Question 1

What is the electrofusion welding process?

Accepted Answer

Electrofusion welding involves the following steps: Preparing the pipe for removing the gaps and cleaning the contaminants, Marking the connection on the pipe, rubbing the pipe surface, Reinforcing and applying strain on pipe or connector, Applied electrical current, Cooling, opening clips, Documentation of the process, Final payment, cleaning and removal of contaminants.

Question 2

HDPE butt fusion fittings & HDPE electrofusion fittings, which one is better?

Accepted Answer

HDPE butt fusion fittings & HDPE electrofusion fittings, both are the most common used HDPE pipe fittings. Material Costs: The HDPE butt fusion fittings are regular much cheaper prices than HDPE electrofusion fittings. The HDPE pipes adopt butt fusion methods, no special coupler fittings needed , so less fittings will be requested, and much lower on material costs. Installation Costs: The HDPE electrofusion fittings can be welded in much simpler way, which can be used for the certain circumstanc

Question 3

Can HDPE electrofusion coupler be used for welding the PPR pipe?

Accepted Answer

No, HDPE electrofusion coupler is manufactured & designed to weld to the HDPE pipeline only, NOT suitable for PPR pipe.

Question 4

Is there any barcode on the electrofusion fittings provided by SUNPLAST?

Accepted Answer

Yes, all HDPE electrofusion fittings are with a barcode on it. The worker on site can use electrofusion machine to scan the barcode, so all welding parameter will be inputting to welding machine automatically.

Question 5

Can electrofusion fittings made by PE100 material weld to the pipe in PE80?

Accepted Answer

Yes, this will be ok. To guarantee the best welding result, we recommend to use PE80 fittings to weld to the PE80 pipe.

Question 6

What's the typical reasons that make the electrofusion welding fail?

Accepted Answer

The majority of fittings that leak do so because of incorrect installation. The three main causes of joint failure when using electrofusion fittings are: Poor joint preparation, Contamination of the joint caused during the jointing process, Misalignment of the pipe within the fitting. So, to achieve the success of electrofusion welding, a well trained installer strictly follow the guide is very important.

Question 7

Is scraping necessary before Electrofusion?

Accepted Answer

Yes, before electrofusion, the installer shall scrap the oxidation layer on both edage of HDPE pipe, the scrap area shall cover the edage of pipe to the marking line on the pipe, which mark insert depth of the electrofusion fittings. This is necessary step.

Question 8

What's the effectiveness of electrofusion welding?

Accepted Answer

The effectiveness of electrofusion depends on attention to preparation of the jointing surfaces and ensuring that the surfaces to be welded have satisfactory contact during the welding and cooling cycles. The pipe surfaces to be fused need to be scraped to remove the surface oxidation layer prior to fusion. To prepare the jointing surfaces the pipe surface must be scraped with an appropriate pipe scraper, as recommended by the pipe or fitting manufacturer, to remove the entire surface of the pip

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