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DETERMINING THE INTERNAL DIAMETER

HOW TO DETERMINE THE INTERNAL DIAMETER (I.D.) OF HOSES.

Chart indicating flow rate and velocity from which to determine nominal size

 
 
A Maximum recommended
suction line velocity		 B Maximum recommended
return line velocity		 C Maximum recommended
delivery line velocity
 
How to determine the internal diameter (I.D.) of hoses
Delivery (l/min)
Flow velocity (m/sec)
ND (mm)

EXAMPLE:
Given a flow rate of P= 60 l/min and a velocity V= 5 m/sec,
the nominal size will be I.D.: DN= 16.
Resistances to flow are not considered.
 
delivery (l/min) P = 60
flow velocity (m/sec) V = 5
NOMINAL DIAMETER (mm) DN = 16

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