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24
Table
6.2(a)
Maximum Capacity of Metallic Pipe in Cubic Feet of Gas per Hour for Gas Pressures of 2 psi or Less
and a Pressure Drop of 0.3 Inch Water Column (Based on a 0.60 Specific Gravity Gas)
Nominal
Pipe
Size
(Inches)
Actual
ID
(Inches)
Length of Pipe (Feet)
10 20 30 40 50 60 70 80 90 100 125 150 175 200
1/2 .622 131 90 72 62 55 50 46 42 40 38 33 30 28 26
3/4 .824 273 188 151 129 114 104 95 89 83 79 70 63 58 54
1 1.049 514 353 284 243 215 195 179 167 157 148 131 119 109 102
1 1/4 1.380 1,060 726 583 499 442 400 368 343 322 304 269 244 224 209
1 1/2 1.610 1,580 1,090 873 747 662 600 552 514 482 455 403 366 336 313
2 2.067 3,050 2,090 1,680 1,440 1,280 1,160 1,060 989 928 877 777 704 648 602
2 1/2 2.469 4,860 3,340 2,680 2,290 2,030 1,840 1,690 1,580 1,480 1,400 1,240 1,120 1,030 960
3 3.068 8,580 5,900 4,740 4,050 3,590 3,260 3,000 2,790 2,610 2,470 2,190 1,980 1,820 1,700
4 4.026 17,500 12,000 9,660 8,270 7,330 6,640 6,110 5,680 5,330 5,040 4,460 4,050 3,720 3,460
© 2009 National Fire Protection Association, Inc. and International Approval Services - U.S., Inc. All Rights Reserved.
TEST CONNECTIONS
All connections and joints must be thoroughly tested for leaks in accordance with local
codes and all listed procedures in the latest edition of the National Fuel Gas Code ANSI
Z223.1/NFPA 54, Natural Gas and Propane Installation Code, CSA B149.1, or Propane
Storage and Handling Code, B149.2, or the Standard for Recreational Vehicles, ANSI A
119.2/NFPA 1192, and CSA Z240 RV Series, Recreational Vehicle Code, as applicable.
m DANGER
Do not use an open flame to check for gas leaks. Be sure
there are no sparks or open flames in the area while you
check for gas leaks. This will result in a fire or explosion
which can cause serious bodily injury or death, and damage
to property.
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GaS SUPPLY