If a 3/4 iron gas pipe runs in the screed it needs to be protected from
corrosion with a wrapping of Denso tape, is there any guidance on tape
overlap?
Are there any special requirements if a join is unavoidable?

Dave

"Dave" wrote in message
...
If a 3/4 iron gas pipe runs in the screed it needs to be protected from
corrosion with a wrapping of Denso tape, is there any guidance on tape
overlap?
Are there any special requirements if a join is unavoidable?

Dave


It's always better to have such pipework inside a non-corrosive plastic
sleeving of some sort. Denso tape eventually dries out and becomes brittle,
so loses its protective properties.

The tape or sleeving must overlap the plaster or mortar by at least 30mm on
either side to be any kind of use in these situations. Or it must have a
hard plug type seal fitted to the ends to stop moisture ingress in wet
areas.

On Fri, 26 Nov 2004 20:23:40 +0000, BigWallop wrote:


"Dave" wrote in message
...
If a 3/4 iron gas pipe runs in the screed it needs to be protected from
corrosion with a wrapping of Denso tape, is there any guidance on tape
overlap?
Are there any special requirements if a join is unavoidable?

Dave


It's always better to have such pipework inside a non-corrosive plastic
sleeving of some sort. Denso tape eventually dries out and becomes brittle,
so loses its protective properties.

The tape or sleeving must overlap the plaster or mortar by at least 30mm on
either side to be any kind of use in these situations. Or it must have a
hard plug type seal fitted to the ends to stop moisture ingress in wet
areas.

And it must be tested for gas tightness before the protection is applied.


--
Ed Sirett - Property maintainer and registered gas fitter.
The FAQ for uk.diy is at www.diyfaq.org.uk
Gas fitting FAQ http://www.makewrite.demon.co.uk/GasFitting.html
Sealed CH FAQ http://www.makewrite.demon.co.uk/SealedCH.html