Proven Technology in XL FRIALEN XL large couplers have already proven themselves in practice in many projects worldwide. For the fusion of pipes up to d 900mm, they define the state of the technology. Ring gaps between the pipe and coupler are compensated by the integrated preheating system and the melting pressure is maintained by the outer reinforcement. Thanks to matched equipment such as rounding clamps, scraping and electrofusion units as well as our optimal customer service, these components meet with a wide acceptance at construction sites. The product portfolio includes dimensions up to d 1200mm.