TECHNICAL MANUAL - Sharq.biz

weldingConnect the plugs of the control unit to theterminals of the fitting and proceed with theset-up of the welding parameters accordingto the instructions of the welding unit.N.B.: If there is an accidental interruption ofthe welding cycle, the operation can onlybe repeated after the electrofusion jointhas been totally cooled.When the fusion cycle is completed, verifythe fusion indicators coming out.WARNING: the coming out of the fusionindicators cannot be the guarantee of goodsuccess of the welding. This is exclusivelyindication of the material fusion.coolingGenerally the cooling time of the jointing can vary, according to the diameterand fitting type, from 10 up to 30 minutes and anyway it is always shown bythe fitting manufacturer. During this time, the joint cannot be either moved,or removed from the aligning clamp, or stressed. At fusion cycle end, it isadvisable to write with a colored pen or wax pencil the time when the jointingwill be completely cooled.It is absolutely forbidden the use of external cooling methods (water, compressedair, etc) to speed up the cooling.In any case, the pipeline can be put into pressure not before 2 hours from thelast fitting welding.The welding parameters used for the jointing of each fitting must be recorded ina proper report.44