Electro-Fusion fittings

[CMcM]

Friday i was doing 3x bore holes to a manifold chamber + runs back into a house, everything done in 40mm HDPE pipe using Electro-Fusion fittings for the connections for the manifold. Before fitting the Electro-Fusion joints the pipes was scrapped and cleaned as well as making sure the fitting itself was clean including the nipples to connect the fusion welder to. about 40% of the fittings done didnt melt to the pipe or the "nipple" indicatiors didnt rise to show its complete but the fitting was very hot to touch. Each one was done the same yet 40% didnt work.
I flung the non welded fittings away and replaced with another one. Could i of kept trying the failed fitting till it worked? and what are you doing when the pipes have had water in them? still ok to weld or use compressions?

Thanks

 

[markfxy]

did you use a cleaning fluid on pipe and joints or just wipe clean?

 

[CMcM]

They were wipped clean with wipes i got from drain centre for specially cleaning fusion fittings. just donno if it was a bad batch of fittings and if anyone else had had this problem

 

[peteheat]

This might help

EF Welding a Tee using Holding Clamps - YouTube

 

[CMcM]

the fitting that i thought were dodgy were down to the onsite small pertol generator, when other power tool were being used the power to the fusion welding maching was not up at the full power it needed to melt the fitting, i just got lucky with my timing on some fitting and not the rest. Lesson learned! dont share wee generators when doing fusion welding.:bulb2:

Thanks

 

[on31ll]

just a quick one how often do you guiys use electro-fusion fittings ? and on what applications ? thanks