Installation instructions
FOR NATURAL GAS
Maximum Capacity of pipe in Cubic Feet of Gas per Hour for Gas Pressure of 0.5 Psig or less and a Pressure drop of 0.3 in Water Column (0.75mbar).(Based on a 0.60 Specific Gravity Gas) Btu numbers given in thousands.
Follow boxed numbers for piping just one
Nominal |
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Iron |
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Pipe | Internal |
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Size, | Diameter |
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(inches) | (inches) | 10 | 20 | 30 | 40 | 50 | 60 | 70 | 80 | 90 | 100 125 | 150 175 200 |
1/4 0.364
3/8 0.493
1/2 0.622
32
72
132
22 | 18 | 15 | 14 | 12 | 11 | 11 | 10 | 9 | 8 | 8 | 7 | 6 |
49 | 40 | 34 | 30 | 27 | 25 | 23 | 22 | 21 | 18 | 17 | 15 | 14 |
92 | 73 | 63 | 56 | 50 | 46 | 43 | 40 | 38 | 34 | 31 | 28 | 26 |
3/4 | 0.824 | 278 | 190 | 152 | 130 | 115 | 105 | 96 | 90 | 84 | 79 | 72 | 64 | 59 | 55 | |
1 | 1.049 | 520 | 350 | 285 | 245 |
| 215 | 195 | 180 | 170 | 160 | 150 | 130 | 120 | 110 | 100 |
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1 1/4 | 1.380 | 1050 | 730 | 590 | 500 | 440 | 400 | 370 | 350 | 320 | 305 | 275 | 250 | 225 | 210 | |
1 1/2 | 1.610 | 1600 | 1100 | 890 | 760 | 670 | 610 | 560 | 530 | 490 | 460 | 410 | 380 | 350 | 320 | |
2 | 2.067 | 3050 | 2100 | 1650 | 1450 | 1270 | 1150 | 1050 | 990 | 930 | 870 | 780 | 710 | 650 | 610 | |
2 1/2 | 2.469 | 4800 | 3300 | 2700 | 2300 | 2000 | 1850 | 1700 | 1600 | 1500 | 1400 | 1250 | 1130 | 1050 | 980 | |
3 | 3.068 | 8500 | 5900 | 4700 | 4100 | 3600 | 3250 | 3000 | 2800 | 2600 | 2500 | 2200 | 2000 | 1850 | 1700 | |
4 | 4.026 | 17,500 | 12,000 | 9,700 | 8,300 | 7,400 | 6,80 | 6,200 | 5,800 | 5,400 | 5,100 | 4,500 | 4,100 | 3,800 | 3500 | |
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Length of Flexible Corrugated Stainless Steel Tubing (CSST), Feet
Tube |
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inches | EHD* |
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1/2 | 18 EHD 82 | 58 | 47 | 41 | 37 | 34 | |||
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3/4 | 23 EHD | 161 | 116 | 96 | 83 | 75 | 68 | ||
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1 | 30 EHD 330 |
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1 1/4 | 37 EHD 639 | 456 | 374 | 325 | 292 | 267 | |||
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*EHD = Equivalent Hydraulic Diameter. The greater the value of EHD, the greater the gas capacity of the tubing.
FOR LP GAS
Maximum Capacity of Pipe in Thousands of BTU per Hour of Undiluted Petroleum Gases (at 11 inches Water Column Inlet Pressure) (Based on a Pressure Drop of 0.5 Inch Water Column).
Nominal |
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iron |
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pipe |
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| Length of Pipe, Feet |
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Inches | 10 | 20 | 30 | 40 | 50 | 60 | 80 | 100 | 125 | 150 | 200 | ||
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| 1/2 |
| 291 | 200 | 160 | 137 | 122 | 110 | 94 | 84 | 74 | 67 | 58 |
| 3/4 |
| 608 | 418 | 336 | 287 | 255 | 231 | 197 | 175 | 155 | 140 | 120 |
| 1 |
| 1145 | 787 | 632 | 541 | 480 | 434 | 372 | 330 | 292 | 265 | 227 |
*EHD = Equivalent Hydraulic Diameter. The greater the value of EHD, the greater the gas capacity of the tubing.
Length of Flexible Corrugated Stainless Steel Tubing (CSST), Feet
Tube |
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size |
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inches | EHD* |
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1/2 | 18 EHD | 129 | 91 | 74 | 64 | 58 | 53 | ||
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3/4 | 23 EHD 254 |
| 183 | 151 | 131 | 118 | 107 | ||
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1 | 30 EHD 521 | 365 | 297 | 256 |
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1 1/4 | 37 EHD 971 | 661 | 528 | 449 | 397 | 359 | |||
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Maximum Capacity of Semi-Rigid (flexible, non
corrugated) Tubing in Thousands of BTU per Hour of
Undiluted Liquefied Petroleum Gases (at 11 inches
Water Column Inlet Pressure).
(Based on a Pressure Drop of 0.5 Inch Water Column)
*Source National Fuel Gas Code NFPA 54, ANSI Z223.1 - No Additional Allowance is necessary for an ordinary number of fittings
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Outside |
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| Length of Tubing, Feet |
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diameter |
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Inch | 10 | 20 | 30 | 40 | 50 | 60 | 70 | 80 | 90 | 100 | |||
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3/8 |
| 39 | 26 | 21 | 19 | _ | _ | _ | _ | _ | _ | ||
1/2 |
| 92 | 62 | 50 | 41 | 37 | 35 | 31 | 29 | 27 | 26 | ||
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| 5/8 |
| 199 | 131 | 107 | 90 | 79 | 72 | 67 | 62 | 59 | 55 | |
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| 3/4 |
| 329 | 216 |
| 181 | 145 | 131 | 121 | 112 | 104 | 95 | 90 |
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Fig. 26
24 | 6 720 607 909 |