DIN 2440 Medium-weight threaded steel tubes. - DIN Standard Material - Hebei Haihao High-Pressure Flange & Pipe Fittings Group Co.,Ltd.

DIN 2440 Medium-weight threaded steel tubes.

DIN 2440 STEEL TUBES MEDIUM WEIGHT SUITABLE FOR SCREWING

1. SCOPE

This Standard applies to medium-weight tubes suitable for screwing. They are suitable for nominal pressure 2 for liquids and nominal pressure 10 for air nd non-hazardous gases.

2. Other relevant Standards

DIN 2444 Zinc coatings on steel tubes; quality standard for the hot galvanizing of steel tubes for installation purposes

DIN 2999 Part 1 Whitworth pipe threads for tubes and fittings; cylindrical internal thread and conical external

DIN 17100 Steels for general structural purposes; quality specifications

DIN 50136 Testing of metallic materials; flattenin test on tubes.

3. Dimensions, designation

Designation of a medium-weight tube suitable for screwing, nominal width 40, seamlesly gavenized(B), in manufacturing lengths:

Table 1. Threaded tube DIN 2440 – DN 40-seamless B

Nominall width

Conn-
ecting
nomin-
al width
of the
flttings
according
to DIN
2950 and
DIN 2980

Whit-
worth-
pipe
threads
according
to
DIN
2999
Part1

Tube

Screw thread

Corresponding
socket according
to DIN 2986

Outside
diameterd1

Wall
thick-
nesss

Weight

Theo-
retical
screw
thread
diameter
d2

Threads
per
25.4mm

Usable
screw
thread
length
J
min
at
a
max.

Distance of
screw thread
dlameter
d2
from tube end

Outside
diameter

Length

Plain-end
tube
kg/m

socketed
tubekg/m

a
max.

a
min.

min.

1/8

R 1/8

10.2

2.0

0.407

0.410

9.728

7.4

4.9

3.1

1/4

R 1/4

13.5

2.35

0.650

0.654

13.157

11.0

7.3

4.7

15.4

3/8

R 3/8

17.2

2.65

0.852

0.858

16.662

11.4

7.7

5.1

21.3

1/2

R 1/2

21.3

2.65

1.22

1.23

20.955

15.0

10.0

6.4

26.4

3/4

R 3/5

26.9

2.65

1.58

1.59

26.441

16.3

11.3

7.7

31.8

R 1

33.7

3.25

2.44

2.46

33.249

19.1

12.7

8.1

39.5

1 1/4

R 1 1/4

42.4

3.25

3.14

3.17

41.910

21.4

15.0

10.4

48.3

1 1/2

R 1 1/2

48.3

3.25

3.61

3.64

47.803

21.4

15.0

10.4

54.5

R 2

60.3

3.65

5.10

5.17

59.614

25.7

18.2

13.6

66.3

2 1/2

R 2 1/2

76.1

3.65

6.51

6.63

75.184

30.2

21.0

14.0

R 3

88.9

4.05

8.47

8.64

87.884

33.3

241

17.1

100

114.3

4.5

12.1

12.4

113.030

39.3

28.9

21.9

122

125

R 5

139.7

4.85

16.2

138.430

43.6

32.1

25.1

147

150

R 6

165.1

4.85

19.2

19.8

163.830

43.6

32.1

25.1

174

1) Referred to an average length of 6m

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