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HDPE protection pipes for line communication structures

 

Technical characteristics

Protective polyethylene tubes are designed for laying at temperature ranging from -10° to +50°С and operation at temperature from -60° up to +60°С;
Technical characteristics are shown in Table;
Tubes are supplied in coils or in reels.

Design

Tubes have a two-layer structure:

-outer layer is made of polyethylene (HDPE PE- 63 type, PE-80 type with antioxidants and light stabilizer);
-the inner layer is produced of HDPE and sliding additives composition. It provides with solid lubrication and reduces the friction ratio between cable plastic sheath and inner surface of the protective polyethylene tubes to 0.08 values and below. Solid sliding additives are introduced into the internal surface and do not deteriorate their properties during tube service life and are compatible with cable plastic sheathes. Longitudinal riffling of internal surface layer is available;
- Protective polyethylene tubes are colored with 4 longitudinal strips symmetrically placed round the tube and serve for additional color identification. The color of strips is a contrast to the tube main color. Used materials provide 50 years tubes environmental safety and resistance to aggressive environment and substances, contained in the air and in the ground.

Applications

Protective polyethylene tubes are designed for ground laying through water obstacles and also in pipes, units, along bridges and overpasses in the process of cable channeling. They are used for communication cables with plastic sheathes, put inside them (as well as optical ones), while applying traditional approach (using leader cable tightening) and HS compressed-air approach as well.

When cables are laid in tubing, they are better protected from vibration influences and mechanical tension which may occur due to ground deformation or to frozen subsoil process (frost rebound, defrosting movements, frost clefts and so on).

Replacement of cables, placed in tubing does not require earth excavation. It promotes road safety increasing and reduces repair-and-renewal operations expenses.

Tubing increases reliability of cable communication lines, improves maintenance, repair-and-renewal operations conditions.

Cable tubing is provided by using traditional approaches of cable laying (tightening manually or mechanically) and also using the compressed air (using piston or without it).

Table for order

Standard size

Outer diameter, mm

Wall thickness, mm

Weight, kg/m

Long-term stretching loading, кН

Short-term stretching loading, кН

Stability, МPa

Excessive internal pressure, МPа

Construction length, m

Relative lengthening of materials, % (not more)

25/2,3

25±0,3

2,3+0,4

0,17

0,2

2,0

1,5

1,5

4000

200

32/2,5

32±0,3

2,5+0,5

0,24

1,9

3,2

1,3

2,0

3000

200

32/3,0

32±0,3

3,0+0,5

0,28

2,2

3,8

2,1

2,0

3000

200

40/3,0

40±0,4

3,0+0,5

0,35

2,8

4,9

1,1

2,0

2000

200

40/3,5

40±0,3

3,5+0,6

0,41

3,2

5,6

1,3

2,0

2000

200

50/4,0

50±0,5

4,0+0,6

0,58

4,6

8,1

1,4

2,0

1000

200

50/4,5

50±0,5

4,5+0,7

0,65

5,1

9,0

2,0

2,0

1000

200

63/4,0

63±0,6

4,0+0,6

0,75

5,9

10,4

0,7

2,0

700

200

63/5,0

63±0,6

5,0+0,7

0,92

7,3

12,8

1,4

2,0

700

200

110/6,3

110±1,0

6,3+0,9

2,10

16,4

13,0

0,5

2,0

5-12

200

110/10,0

110±1,0

10,0+1,2

3,15

25,1

19,8

1,0

2,0

5-12

200

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