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Butt fusion welding

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Butt fusion welding (or buttwelding) is a thermofusion process which involves the simultaneous heating to a melt state the contact surface of two (thermoplastic) components which are to be joined. The two surfaces are then brought together under controlled pressure for a specific cooling time and homogeneous fusion is formed upon cooling. The resultant joint is resistant to end thrust and has comparable performance under pressure to the pipe.

Buttwelding is a very economical and reliable jointing technique for establishing permanent homogenous joints in PE and HDPE Pressure Pipe systems.

Various buttweld fittings and accessories allow transition to detachable joint systems. Buttwelding is particularly suitable for prefabricating pipe sections with special fittings. On-site, the prefabricated pipe sections may be easily joined, permanently or with detachable joints. It is important to note that only pipes and fittings from the same wall thickness series can be buttwelded together.

Principles, Accessories, Moulded– & Fabricated Fittings

Download the Marley HDPE Buttwelding Principles PDF (640KB) to your machine.

Download the Marley HDPE Buttweld Fittings (moulded) PDF (780KB) to your machine.