[3 & 4 ]
Out side Diamter
Normal Size
Inch
mm
1/8
DN6
0.38"
9.7
1/4
DN8
0.51"
13.2
3/8
DN10
0.65"
16.7
1/2
DN15
0.82"
21
3/4
DN20
1.04"
26.5
1
DN25
1.31"
33.2
1-1/4
DN32
1.65"
41.9
1-1/2
DN40
1.88"
47.8
2
DN50
2.35"
59.6
2-1/2
DN65
2.96"
75.2
3
DN80
3.46"
87.9
4
DN100
4.45"
113