Burnham Series 8H/8HE Boiler Manual De Propietario
57
MAXIMUM CAPACITY OF PIPE (FT
3
/HR)
(Based on gas pressure at 0.5 psig., pressure drop of 0.3" water column, and 0.60 specific gravity.)
TO UsE ThIs TAbLE: (1) ENTER ThE TOP ROw AT ThE TOTAL EQUIVALENT LENGTh Of PIPE ObTAINED
fROM 4.4.1 - 1). (2) MOVE DOwN TO ThE EQUIVALENT GAs fLOw ObTAINED fROM 4.4.1 - 3). (3) MOVE
AcROss TO ThE LEfT hAND cOLUMN. (4) READ ThE REQUIRED PIPE sIZE.
CORRECTION FACTORS FOR SPECIFIC GRAVITY OTHER THAN .60
To use this table: (1) Read directly the multiplier for the specific gravity of the gas to be used. (2) Multiply actual
gas flow rates by this multiplier to obtain equivalent flow rates for .60 specific gravity gas. (3) Enter Figure 4.5 with
these equivalent gas flow rates to determine gas pipe sizes.
fIGURE 4-5
fIGURE 4-6
Nominal
Iron Pipe
size, In.
Internal
Dia., In.
Length of Pipe, feet
10
20
30
40
50
60
70
80
90
100
125
150
175
200
1/4
.364
32
22
18
15
14
12
11
11
10
9
8
8
7
6
3/8
.493
72
49
40
34
30
27
25
23
22
21
18
17
15
14
1/2
.622
132
92
73
63
56
50
46
43
40
38
34
31
28
26
3/4
.824
278
190
152
130
115
105
96
90
84
79
72
64
59
55
1
1.049
50
350
285
245
215
195
180
170
160
150
130
120
110
100
1-1/4
1.380
1,050
730
590
500
440
400
370
350
320
305
275
250
225
210
1-1/2
1.610
1,600
1,100
890
760
670
610
560
530
490
460
410
380
350
320
2
2.067
3,050
2,100
1,650
1,450 1,270 1,150 1,050
990
930
870
780
710
650
610
2-1/2
2.469
4,800
3,300
2,700
2,300 2,000 1,850 1,700 1,600 1,500 1,400 1,250 1,130 1,050
980
3
3.068
8,500
5,900
4,700
4,100 3,600 3,250 3,000 2,800 2,600 2,500 2,200 2,000 1,850 1,700
4
4.026
17,500
12,000 9,700
8,300 7,400 6,800 6,200 5,800 5,400 5,100 4,500 4,100 3,800 3,500
Specific Gravity
Multiplier
Specific Gravity
Multiplier
.35
.763
1.00
1.29
.40
.813
1.10
1.35
.45
.862
1.20
1.40
.50
.909
1.30
1.47
.55
.962
1.40
1.53
.60
1.00
1.50
1.58
.65
1.04
1.60
1.63
.70
1.08
1.70
1.68
.75
1.12
1.80
1.73
.80
1.15
1.90
1.77
.85
1.19
2.00
1.83
.90
1.22
2.10
1.87