MS
Test Pressure

Hydrostatic Test Pressures For Mild Steel (BS 1387/BDS 1031)

Series

and class

of pipe

Nominal Dia

Wall Thickness

 

mm

Out side Diameter

Hydrostatic

Test

Pressure

in

  mm

mm

Max           min

Light Series

Class-A

½                  15

¾                  20

1                      25

                32

                40

2                     50

                65

3                     80

4                    100

2.00

2.35

2.65

2.65

2.90

2.90

3.25

3.25

3.65

21.4             21.0

26.9             26.4

33.8             33.2

42.5             41.9

48.4             47.8

60.2             59.6

76.0             75.2

88.7             87.9

113.9         113.0

710 psi

(50 kg/cm2 )

Medium Series

Class-B

½                  15

¾                  20

1                      25

                32

                40

2                     50

                65

3                     80

4                   100

5                   125

6                   150

2.65

2.65

3.25

3.25

3.25

3.65

3.65

4.05

4.50

4.85

4.85

21.8              21.0

27.3              26.5

34.2              33.3

42.9              42.0

48.8              47.9

60.8              59.7

76.6              75.3

89.5              88.0

115.0          113.1

140.8          138.5

166.5          163.9

710 psi

(50 Kg/cm2)

Heavy Series

½                  15

¾                  20

1                      25

                32

                40

2                     50

                65

3                     80

4                   100

5                   125

6                   150

3.25

3.25

4.05

4.05

4.05

4.50

4.50

4.85

5.40

5.40

5.40

21.8              21.0

27.3              26.5

34.2              33.3

42.9              42.0

48.8              47.9

60.8              59.7

76.6              75.3

89.5              88.0

115.0          113.1

140.8          138.5

166.5          163.9

710 psi

(50 Kg/cm2)

           

 

 

   

© Copyright 2013 National Tubes Ltd.. All rights reserved