Burnham Alpine ALP080, Installation, Operating And Service Instructions

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Table 1B: Maximum Capacity of Schedule 0 Black Pipe in CFH* (LP gas) For gas Pressures
of 0.5 psig or Less
inlet Pressure 11.0 inch W.C.; 0. inch W.C. Pressure Drop
Nominal Pipe
Size, In.
Inside
Diameter, In.
Length of Pipe, Ft.
10 20 30 40 50 60 70 80 90 100
½
0.622 88 60 48 41 37 33 31 29 27 25
¾ 0.824 184 126 101 87 77 70 64 60 56 53
1 1.049 346 238 191 163 145 131 121 112 105 100
1¼ 1.380 710 488 392 336 297 269 248 231 216 204
1½
1.610 1064 732 588 503 446 404 371 346 324 306
2 2.067 2050 1409 1131 968 858 778 715 666 624 590
2½
2.469 3267 2246 1803 1543 1368 1239 1140 1061 995 940
3 3.068 5776 3970 3188 2729 2418 2191 2016 1875 1760 1662
inlet Pressure 11.0 inch W.C.; 0.5 inch W.C. Pressure Drop
Nominal Pipe
Size, In.
Inside
Diameter, In.
Length of Pipe, Ft.
10 20 30 40 50 60 70 80 90 100
½
0.622 116 80 64 55 48 44 40 38 35 33
¾ 0.824 242 166 134 114 101 92 85 79 74 70
1 1.049 456 314 252 215 191 173 159 148 139 131
1¼ 1.380 937 644 517 442 392 355 327 304 285 269
1½
1.610 1403 964 775 663 588 532 490 456 427 404
2 2.067 2703 1858 1492 1277 1131 1025 943 877 823 778
2½
2.469 4308 2961 2377 2035 1803 1634 1503 1399 1312 1239
3 3.068 7615 5234 4203 3597 3188 2889 2658 2472 2320 2191
* 1 CFH of LP Gas is approximately equal to 2.5 MBH; contact your gas supplier for the actual heating value
of your gas.
Table 15: Equivalent Lengths of Standard Pipe Fittings & Valves
Nominal
Pipe Size,
Inc.
Inside
Diameter,
In.
Valves (Screwed) - Fully Open Screwed Fittings
Gate Globe Angle
Swing
Check
45°
Elbow
90°
Elbow
180 Close
Return
Bend
90 Tee
Flow Thru
Run
90 Tee,
Flow Thru
Branch
½
0.622 0.4 17.3 8.7 4.3 0.7 1.6 3.5 1.6 3.1
¾ 0.824 0.5 22.9 11.4 5.7 1.0 2.1 4.6 2.1 4.1
1 1.049 0.6 29.1 14.6 7.3 1.2 2.6 5.8 2.6 5.2
1¼ 1.38 0.8 38.3 19.1 9.6 1.6 3.5 7.7 3.5 6.9
1½
1.61 0.9 44.7 22.4 11.2 1.9 4.0 9.0 4.0 8.0
2 2.067 1.2 57.4 28.7 14.4 2.4 5.2 11.5 5.2 10.3
2½
2.469 1.4 68.5 34.3 17.1 2.9 6.2 13.7 6.2 12.3
3 3.068 1.8 85.2 42.6 21.3 3.6 7.7 17.1 7.7 15.3
WaRning
Failure to use proper thread compounds on all
gas connectors may result in leaks of flammable
gas.
WaRning
gas supply to boiler and system must be
absolutely shut off prior to installing or servicing
boiler gas piping.
Vii. gas Piping (continued)