PE pipe is used in a variety of projects around the world. Since the 1950s, this type of pipe has provided project managers with significant advantages and in certain applications it is preferred over systems using steel, cement or other materials. This article will explain the classification of PE pipe and the threading pipe in PE pipe.
PE pipes can be divided into the following categories according to their use and production process:
| Type | Main Application |
| PE water pipe | Municipal water supply, rural drinking water pipeline network |
| PE gas pipe | City gas transmission pipeline |
| PE drainage pipe | Municipal sewage, underground drainage |
| PE mining pipe | Coal mines, mines, mud transportation |
| PE threading pipe | Cable protection tube |
| PE irrigation pipe | Agricultural drip irrigation and sprinkler irrigation systems |
| PE corrugated pipe | Sewage discharge, underground pipe gallery |
| Pipeline Type | Price | Corrosion resistance | Flexibility | Connection | Service life |
| PE Pipe | medium | Excellent | Excellent | Hot melt, electric melt | 50 years + |
| PVC pipe | Low | Good | Average | Glue, socket | 30 years |
| Steel pipe | High | Poor | Poor | Welding, flange | 20 years |
| Ductile Iron Pipe | High | Average | Average | Flange, socket | 50 years |
In-depth analysis of PE threading pipe
PE threading pipe is a polyethylene pipe used for the protection of power cables, communication optical cables and signal lines. It has good insulation, corrosion resistance and impact resistance, and is suitable for various buried and overhead laying environments. Compared with traditional PVC threading pipes and metal threading pipes, PE threading pipes are lighter and more durable, and perform well in underground projects and complex construction environments.
Classification of PE threading pipes
PE threading pipes can be divided into the following categories according to the use environment, material structure, production process, etc.:
(1) Classification by use
| Type | Main Application |
| Ordinary PE threading pipe | Suitable for general communication and power line protection |
| Thickened PE threading pipe | Suitable for high-voltage cable protection, increased pressure resistance |
| High-strength PE composite threading pipe | Using steel wire or glass fiber reinforcement to improve strength, suitable for high-load environments |
| PE corrugated threading pipe | With a smooth inner wall and corrugated outer wall structure, improved pressure resistance, suitable for complex terrain |
| Double-layer PE threading pipe | Using double-layer co-extrusion process to improve impact resistance and corrosion resistance |
(2) Classification by structure
Solid wall PE threading pipe: The pipe wall is uniform and the overall structure is tight, which is suitable for ordinary cable protection.
Double wall corrugated PE threading pipe: The outer wall is corrugated to improve the pressure resistance and is suitable for buried laying.
Wire mesh skeleton PE threading pipe: The wire mesh is embedded in the pipe to improve the rigidity of the pipe, which is suitable for high-intensity load occasions.
PE composite threading pipe: PE and other reinforcing materials are co-extruded to improve heat resistance and pressure resistance.
(3) Classification by application scenario
Underground PE conduit: used for underground cable protection, requiring corrosion resistance and pressure resistance.
Overhead PE conduit: used for overhead cable protection, requiring strong weather resistance and not easy to age.
Indoor PE conduit: used for internal wire protection in buildings, requiring good flame retardant properties.
Main characteristics of PE conduit
PE conduit has become the first choice for modern cable protection conduits due to its excellent physical and chemical properties. The following is an analysis of its main characteristics:
(1) Excellent insulation
PE material itself has high resistivity, which can effectively prevent current leakage and improve the safety of cables.
It will not cause short circuit due to moisture or corrosion, and is suitable for long-term underground laying.
(2) Corrosion resistance
It has good acid and alkali resistance, will not be corroded by groundwater and chemical substances, and is suitable for underground use.
Compared with metal conduits, it will not cause pipeline aging due to rust.
(3) Strong impact resistance
High-density polyethylene (HDPE) material can withstand large external impact and is not easy to break.
Suitable for complex terrain, such as tunnels, bridges, and under high-load roads.
(4) Lightweight and easy to construct
PE threading pipe is lighter than PVC and metal pipes, making it easier to carry and install.
It has strong bendability, which reduces the number of connection points during construction and improves construction efficiency.
(5) High and low temperature resistance
It is suitable for environments ranging from -40℃ to 60℃, is not easy to crack or deform, and is suitable for use in cold or high temperature areas.
(6) Long service life
Under normal use, the service life of PE threading pipe can reach more than 50 years, reducing maintenance and replacement costs.
(7) Environmentally friendly and pollution-free
It does not contain harmful substances, can be recycled, and meets modern environmental protection requirements.
Connection methods of PE threading pipe
PE threading pipe has various connection methods, and the following are common ones:
(1) Socket connection
It is suitable for small-diameter threading pipes.
It uses a socket and a socket, which is easy to install and suitable for indoor line laying.
(2) Sleeve connection
The connection strength is improved by connecting the sleeve.
Suitable for underground laying, improving waterproofness and pressure resistance.
(3) Hot-melt butt joint
Applicable to large-diameter PE threading pipesto ensure sealing and connection strength.
The construction cost is relatively high, but the durability is strong and suitable for high-demand projects.
(4) Flange connection
Applicable to connection with other pipeline systems, removable for maintenance.
Applicable to complex pipeline systems and industrial-grade applications.
Application areas of PE threading pipes
PE threading pipes are widely used in municipal engineering, communications, electricity, rail transit, construction and other fields:
(1) Power cable protection
Mainly used for the protection of high-voltage, medium-voltage and low-voltage cables.
Applicable to underground pipelines, cable trays and other projects.
(2) Communication optical cable protection
Used in optical fiber communication networks to prevent optical cables from being damp and under pressure.
Applicable to data centers, communication base stations and other fields.
(3) Municipal pipeline network
Used for the protection of underground pipelines such as roads, electricity, and signal control.
Can be combined with structures such as corrugated pipes to improve durability.
(4) Rail transit
Used for subway, high-speed rail signal cables, and communication optical cables protection.
Suitable for high vibration environments to ensure cable safety.
(5) Construction
Suitable for wire protection in residential and commercial buildings.
Can be buried in walls and underground pipes.
Comparison between PE threading pipe and other threading pipes
| Performance comparison | PE conduit | PVC threading pipe | Metal conduit (galvanized pipe) |
| Corrosion resistance | Excellent (acid and alkali resistant) | General (easy to age) | Poor (easy to rust) |
| Insulation | Excellent (non-conductive) | Good | Poor (conductive, requires additional insulation) |
| Impact resistance | Excellent (not easy to break) | General (easy to break) | Good |
| Flexibility | Excellent (bendable) | Poor (brittle) | Poor (high rigidity) |
| High temperature resistance | Excellent (below 60°C) | General (below 50℃) | Excellent (high temperature resistance) |
| Convenience of construction | Lightweight, easy to install | General | Heavy, complex installation |
| Service life | 50 years+ | 20-30 years | 20 years (easy to corrode) |
| Price | Moderate | Low | High |
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