Operating instructions

TABLE 5—MAXIMUM ALLOWABLE PIPE LENGTH (FT)
ALTITUDE UNIT SIZE
TERMINATION
TYPE
PIPE DIA
(IN.)*
NUMBER OF 90° ELBOWS
123456
0 to 2000
024040
036040
2 Pipe or 2-In.
Concentric
1 5 NA NA NA NA NA
1-1/2 70 70 65 60 60 55
2 707070707070
024060
036060
048060
2 Pipe or 2-In.
Concentric
1-1/2 20 15 10 5 NA NA
2 707070707070
036080
048080
060080
2 Pipe or 2-In.
Concentric
1-1/2 10 NA NA NA NA NA
2 555035303020
2-1/2 70 70 70 70 70 70
048100
060100
2 Pipe or 3-In.
Concentric
2 5 NA NA NA NA NA
2-1/2 40 30 20 20 10 NA
3 707070707070
060120
2 Pipe or 3-In.
Concentric
2-1/2 one disk 10 NA NA NA NA NA
3 one disk 35 30 15 NA NA NA
3† one disk 35 35 35 30 30 30
3† no disk 70 70 70 70 70 70
ALTITUDE UNIT SIZE
TERMINATION
TYPE
PIPE DIA
(IN.)*
NUMBER OF 90° ELBOWS
1234 5 6
2001 to 3000
024040
036040
2 Pipe or 2-In.
Concentric
1-1/2 67 62 57 52 52 47
2 70707070 70 70
024060
036060
048060
2 Pipe or 2-In.
Concentric
1-1/2 17 12 7 NA NA NA
2 70676661 61 61
036080
048080
060080
2 Pipe or 2-In.
Concentric
2 49443025 25 15
2-1/2 70 70 70 70 70 70
048100
060100
2 Pipe or 3-In.
Concentric
2-1/2 35 26 16 16 6 NA
3 70707070 66 61
060120
2 Pipe or 3-In.
Concentric
3 one disk 31 26 12 NA NA NA
3† one disk 31 30 30 25 25 24
3† no disk 63 62 62 61 61 61
ALTITUDE UNIT SIZE
TERMINATION
TYPE
PIPE DIA
(IN.)*
NUMBER OF 90° ELBOWS
1234 5 6
3001 to 4000
024040
036040
2 Pipe or 2-In.
Concentric
1-1/2 64 59 54 49 48 43
2 70707070 70 70
024060
036060
048060
2 Pipe or 2-In.
Concentric
1-1/2 16 11 6 NA NA NA
2 68636257 57 56
036080
048080
060080
2 Pipe or 2-In.
Concentric
2 46412823 22 13
2-1/2 70 70 70 70 70 70
048100
060100
2 Pipe or 3-In.
Concentric
2-1/2 33 24 15 14 5 NA
3 70707066 61 56
060120
2 Pipe or 3-In.
Concentric
3 one disk 29 24 10 NA NA NA
3† one disk 29 28 28 23 22 21
3† no disk 59 59 58 57 57 56
ALTITUDE UNIT SIZE
TERMINATION
TYPE
PIPE DIA
(IN.)*
NUMBER OF 90° ELBOWS
1234 5 6
4001 to 5000‡
024040
036040
2 Pipe or 2-In.
Concentric
1-1/2 60 55 50 45 44 39
2 70707070 70 70
024060
036060
048060
2 Pipe or 2-In.
Concentric
1-1/2 15 10 5 NA NA NA
2 64595853 52 52
036080
048080
060080
2 Pipe or 2-In.
Concentric
2 44392621 20 11
2-1/2 70 70 70 70 70 70
048100
060100
2 Pipe or 3-In.
Concentric
2-1/2 31 22 13 12 NA NA
3 70706762 57 52
060120
2 Pipe or 3-In.
Concentric
3† one disk 27 26 26 21 20 19
3† no disk 56 55 54 53 52 52
See notes on page 25.
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