Welding PVC - Temperature Matters!
Why Temperature Matters for Strong Plastic Welds
This video demonstrates how weld temperature directly impacts the strength of PVC plastic welds. Nitrogen welding is one of the fastest and strongest methods for plastic repair, but using the wrong temperature can seriously reduce weld strength.
PVC is a particularly heat-sensitive plastic. Welding it at too high a temperature can scorch the material, even when using nitrogen gas. In this demonstration, we compare welds made at the recommended temperature with those made at a higher-than-recommended setting. Both welds were tested using a tension tester, and the results were clear: welds made at the proper temperature delivered a significantly higher peak load than those welded too hot.
To achieve strong, reliable welds, always use the recommended welder settings. When it comes to plastic welding, hotter is not always better!
Chapters:
Overview: 0:00
About thermoplastics: 0:31
Melting temperatures: 1:00
Welding PVC: 1:25
Tension testing: 1:52
⚠️ Important! ⚠️
Always wear appropriate Personal Protective Equipment (PPE) when performing any repair work.
The duration shown in Polyvance’s repair videos is for demonstration purposes only. It does not reflect the actual time needed to complete a full repair and should not be used for estimating labor or repair times.
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Music:
"Sage" by Slenderbeats
From the YouTube Audio Library
Narration: Rob Rode