Installation Guide

Table 2 - 0.3 Inch Water Column Pressure Drop for Black Iron - Schedule 40 Metallic Pipe
Pipe Size (in.)
Nominal Dia. ½ ¾ 1 1¼ 1½ 2
Length (ft) Capacity in BTU per Hour**
10 134,144 279,552 526,336 1,085,440 1,617,920 3,123,200
20 92,160 192,512 363,520 743,424 1,116,160 2,140,160
30 73,728 154,624 290,816 596,992 893,952 1,720,320
40 63,488 132,096 248,832 510,976 764,928 1,474,560
50 56,320 116,736 220,160 452,608 677,888 1,310,720
60 51,200 106,496 199,680 409,600 614,400 1,187,840
70 47,104 97,280 183,296 376,832 565,248 1,085,440
80 43,008 91,136 171,008 351,232 526,336 1,012,736
90 40,960 84,992 160,768 329,728 493,568 950,272
100 38,912 80,896 151,552 311,296 465,920 898,048
** Calculated based ANSI Z223.1-2012 Table 6.2(a) using 1,024 BTU per Cubic Foot of Gas
Gas Pipe Capacity Charts
Table 3 - 0.5 Inch Water Column Pressure Drop for Black Iron - Schedule 40 Metallic Pipe
Pipe Size (in.)
Nominal Dia. ½ ¾ 1 1¼ 1½ 2
Length (ft) Capacity in BTU per Hour**
10 176,128 368,640 694,272 1,423,360 2,140,160 4,116,480
20 120,832 252,928 477,184 979,968 1,464,320 2,826,240
30 97,280 203,776 382,976 786,432 1,177,600 2,273,280
40 82,944 174,080 327,680 672,768 1,008,640 1,945,600
50 73,728 154,624 290,816 596,992 893,952 1,720,320
60 66,560 140,288 263,168 540,672 809,984 1,556,480
70 61,440 129,024 242,688 497,664 745,472 1,433,600
80 57,344 119,808 225,280 462,848 693,248 1,331,200
90 53,248 112,640 211,968 434,176 650,240 1,249,280
100 51,200 106,496 199,680 409,600 614,400 1,187,840
** Calculated based ANSI Z223.1-2012 Table 6.2(b) using 1,024 BTU per Cubic Foot of Gas
Table 4 - 3 Inch Water Column Pressure Drop for Black Iron - Schedule 40 Metallic Pipe
Initial gas supply pressure must be 8.0 inches of water column or greater
Pipe Size (in.)
Nominal Dia. ½ ¾ 1 1¼ 1½ 2
Length (ft) Capacity in BTU per Hour**
10 464,896 971,776 1,829,888 3,757,056 5,628,928 10,842,112
20 319,488 667,648 1,257,472 2,582,528 3,868,672 7,451,648
30 256,000 536,576 1,009,664 2,073,600 3,868,672 5,984,256
40 219,136 458,752 864,256 1,774,592 2,659,328 5,121,024
50 194,560 396,288 765,952 1,572,864 2,357,248 4,539,392
60 176,128 368,640 694,272 1,425,408 2,135,040 4,112,384
70 161,792 338,944 638,976 1,310,720 1,965,056 3,783,680
80 150,528 315,392 593,920 1,219,584 1,827,840 3,519,488
90 141,312 295,936 557,056 1,144,832 1,715,200 3,302,400
100 134,144 279,552 526,336 1,081,344 1,619,968 3,119,104
** Calculated based ANSI Z223.1-2012 Table 6.2(c) using 1,024 BTU per Cubic Foot of Gas
Tables are based on the National Fuel Gas Code, NFPA54, ANSI Z223.1 2012 Edition.