Useful Information

Pipe Classification:

PN 10 16 20 25
SDR 11 7.4 6 5
S 5 3.2 2.5 2

Where:

PN: Nominal Pressure in Bar

SDR: Standard Dimension Ratio which is the ratio between the pipe outside diameter and the wall thickness.

S: Dimensionless number which calculated as follows:

S=1/2*[(d/t)-1]

where:

d: is the pipe outside diameter

t: is the wall thickness.

Dimensions: 

mm 20 25 32 40 50 63 75 90 110
INCH 1/2 3/4 1 1.1/4 1.1/2 2 2.1/2 3 4