HDPE Silicon Core Pipe

1. Dia: DN63-800mm(2 inch-32 inch).

2. Pressure Class: SDR41, SDR33, SDR26, SDR21, SDR17, SDR13.6, SDR11, SDR9, SDR7.4, SDR6.

3. Pressure Class: PN4, PN5, PN6, PN8, PN10, PN12.5, PN16, PN20, PN25, PN32.

4. Packing: 11.8m, 11.9m, 5.8m, or 5.9m/pcs for straight, 100-200m by coils for DN20-90mm.

5. Delivery: 5-10 days depending on the total quantity.

6. Product inspection: Raw material inspection. Finished product inspection. Third party inspection upon clients request.

Specification	Outside Diameter(mm)		Wall thickness and tolerance/mm	Roundness Tolerance(%)			Standard Length/m	Tolerance of length/%
OD/ID								≥+0.3
(mm)	DN	Tolerance	Standard Thickness	Tolerance	Before coiled	After coiled
32/26	32	0.3	2.5	0.3	≤2	≤3	3000
		0		0
34/28	34	0.3	3	0.3	≤2	≤3	3000
		0		0
40/33	40	0.4	3.5	0.35	≤2.5	≤3.5	2000
		0		0
46/38	46	0.4	4	0.35	≤3	≤5	1500
		0		0
50/41	50	0.5	4.5	0.4	≤3	≤5	1500
		0		0
63/54	63	0.6	5	0.4	≤3	≤5	1000
		0		0

High-density polyethylene silicone core tube (HDPE silicone core tube) is a special plastic pipe used in optical cable communication systems. It is characterized by a layer of solid lubricant (usually silicone or siliceous material) co-extruded on the inner wall of the high-density polyethylene (HDPE) tube to form an inner wall with an ultra-low friction coefficient for laying optical fiber cables.

What is a high-density polyethylene silicone core tube?

High-density polyethylene silicone core tube is a three-layer co-extruded composite tube, generally including the following three-layer structure:

1. Outer layer (HDPE outer shell): provides structural strength and impact resistance, with good corrosion resistance, weather resistance and UV resistance.

2. Middle layer: enhances the overall structure and improves mechanical strength.

3. Inner layer (silicon core layer): extruded solid silicone lubricating layer with extremely low friction coefficient, which helps the optical cable to be smoothly laid in the pipeline and reduce wear.

HDPE silicon core pipes are widely used for optical fiber and communication cable protection. Their unique structure—featuring a low-friction silicone inner layer—offers many performance benefits in modern infrastructure projects.

1. Ultra-Low Friction Coefficient

The silicone core provides a permanently smooth inner surface, making it extremely easy to blow or pull optical cables through the pipe—even over long distances.

2. Excellent Corrosion Resistance

Made from high-density polyethylene (HDPE), the pipe resists acids, alkalis, and salts, making it suitable for harsh underground and coastal environments.

3. High Durability & Weather Resistance

Performs well under extreme temperatures (from -40°C to +80°C) and resists UV degradation, ensuring long-term reliability for outdoor installations.

4. Strong & Flexible

Combines high impact strength with flexibility, allowing for easier installation and fewer breakages—even on uneven terrain.

5. Long Coil Length, Fewer Joints

Available in long continuous lengths (500m, 1000m+), reducing connection points and installation time while improving sealing reliability.

6. Long Service Life

Engineered for a lifespan of up to 50 years under normal conditions, minimizing long-term maintenance and replacement costs.

7. Easy Color Identification

Available in various colors (orange, blue, black, etc.) with optional stripes—ideal for multi-channel network systems and easy field management.

FAQ

1. What is an HDPE silicon core pipe?

It is a type of HDPE conduit with a solid silicone lubricant core lining inside the wall. This design reduces friction and makes it easier to install optical fiber cables over long distances.

2. What are the typical applications of HDPE silicon core pipes?

These pipes are widely used for protecting fiber optic cables in telecommunication networks, highways, railway signal systems, electric power communication, and urban broadband infrastructure.

3. What sizes are available for HDPE silicon core pipes?

Common sizes include 32/26mm, 40/33mm, 50/41mm, and 63/54mm (Outer/Inner Diameter), with wall thickness and coil lengths depending on project requirements.

4. Why is there a silicon core inside the pipe?

The silicon core provides a permanently lubricated inner surface that reduces the friction coefficient to as low as 0.1, making cable pulling smoother and minimizing damage to optical cables.

5. What is the typical service life of HDPE silicon core pipe?

When properly installed, the lifespan can exceed 50 years under normal underground conditions.

6. Can HDPE silicon core pipes be used in extreme temperatures?

Yes, they are resistant to both high and low temperatures, typically ranging from -40°C to +80°C, and they maintain performance in diverse environments.

7. Is it possible to customize the color and marking on the pipe?

Yes, manufacturers usually offer customization options including color (black, orange, blue, etc.), stripe colors, and logo printing based on customer requirements.

8. How is the pipe typically packaged for shipping?

HDPE silicon core pipes are usually coiled in lengths of 100m, 200m, or 1000m and packed with plastic film or on iron/wooden reels for protection during transit.

9. What standards do HDPE silicon core pipes comply with?

Most pipes comply with standards like ISO/IEC 14763-2, GB/T 20041, and can meet specific telecom engineering requirements.

10. Can these pipes be used for non-telecom applications?

Yes, though they are optimized for optical cable protection, they can also be used for low-voltage wiring ducts or other applications requiring a smooth conduit.