Direct Bury (DB) 4-way 14/10mm

HDPE Tube Bundle

Direct Bury (DB) 4-way 14/10mm

A bundle of micro- or mini-tubes with strengthened wall thickness is encased in a single thin HDPE sheath, forming a duct assembly specifically engineered for fiber optical cable deployment. This robust design enables versatile installation—either retrofitted into existing ducts or directly buried underground—supporting seamless integration into fiber optical cable networks.

The micro ducts are optimized for high-efficiency fiber optical cable blowing, featuring an ultra-smooth inner surface with low-friction properties to minimize resistance during air-assisted cable insertion. Each micro duct is color-coded per Figure 1, facilitating quick identification and routing of fiber optical cable types (e.g., single-mode, multi-mode) during network installation and maintenance.

Product Detail

FAQ

Product Tags

Product Features

The dimension of tube bundle shall be:

1)	Inner Micro Duct:	14/10mm
2)	Outer Diameter:	30.4mm * 30.4mm (±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 Φ14/10mm

Pos.	Mechanical performance	Test conditions	Performance	Standard
1	Tensile strength at yield	Rate of extension: 100mm/min	≥1400N	IEC 60794-1-2 Method E1
2	Crush	Sample length: 250mm Load: 1400N 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	≤140mm	-	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: 168mm Number 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: 4000N 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.
Pos.	Item	Specification
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 micro duct 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

Products Recommended

Ear-Lokt Stainless Steel Buckle

Stainless steel buckles are manufactured from high quality type 200, type 202, type 304, or type 316 stainless steel to match the stainless steel strip. Buckles are generally used for heavy duty banding or strapping. OYI can emboss customers’ brand or logo onto the buckles. The core feature of the stainless steel buckle is its strength. This feature is due to the single stainless steel pressing design, which allows for construction without joins or seams. The buckles are available in matching 1/4″, 3/8″, 1/2″, 5/8″, and 3/4″ widths and, with the exception of the 1/2″ buckles, accommodate the double-wrap application to solve heavier duty clamping requirements.

VIEW MORE
SFP-ETRx-4

OPT-ETRx-4 Copper Small Form Pluggable (SFP) transceivers are based on the SFP Multi Source Agreement (MSA). They are compatible with the Gigabit Ethernet standards as specified in IEEE STD 802.3. The 10/100/1000 BASE-T physical layer IC (PHY) can be accessed via 12C, allowing access to all PHY settings and features. The OPT-ETRx-4 is compatible with 1000BASE-X auto-negotiation, and have a link indication feature. PHY is disabled when TX disable is high or open.

VIEW MORE
OPGW Optical Ground Wire

The central tube OPGW is made of stainless steel (aluminum pipe) fiber unit in the center and aluminum clad steel wire stranding process in the outer layer. The product is suitable for the operation of single tube optical fiber unit.

VIEW MORE
Double FRP reinforced non-metallic central bund...

The structure of the GYFXTBY optical cable consists of multiple (1-12 cores) 250μm colored optical fibers (single-mode or multimode optical fibers) that are enclosed in a loose tube made of high-modulus plastic and filled with waterproof compound. A non-metallic tensile element (FRP) is placed on both sides of the bundle tube, and a tearing rope is placed on the outer layer of the bundle tube. Then, the loose tube and two non-metallic reinforcements form a structure that is extruded with high-density polyethylene (PE) to create an arc runway optical cable.

VIEW MORE
Wire Rope Thimbles

Thimble is a tool that is made to maintain the shape of a wire rope sling eye in order to keep it safe from various pulling, friction, and pounding. Additionally, this thimble also has the function of protecting the wire rope sling from being crushed and eroded, allowing the wire rope to last longer and be used more frequently. Thimbles have two main uses in our daily lives. One is for wire rope, and the other is for guy grip. They are called wire rope thimbles and guy thimbles. Below is a picture showing the application of wire rope rigging.

VIEW MORE
Drop Wire Clamp B& C Type

Polyamide clamp is a type of plastic cable clamp, Product use high-quality UV resistant thermoplastic processed by injection molding technology, which is widely used to support Telephone cable or butterfly introduction fiber optical cable at span clamps, drive hooks and various drop attachments. Polyamide clamp consists of three parts: a shell, a shim and a wedge equipped. The working load on the support wire is effectively reduced by the insulated drop wire clamp. It’s characterized by good corrosion resistant performance, good insulating property, and long-life service.

VIEW MORE

If you're looking for a reliable, high-speed fibre optic cable solution, look no further than OYI. Contact us now to see how we can help you stay connected and take your business to the next level.

INQUIRE