Welded Round Steel Pipe Size Chart

No.

Specification

Wall thickness（mm）

Theoretical weight per meter（kg）

Usual length

Remark

Nominal diameter

Outer diameter(mm)

1

DN15 ( 1/2")

21.3

2.75

1.26

6meters/a pipe

The numbers in the brackets indicate the inch diameter

2

DN20(3/4 ")

26.8

2.75

1.63

3

DN25(1 ")

33.5

3.25

2.42

4

DN32(1-1/4 ")

42.3

3.25

3.13

5

DN40(1-1/2 ")

48

3.5

3.84

6

DN50(2 ")

60

3.5

4.88

7

DN65(2-1/2 ")

75.5

3.75

6.64

8

DN80(3 ")

88.5

4

8.34

9

DN100(4 ")

114

4

10.85

10

DN125(5 ")

140

4.5

15.04

11

DN150(6 ")

165

4.5

17.81

Nominal diameter DN/mm

Outer diameter D*wall thickness ( mm*mm )

Weight per unit length

kg/m

DN200

219*6

31.52

DN250

273*6

39.51

DN300

325*6

47.20

DN350

377*6

54.90

DN400

426*6

62.15

DN450

478*6

69.84