IS 4985 : 2000 (Extract)

Wall Thickness for working pressure classes (mm)

Outside diameter (mm)

Tolerance on outside diameter (mm)

Class 1 2.5 kg/cm

Class 2 4 kg/cm

Class 3 6 kg/cm

Class 5 10 kg/cm

Plumbing Pipes

(min.)

(max.)

(min.)

(max.)

(min.)

(max.)

(min.)

(max.)

(min.)

(max.)

20

+0.3

1.1

1.5

2.8

3.3

25

+0.3

1.4

1.8

2.9

3.4

32

+0.3

1.8

2.2

3.4

3.9

40

+0.3

1.4

1.8

2.2

2.7

3.6

4.2

50

+0.3

1.7

2.1

2.8

3.3

3.7

4.3

63

+0.3

1.5

1.9

2.2

2.7

3.5

4.1

75

+0.3

1.8

2.2

2.6

3.1

4.2

4.9

90

+0.3

1.3

1.7

2.1

2.6

3.1

3.7

5.0

5.7

110

+0.4

1.6

2.0

2.5

3.0

3.7

4.3

6.1

7.1

125

+0.5

1.8

2.2

2.9

3.4

4.3

5.0

6.9

8.0

140

+0.5

2.0

2.4

3.2

3.8

4.8

5.5

7.7

8.9

160

+0.5

2.3

2.8

3.7

4.3

5.4

6.2

8.8

10.2

180

+0.6

2.6

3.1

4.2

4.9

6.1

7.1

9.9

11.4

200

+0.6

2.9

3.4

4.6

5.3

6.8

7.9

11.0

12.7

225

+0.7

3.3

3.9

5.2

6.0

7.6

8.8

12.4

14.3

250

+0.8

3.6

4.2

5.7

6.5

8.5

9.8

13.8

15.9

280

+0.9

4.1

4.8

6.4

7.4

9.5

11.0

15.4

17.8

315

+1.0

4.6

5.3

7.2

8.3

10.7

12.4

17.3

19.9

355

+1.1

5.1

5.9

8.1

9.4

12.0

13.8

19.6

22.6

400

+1.2

5.8

6.7

9.1

10.5

13.5

15.6

22.0

25.3