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Direct Bury (DB) 7-way 7/4mm
HDPE Tube Bundle
Direct Bury (DB) 7-way 7/4mm
Product Features
The dimension of tube bundle shall be:
|
1) |
Inner Micro Duct: |
7/4mm |
|
2) |
Outer Diameter: |
23.4mm * 21.6mm (±0.5mm) |
|
3) |
Thickness of sheathing: |
1.2mm |
（Figure 1）
Remarks: Ripcord is optional.
Raw materials:
HDPE of a high-molecular type with the following parameters is used for production of the Tube Bundle:
Melt flow index: 0.1 ～ 0.4 g/10 minutes EN ISO 1133
(190 °C, 2.16 KG)
Density: Min. 0.940 g/cm3 ISO 1183
Tensile strength at yield: Min. 20MPa ISO 527
Elongation at the break: Min 350% ISO 527
Environmental stress crack resist (F50) Min. 96 hours ISO 4599
Construction
1.PE sheath: The outer sheath is manufactured from colored HDPE, halogen free. Normal outer sheath color is orange. Other color is possible upon customer request.
2. Micro duct: The micro duct is manufactured from HDPE, extruded from 100% virgin material. The color shall be blue (central duct), red, green, yellow, white, grey, orange or other customized.
Technical Parameters
Table 1: Mechanical performance of inner micro duct Φ7/4mm
|
Pos. |
Mechanical performance |
Test conditions |
Performance |
Standard |
|
1 |
Tensile strength at yield |
Rate of extension: 100mm/min |
≥500N |
IEC 60794-1-2 Method E1 |
|
2 |
Crush |
Sample length: 250mm Load: 1700N Duration of Max. load: 1 minutes Recovery time: 1 hour |
The outer and inner diameter shall show, under visual examination without damage and no reduction of diameter greater than 15%. |
IEC 60794-1-2 Method E3 |
|
3 |
Kink |
≤70mm |
- |
IEC 60794-1-2 Method E10 |
|
4 |
Impact |
Striking surface radius: 10mm Impact Energy: 1J Number of impact: 3 times Recovery time: 1 hour |
Under visual examination, there shall be no damage to the micro duct. |
IEC 60794-1-2 Method E4 |
|
5 |
Bend radius |
Number of turns: 5 Mandrel diameter: 84mm Mumber of cycles: 3 |
The outer and inner diameter shall show, under visual examination without damage and no reduction of diameter greater than 15%. |
IEC 60794-1-2 Method E11 |
|
6 |
Friction |
/ |
≤0.1 |
M-Line |
Table 2: Mechanical performance of Tube Bundle
|
Pos. |
Item |
Specification |
|
|
1 |
Appearance |
Smooth outer wall (UV-stabilized) without visible impurities; well-proportioned color, no bubbles or cracks; with defined markings on outer wall. |
|
|
2 |
Tensile strength |
Use Pull socks to tension a sample in accordance with table below: Sample length: 1m Tensile speed: 20mm/min Load: 2450N Duration of the tension: 5 min. |
No visual damage or residual deformation greater than 15% of the duct assembly outer diameter. |
|
3 |
Crush Resistance |
A 250mm sample after 1 minute load time and 1 hour recovery time. Load (plate) shall be 2000N. The imprint of the plate on the sheath is not considered as mechanical damage. |
No visual damage or residual deformation greater than 15% of the duct assembly outer diameter. |
|
4 |
Impact |
Striking surface radius shall be 10mm and impact energy 5J. Recovery time shall be one out. The imprint of the striking surface on the microduct is not considered as mechanical damage. |
No visual damage or residual deformation greater than 15% of the duct assembly outer diameter. |
|
5 |
Bend |
Diameter of mandrel shall be 40X OD of sample, 4 turns, 3 cycles. |
No visual damage or residual deformation greater than 15% of the duct assembly outer diameter. |
Storage Temperature
Completed packages of the HDPE Tube Bundle on drums can be stored outdoor max. 6 months upon the date of production.
Storage temperature: -40°C ～ +70°C
Installation temperature: -30°C ～ +50°C
Operating temperature: -40°C ～ +70°C
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