1.1 ,This specification covers electrofusion polyethylene fittings for use with outside diameter-controlled polyethylene pipe, covered by Specifications D2513, D2737, D3035, F714, F2623, F2769 and crosslinked polyethylene (PEX), covered by Specifications F876 and F2788/F2788M. Requirements for materials, workmanship, and testing performance are included. All requirements for joining PE electrofusion fittings to PE pipe shall also apply to joining PE electrofusion fittings to PEX pipe. Where applicable in this specification “,pipe”, shall mean “,pipe”, or “,tubing.”,