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| Drill
Size |
Diameter
in Inches |
Orifice
Area-Sq.In. |
Propane
11"w.c. |
Butane
11"w.c. |
Natural Gas
7"w.c. |
| 80
79 78 77 76 |
0.0135
0.0145 0.0160 0.0180 0.0200 |
.000143
.000165 .000201 .000254 .000314 |
1,270
1,470 1,790 2,260 2,790 |
1,410
1,625 1,980 2,500 3,090 |
640
770 900 1,150 1,400 |
| 75
74 73 72 71 |
0.0210
0.0225 0.0240 0.0250 0.0260 |
.000346
.000398 .000452 .000491 .000531 |
3,080
3,540 4,020 4,370 4,730 |
3,410
3,920 4,450 4,840 5,240 |
1,600
1,775 2,000 2,200 2,500 |
| 70
69 68 67 66 |
0.0280
0.0292 0.0310 0.0320 0.0330 |
.000616
.000670 .000755 .000804 .000855 |
5,490
5,960 6,720 7,150 7,600 |
6,070
6,600 7,440 7,920 8,420 |
2,750
3,000 3,390 3,600 3,850 |
| 65
64 63 62 61 |
0.0350
0.0360 0.0370 0.0380 0.0390 |
.000962
.001018 .001075 .001134 .001195 |
8,560
9,050 9,570 10,100 10,600 |
9,480
10,030 10,600 11,140 11,800 |
4,300
4,550 4,800 5,100 5,400 |
| 60
59 58 57 56 |
0.0400
0.0410 0.0420 0.0430 0.0465 |
.001257
.001321 .001385 .001452 .001698 |
11,170
11,750 12,300 12,930 12,100 |
12,300
13,000 13,900 14,300 16,700 |
5,650
5,900 6,200 6,500 7,600 |
| 55
54 53 52 51 |
0.0520
0.0550 0.0595 0.0635 0.0670 |
.002120
.002380 .002780 .003170 .003530 |
18,850
21,200 21,700 28,200 31,400 |
20,900
23,400 27,400 31,200 35,000 |
9,550
10,700 12,500 14,200 15,800 |
| 50
49 48 47 46 |
0.0700
0.0730 0.0760 0.0785 0.0810 |
.003850
.004190 .004540 .004840 .005150 |
34,200
37,200 40,400 43,000 45,800 |
38,000
40,300 44,700 47,600 50,700 |
17,300
18,800 20,700 22,000 23,600 |
| 45
44 43 42 41 |
0.0820
0.0860 0.0890 0.0935 0.0960 |
.005280
.005800 .006220 .006870 .007240 |
47,000
51,600 55,300 61,100 64,400 |
52,000
57,200 61,300 67,700 71,300 |
24,000
26,500 28,400 31,400 33,100 |
| 40
39 38 37 36 |
0.0980
0.0995 0.1015 0.1040 0.1065 |
.007540
.007780 .008090 .008490 .008910 |
67,000
69,200 72,000 75,500 79,300 |
74,200
76,600 79,600 83,600 87,800 |
34,200
35,500 37,000 38,700 40,500 |
| 35
34 33 32 31 |
0.1100
0.1110 0.1130 0.1160 0.1200 |
.009500
.009680 .010030 .010570 .011310 |
84,500
86,200 94,000 98,300 100,600 |
93,600
95,300 99,500 104,000 111,500 |
43,200
44,100 45,800 48,300 51,500 |
| 30
29 28 27 26 |
0.1285
0.1360 0.1405 0.1440 0.1470 |
.012960
.014530 .015490 .016290 .016970 |
115,300
129,500 137,500 145,000 151,000 |
127,600
145,200 152,500 160,500 167,000 |
59,500
66,000 70,500 74,500 77,500 |
| 25
24 23 22 21 |
0.1495
0.1520 0.1540 0.1570 0.1590 |
.017550
.018150 .018630 .019360 .019860 |
156,000
161,500 166,000 172,000 176,500 |
173,000
179,200 183,500 190,700 195,700 |
80,000
82,500 85,000 87,500 90,000 |
| 20
19 18 17 16 |
0.1610
0.1660 0.1695 0.1730 0.1770 |
.020360
.021640 .022560 .023510 .024610 |
181,100
193,000 200,500 209,000 219,000 |
200,000
215,000 222,000 231,600 242,500 |
93,500
97,500 102,000 106,000 111,000 |
| 15
14 13 12 11 10 |
0.1800
0.1820 0.1850 0.1890 0.1910 0.1935 |
.025450
.026020 .026880 .028060 .028650 .029400 |
236,500
229,500 242,000 250,000 255,000 261,000 |
250,500
256,500 264,500 275,000 282,000 289,500 |
115,000
117,000 121,000 126,000 130,000 132,000 |