Attaching a PTFE tube inside a bigger PTFE tube
Home Improvement Asked on January 5, 2021
I have two PTFE tubes:
- A thin one: OD 4mm, ID 2mm
- A thick one: OD 6mm, ID 4mm
The thin one fits inside the thick one, and I want to glue them together so they’ll have a strong connection. Glues don’t work well, because it’s PTFE.
I tried the following:
As you can see, I used heat-shrink tubing for the connection above. This is stronger than glue but still not strong enough, the tubes slip away if pulled hard enough.
I’ve seen all kinds of metal PTFE connectors online, but I can’t figure out which one I should use for this specific task. Can anyone help?
One Answer
I would put a metal sleeve inside the smaller tube then use hose clamps on the outer tube which should produce sufficient compression.
The disadvantage is that these tubes slide easily, but if the pressure is not too high then it will work.
Answered by Solar Mike on January 5, 2021
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