PE-RT II Butt Fusion Stub End

PE-RT II butt fusion stub end is used to create a flanged transition point in compatible PE-RT II piping systems. It is butt fused to the PE-RT II pipe and used with a compatible backing ring for connection to valves, pumps, equipment or other flanged components.

All Models & Specifications

Available PE-RT II butt fusion stub end sizes are listed below. Please provide the required size and quantity when requesting a quotation.

Size (mm)
63
75
90
110
125
160
180
200
225
250
315

About PE-RT II Butt Fusion Stub End

PE-RT II butt fusion stub end is used to convert a welded PE-RT II pipeline into a detachable flanged connection. The pipe side is joined by butt fusion, while the flange face works together with a compatible backing ring and mating flange.

It is typically used when connecting PE-RT II piping to valves, pumps, heat exchangers, meters or other flanged equipment, and where future disassembly may be required. The backing ring, bolt pattern and mating flange specification should be confirmed for the project.

About PE-RT II Material

PE-RT II (Polyethylene of Raised Temperature Resistance Type II) is a thermoplastic polyethylene material developed for piping systems that must maintain mechanical strength at elevated temperatures. Compared with conventional polyethylene, PE-RT II offers improved long-term temperature resistance while retaining the advantages of a weldable plastic piping material.

Because PE-RT II remains thermoplastic, compatible pipes and fittings can be joined by butt fusion or electrofusion to create a continuous all-plastic welded pipeline system. The material is also valued for corrosion resistance, resistance to internal scaling, relatively low weight, smooth internal surfaces and installation flexibility.

Operating Temperature

PE-RT II is used in hot- and cold-water and heating applications where elevated-temperature performance is required. The exact allowable temperature depends on the pipe and fitting design, SDR or wall thickness, operating pressure and the specified application class. Many PE-RT II piping systems are designed for long-term service in approximately the 70–80°C range, while short-term or maximum design conditions can reach about 95°C. Final temperature and pressure limits should always be confirmed against the actual pipe specification and project design conditions.

Typical Applications

• Secondary district-heating and heat-distribution networks
• Building heating and hot-water circulation systems
• Radiant heating and underfloor heating systems
• HVAC hydronic heating and cooling circuits
• Heat-pump and geothermal circulation systems
• Compatible industrial hot-water and thermal-fluid pipelines
• Other hot- and cold-water piping applications requiring a corrosion-resistant welded plastic system

Selection Considerations

For project selection, the required pipe outside diameter, SDR or wall thickness, design pressure, normal operating temperature, maximum temperature, fluid medium and installation method should be confirmed together. This is especially important for heating networks because allowable pressure changes with operating temperature and intended service life.

Product Details

Applications & Installation

Frequently Asked Questions

What sizes are available?

The listed sizes are 63, 75, 90, 110, 125, 160, 180, 200, 225, 250 and 315 mm.

How is a stub end normally used?

The stub end is butt fused to the PE-RT II pipe and normally used with a compatible backing ring to form a bolted flange connection.

What information should I send for a quotation?

Please send the required sizes, quantities, backing ring or flange requirements if applicable, and delivery destination so we can confirm availability, pricing and lead time.

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