ECR International Utica Boilers MAH-100 Installation, Operation & Maintenance Manual page 43

This chart is sourced from NFPA-54 2015 with the BTU ratings for the material, length, and diameter of gas pipe.
INTENDED USE: Pipe Sizing Between Natural Gas Meter, or Propane Single - or Second-Stage (Low-Pressure) Regulator and
Appliance.
INTENDED USE: Pipe Sizing Between Natural Gas Meter, or Propane Single- or Second-Stage (Low-
Pressure) Regulator and Appliance.
Schedule 40 Metallic Pipe
Gas:
Inlet Pressure:
Pressure Drop:
Specific Gravity:
Nominal ID (inches):
Length (ft)
Corrugated Stainless Steel Tubing (CSST) w/ pressure drop of 0.5 inches w.c.
Gas:
Inlet Pressure:
Pressure Drop:
Specific Gravity:
Tube Size (inches):
Flow Designation (EHD):
Length (ft)
7 - GAS SUPPLY PIPING
3/4
Capacity in Thousands of Btu per
360
10
247
20
199
30
170
40
151
50
137
60
117
80
100 104
23
Capacity in Thousands of Btu per
10 161
20 116
30 96
40 83
50 75
60 68
80 60
100 54
Natural
Less than 2 psi
0.5 in. w.c.
0.60
1
Hour
678
466
347
320
284
257
220
195
Natural
Less than 2 psi
0.5 in. w.c.
0.60
3/4
1
25 30 31
Hour
192 330 383
137 231 269
112 188 218
97 162 188
87 144 168
80 131 153
69 113 132
62 101 118
39
Undiluted Propane
11.0 in. w.c.
0.5 in. w.c.
1.50
3/4
Capacity in Thousands of Btu per
Hour
608 1,150
418 787
336 632
287 541
255 480
231 434
212 400
197 372
Undiluted Propane
11.0 in. w.c.
0.5 in. w.c.
1.50
3/4
23 25 30
Capacity in Thousands of Btu per
Hour
254 303 521
183 216 365
151 177 297
131 153 256
118 137 227
107 126 207
94 109 178
85 98 159
240013354 REV A [07/01/2021]
1
1
31
605
425
344
297
265
241
208
186