Contrifugal Spheroidal Graphite Cast Iron Pipe

Common Gray Iron Pipe

Steel Pipe

T.S(N/mm²)

≥420

150～260

≥400

Bending Strength(N/mm²)

≥590

200～360

≥400

Elongation%)

DN80-1000mm≥10

DN1200-2600mm≥7

Neglected

≥18

Elasticity (N/mm²)

Approx 16×104

Approx 11×10⁴

Approx 16×104

Hardness(HB)

≤230

≤230

Approx 140

Nominal Dia DN(mm)

Hydro Testing Pressure(Mpa)

Gastight Testing Pressure( Mpa)

80≤DN≤300

5.0

0.6

350≤DN≤600

4.0

0.6

700≤DN≤1000

3.2

1100≤DN≤2000

2.5

2200≤DN≤2600

1.8

Size(mm)

Contrifugal Spheroidal Pipe,Class K9

Common Gray Iron Pipe,

Class A

Ratio Between Spheroidal Pipe and Gray Iron Pipe

Thickness(mm)

Laying Length (m/t)

Thickness(mm)

Laying Length(m/t)

100

6.1

63.8

9

42.6

1.49

150

6.3

41.67

9.2

28.41

1.47

200

6.4

30.93

10.1

19.7

1.57

250

6.8

23.53

11

14.56

1.62

300

7.2

18.58

11.9

11.3

1.64

350

7.7

14.89

12.8

9.06

1.64

400

8.1

12.45

13.8

7.38

1.69

450

8.1

10.43

14.7

6.17

1.69

500

9

8.97

15.6

5.24

1.72

600

9.9

6.8

17.4

3.92

1.73

700

10.8

5.34

19.3

3.03

1.76