production

Ring stiffness

Nominal inner diameter( DN/ID) (MM)

Average outer diameter

Virtual length(MM)

Weight/ per meter (Kg)

Weight / per pcs(Kg)

HDPE DOUBLE-WALL CORRUGATION PIPE

SN4

225

6000

3.6

21.6

SN4

300

341±2.0

6000

5.15

30.9

SN4

400

445±2.5

6000

8.76

52.56

SN4

500

563±3.0

6000

11.85

71.1

SN4

600

672±3.5

6000

17.51

105.06

SN4

710

800±4.0

6000

26.27

157.62

SN8

225

6000

3.61

21.66

SN8

300

341±2.0

6000

6.18

37.08

SN8

400

445±2.5

6000

10.82

64.92

SN8

500

563±3.0

6000

15.45

92.7

SN8

600

672±3.5

6000

22.25

133.5

SN8

710

800±4.0

6000

31.42

188.52

Nominal Ring stiffness rate Unit: KN/m3

Rate

SN2

SN4

SN 6.3

SN8

SN12.5

SN16

Ring stiffness

2

4

6.3

8

12.5

16

Note: the pipes is limited to be SN2 (De≥500mm) , the figure in the bracket is not preferred.

Physical and chemical property of pipe

Item

Property

Unit

Technical requirement

Physical property

Density

g/cm3

0.941 –0.965

Refraction coefficient

nD

1.54

Water absorption property

％

≤0.01

Mechanical property

Tensile strength

MPA

20—35

Breaking elongation

％

≥350

Pressure resistance strength

MPA

18-25

Bending strength

Mpa

25—40

Elastic modulus

Mpa

≥800

Thermal property

Heat expansion coefficient

10 -5/℃

11-16

Melt point

℃

131

Soften temperature

℃

126

Brittle temperature

℃

-70

Successive temperature

℃

≤60