Polyethylene Water/Sewer - JM Eagle

perature-measuring device should be used periodically to insure propertemperature of the heating tool face. Additionally, heating tools are usuallyequipped with suspension and alignment guides that center them on thepipe ends. The heater faces that come into contact with the pipe should beclean, oil-free and coated with a nonstick coating as recommended by themanufacturer to prevent molten plastic from sticking to the heater surfaces.Remaining molten plastic can interfere with fusion quality and must be removedaccording to the tool manufacturer’s instructions.Plug in the heater and bring the surface temperatures up to the temperaturerange (400-450 degrees F) (204-232 degrees C). Install the heater in the butt fusionmachine and bring the pipe ends into full contact with the heater. To ensurethat full and proper contact is made between the pipe ends and the heater, theinitial contact should be under moderate pressure. After holding the pressurevery briefly, it should be released without breaking contact. Continue to hold thecomponents in place, without force, while a bead of molten polyethylene developsbetween the heater and the pipe ends. When the proper bead size (seeTable 4) is formed against the heater surfaces, the heater should be removed.Bead Size for Pipe SizesPipe SizeSuggested Bead Size1¼" and smaller 1/32" – 1 /16"1¼" – 3" 1/16"3" – 8" 1/8" – 3 /16"8" – 12" 3/16" – ¼"12" – 24" ¼" – 7 /16"24" – 36" 7/16"36" – 63" 9/16"Table 46.2.5 JoiningAfter the pipe ends have been heated for the proper time, the heater tool isremoved and the molten pipe ends are brought together with sufficient forceto form a double rollback bead against the pipe wall. The fusion force isdetermined by multiplying the interfacial pressure, 60-90 psi (4.14-6.21 bar),HDPE WATER/SEWER PIPING SYSTEM TECHNICAL & INSTALLATION GUIDE31