![]() ![]() Peeling should be done only in the area of the heating spiral zone, or the area to be covered by the coupling itself. The tool should remove approximately 0.2 mm or 0.008 inches of the exterior of the pipe on each pass. A rotating peeling device with a constant wall thickness removal should be employed. Peeling the pipe involves removing some of the exterior of the pipe material to allow the pipe to be smoothly inserted into the electrofusion coupling. If the pipe exceeds this, then rounding tools or circumferential clamps may be necessary to keep the pipe within the tolerance during the electrofusion process.Īfter the pipe is cut the next step is to peel the pipe. The out-of-roundness of the pipe should not exceed 1.5% of the pipe outside diameter or a maximum of 3 mm, 0.118 inches in the welding area. If conical depression is occurring, use another method of cutting the pipe or sharpen the cutter. If the conical collapsing is enough to cause the pipe to not make contact with the heater spirals, the joint will be insufficient and may fail.įigure 1: Proper cutting of the pipe is essential to good fusion This also happens when the cutter is dull. ![]() Some cutters will depress the ends of the pipe when cutting. The first and most important step in making a correct electrofusion connection is to ensure that the pipe ends to be joined are cut square and perpendicular to the length of the pipe. The purpose of this bulletin is to give a little more detail into the preparation, process and expected results of electrofusion couplings.Įlectrofusion couplings can be used in some cases where normal fusion equipment cannot be used because of space or height restrictions or when making a final connection in a small space where the rest of the piping is already rigidly in place. Aquaterm 2016 manual#The installer manual has several pages dedicated to the proper steps to be taken in making an electrofusion connection. An electrical current is applied to the coupling causing heat to be generated in the coils, melting the PPR of the coupling and the pipe together, forming the fusion bond. ![]() It entails using a coupling that is wound with heating element wires embedded in PP-R, which can be slipped over two ends of pipes to be joined. Electrofusion is another technique for joining Aquatherm pipe (PP-R, RP(RCT)) 2. ![]()
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