3PE Straight Steel-to-PE Transition Fitting

The Straight Steel-to-PE Transition Fitting is designed for reliable connection between polyethylene (PE) piping systems and steel pipelines. One end features a PE straight pipe structure, while the other end is equipped with a steel connection, enabling seamless transition between PE pipes and galvanized steel pipes, seamless steel pipes, or gas steel pipelines.

Manufactured using an integrated composite molding process, the fitting supports butt fusion welding on the PE side and threaded or flange connection on the steel side. Available in a wide range of sizes, the product is suitable for standard pipeline diameters used in water supply, gas distribution, and industrial piping systems.

The Straight Steel-to-PE Transition Fitting effectively solves compatibility challenges between plastic and metal pipelines, including pressure matching, material transition, and sealing reliability. It is widely used in gas service connections, municipal pipeline upgrades, residential riser systems, water supply networks, and mixed-material pipeline projects. Suitable for both buried and above-ground installations, it is an essential component for modern piping systems.

Product Specifications

Product Name	Straight Steel-to-PE Transition Fitting
Connection Type	PE Butt Fusion + Steel Threaded/Flange Connection
PE Material	PE100 / HDPE
Steel Surface Treatment	3PE Anti-Corrosion Coating
Installation Type	Buried or Above Ground
Application Media	Water, Gas, Industrial Fluids
Available Sizes	Multiple Standard Sizes Available

Key Features & Benefits

Smooth Transition Between PE and Steel Pipes

Designed for direct connection between PE pipelines and various steel pipe systems, the fitting offers excellent compatibility for gas, water supply, and industrial fluid transport applications. It simplifies mixed-material pipeline installation and renovation projects.

Reliable Sealing Performance

The fitting utilizes a reinforced composite sealing structure to ensure tight bonding between the PE and steel sections. It provides excellent resistance against water pressure and gas pressure fluctuations, preventing leakage and maintaining long-term sealing stability.

High Mechanical Strength

The steel section delivers outstanding mechanical performance, including impact resistance, compression resistance, and bending resistance. The fitting can withstand demanding working pressures and external stress commonly found in underground and industrial pipeline environments.

Corrosion & Aging Resistance

The PE section retains the excellent corrosion resistance and chemical stability of polyethylene, while the steel side is treated with anti-corrosion protection to prevent rust and environmental damage. The overall structure ensures a long service life even in harsh conditions.

Fast & Efficient Installation

The PE end can be directly connected through standard butt fusion welding, while the steel end supports common threaded or flange connection methods. The simplified installation process reduces labor time and improves onsite efficiency.

Strong Integrated Structure

The steel and PE sections are tightly bonded into a single integrated body, providing excellent pull-out resistance and structural stability. The fitting maintains reliable performance under pipeline stress and pressure changes.

Excellent Temperature Adaptability

The fitting performs reliably under varying outdoor temperatures and demanding installation environments. It resists deformation and sealing failure caused by thermal expansion or contraction.

Full Range of Sizes Available

A complete range of specifications is available to match standard PE pipes and steel pipeline systems, making the product suitable for municipal engineering, residential utility networks, and industrial infrastructure projects.

3PE Anti-Corrosion Protection

The steel base on one end is coated with a three-layer polyethylene (3PE) anti-corrosion system, while the steel-to-PE bonding area is integrally sealed during manufacturing.

Superior Corrosion Protection

The 3PE coating provides excellent waterproofing, insulation, and soil corrosion resistance. It effectively protects the steel surface from moisture, chemicals, and underground corrosion, making it ideal for buried pipeline applications and humid environments.

Excellent Electrical Insulation

The insulated 3PE coating helps prevent electrochemical corrosion caused by stray currents or contact between different metal materials, significantly extending the service life of both the fitting and the entire pipeline system.