Table 5—Maximum Allowable Pipe Length (Ft) Continued
ALTITUDE UNIT SIZE
TERMINATION
TYPE
PIPE DIA
(IN.)*
NUMBER OF 90° ELBOWS
123456
5001 to 6000‡
040-08
040-12
2 Pipe or 2-In.
Concentric
1-1/2 57 52 47 42 40 35
2 707070707070
060-08
060-12
060-16
2 Pipe or 2-In.
Concentric
1-1/2 14 9 NA NA NA NA
2 605554494847
080-12
080-16
080-20
2 Pipe or 2-In.
Concentric
2 4136231817 8
2-1/2 70 70 70 70 70 70
100-16
100-20
2 Pipe or 3-In.
Concentric
2-1/2 29 21 12 11 NA NA
3 706762575247
120-20
2 Pipe or 3-In.
Concentric
3† one disk 26 24 23 18 17 16
3† no disk 53 52 50 49 48 47
ALTITUDE UNIT SIZE
TERMINATION
TYPE
PIPE DIA
(IN.)*
NUMBER OF 90° ELBOWS
123456
6001 to 7000‡
040-08
040-12
2 Pipe or 2-In.
Concentric
1-1/2 53 48 43 38 37 32
2 707068676664
060-08
060-12
060-16
2 Pipe or 2-In.
Concentric
1-1/2 13 8 NA NA NA NA
2 575250454443
080-12
080-16
080-20
2 Pipe or 2-In.
Concentric
2 3833211615 6
2-1/2 70 70 68 67 66 64
100-16
100-20
2 Pipe or 3-In.
Concentric
2-1/2 27 19 10 9 NA NA
3 686358534843
120-20
2 Pipe or 3-In.
Concentric
3† one disk 24 22 21 16 15 13
3† no disk 49 48 47 45 44 43
ALTITUDE UNIT SIZE
TERMINATION
TYPE
PIPE DIA
(IN.)*
NUMBER OF 90° ELBOWS
123456
7001 to 8000‡
040-08
040-12
2 Pipe or 2-In.
Concentric
1-1/2 49 44 39 34 33 28
2 666563626059
060-08
060-12
060-16
2 Pipe or 2-In.
Concentric
1-1/2 12 7 NA NA NA NA
2 534846414038
080-12
080-16
080-20
2 Pipe or 2-In.
Concentric
2 3631191412NA
2-1/2 66 65 63 62 60 59
100-16
100-20
2 Pipe or 3 In.
Concentric
2-1/2 25 17 8 7 NA NA
3 635853484338
120-20
2 Pipe or 3-In.
Concentric
3† one disk 22 20 19 14 12 11
3† no disk 46 44 43 41 40 38
ALTITUDE UNIT SIZE
TERMINATION
TYPE
PIPE DIA
(IN.)*
NUMBER OF 90° ELBOWS
123456
8001 to 9000‡
040-08
040-12
2 Pipe or 2-In.
Concentric
1-1/2 46 41 36 31 29 24
2 626058565553
060-08
060-12
060-16
2 Pipe or 2-In.
Concentric
1-1/2 11 6 NA NA NA NA
2 494442373534
080-12
080-16
080-20
2 Pipe or 2-In.
Concentric
2 3328171210NA
2-1/2 62 60 58 56 55 53
100-16
100-20
2 Pipe or 3-In.
Concentric
2-1/2 23 15 7 5 NA NA
3 595449443934
120-20
2 Pipe or 3-In.
Concentric
3† one disk 20 18 17 12 10 8
3† no disk 43 41 39 37 35 34
See notes on page 25.
24