ᐅ When are expansion joints necessary?

Created on: 24 Feb 2020 20:56

Hello,
I am aware of the principle that with copper piping for heating systems (which should be the standard), an expansion joint must be installed every 10 m (33 feet) of pipe length. That sounds logical and I have seen it done before. My question is: Is there a standard, manufacturer’s guideline, or similar regulation that requires this? In other words, is it recommended practice or a mandatory rule? I would appreciate knowledgeable answers.

hegi___25 Feb 2020 20:11

#13

This is also not a problem in the heating sector because there is no pitting corrosion due to the almost complete lack of oxygen in the water.

If the water pipes are going to be renovated anyway, I would completely remove them. In this process, you can of course also replace the heating pipes and have everything new.

I don’t know anyone nowadays who still installs copper pipes under plaster or screed. Leaks practically no longer occur with plastic pipes.

Vicky Pedia26 Feb 2020 08:43

#14

The crucial question was about the expansion of copper pipes when installed exposed on the surface.

hegi___26 Feb 2020 12:26

#15

This cannot be stated in general terms.
The length change is not a problem for the pipe itself but for the endpoints.
There you need to check whether the maximum possible expansion could cause damage.

Deliverer4 Mar 2020 09:10

#16

hegi___ schrieb:

I don’t know anyone nowadays who still installs copper pipes under plaster or screed. Leakages practically don’t occur anymore with plastic pipes.

Now you know one. In two weeks, new 35mm (1.4 inch) copper pipes will be installed as supply and return lines to the heating circuit distributors.

hegi___4 Mar 2020 21:59

#17

Exceptions prove the rule

Vicky Pedia9 Mar 2020 23:21

#18

So what now? It seems like no one knows any regulations or rules?

ᐅ When are expansion joints necessary?

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