4-2.3.6 Pipe Sizing; Kidde Pipe Size Estimating Table - Kidde Fire Systems ECS Manual

Design and Installation
Note: Any system designed for a space less than 12 in (0.3 m) in height is not a UL Listed or
FM Approved design.
4-2.3.6 Pipe Sizing
The following table may be used as an estimating guide for sizing distribution piping.
Nominal Pipe Size
(inches)
1/2
3/4
1
1¼
1½
2
2½
3
4
5
6
Note: This table is intended for use as a guide only. The latest version of the flow calculation
software program must be used for the final design.
October 2014
System With A
Single Row of Nozzles Multiple Row of Nozzles
30ft. Max
Figure 4-4. Nozzle Limitations
Table 4-7. Kidde Pipe Size Estimating Table
Flow Rate (lb/sec)
Minimum Design Max. Nom. Design
1
2
3.5
6
9
14
20
30
55
90
120
System With A
System With Ceiling
and Subfloor Nozzles
30 ft. Max
Minimum Design
3.0
5.5
8.5
12.5
20.0
30.0
55.0
90.0
125.0
200.0
300.0
4-14
30 ft. Max
Flow Rate (kg/s)
Max. Nom. Design
0.5 1.4
0.9 2.5
1.6 3.9
2.7 5.7
4.1 9.0
6.4 13.6
9.0 25.0
13.6 40.9
25 56.8
40.9 90.9
54.5 136.4
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