PEERLESS Stainless Steel Gas Boilers Installation, Operation & Maintenance Manual page 15

Table 4.1: Natural Gas
Model
PI-80
PI-140
PI-199
Based on 1000 Btu/Cubic Ft.
Table 4.2: LP Gas
Model
PI-80
PI-140
PI-199
Based on 2500 Btu/Cubic Ft.
Table 4.3: Pipe Capacity
Capacity of pipe of different diameters and lengths in cu. ft. per
hour with pressure drop of 0.3 in. and specific gravity of 0.60.
No allowance for an ordinary number of fittings is required.
Pipe
³⁄₄" " 1" "
Length
Pipe Pipe
Feet
10 278 520
20 190 350
30 152 285
40 130 245
50 115 215
60 105 195
Multipliers to be used with the above table when the
specific gravity of the gas is other than 0.60:
Specific Gravity . . . .0.5 0.55
Multiplier . . . . . . . . .1.10 1.04
Input
(Cubic Ft/Hr)
80
140
199
Input
(Cubic Ft/Hr)
32
56
79
1¹⁄₄" " 1¹⁄₂" "
Pipe Pipe
1,050 1,600
730 1,100
590 890
500 760
440 670
400 610
0.60 0.65 0.70
1.00 0.962 0.926
GAS PIPING
13