The Effects of Assembly Torque and Polyethylene Pipe Insertion Depth on Service Head Adapter Performance, 5th International Symposium on Fire Investigations Science and Technology, National Association of Fire Investigators

Polyethylene (PE) pipe has been used as a proven means of conveying and distributing fuel gases since the 1960s.1 In the United States and Canada, PE pipe accounts for over 90% of the natural gas distribution system and has become the de facto industry standard. Although PE pipe is so prevalent, industry codes and regulations do not allow plastic pipe to be installed within a structure as a suitable means to convey fuel gas. Therefore, a coupling or fitting is used to transition from the exterior PE pipe to the metallic pipe
associated with distribution within a structure.