9935 0.9935 0 9 3 0 9 3 0.9933 0.9933 0.9932 0.9931 0.9931 0.993 0.9929 0.9929 0.9928
.93 .90 .98 .96 .94 .94
0.6 0.9932 0.9932 0.9931 0.9930 0.9929 0.9928 0.9927 0.9927 0.9926 0.9925 0.9924 0.9924 0.9923 0.9923 0.9922 0.9921 0.9921 0.992 0.9919 0.9918 0.9918 0.9917 0.9916 0.9915 0.9914 0.9913
0.7 0.9920 0.9920 0.9920 0.9919 0.9918 0.9916 0.9915 0.9915 0.9914 0.9913 0.9912 0.9911 0.9910 0.9910 0 9 0 0 9 0 0 9 0 0 9 0 0.9906 0.9905 0 9 0 0.9903 0.9902 0.9901
.99 .98 .97 .97 .94 0.99 0.9899
0.8 0 9 0 0.9909 0 9 0 0.9907 0 9 0 0.9904 0 9 0 0.9902 0.9901 0 9 0 0.9899 0 9 9 0.9897 0.9897 0 9 9 0.9895 0 9 9 0.9893 0.9892 0.9891 0.989 0 9 8 0 9 8 0 9 8 0.9886 0 9 8
.99 .98 .96 .93 .90 .88 .86 .84 .89 .88 .87 .84
0.9 0.9898 0 9 9 0.9897 0.9895 0 9 9 0.9892 0.9891 0.9890 0 9 8 0 9 8 0 9 8 0.9885 0.9885 0 9 8 0.9883 0 9 8 0.9881 0 9 8 0 9 7 0 9 7 0 9 7 0.9875 0 9 7 0 9 7 0.9871 0.987
.87 .84 .89 .88 .86 .84 .82 .8 .89 .88 .87 .84 .83
1.0 0 9 8 0 9 8 0.9885 0.9884 0.9882 0.9880 0.9879 0.9878 0 9 7 0.9875 0 9 7 0.9873 0.9872 0.9871 0 9 7 0 9 6 0 9 6 0.9867 0.9865 0 9 6 0.9863 0.9861 0 9 6 0.9859 0.9857 0.9855
.86 .86 .87 .84 .8 .89 .88 .84 .8
1.1 0.9875 0.9875 0.9874 0.9872 0 9 7 0.9868 0 9 6 0 9 6 0 9 6 0.9863 0.9861 0.9860 0.9859 0.9858 0.9857 0.9856 0 9 5 0.9853 0.9852 0.9851 0 9 4 0 9 4 0 9 4 0 9 4 0.9843 0.9841
.80 .87 .86 .84 .84 .89 .88 .86 .84
1.2 0.9863 0.9863 0.9862 0.9860 0.9859 0.9856 0.9855 0.9853 0.9852 0.9850 0 9 4 0 9 4 0 9 4 0.9845 0 9 4 0 9 4 0.9841 0 9 4 0.9838 0.9837 0.9835 0 9 3 0.9832 0.983 0.9828 0.9826
.88 .87 .86 .84 .83 .8 .84
1.3 0.9852 0.9852 0.9851 0 9 4 0 9 4 0 9 4 0.9843 0.9841 0.9840 0.9838 0.9836 0.9835 0.9833 0.9832 0.9831 0.9829 0.9828 0.9827 0.9825 0.9823 0.9822 0.982 0.9818 0.9816 0.9814 0.9812
.89 .87 .84
1.4 0.9841 0 9 4 0.9840 0.9837 0.9835 0.9832 0.9831 0.9829 0.9827 0.9825 0.9823 0.9822 0.9821 0.9819 0.9818 0.9816 0.9815 0.9813 0.9812 0.981 0.9808 0 9 0 0 9 0 0.9802 0.98 0.9798
.80 .86 .84
1.5 0 9 2 0.9829 0.9828 0.9826 0.9823 0.9820 0.9819 0.9817 0.9815 0.9813 0.9810 0.9809 0.9808 0 9 0 0.9805 0.9803 0.9802 0.98 0 9 9 0.9796 0 9 9 0.9792 0 9 9 0.9788 0.9786 0.9783
.89 .86 .78 .74 .7
1.6 0.9818 0.9818 0.9817 0.9814 0.9811 0 9 0 0.9806 0.9805 0.9803 0.9800 0.9798 0 9 9 0.9795 0.9793 0.9792 0 9 9 0 9 8 0 9 8 0.9785 0 9 8 0.9781 0.9778 0 9 7 0 9 7 0.9771 0.9769
.88 .76 .7 .78 .77 .73 .76 .74
1.7 0 9 0 0 9 0 0.9805 0.9802 0.9800 0.9796 0.9794 0.9792 0.9790 0.9788 0.9785 0 9 8 0.9782 0.9780 0 9 7 0 9 7 0 9 7 0.9773 0.9771 0 9 6 0 9 6 0.9764 0 9 6 0 9 6 0.9757 0.9754
.86 .86 .74 .79 .77 .75 .79 .77 .72 .7
1.8 0.9795 0.9795 0.9794 0.9791 0 9 8 0 9 8 0.9782 0 9 8 0 9 7 0.9775 0 9 7 0.9771 0 9 6 0.9768 0 9 6 0 9 6 0.9762 0 9 6 0.9758 0.9755 0.9753 0.9751 0 9 4 0 9 4 0.9743 0.974
.78 .74 .70 .78 .72 .79 .76 .74 .7 .78 .75

15. K 0.1 0.2 0.3 0.4 0.45 0.50 0.52 0.54 0.56 0.58 0.60 0.61 0.62 0.63 0.64 0.65 0.66 0.67 0.68 0.69 0.7 0.71 0.72 0.73 0.74 0.75
1.9 0 9 8 0.9783 0 9 8 0 9 7 0 9 7 0.9772 0 9 7 0 9 6 0 9 6 0 9 6 0.9760 0 9 5 0.9756 0.9755 0.9753 0.9751 0 9 4 0 9 4 0 9 4 0 9 4 0 9 3 0.9737 0 9 3 0.9731 0 9 2 0.9725
.74 .72 .79 .76 .70 .78 .76 .73 .78 .79 .77 .74 .72 .79 .74 .78
2.0 0.9772 0.9772 0.9771 0.9767 0.9764 0.9760 0.9758 0.9756 0.9753 0.9750 0.9747 0.9745 0 9 4 0.9742 0.974 0.9738 0.9735 0.9733 0.9731 0.9728 0.9726 0.9723 0.972 0.9717 0.9714 0.9711
.74
2.1 0.9761 0.9761 0.9759 0.9756 0.9753 0 9 4 0 9 4 0 9 4 0.9741 0.9738 0.9734 0.9733 0.9731 0.9729 0.9727 0.9725 0.9722 0.972 0.9717 0.9715 0.9712 0.9709 0 9 0 0.9703 0.97
.78 .76 .74 .76 0.9696
2.2 0.9750 0 9 4 0 9 4 0 9 4 0.9741 0.9736 0 9 3 0.9731 0.9729 0.9725 0.9722 0 9 2 0.9718 0.9716 0.9714 0.9711 0.9709 0 9 0 0.9704 0.9701 0.9698 0.9659 0.9692 0 9 8 0.9685 0.9682
.79 .78 .74 .74 .70 .76 .69
2.3 0.9738 0.9738 0.9736 0.9732 0.9729 0 9 2 0.9722 0.9719 0.9716 0.9713 0 9 0 0.9707 0.9705 0.9703 0.9701 0.9698 0.9696 0.9693 0 9 9 0 9 8 0.9685 0.9681 0 9 7 0.9675 0.9671 0.9667
.74 .79 .6 .68 .68
2.4 0.9727 0.9726 0.9725 0.9721 0.9717 0.9712 0.9710 0 9 0 0 9 0 0 9 0 0.9697 0.9694 0.9692 0.9690 0 9 8 0 9 8 0.9683 0.968 0.9677 0 9 7 0.9671 0 9 6 0.9664 0.9661 0.9657 0.9653
.77 .74 .70 .68 .65 .64 .68
2.5 0.9715 0.9715 0.9713 0.9709 0.9705 0.9700 0.9698 0.9695 0.9692 0 9 8 0.9684 0.9682 0.9680 0 9 7 0.9675 0 9 7 0.9669 0.9666 0.9663 0 9 6 0.9657 0.9654 0.965 0 9 4 0 9 4 0.9639
.68 .67 .62 .6 .66 .63
2.6 0 9 0 0 9 0 0.9702 0.9698 0.9694 0 9 8 0 9 8 0.9683 0 9 7 0.9675 0.9671 0.9669 0.9667 0.9664 0.9662 0.9659 0.9656 0.9653 0.965 0 9 4 0.9643 0.964 0 9 3 0.9632 0.9628 0.9624
.74 .74 .68 .66 .69 .67 .66
2.7 0.9693 0.9692 0.9691 0.9686 0.9682 0.9676 0.9673 0 9 7 0 9 6 0.9663 0.9659 0.9656 0.9654 0.9651 0 9 4 0.9646 0 9 4 0.964 0.9637 0.9633 0.963 0.9626 0.9622 0.9618 0.9614 0.961
.60 .67 .69 .63
2.8 0 9 8 0 9 8 0 9 7 0 9 7 0 9 7 0 9 6 0.9661 0 9 5 0 9 5 0 9 5 0 9 4 0 9 4 0.9641 0 9 3 0 9 3 0 9 3 0 9 3 0 9 2 0 9 2 0 9 2 0.9616 0.9612 0 9 0 0 9 0 0 9 0.9595
.61 .61 .69 .64 .60 .64 .68 .64 .60 .66 .64 .68 .66 .63 .6 .66 .63 .6 .68 .64 .6
2.9 0 9 7 0.9669 0 9 6 0.9663 0.9658 0.9652 0.9649 0.9646 0.9642 0 9 3 0.9633 0.9631 0.9628 0.9625 0.9623 0.962 0.9616 0.9613 0.961 0 9 0 0.9602 0.9598 0.9594 0.959 0.9585 0.9581
.60 .68 .68 .66
3.0 0.9658 0.9658 0.9656 0.9651 0.9647 0 9 4 0.9637 0 9 3 0.9630 0.9626 0.9621 0.9618 0.9615 0.9613 0.961 0 9 0 0.9603 0.96
.60 .64 .66 0.9596 0.9592 0.9588 0.9584 0.958 0 9 7 0.9571 0.9566
.56
3.1 0.9647 0 9 4 0 9 4 0.9639 0.9635 0.9628 0.9625 0.9622 0.9617 0.9613 0 9 0 0.9605 0.9603 0.96
.67 .65 .68 0.9597 0.9593 0 9 9 0.9586 0.9583 0.9579 0.9575 0.9571 0.9566 0.9562 0.9557 0.9552
.5
3.2 0.9636 0.9635 0 9 3 0.9628 0 9 2 0.9616 0.9613 0 9 0 0.9605 0.9601 0.9595 0.9593 0.959 0.9587 0 9 8 0.958 0.9577 0.9573 0.9569 0.9565 0.9561 0.9557 0.9552 0.9547 0.9542 0.9537
.63 .63 .69 .54
3.3 0.9624 0.9624 0.9622 0.9616 0.9611 0 9 0 0.9601 0.9597 0.9593 0.9588 0.9583 0.958 0 9 7 0.9574 0.9571 0.9567 0.9564 0.956 0.9556 0.9552 0.9547 0.9543 0.9538 0.9533 0.9528 0.9523
.64 .57
3.4 0.9613 0.9612 0.961 0 9 0 0.9599 0.9592 0.9589 0.9585 0.958 0 9 7 0.957 0.9567 0.9564 0.9561 0.9558 0.9554 0.955 0 9 4 0.9542 0.9538 0.9534 0.9529 0.9524 0.9519 0.9514 0.9508
.64 .56 .56
3.5 0 9 0 0.9601 0.9599 0.9593 0.9588 0.958 0 9 7 0.9573 0.9568 0.9563 0.9558 0.9554 0.9551 0 9 4 0.9545 0.9541 0.9537 0.9533 0.9529 0.9524 0.952 0.9515 0.951 0.9505 0.95
.62 .57 .58 099
.44
3.6 0.959 0.959 0.9587 0.9581 0.9576 0.9568 0.9565 0 9 6 0.9556 0.9551 0.9545 0.9542 0.9538 0.9535 0.9532 0.9528 0.9524 0.952 0.9515 0.9511 0.9506 0.9501 0 9 9 0.9491 0 9 8 0 9 8
.5 .46 .45 .4
3.7 0.9579 0.9578 0.9576 0.957 0.9561 0.9556 0.9553 0 9 4 0.9543 0.9538 0.9532 0.9529 0.9526 0.9522 0.9518 0.9515 0.9511 0 9 0 0.9502 0.9497 0.9492 0 9 8 0 9 8 0 9 7 0.9471 0.9465
.58 .56 .47 .42 .47
3.8 0.9567 0.9567 0.9564 0.9558 0.9552 0 9 4 0.954 0.9536 0.9531 0.9526 0.952 0.9516 0.9513 0.9509 0.9505 0.9502 0 9 9 0 9 9 0.9488 0 9 8 0.9479 0 9 7 0 9 6 0 9 6 0.9457 0.9451
.54 .47 .43 .44 .44 .48 .43
3.9 0.9556 0.9555 0.9533 0.9546 0.954 0.9532 0.9528 0.9524 0.9519 0.9513 0.9507 0.9504 0.95 0 9 9 0.9492 0 9 8 0 9 8 0 9 8 0.9475 0 9 7 0.9465 0 9 6 0.9454 0 9 4 0.9442 0.9436
.46 .48 .44 .4 .4 .4 .48
4 0.9545 0 9 4 0.9542 0.9535 0.9529 0.952 0.9516 0.9512 0 9 0 0.9501 0 9 9 0.9491 0 9 8 0.9483 0 9 7 0 9 7 0.9471 0.9465 0 9 6 0 9 5 0.9451 0 9 4 0 9 4 0 9 3 0 9 2 0.9422
.54 .56 .44 .47 .49 .45 .42 .47 .46 .4 .44 .48

16. Table C-4 Y2 Expansion Factors—Flange Taps (Static Pressure Taken from Downstream Taps)
K 0.1 0.2 0.3 0.40 0.45 0.50 0.52 0.54 0.56 0.58 0.60 0.61 0.62 0.63 0.64 0.65 0.66 0.67 0.68 0.69 0.7 0.71 0.72 0.73 0.74 0.75
P
f2
0.0 1.0000 1.0000 1.0000 1.0000 1.0000 1.0000 1.0000 1.0000 1.0000 1.0000 1.0000 1.0000 1.0000 1.0000 1.0000 1.0000 1.0000 1.0000 1.0000 1.0000 1.0000 1.0000 1.0000 1.0000 1.0000 1.0000
0.1 1.0007 1.0007 1.0006 1.0006 1.0006 1.0006 1.0006 1.0006 1.0006 1.0006 1.0005 1.0005 1.0005 1.0005 1.0005 1.0005 1.0005 1.0005 1.0004 1.0004 1.0004 1.0004 1.0004 1.0004 1.0004 1.0004
0.2 1.0013 1.0013 1.0013 1.0013 1.0012 1.0012 1.0012 1.0012 1.0011 1.0011 1.0011 1.0011 1.0010 1.0010 1.001 1.001 1.001 1.0009 1.0009 1.0009 1.0009 1.0008 1.0008 1.0008 1.0008 1.0007
0.3 1.0020 1.0020 1.0020 1.0019 1.0019 1.0018 1.0018 1.0018 1.0017 1.0017 1.0016 1.0016 1.0016 1.0015 1.0015 1.0015 1.0014 1.0014 1.0014 1.0013 1.0013 1.0013 1.0012 1.0012 1.0011 1.0011
0.4 1.0027 1.0027 1.0026 1.0026 1.0025 1.0024 1.0024 1.0023 1.0023 1.0022 1.0022 1.0021 1.0021 1.0021 1.002 1.002 1.0019 1.0019 1.0018 1.0018 1.0017 1.0017 1.0016 1.0016 1.0015 1.0014
0.5 1.0033 1.0033 1.0033 1.0032 1.0031 1.0030 1.0030 1.0029 1.0029 1.0028 1.0027 1.0027 1.0026 1.0026 1.0025 1.0025 1.0024 1.0024 1.0023 1.0022 1.0022 1.0021 1.002 1.002 1.0019 1.0018
0.6 1.0040 1.0040 1.0040 1.0039 1.0038 1.0036 1.0036 1.0035 1.0034 1.0034 1.0033 1.0032 1.0032 1.0031 1.003 1.003 1.0029 1.0028 1.0028 1.0027 1.0026 1.0025 1.0025 1.0024 1.0023 1.0022
0.7 1.0047 1.0047 1.0046 1.0045 1.0044 1.0043 1.0042 1.0041 1.0040 1.0039 1.0038 1.0038 1.0037 1.0036 1.0036 1.0035 1.0034 1.0033 1.0032 1.0032 1.0031 1.003 1.0029 1.0028 1.0027 1.0026
0.8 1.0054 1.0053 1.0053 1.0052 1.0050 1.0049 1.0048 1.0047 1.0046 1.0045 1.0044 1.0043 1.0042 1.0042 1.0041 1.004 1.0039 1.0038 1.0037 1.0036 1.0035 1.0034 1.0033 1.0032 1.003 1.0029
0.9 1.0060 1.0060 1.0060 1.0058 1.0057 1.0055 1.0054 1.0053 1.0052 1.0050 1.0049 1.0048 1.0048 1.0047 1.0046 1.0045 1.0044 1.0043 1.0042 1.0041 1.004 1.0038 1.0037 1.0036 1.0034 1.0033
1.0 1.0067 1.0067 1.0066 1.0065 1.0063 1.0061 1.0060 1.0059 1.0058 1.0056 1.0055 1.0054 1.0053 1.0052 1.0051 1.005 1.0049 1.0048 1.0047 1.0045 1.0044 1.0043 1.0041 1.004 1.0038 1.0037
1.1 1.0074 1.0074 1.0073 1.0071 1.0069 1.0067 1.0066 1.0065 1.0063 1.0062 1.0060 1.0059 1.0058 1.0057 1.0056 1.0055 1.0054 1.0053 1.0051 1.005 1.0049 1.0047 1.0046 1.0044 1.0042 1.0041
1.2 1.0080 1.0080 1.0080 1.0078 1.0076 1.0073 1.0072 1.0071 1.0069 1.0068 1.0066 1.0065 1.0064 1.0062 1.0061 1.006 1.0059 1.0058 1.0056 1.0055 1.0053 1.0052 1.005 1.0048 1.0046 1.0044
1.3 1.0087 1.0087 1.0086 1.0084 1.0082 1.0080 1.0078 1.0077 1.0075 1.0073 1.0071 1.0070 1.0069 1.0068 1.0066 1.0065 1.0064 1.0062 1.0061 1.0059 1.0058 1.0056 1.0054 1.0052 1.005 1.0048
1.4 1.0094 1.0094 1.0093 1.0091 1.0089 1.0086 1.0084 1.0083 1.0081 1.0079 1.0077 1.0076 1.0074 1.0073 1.0072 1.007 1.0069 1.0067 1.0066 1.0064 1.0062 1.006 1.0058 1.0056 1.0054 1.0052
1.5 1.0101 1.0101 1.0100 1.0097 1.0095 1.0092 1.0090 1.0089 1.0087 1.0085 1.0082 1.0081 1.0080 1.0078 1.0077 1.0076 1.0074 1.0072 1.007 1.0069 1.0067 1.0065 1.0063 1.006 1.0058 1.0056
1.6 1.0108 1.0107 1.0106 1.0104 1.0101 1.0098 1.0096 1.0095 1.0093 1.0090 1.0088 1.0087 1.0085 1.0084 1.0082 1.0081 1.0079 1.0077 1.0075 1.0073 1.0071 1.0069 1.0067 1.0065 1.0062 1.006
1.7 1.0114 1.0114 1.0113 1.0110 1.0108 1.0104 1.0103 1.0101 1.0099 1.0096 1.0094 1.0092 1.0091 1.0089 1.0088 1.0086 1.0084 1.0082 1.008 1.0078 1.0076 1.0074 1.0071 1.0069 1.0066 1.0064
1.8 1.0121 1.0121 1.0120 1.0117 1.0114 1.0111 1.0109 1.0107 1.0104 1.0102 1.0099 1.0098 1.0096 1.0094 1.0093 1.0091 1.0089 1.0087 1.0085 1.0083 1.008 1.0078 1.0076 1.0073 1.007 1.0068
1.9 1.0128 1.0128 1.0126 1.0123 1.0121 1.0117 1.0115 1.0113 1.0110 1.0108 1.0105 1.0103 1.0102 1.0100 1.0098 1.0096 1.0094 1.0092 1.009 1.0088 1.0085 1.0083 1.008 1.0077 1.0074 1.0071

17. K 0.1 0.2 0.3 0.40 0.45 0.50 0.52 0.54 0.56 0.58 0.60 0.61 0.62 0.63 0.64 0.65 0.74 0.75
P
0.66 0.67 0.68 0.69 0.7 0.71 0.72 0.73
f2
2.0 1.0135 1.0134 1.0133 1.0130 1.0127 1.0123 1.0121 1.0119 1.0116 1.0114 1.0110 1.0109 1.0107 1.0105 1.0103 1.0101 1.0099 1.0097 1.0095 1.0092 1.009 1.0087 1.0084 1.0081 1.0078 1.0075
2.1 1.0142 1.0141 1.0140 1.0136 1.0134 1.0129 1.0127 1.0125 1.0122 1.0119 1.0116 1.0114 1.0112 1.0111 1.0109 1.0106 1.0104 1.0102 1.01 1.0097 1.0094 1.0092 1.0089 1.0086 1.0083 1.0079
2.2 1.0148 1.0148 1.0147 1.0143 1.0140 1.0136 1.0133 1.0131 1.0128 1.0125 1.0122 1.0120 1.0118 1.0116 1.0114 1.0112 1.0109 1.0107 1.0104 1.0102 1.0099 1.0096 1.0093 1.009 1.0087 1.0083
2.3 1.0155 1.0155 1.0154 1.0150 1.0146 1.0142 1.0140 1.0137 1.0134 1.0131 1.0127 1.0126 1.0124 1.0121 1.0119 1.0117 1.0114 1.0112 1.0109 1.0106 1.0104 1.0101 1.0098 1.0094 1.0091 1.0087
2.4 1.0162 1.0162 1.0160 1.0156 1.0153 1.0148 1.0146 1.0143 1.0140 1.0137 1.0133 1.0131 1.0129 1.0127 1.0124 1.0122 1.012 1.0117 1.0114 1.0111 1.0108 1.0105 1.0102 1.0098 1.0095 1.0091
2.5 1.0169 1.0168 1.0167 1.0163 1.0159 1.0154 1.0152 1.0149 1.0146 1.0142 1.0139 1.0137 1.0134 1.0132 1.013 1.0127 1.0125 1.0122 1.0119 1.0116 1.0113 1.011 1.0106 1.0103 1.0099 1.0095
2.6 1.0176 1.0175 1.0174 1.0170 1.0166 1.0161 1.0158 1.0155 1.0152 1.0148 1.0144 1.0142 1.0140 1.0138 1.0135 1.0133 1.013 1.0127 1.0124 1.0121 1.0118 1.0114 1.0111 1.0107 1.0103 1.0099
2.7 1.0182 1.0182 1.0180 1.0176 1.0172 1.0167 1.0164 1.0161 1.0158 1.0154 1.0150 1.0148 1.0146 1.0143 1.014 1.0138 1.0135 1.0132 1.0129 1.0126 1.0122 1.0119 1.0115 1.0111 1.0107 1.0103
2.8 1.0189 1.0189 1.0187 1.0183 1.0179 1.0173 1.0170 1.0167 1.0164 1.0160 1.0156 1.0154 1.0151 1.0148 1.0146 1.0143 1.014 1.0137 1.0134 1.0131 1.0127 1.0124 1.012 1.0116 1.0112 1.0107
2.9 1.0196 1.0196 1.0194 1.0189 1.0185 1.0180 1.0177 1.0173 1.0170 1.0166 1.0162 1.0159 1.0157 1.0154 1.0151 1.0148 1.0145 1.0142 1.0139 1.0136 1.0132 1.0128 1.0124 1.012 1.0116 1.0111
3.0 1.0203 1.0203 1.0201 1.0196 1.0192 1.0186 1.0183 1.0180 1.0176 1.0172 1.0167 1.0165 1.0162 1.0160 1.0157 1.0154 1.015 1.0147 1.0144 1.014 1.0137 1.0133 1.0129 1.0124 1.012 1.0116
3.1 1.0210 1.0210 1.0208 1.0203 1.0198 1.0192 1.0189 1.0186 1.0182 1.0178 1.0173 1.0170 1.0168 1.0165 1.0162 1.0159 1.0156 1.0152 1.0149 1.0145 1.0141 1.0137 1.0133 1.0129 1.0124 1.012
3.2 1.0217 1.0216 1.0214 1.0209 1.0205 1.0198 1.0195 1.0192 1.0188 1.0184 1.0179 1.0176 1.0173 1.0170 1.0167 1.0164 1.0161 1.0158 1.0154 1.015 1.0146 1.0142 1.0138 1.0133 1.0128 1.0124
3.3 1.0224 1.0223 1.0221 1.0216 1.0211 1.0205 1.0202 1.0198 1.0194 1.0189 1.0184 1.0182 1.0179 1.0176 1.0173 1.0175 1.0171 1.0168 1.0164 1.016 1.0156 1.0151 1.0147 1.0142 1.0137 1.0132
3.4 1.0230 1.0230 1.0228 1.0223 1.0218 1.0211 1.0208 1.0204 1.0200 1.0195 1.0190 1.0187 1.0184 1.0181 1.0178 1.0175 1.0171 1.0168 1.0164 1.016 1.0156 1.0151 1.0147 1.0142 1.0137 1.0132
3.5 1.0237 1.0237 1.0235 1.0229 1.0224 1.0217 1.0214 1.0210 1.0216 1.0201 1.0196 1.0193 1.0910 1.0187 1.0184 1.018 1.0177 1.0173 1.0169 1.0165 1.016 1.0156 1.0151 1.0146 1.0141 1.0136
3.6 1.0244 1.0244 1.0242 1.0236 1.0231 1.0224 1.0220 1.0216 1.0212 1.0207 1.0202 1.0199 1.0196 1.0192 1.0189 1.0186 1.0182 1.0178 1.0174 1.017 1.0165 1.0161 1.0156 1.0151 1.0146 1.014
3.7 1.0251 1.0251 1.0248 1.0243 1.0237 1.0230 1.0226 1.0222 1.0218 1.0213 1.0207 1.0204 1.0201 1.0198 1.0195 1.0191 1.0187 1.0183 1.0179 1.0175 1.017 1.0165 1.016 1.0155 1.015 1.0144
3.8 1.0258 1.0258 1.0255 10249 1.0244 1.0236 1.0233 1.0229 1.0224 1.0219 1.0213 1.0210 1.0207 1.0204 1.02 1.0196 1.0192 1.0188 1.0184 1.018 1.0175 1.017 1.0165 1.016 1.0154 1.0148
3.9 1.0265 1.0264 1.0262 1.0256 1.0250 1.0243 1.0239 1.0235 1.0230 1.0225 1.0219 1.0216 1.0213 1.0209 1.0206 1.0202 1.0198 1.0194 1.0189 1.0185 1.018 1.0175 1.017 1.0164 1.0159 1.0153
4.0 1.0272 1.0271 1.0269 1.0263 1.0257 1.0249 1.0245 1.0241 1.0236 1.0231 1.0225 1.0222 1.0218 1.0215 1.0211 1.0207 1.0203 1.0199 1.0194 1.019 1.0185 1.018 1.0174 1.0169 1.0163 1.0157

18. Table C-5 Ym Expansion Factors—Flange Taps (Static Pressure Mean of Upstream and Downstream)
P
D
K 0.1 0.2 0.3 0.40 0.45 0.50 0.52 0.54 0.56 0.58 0.60 0.61 0.62 0.63 0.64 0.65 0.66 0.67 0.68 0.69 0.7 0.71 0.72 0.73 0.74 0.75
P
f2
0 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
0.1 0.9998 0.9998 0.9998 0 9 9 0.9997 0.9997 0.9997 0 9 9 0.9997 0.9996 0.9996 0.9996 0.9996 0 9 9 0.9996 0.9996 0.9996 0.9996 0.9996 0.9995 0.9995 0.9995 0.9995 0.9995 0.9995 0.9994
.97 .97 .96
0.2 0.9995 0.9995 0 9 9 0.9995 0 9 9 0 9 9 0 9 9 0 9 9 0.9993 0.9993 0 9 9 0.9993 0.9992 0.9992 0.9992 0.9992 0.9992 0.9991 0.9991 0.9991 0.9991 0.999 0.999 0 9 9 0.9989 0 9 8
.95 .94 .94 .94 .94 .93 .9 .99
0.3 0.9993 0.9993 0.9993 0.9992 0.9992 0.9991 0.9991 0.9990 0.9990 0 9 9 0 9 8 0.9989 0.9989 0.9988 0.9988 0.9988 0 9 8 0 9 8 0.9987 0.9986 0 9 8 0.9986 0.9985 0.9985 0 9 8 0.9984
.90 .99 .97 .97 .96 .94
0.4 0.9991 0.9990 0.9990 0 9 9 0.9989 0.9988 0.9988 0 9 8 0.9987 0 9 8 0 9 8 0.9985 0.9985 0 9 8 0 9 8 0 9 8 0.9983 0.9983 0.9982 0.9982 0.9981 0.9981 0.998 0 9 8 0 9 7 0.9978
.90 .97 .96 .96 .94 .94 .94 .9 .99
0.5 0 9 8 0.9988 0.9988 0.9987 0.9986 0.9985 0.9985 0 9 8 0.9984 0.9983 0.9982 0.9982 0.9981 0.9981 0 9 8 0.998 0.9979 0.9979 0.9978 0.9977 0 9 7 0.9976 0.9975 0.9975 0 9 7 0.9973
.98 .94 .90 .97 .94
0.6 0.9986 0.9986 0.9986 0.9984 0.9984 0.9982 0.9982 0.9981 0.9980 0.9979 0.9978 0.9978 0 9 7 0 9 7 0.9976 0 9 7 0.9975 0.9974 0 9 7 0.9973 0.9972 0.9971 0.997 0.997 0.9969 0.9968
.97 .97 .96 .94
0.7 0 9 8 0 9 8 0 9 8 0.9982 0.9981 0.9980 0 9 7 0 9 7 0 9 7 0 9 7 0.9975 0 9 7 0 9 7 0 9 7 0 9 7 0 9 7 0.9971 0.997 0 9 6 0 9 6 0 9 6 0 9 6 0 9 6 0 9 6 0 9 6 0.9962
.94 .94 .93 .99 .98 .97 .96 .94 .94 .93 .92 .92 .99 .98 .98 .96 .96 .94 .94
0.8 0.9982 0.9981 0.9981 0.9980 0.9978 0.9977 0 9 7 0.9975 0.9974 0.9973 0.9971 0.9971 0.9970 0.9969 0 9 6 0.9968 0 9 6 0 9 6 0.9965 0 9 6 0.9963 0.9962 0.9961 0.996 0.9958 0.9957
.96 .98 .97 .96 .94
0.9 0.9979 0 9 7 0.9978 0.9977 0.9976 0.9974 0.9973 0.9972 0.9971 0.9969 0.9968 0.9967 0.9966 0.9966 0.9965 0 9 6 0.9963 0.9962 0.9961 0.996 0.9958 0.9957 0.9956 0.9955 0.9953 0.9952
.99 .94
1.0 0 9 7 0.9977 0 9 7 0 9 7 0.9973 0.9971 0 9 7 0.9969 0.9968 0.9966 0 9 6 0.9964 0.9963 0.9962 0.9961 0 9 6 0.9959 0.9958 0.9956 0.9955 0.9954 0.9952 0.9951 0.995 0 9 4 0 9 4
.97 .96 .94 .90 .94 .9 .98 .96
1.1 0.9975 0.9975 0.9974 0.9972 0.9970 0.9968 0 9 6 0.9966 0.9964 0.9963 0.9961 0.9960 0.9959 0.9958 0.9957 0.9956 0.9955 0.9953 0.9952 0.9951 0 9 4 0 9 4 0 9 4 0.9945 0.9943 0.9941
.97 .99 .98 .96
1.2 0.9972 0.9972 0.9972 0.9970 0 9 6 0 9 6 0 9 6 0 9 6 0.9961 0 9 5 0.9958 0.9956 0.9955 0.9954 0.9953 0.9952 0.9951 0 9 4 0 9 4 0 9 4 0 9 4 0.9943 0 9 4 0 9 4 0 9 3 0.9936
.98 .95 .94 .93 .99 .99 .98 .96 .95 .92 .9 .98
1.3 0.9970 0.9970 0.9969 0.9967 0.9965 0.9962 0.9961 0 9 6 0.9958 0.9956 0.9954 0.9953 0.9952 0.9951 0.9949 0 9 4 0 9 4 0.9945 0 9 4 0 9 4 0.994 0.9939 0.9937 0.9935 0.9933 0.9931
.90 .98 .97 .94 .92
1.4 0 9 6 0.9968 0.9967 0.9965 0.9963 0.9960 0.9958 0.9957 0.9955 0.9952 0.9951 0.9950 0.9948 0 9 4 0 9 4 0 9 4 0.9943 0.9941 0.9939 0.9938 0.9936 0 9 3 0.9932 0.993 0 9 2 0.9926
.98 .97 .96 .94 .94 .98
1.5 0.9966 0 9 6 0.9965 0.9962 0.9960 0.9957 0.9955 0.9954 0.9952 0.9950 0 9 4 0.9946 0.9945 0 9 4 0.9942 0.994 0.9939 0.9937 0.9935 0.9933 0.9931 0.9929 0.9927 0.9925 0.9923 0.992
.96 .96 .93
1.6 0.9964 0 9 6 0.9962 0.9960 0.9957 0.9954 0.9952 0.9951 0 9 4 0 9 4 0 9 4 0.9942 0.9941 0.9940 0.9938 0.9936 0.9935 0.9933 0.9931 0.9929 0.9927 0.9925 0.9922 0.992 0.9918 0.9915
.94 .99 .96 .94
1.7 0.9962 0.9961 0.9960 0.9957 0.9955 0.9951 0.9950 0.9948 0 9 4 0 9 4 0 9 4 0.9939 0.9938 0.9936 0.9934 0.9932 0.9931 0.9929 0.9927 0.9925 0.9922 0.992 0.9918 0.9915 0.9913 0.991
.96 .93 .90
1.8 0.9959 0.9959 0.9958 0.9955 0.9952 0.9949 0 9 4 0.9945 0 9 4 0 9 4
.97 . 9 2 . 9 0 0.9937 0.9936 0 9 3 0.9932 0.993 0.9929 0.9927 0.9925 0.9923 0.992 0.9918 0.9916 0.9913 0.991 0 9 0 0.9905
.94 .98

19. K 0.1 0.2 0.3 0.40 0.45 0.50 0.52 0.54 0.56 0.58 0.60 0.61 0.62 0.63 0.64 0.65 0.66 0.67 0.68 0.69 0.7 0.71 0.72 0.73 0.74 0.75
P
f2
1.9 0.9957 0.9957 0.9956 0.9953 0.9950 0 9 4 0 9 4 0.9942 0.9939 0.9937 0.9934 0.9932 0.9930 0.9929 0.9927 0.9925 0.9923 0.9921 0.9918 0.9916 0.9914 0.9911 0.9908 0 9 0 0 9 0 0.99
.96 .94 .96 .93
2.0 0.9955 0.9955 0.9954 0.9950 0 9 4 0.9943 0.9941 0.9939 0.9936 0 9 3 0.9930 0 9 2 0.9927 0.9925 0.9923 0.9921 0.9919 0.9917 0.9914 0.9912 0 9 0 0.9907 0 9 0 0.9901 0.9898 0.9895
.97 .94 .99 .99 .94
2.1 0.9953 0.9953 0.9951 0 9 4 0.9945 0 9 4 0.9938 0.9936 0.9933 0.9930 0.9927 0.9925 0.9923 0.9922 0.9919 0.9917 0.9915 0.9913 0.991 0.9908 0.9905 0.9902 0 9 9 0 9 9 0.9893 0 9 9
.98 .90 .89 .86 .8
2.2 0.9951 0.9951 0 9 4 0 9 4 0.9942 0.9938 0 9 3 0.9933 0.9930 0.9927 0.9924 0.9922 0.9920 0.9918 0.9916 0.9914 0.9911 0 9 0 0 9 0 0.9903 0.9901 0.9898 0.9895 0.9891 0 9 8 0.9885
.99 .96 .96 .99 .96 .88
2.3 0 9 4 0 9 4 0 9 4 0 9 4 0 9 4 0.9935 0.9933 0.9930 0 9 2 0 9 2 0.9920 0.9918 0.9916 0.9914 0.9912 0.991 0 9 0 0.9905 0.9902 0.9899 0 9 9 0 9 9 0 9 9 0 9 8 0.9883 0.9988
.99 .98 .97 .93 .90 .97 .94 .97 .86 .83 .8 .87
2.4 0 9 4 0 9 4 0 9 4 0.9941 0.9937 0.9932 0.9930 0.9927 0.9924 0.9921 0.9917 0.9915 0.9913 0.9911 0 9 0 0 9 0 0 9 0 0.9901 0.9898 0.9895 0.9892 0 9 8 0 9 8 0.9882 0.9878 0.9874
.97 .96 .95 .98 .96 .93 .89 .85
2.5 0.9945 0 9 4 0 9 4 0.9939 0.9935 0.9930 0.9927 0.9924 0.9921 0.9918 0.9914 0.9912 0.9910 0 9 0 0.9905 0.9902 0.99
.94 .93 .97 0.9897 0 9 9 0.9891 0 9 8 0 9 8 0.9881 0 9 7 0.9873 0.987
.84 .88 .84 .87
2.6 0.9943 0.9942 0.9941 0.9936 0.9932 0.9927 0.9924 0.9922 0.9918 0.9915 0.9911 0 9 0 0 9 0 0 9 0 0.9901 0.9898 0 9 9 0.9893 0.989 0.9887 0.9883 0 9 8 0 9 7 0.9872 0.9868 0.9864
.98 .96 .94 .86 .8 .86
2.7 0 9 4 0 9 4 0.9938 0.9934 0.9930 0.9924 0.9922 0.9919 0.9915 0.9912 0.9907 0.9905 0.9903 0 9 0 0.9898 0 9 9 0.9892 0.9889 0 9 8 0.9882 0 9 7 0.9875 0.9872 0.9868 0 9 6 0.986
.90 .90 .90 .85 .86 .89 .84
2.8 0 9 3 0 9 3 0 9 3 0.9932 0 9 2 0 9 2 0.9919 0.9916 0.9912 0 9 0 0 9 0 0 9 0 0 9 9 0 9 9 0 9 9 0.9891 0 9 8 0 9 8 0 9 8 0 9 7 0.9875 0.9871 0 9 6 0.9863 0 9 5 0 9 5
.98 .98 .96 .98 .92 .98 .94 .92 .89 .87 .84 .88 .85 .82 .88 .87 .89 .84
2.9 0.9936 0.9936 0.9934 0 9 2 0.9925 0.9919 0.9916 0.9913 0.9910 0.9905 0.9901 0 9 9 0.9896 0.9893 0 9 9 0 9 8 0 9 8 0.9881 0 9 7 0 9 7 0 9 7 0.9867 0.9863 0.9858 0.9854 0.985
.99 .88 .8 .87 .84 .88 .84 .8
3.0 0.9934 0.9934 0.9932 0.9927 0.9923 0.9917 0.9914 0.9910 0 9 0 0.9902 0 9 9 0.9895 0.9892 0 9 9 0 9 8 0 9 8 0.9881 0.9877 0 9 7 0.987 0 9 6 0.9862 0.9858 0.9854 0 9 4 0 9 4
.96 .88 .80 .87 .84 .84 .86 .89 .85
3.1 0.9932 0.9932 0.9930 0.9925 0.9920 0.9914 0.9911 0 9 0 0 9 0 0.9899 0 9 9 0.9892 0 9 8 0 9 8 0.9883 0.988 0 9 7 0.9873 0 9 7 0 9 6 0.9862 0.9858 0.9854 0 9 4 0 9 4 0.984
.98 .94 .84 .89 .86 .87 .8 .86 .89 .84
3.2 0.9930 0.9930 0.9928 0.9923 0.9918 0.9912 0 9 0 0 9 0 0.9901 0 9 9 0.9891 0 9 8 0 9 8 0.9883 0.988 0 9 7 0 9 7 0 9 7 0 9 6 0.9862 0.9858 0.9854 0 9 4 0.9845 0 9 4 0.9835
.98 .95 .86 .89 .86 .86 .83 .8 .86 .89 .8
3.3 0.9928 0.9928 0.9926 0.9920 0.9916 0 9 0 0 9 0 0.9902 0.9898 0.9893 0 9 8 0.9885 0.9882 0.9879 0 9 7 0 9 7 0 9 6 0 9 6 0.9862 0.9858 0.9854 0 9 4 0.9845 0.984 0.9835 0.983
.99 .96 .88 .86 .83 .89 .86 .89
3.4 0.9926 0.9926 0.9924 0.9918 0.9913 0 9 0 0.9903 0 9 9 0.9895 0.9890 0.9885 0 9 8 0 9 7 0 9 7 0.9873 0 9 6 0 9 6 0.9862 0.9858 0 9 5 0 9 5 0.9845 0 9 4 0.9835 0.983 0.9825
.96 .89 .82 .89 .86 .89 .86 .84 .8 .8
3.5 0.9924 0 9 2 0.9922 0.9916 0.9911 0 9 0 0 9 0 0.9896 0 9 9 0.9887 0.9882 0 9 7 0 9 7 0.9872 0 9 6 0 9 6 0.9862 0 9 5 0.9854 0.985 0 9 4 0.9841 0.9836 0.9831 0.9826 0.982
.94 .94 .90 .82 .89 .86 .89 .86 .88 .85
3.6 0.9922 0.9922 0.992 0.9914 0 9 0 0.9901 0.9898 0 9 9 0 9 8 0 9 8 0 9 7 0.9876 0.9872 0 9 6 0.9866 0 9 6 0.9858 0.9854 0.985 0.9846 0.9841 0.9836 0.9831 0 9 2 0.9821 0.9815
.99 .84 .89 .84 .89 .89 .82 .86
3.7 0.9921 0.992 0.9918 0.9912 0 9 0 0.9899 0.9895 0.9891 0 9 8 0.9881 0 9 7 0.9872 0 9 6 0 9 6 0 9 6 0.9858 0.9855 0.985 0 9 4 0 9 4 0.9837 0.9832 0 9 2 0.9822 0.9816 0.981
.96 .86 .86 .89 .86 .82 .86 .82 .87
3.8 0.9919 0.9918 0.9916 0.991 0 9 0 0.9896 0.9893 0 9 8 0 9 8 0.9878 0.9872 0 9 6 0.9866 0 9 6 0.9859 0.9855 0.9851 0.9847 0.9842 0.9838 0.9833 0.9828 0.9823 0.9817 0.9812 0.9806
.94 .88 .84 .89 .82
3.9 0.9917 0.9916 0.9914 0 9 0 0 9 0 0 9 9 0 9 9 0 9 8 0.9881 0 9 7 0 9 6 0 9 6 0 9 6 0 9 5 0.9855 0.9851 0 9 4 0 9 4 0 9 3 0 9 3 0 9 2 0 9 2 0.9818 0.9813 0 9 0 0.9801
.97 .92 .84 .8 .86 .85 .89 .86 .83 .89 .87 .83 .88 .84 .89 .84 .87
4 0.9915 0.9914 0.9912 0.9905 0.9899 0.9891 0.9887 0 9 8 0 9 7 0.9872 0.9866 0.9863 0.9859 0 9 5 0.9852 0 9 4 0 9 4 0.9839 0.9835 0 9 3 0.9825 0.9819 0.9814 0 9 0 0.9802 0 9 9
.83 .88 .86 .88 .84 .8 .88 .76

20. Table C-6 Fb Basic Orifice Factors—Pipe Taps
Basic temperature = 60 0F
Flowing temperature = 60 0F
Base pressure = 14.73 psia
Specific gravity = 1.0
Pipe Sizes—Nominal and Published Inside Diameters, in
Orifice 2 3 4
Diameter
(in) 1.689 1.939 2.067 2.300 2.626 2.900 3,068 3.152 3.430
0.250 12.850 12.813 12.800 12.782 12.765 12.753 12.748 12.745 12.737
0.375 29.359 29.097 29.005 28.882 28.771 28.710 28.682 28.669 28.634
0.500 53.703 52.816 52.401 52.019 51.591 51.353 51.243 51.196 51.064
0.625 87.212 84.919 84.083 82.922 81.795 81.142 80.835 80.703 80.332
0.750 132.23 126.86 124.99 122.45 120.06 118.67 118.00 117.70 116.86
0.875 192.74 181.02 177.08 171.92 167.23 164.58 163.31 162.76 161.17
1.000 275.45 251.10 243.27 233.30 224.56 219.76 217.52 216.55 213.79
1.125 391.93 342.98 327.98 309.43 293.79 285.48 281.66 280.02 275.42
1.250 465.99 437.99 404.52 377.36 363.41 357.12 354.45 347.03
1.375 583.96 524.68 478.68 455.82 445.74 441.48 429.83
1.500 679.10 602.45 565.79 549.94 543.31 525.40
1.625 755.34 697.43 672.95 662.81 635.76
1.750 946.99 856.37 819.05 803.77 763.51
1.875 1,050.4 993.98 971.19 911.98
2.000 1,290.7 1,205.6 1,171.8 1,085.5
2.125 1,465.1 1,415.0 1,289.7
2.250 1,532.0
2.375 1,822.8

21. Orifice 4 6 8
Diameter
(in) 3.826 4.026 4.897 5.189 5.761 6.065 7.625 7.981 8.071
0.250 12.727 12.722
0.375 26.598 28.584
0.500 50.936 50.886 50.739 50.705 50.652 50.628
0.625 79.974 79.835 79.436 79.349 79.217 79.162
0.750 116.05 115.73 114.81 114.61 114.32 114.20
0.875 159.57 158,94 157.11 156.71 156.13 155.89 155.10 154.99 154.96
1.000 211.03 209.91 206.62 205.91 204.84 204.41 203.00 202.80 202.75
1.125 270.90 269.10 263.71 262.51 260.71 259.98 257.62 257.28 257.20
1.250 339.87 337.05 328.73 326.85 324.02 322.86 319.10 318.56 318.44
1.375 418.79 414.51 402.06 399.30 395.08 393.33 387.62 386.81 386.62
1.500 508.76 502.38 484.20 480.23 474.20 471.69 463.39 462.19 461.92
1.625 611.11 601.80 575.73 570.14 561.73 558.24 546.61 544.92 544.53
1.750 727.54 714.16 677.38 669.63 658.08 653.33 637.51 635.19 634.65
1.875 860.17 841.19 789.99 779.40 763.77 757.39 736.34 733.23 732.52
2.000 1,011.7 985.04 914.57 900.28 879.38 870.93 843.34 839.29 838.35
2.125 1,185.3 1,148.4 1,052.3 1,033.2 1,005.6 994.52 958.78 953.58 952.38
2.250 1,385.4 1,334.4 1,204.7 1,179.4 1,143.2 1,128.8 1,083.0 1,076.4 1,074.9
2.375 1,617.2 1,547.3 1,373.4 1,340.2 1,293.1 1,274.6 1,216.3 1,208.0 1,206.1
2.500 1,887.6 1,792.3 1,560.5 1,517.2 1,456.4 1,432.7 1,359.2 1,348.8 1,346.5
2.625 2,206.0 2,075,9 1,768.3 1,712.3 1,634.3 1,604.3 1,512.0 1,499.2 1,496.3
2.750 2,407.0 1,999.8 1,927.6 1,828.3 1,790.3 1,675.4 1,659.7 1,656.1
2.875 2,258.5 2,165,9 2,039.9 1,992.2 1,849.9 1,830.6 1,826.3
3.000 2,548.6 2,430.2 2,271.2 2,211.6 2,036.0 2,012.7 2,007.3
3.125 2,875.2 2,724.4 2,524.3 2,450.1 2,234.7 2,206.4 2,199.9
3.250 3,244.8 3,052.8 2,801.8 2,709.9 2,446.5 2,412.4 2,404.7
3.375 3,665.6 3,420.9 3,106.9 2,993.3 2,672.5 2,631.6 2,622.3
3.500 3,835.7 3,443.0 3,303.0 2,913.7 2,864.7 2,853.7
3.625 4,305.7 3,914.4 3,642.3 3,171.1 3,112.7 3,099.6
3.750 4,226.3 4,014.8 3,446.0 3,376.6 3,361.0
3.875 4,684.9 4,425.1 3,739.9 3,657.6 3,639.2
4.000 5,197.7 4,878.4 4,054.2 3,957.0 3,935.2
4.250 4,751.4 4,616.6 4,586.6
4.500 5,554.7 5,369.0 5,327.9
4.750 6,485.3 6,231.1 6,175.2
5.000 7,571.4 7,224.3 7,148.7
5.250 8,850.3 8,376.3 8,274.0
5.500 9,723.8 9,585.1

22. Orifice 10 12 18
Diameter
(in) 9.564 10.020 10.136 11.376 11.938 12.090 14.688 15.000 15.250
1.000 202.16
1.125 256.22 256.01 255.96
1.250 316.90 316.56 316.49 315.84 315.57 315.51
1.375 384.29 383.79 383.68 382.66 382.30 382.22
1.500 458.52 457.79 457.63 456.16 455.64 455.52 453.92 453.78
1.625 539.72 538.69 538.45 536.38 535.66 535.48 533.27 533.07 532.93
1.750 628.03 626.61 626.29 623.44 622.45 622.20 619.18 618.92 618.73
1.875 723.61 721.70 721.27 717.43 716.10 715.78 711.73 711.39 711.13
2.000 826.63 824.12 823.54 818.48 816.73 816.30 810.99 810.53 810.19
2.125 937.28 934.02 933.27 926.72 924.44 923.88 917.01 916.43 915.99
2.250 1,055.7 1,051.6 1,050.6 1,042.3 1,039.4 1,038.7 1,029.9 1,092.6 1,028.6
2.375 1,182.2 1,177.0 1,175.8 1,165.3 1,161.6 1,160.7 1,149.7 1,148.8 1,148.1
2.500 1,316.9 1,310.5 1,309.0 1,295.9 1,291.4 1,290.2 1.276.5 1.275.4 1,274.5
2.625 1,460.0 1,452.1 1,450.3 1,434.3 1,428.7 1,427.4 1,410.5 1,409.1 1,408.0
2.750 1,611.8 1,602.3 1,600.1 1,580.7 1,573.9 1,572.2 1,551.7 1,549.9 1,548.6
2.875 1,772.5 1,761.0 1,758.4 1,735.1 1,726.9 1,724.9 1,700.1 1,698.1 1,696.5
3.000 1,942.5 1,928.8 1,925.6 1,897.8 1,888.1 1,885.7 1,856.1 1,853.6 1,851.7
3.125 2,122.1 2,1057 2,102.0 2,069.0 2,057.5 2,054.7 2,019.5 2,016.6 2,014.3
3.250 2,311.6 2,292.2 2,287.8 2,248.9 2,235.4 2,232.1 2,190.7 2,187.2 2,184.5
3.375 2,511.5 2,488.6 2,483.4 2,437.7 2,421.8 2,418.0 2,369.6 2,365.5 2,362.4
3.500 2,722.3 2,695.3 2,689.1 2,635.6 2,617.2 2,612.6 2,556.5 2,551.7 2,548.1
3.625 2,944.3 2,912.7 2,905.5 2,843.0 2,821.6 2,816.3 2,751.4 2,745.9 2,741.7
3.750 3,178.1 3,141.2 3,132.7 3,060.2 3,035.3 3,029.3 2,954.5 2,948.1 2,943.3
3.875 3,424.3 3,381.3 3,371.5 3,287.4 3,258.7 3,251.7 3,165.9 3,158.6 3,153.1
4.000 3,683.5 3,633.5 3,622.1 3,524.9 3,492.0 3,483.9 3,385.8 3,377.5 3,371.2
4.250 4,243.8 4,176.8 4,161.6 4,032.8 3,989.5 3,979.0 3,851.6 3,840.9 3,832.8
4.500 4,865.1 4,776.2 4,756.1 4,587.1 4,530.8 4,517.2 4,353.4 4,339.8 4,329.6
4.750 5,554.9 5,437.9 5,411.5 5,191.5 5,119.0 5,119.0 4,892.9 4,875.8 4,862.9
5.000 6,322.2 6,169.2 6,134.9 5,850.6 5,757.8 5,757,8 5,471.9 5,450.5 5,434.3
5.250 7,177.7 6,978.9 6,934.4 6,569.4 6,451.5 6,451.5 6,092.5 6,065.9 6,045.9
5.500 8,134.1 7,877.2 7,820.0 7,354.1 7,205.1 7,205.1 6,757.0 6,724.1 6,699.4
5.750 9,207.0 8,876.3 8,803.1 8,211.4 8,024.2 8,024.2 7,468.0 7,427.6 7,397.4
6.000 10,415 9,991.2 9,897.8 9,149.5 8,915.4 8,915.4 8,228.5 8,179.2 8,142.3
6.250 11,783 11,240 11,121 10,178 9,886.1 9,886.1 9,041.6 8,981.7 8,937.0
6.500 13,340 12,644 12,492 11,307 10,945 10,945 9,911.2 9,838.7 9,764.7

23. Orifice 10 12 18
Diameter
(in) 9.564 10.020 10.136 11.376 11.938 12.090 14.688 15.000 15.250
6.750 14,230 14,038 12,550 12,103 12,103 10,841 10,754 10,689
7.000 16,035 15,790 13,923 13,923 13,371 11,837 11,732 11,654
7.250 15,442 14,762 14,604 12,902 12,777 12,684
7.500 17,131 16,294 16,101 14,044 13,894 13,783
7.750 19,017 17,986 17,750 15,268 15,090 14,959
8.000 19,861 19,572 16,583 16,371 16,216
8.250 21,947 21,593 17,996 17,746 17,561
8.500 19,517 19,221 19,003
8.750 21,156 20,807 20,551
9.000 22,926 22,515 22,214
9.250 24,841 24,356 24,003
9.500 26,917 26,346 25,932
9.750 29,172 28,501 28,014
10.000 31,629 30,839 30,268
10.250 34,315 33,383 32,713
10.500 36,160 35,372
Orifice 20 24 30
Diameter
(in) 18.814 19.000 19.250 22.626 23.000 23.250 28.628 29.000 29.250
2.000 806.71 806.57 806.40
2.125 911.51 911.35 911.13
2.250 1,022.9 1,022.7 1,022.4
2.375 1,141.0 1,140.7 1,140.4 1,136.8 1,136.5 1,136.3
2.500 1,265.7 1,265.4 1,265.0 1,260.6 1,260.2 1,259.9
2.625 1,397.2 1,396.8 1,396.3 1,390.9 1,390.5 1,390.2
2.750 1,535.5 1,535.0 1,534.4 1,527.9 1,527.3 1,527.0
2.875 1,680.7 1,680.1 1,679.3 1,671.5 1,670.9 1,670.4 1,663.8
3.000 1,832.7 1,832.1 1,831.2 1,821.9 1,821.1 1,820.6 1,812.7 1,812.3 1,812.0
3.125 1,991.8 1,991.0 1,990.0 1,978.9 1,978.0 1,977.4 1,968.1 1,967.7 1,967.4
3.250 2,158.0 2,157.0 2,155.8 2,142.8 2,141.7 2,141.0 2,130.2 2,129.6 2,129.3
3.375 2,331.3 2,330.2 2,328.7 2,313.5 2,312.3 2,311.5 2,298.8 2,298.2 2,297.7
3.500 2,511.9 2,510.6 2,508.8 2,491.2 2,489.7 2,488.8 2,474.1 2,473.3 2,472.9

24. Orifice 20 24 30
Diameter
(in) 18.814 19.000 19.250 22.626 23.000 23.250 28.628 29.000 29.250
3.625 2,699.7 2,698.2 2,696.2 2,675.8 2,674.0 2,673.0 2,656.0 2,655.2 2.654.6
3.750 2,895.0 2,893.2 2,890.9 2,867.4 2,865.4 2,864.1 2,844.6 2,843.7 2,843.0
3,875 3,097.7 3,095.7 3,093.0 3,066.0 3,063.8 3,062.3 3,040.0 3,038.9 3,038.2
4.000 3,308.0 3,305.7 3,302.7 3,271.8 3,269.2 3,267.6 3,242.2 3,240.9 3,240.1
4.250 3,751.6 3,748.7 3,744.8 3,705.0 3,701.7 3,699.6 3,666.9 3.665.3 3,664.3
4.500 4,226.8 4,223.0 4,218.1 4,167.6 4,163.4 4,160.7 4,119.3 4,117.3 4,116.0
4.750 4,734.1 4,729.4 4,723.3 4,660.0 4,654.8 4,651.4 4,599.6 4,597.1 4,595.4
5.000 5,274.6 5,268.7 5,261.1 5,183.0 5,176.4 5,172.3 5,108.2 5,105.0 5,103.0
5.250 5,849.0 5,841.9 5,832.6 5,737.1 5,729.1 5,723.9 5,645.4 5,641.4 5,639.1
5.500 6,458.6 6,449.9 6,438.7 6,322.9 6,313.2 6,307.0 6,211.8 6,207.2 6,204.2
5.750 7,104.4 7,094.0 7,080.4 6,941.3 6,929.7 6,922.2 6,807.7 6,802.1 6,798.5
6.000 7,787.9 7,775.4 7,759.1 7,592.8 7,579.0 7,570.1 7,433.6 7,426.9 7,422.6
6.250 8,510.4 8,495.4 8,476.0 8,278.3 8,262.0 8,251.5 8,089.9 8,082.0 8,076.9
6.500 9,273.4 9,255.6 9,232.5 8,998.8 8,979.5 8,967.1 8,777.2 8,768.0 8,761.9
6.750 10,079 10,058 10,030 9,755.0 9,732.4 9,717.9 9,496.0 9,485.2 9,478.1
7.000 10,928 10,903 10,871 10,548 10,522 10,505 10,247 10,234 10,226
7.250 11,823 11,794 11,756 11,379 11,348 11,329 11,030 11,016 11,006
7.500 12,767 12,733 12,689 12,249 12,214 12,191 11,847 11,830 11,819
7.750 13,762 13,722 13,670 13,160 13,119 13,093 12,697 12,678 12,665
8.000 14,810 14,763 14,703 14,113 14,065 14,035 13,582 13,560 13,546
8.250 15,914 15,860 15,791 15,109 15,054 15,020 14,501 14,477 14,461
8.500 17,078 17,015 16,935 16,150 16,087 16,048 15,457 15,429 15,411
8.750 18,305 18,232 18,129 17,237 17,166 17,121 16,450 16,418 16,397
9.000 19,598 19,515 19,408 18,373 18,292 18,241 17,480 17,444 17,421
9.250 20,963 20,866 20,743 19,560 19,468 19,409 18,548 18,508 18,482
9.500 22,402 22,292 22,151 20,800 20,695 20,628 19,656 19,611 19,582
9,750 23,923 23,796 23,634 22,094 21,976 21,900 20,805 20,754 20,721
10.000 25,529 25,384 25,198 23,447 23,312 23,227 21,995 21,938 21,901
10.250 27,227 27,061 26,849 24,859 24,708 24,612 23,228 23,165 23,124
10.500 29,023 28,834 28,592 26,335 26,164 26,056 24,505 24,434 24,358
10.750 30,925 30,709 30,434 27,878 27,685 27,563 25,827 25,749 25,698

25. Orifice 20 24 30
Diameter
(in) 18.814 19.000 19.250 22.626 23.000 23.250 28.628 29.000 29.250
11.000 32,940 32,694 32,381 29,490 29,273 29,136 27,196 27,109 27,052
11.250 35,078 34,798 34,443 31,175 30,932 30,779 28,613 28,156 28,453
11.500 37,348 37,030 36,626 32,938 32,666 32,494 30,080 29,972 29,903
11.750 39,761 39,400 38,941 34,783 34,478 34,285 31,598 31,479 31,402
12.000 42,330 41,920 41,399 36,714 36,373 36,158 33,169 33,038 32,953
12.500 47,991 47,461 46,790 40,855 40,429 40,161 36,478 36,318 36,215
13.000 54,463 53,778 52,914 45,406 44,877 44,544 40,024 39,829 39,704
13.500 50,420 49,763 49,352 43,823 43,589 43,437
14.000 55,959 55,147 54,638 47,898 47,615 47,433
14.500 62,099 61,094 60,468 52,271 51,932 51,714
15.000 68,929 67,687 66,915 56,967 56,562 56,301
15.500 76,562 75,025 74,074 62,017 61,533 61,223
16.000 83,231 82,055 67,453 66,878 66,509
16.500 73,314 72,630 72,193
17.000 79,641 78,831 78,313
17.500 86,485 85,525 84,913
18.000 93,900 92,765 92,042
18.500 101,950 100,610 99,758
19.000 110,720 109,130 108,130
19.500 120,300 118,420 117,230
20.000 130,780 128,560 127,150

26. Table C-7 "b" Values for Reynolds Number Factor F r Determination—
Pipe Taps
Pipe Sizes—Nominal and Published Inside Diameters, in
Orifice 2 3 4
Diameter
(in) 1.689 1.939 2.067 2.300 2.626 2.900 3.068 3.152 3.438
0.250 0.1105 0.1091 0.1087 0.1081 0.1078 0.1078 0.1080 0.1081 0.1084
0.375 0.0890 0.0878 0.0877 0.0879 0.0888 0.0898 0.0905 0.0908 0.0918
0.500 0.0758 0.0734 0.0729 0.0728 0.0737 0.0750 0.0758 0.0763 0.0778
0.625 0.0693 0.0647 0.0635 0.0624 0.0624 0.0634 0.0642 0.0646 0.0662
0.750 0.0675 0.0608 0.0586 0.0559 0.0546 0.0548 0.0552 0.0555 0.0568
0.875 0.0684 0.0602 0.0570 0.0528 0.0497 0.0488 0.0488 0.0489 0.0496
1.000 0.0702 0.0614 0.0576 0.0522 0.0473 0.0452 0.0445 0.0443 0.0443
1.125 0.0708 0.0635 0.0595 0.0532 0.0469 0.0435 0.0422 0.0417 0.0407
1.250 0.0650 0.0616 0.0552 0.0478 0.0434 0.0414 0.0406 0.0387
1.375 0.0629 0.0574 0.0496 0.0443 0.0418 0.0408 0.0379
1.500 0.0590 0.0518 0.0460 0.0431 0.0418 0.0382
1.625 0.0539 0.0482 0.0450 0.0435 0.0392
1.750 0.0553 0.0504 0.0471 0.0456 0.0408
1.875 0.0521 0.0492 0.0477 0.0427
2.000 0.0532 0.0508 0.0495 0.0448
2.125 0.0519 0.0509 0.0467
2.250 0.0483
2.375 0.0494

27. Orifice 4 €> 8
Diameter
(in) 3.826 4.026 4.897 5.189 5.761 6.065 7.625 7.981 8.071
0.250 0.1087 0.1091
0.375 0.0932 0.0939
0.500 0.0799 0.0810 0.0850 0.0862 0.0883 0.0895
0.625 0.0685 0.0697 0.0747 0.0762 0.0789 0.0802
0.750 0.0590 0.0602 0.0655 0.0672 0.0703 0.0718
0.875 0.0513 0.0524 0.0575 0.0592 0.0625 0.0642 0.0716 0.0730 0.0733
1.000 0.0453 0.0461 0.0506 0.0523 0.0556 0.0573 0.0652 0.0668 0.0662
1.125 0.0408 0.0412 0.0448 0.0464 0.0495 0.0512 0.0592 0.0609 0.0613
1.250 0.0376 0.0377 0.0401 0.0413 0.0442 0.0458 0.0538 0.0555 0.0560
1.375 0.0358 0.0353 0.0363 0.0373 0.0397 0.0412 0.0489 0.0506 0.0510
1.500 0.0350 0.0340 0.0334 0.0340 0.0360 0.0372 0.0445 0.0462 0.0466
1.625 0.0351 0.0336 0.0313 0.0315 0.0329 0.0339 0.0404 0.0421 0.0425
1.75 0.0358 0.034 0.03 0.0298 0.0304 0.0311 0.0369 0.0384 0.0388
1.875 0.0371 0.0349 0.0293 0.0287 0.0285 0.029 0.0338 0.0352 0.0355
2 0.0388 0.0363 0.0292 0.0281 0.0273 0.0273 0.0311 0.0323 0.0327
2.125 0.0407 0.036 0.0297 0.0281 0.0265 0.0262 0.0288 0.0298 0.0301
2.25 0.0427 0.0398 0.0305 0.0285 0.0261 0.0258 0.0268 0.0277 0.028
2.375 0.0445 0.0417 0.0316 0.0293 0.0262 0.0253 0.0252 0.0259 0.0261
2.5 0.046 0.0435 0.033 0.0304 0.0267 0.0254 0.0239 0.0244 0.0246
2.625 0.0472 0.045 0.0345 0.0317 0.0274 0.0258 0.023 0.0232 0.0233
2.75 0.0462 0.0362 0.0331 0.0264 0.0265 0.0224 0.0224 0.0224
2.875 0.0379 0.0347 0.0295 0.0274 0.022 0.0218 0.0218
3 0.0395 0.0364 0.0308 0.0285 0.0219 0.0214 0.0213
3.125 0.041 0.038 0.0323 0.0297 0.022 0.0213 0.0211
3.25 0.0422 0.0394 0.0338 0.0311 0.0223 0.0214 0.0212
3.375 0.0432 0.0408 0.0353 0.0325 0.0228 0.0216 0.0214
3.5 0.0419 0.0367 0.0339 0.0235 0.0221 0.0218
3.625 0.0428 0.0381 0.0354 0.0243 0.0227 0.0224
3.75 0.0393 0.0367 0.0252 0.0234 0.023
3.875 0.0404 0.038 0.0262 0.0243 0.0238
4 0.0413 0.0391 0.0273 0.0252 0.0246
4.25 0.0296 0.0273 0.0268
4.5 0.0321 0.0296 0.029
4.75 0.0344 0.032 0.0314
5 0.0364 0.0342 0.0336
5.25 0.0381 0.0361 0.0356
5.5 0.0377 0.0372

28. Orifice 10 12 16
Diameter
(in) 9.564 10.02 10.136 11.376 11.938 12.09 14.688 15 15.25
1 0.0728
1.125 0.0674 0.069 0.0694
1.25 0.0624 0.0641 0.0646 0.0687 0.0704 0.0708
1.375 0.0576 0.0594 0.0599 0.0643 0.0661 0.0666
1.5 0.0532 0.055 0.0555 0.0601 0.062 0.0625 0.0697 0.0705
1.625 0.049 0.0509 0.0514 0.0561 0.058 0.0585 0.0662 0.067 0.0676
1.75 0.0452 0.0471 0.0476 0.0523 0.0543 0.0548 0.0628 0.0636 0.0642
1.875 0.0417 0.0436 0.044 0.0488 0.0508 0.0513 0.0594 0.0603 0.061
2 0.0385 0.0403 0.0407 0.0454 0.0475 0.048 0.0563 0.0572 0.0578
2.125 0.0355 0.0372 0.0377 0.0423 0.0443 0.0449 0.0532 0.0541 0.0548
2.25 0.0329 0.0345 0.0349 0.0394 0.0414 0.0419 0.0503 0.0512 0.0519
2.375 0.0305 0.032 0.0324 0.0367 0.0387 0.0392 0.0475 0.0484 0.0492
2.5 0.0283 0.0298 0.0301 0.0342 0.0361 0.0366 0.0449 0.0458 0.0466
2.625 0.0265 0.0277 0.0281 0.0319 0.0337 0.0342 0.0424 0.0433 0.044
2.75 0.0248 0.026 0.0262 0.0298 0.0316 0.032 0.04 0.0409 0.0417
2.875 0.0234 0.0244 0.0246 0.0279 0.0295 0.03 0.0378 0.0387 0.0394
3 0.0222 0.0230.0232 0.0262 0.0277 0.0281 0.0356 0.0365 0.0372
3.125 0.0212 0.0218 0.022 0.0244 0.026 0.0264 0.0336 0.0345 0.0352
3.25 0.0204 0.0209 0.0221 0.0232 0.0245 0.0249 0.0317 0.0326 0.0332
3.375 0.0199 0.0201 0.0202 0.022 0.0232 0.0235 0.03 0.0308 0.0314
3.5 0.0195 0.0195 0.0196 0.021 0.022 0.0222 0.0263 0.0291 0.0297
3.625 0.0193 0.0191 0.0191 0.02 0.0209 0.0212 0.0368 0.0275 0.0281
3.75 0.0192 0.0188 0.0188 0.0193 0.02 0.0202 0.0254 0.0261 0.0267
3.875 0.0193 0.0187 0.0186 0.0187 0.0192 0.0194 0.024 0.0247 0.0253
4 0.0195 0.0187 0.0186 0.0182 0.0185 0.0187 0.0228 0.0235 0.024
4.25 0.0203 0.0192 0.0189 0.0176 0.0196 0.0177 0.0207 0.0213 0.0217
4.5 0.0215 0.02 0.0197 0.0175 0.0172 0.0171 0.019 0.0194 0.0198
4.75 0.023 0.0212 0.0208 0.0178 0.0171 0.017 0.0176 0.018 0.0182
5 0.0248 0.0228 0.0223 0.0185 0.0174 0.0173 0.0166 0.0168 0.017
5.25 0.0267 0.0244 0.0239 0.0194 0.0181 0.0178 0.016 0.0161 0.0162
5.5 0.0287 0.0263 0.0257 0.0207 0.019 0.0186 0.0156 0.0156 0.0156
5.75 0.0307 0.0282 0.0276 0.0221 0.0202 0.0197 0.0155 0.0154 0.0153
6 0.0326 0.0302 0.0295 0.0231 0.0215 0.021 0.0157 0.0154 0.0153
6.25 0.0343 0.032 0.0316 0.0253 0.023 0.0224 0.0161 0.0157 0.0154
6.5 0.0358 0.0336 0.0331 0.027 0.0246 0.0239 0.0167 0.0162 0.0159