Sub-mainlines are designed as per standard poly plot calculations. The following graphs are a quick reference; provided the Sub-mainline is supplying laterals with 5 sprinklers. Graph 7.2 applies to a sub-mainline which supplies laterals to one side only and graph 7.3 to either side of a sub-mainline.
Graph 7.2
Graph 7.3
Nominal
Pipe
Diameter
|
50 mm
|
63 mm |
75 mm
|
90 mm
|
110 mm
|
125 mm
|
140 mm |
Inside
Pipe
Diameter |
46.80 mm
|
59.80 mm
|
71.85mm |
86.15 mm
|
105.4 mm
|
119.8 mm
|
134.1 mm
|
|
Products