Types of PE Pipe Fittings

What are PE pipe fittings?

PE pipe fittings are connection accessories used in conjunction with PE pipes, and are mainly used for pipe connection, diversion, diversion, transition, etc. in water supply, gas, agricultural irrigation, sewage and other systems.

Types of PE Pipe Fittings – Classified by Connection Method and Function

PE (Polyethylene) pipe fittings are essential components in piping systems for water supply, gas distribution, and industrial applications. These fittings are categorized based on how they connect to PE pipes and their structural functions. This guide explains all major types of PE pipe fittings, with common models and application scenarios.

I. Classification by Connection Method

1. Butt Fusion Fittings

Butt fusion is a welding technique used for medium to large diameter PE pipes, ideal for high-pressure systems.

Common Types:

Butt Fusion Elbow (90° / 45°)

Butt Fusion Tee

Butt Fusion Reducer

Butt Fusion Flange Adapter

Applications:

Municipal water supply projects

Industrial and mining drainage systems

2. Electrofusion Fittings  

Electrofusion fittings use built-in resistance wires to melt and fuse the fitting with the PE pipe. They are suitable for underground pipeline repairs and gas piping systems.

Common Types:

Electrofusion Coupler

Electrofusion Elbow

Electrofusion Tee

Electrofusion Reducer

Electrofusion Flange Adapter, End Cap

Applications:

PE gas pipeline networks

High-standard drinking water supply systems

3. Socket Fusion Fittings  

Socket fusion is commonly used for small-diameter PE pipes. The pipe and fitting are heated and then socketed together.

Common Types:

Socket Fusion Elbow

Socket Fusion Tee

Socket Fusion Coupler

Socket Threaded Adapter (Male/Female)

Applications:

Household plumbing

Small-scale water distribution systems

4. Mechanical Fittings  

Mechanical fittings are non-welded, easy-to-install components ideal for temporary or movable PE pipe connections.

Common Types:

Compression Fittings

Quick Couplings

Clamp Saddle Fittings

Applications:

Agricultural irrigation systems

Temporary water supply setups

Field repairs

II. Classification by Function

1. Same-size Fittings  

Used to connect PE pipes of the same diameter for smooth and continuous flow.

Examples:

Equal Tee

Equal Elbow

Equal Coupler

2. Reducing Fittings  

Used to connect pipes of different diameters, allowing smooth transitions and pressure control.

Examples:

Reducing Tee

Reducer Coupling

Reducing Elbow

3. Transition Fittings  

Designed to connect PE pipes with other materials, such as metal pipes, valves, and pumps.

Examples:

Male/Female Threaded Brass Insert Fittings

PE to Flange Adapter

PE pipe joining procedure

If you plan to join PE pipes, you need to hire a professional to do it. If you handle the PE pipe joining procedure yourself, follow these steps:

Step 1: Prepare a flat surface to place the pipe. Leave a 20 mm cutting allowance.

Step 2: Select a suitable clamp for clamping. The choice of clamp depends on the type of pipe you are using.

Step 3: Center the end faces of the pipes to be welded. It is important to ensure that the offset does not exceed 10% to avoid poor welding results.

Step 4: The next step is to heat the two pipes, and the heating temperature is between 2100-2300 degrees Fahrenheit depending on the season. The recommended melting length for each pipe is 1-2 mm.

Step 5: Remove the heating plate and bring the two pipe ends into contact. Make sure to maintain the required pressure. The switching process should not take too long.

Step 6: Let the welded pipes cool, but make sure to maintain the butt pressure.

Hot melting is the process of heating two PE pipes using a hot melt machine.

Electric fusion is the process of installing a heating wire and connecting it to the outer pipe column.

Welding connection is the process of connecting PE pipes together using a welding machine.

From butt fusion to mechanical fittings, each type of PE pipe fitting serves a unique purpose in modern pipeline installations. Whether you’re designing a high-pressure municipal network or a simple irrigation system, choosing the right fittings ensures system integrity and long-term performance. Explore our full range of PE fittings or contact us for customized solutions and technical support.