November 2020 Vol. 75 No. 11


New Fusion Guides for Gas Piping Available from PPI

The Plastics Pipe Institute has announced two new technical reports that discuss steps for the fusion of polyethylene and PA12 pipe.  

“TR-49 Generic Electrofusion User Guide for Field Joining of Polyethylene Gas Piping” and “TR-50 Generic Butt Fusion Joining Procedure for Field Joining of Polyamaide-12 (PA12) Pipe are available without charge at the association’s Energy Piping Systems Division website.  

“Our new TR-49 report is a step-by-step guide that encompasses our task group’s findings and also contains guidance based on leading gas utility review and the latest research on surface preparation, cleaning and scraping techniques published by the Gas Technology Institute (GTI),” said “For more than four decades, heat fusion of polyethene pipe has provided leak-free joints,” stated Randy Knapp, Ph.D., engineering director of the Energy Piping Systems Division of PPI.  “This user guide is the first of its kind to provide generic industry guidance for electrofusion developed in cooperation with leading gas utilities.” 

The TR-50 guide focuses on one of the newest gas piping materials –Polyamide-12 (PA12) – which is now approved for use in regulated gas applications and is well suited for high-pressure gas installations.  

“This new PPI technical report provides a uniform joining procedure that brings a greater consistency to this aspect of gas pipeline installation, will help to facilitate the pipeline operator’s efforts to qualify the procedure, reduce costs, and simplify DOT’s enforcement duties,” Knapp said.  “It also discusses fusion parameters and visual inspection guidelines specific to PA-12.” 

Additional information can be found at

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