ISO STANDARD FOR MILD STEEL TUBES [EXTRACT FROM ISO-65-2981 (E)]

DN

Designation of thread

Outside Diameter D mm

Thickness (T) and masses per unit length (M) according to the series

Heavy Series

Medium Series

Light Series 1

Light Series 2

T mm

Screwed Socketed M kg/m

T mm

Screwed Socketed M kg/m

T mm

Screwed Socketed M kg/m

T mm

Screwed Socketed M kg/m

15

½

21.3

3.2

1.45

2.6

1.22

2.3

1.09

2.0

0.956

20

¾

26.9

3.2

1.88

2.6

1.57

2.3

1.40

2.3

1.39

26

1

33.7

4.0

2.95

3.2

2.43

2.9

2.22

2.6

2.00

32

1¼

42.4

4.0

3.82

3.2

3.13

2.9

2.85

2.6

2.57

40

1½

48.3

4.0

4.41

3.2

3.60

2.9

3.28

2.9

3.27

50

2

60.3

4.5

6.26

3.6

5.10

3.2

4.56

2.9

4.15

65

2½

76.1

4.5

8.05

3.6

6.54

3.2

5.85

3.2

5.83

80

3

88.9

5.0

10.5

4.0

8.53

3.6

7.72

3.2

6.89

100

4

114.3

5.4

14.8

4.5

12.5

4.0

11.1

3.6

10.0

125

5

139.7

5.4

18.4

5.0

17.1

150

6

165.1

5.4

21.9

5.0

20.4

Tolerances