How to intuitively judge whether an electrofusion welded joint is qualified?

After welding and natural cooling, the joint quality can be preliminarily judged through visual inspection.

Time:

2026-07-31

Author:

After welding and natural cooling, the joint quality can be preliminarily judged through visual inspection.

First, check the observation hole of the fitting; a qualified joint should show a small amount of PE material pushed out, but the overflow must not be in a flowing state.

Second, there should be no large-scale overflow of molten material around the ends of the fitting.

Third, inspect the resistance wires inside the fitting; they should not be squeezed out, exposed, or misaligned.

Finally, the scraping marks on the pipe surface should be uniform and clear, and the insertion depth mark should align with the end of the fitting. If any abnormalities occur, such as smoking, material ejection, or deformation of the fitting, the joint must be deemed unqualified and reworked.

More Information

What are the most critical construction steps during the electrofusion welding process?

The core of electrofusion welding lies in "cleaning, scraping, alignment, fixing, and cooling." Among these, scraping off the oxide layer is the most critical step.

2026-09-10

What are the key requirements for matching electrofusion fittings with pipes?

Same polymer family: Fittings and pipes must be polyethylene (PE). Do not mix PE with PVC, PP or other plastics.

2026-07-31

What are the compatibility requirements for electrofusion fittings?

The compatibility requirements for electrofusion fittings primarily include the following aspects:

2026-07-31

How to correctly select and match the specifications and materials of electrofusion fittings?

When selecting electrofusion fittings, the primary principle is to ensure a perfect match between the fitting and the pipe.

2026-07-31

What are the most critical construction steps during the electrofusion welding process?

The core of electrofusion welding lies in "cleaning, scraping, alignment, fixing, and cooling." Among these, scraping off the oxide layer is the most critical step.