Clamping and alignment (fitting restraint): Pipe movement during welding and cooling cycles might occur as well as sources of stress and strain that can be applied on the pipe/fitting assembly. Such phenomena might adversely affect the welding process and must therefore be eliminated. All ElectroFusion socket fittings (regardless of the manufacturer) must be clamped to the pipes in order to restrain such movement/forces which may affect the welding result. The use of clamps that will keep the assembly stationary during the weld and cool cycles will help ensure good weld integrity. Mark the insertion depth on the clean scraped pipe. Ensure that the mark on the pipe reaches the fitting edge when pipe is inserted. It is very important to make sure that the pipes are in place prior to tightening the clamps.
Example of clamping and alignment device
1. Misaligned pipes 2. Example of clamping and alignment device
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