Earthing

[Spark1979]

You can't bury gas pipe work in the concrete foundations of premises due to movements it's in the gas regulations, you can lay in screed as long as it has manufacturers protection on and is at correct depth

 

[Guest111]

You can't bury gas pipe work in the concrete foundations of premises due to movements it's in the gas regulations, you can lay in screed as long as it has manufacturers protection on and is at correct depth

new there was something about not burying it cheers mate.

 

[Des 56]

This is from the European copper board

. Use plastic sheathed copper laid on top of the base concrete and soundness test the installation piping before wrapping any joints and covering with a suitable screed.

Alternatively, pass plastic sheathed soft coiled copper through a larger tube that has been previously set into the concrete.

http://www.ukcopperboard.co.uk/lite...on-Tips/Domestic-gas-installation-testing.pdf

Seems like we need a plumber to decide :wink5:

 

[Spark1979]

As an Niceic approved electrician who is now doing his igq in gas bs6891:2005 states under 8.8.1: installation pipe work shall not be buried in concrete slabs. 8.8.2: rigid stainless steel pipework shall not be buried in concrete screeds. Where a pipe is buried in a concrete screed there shall be a minimum of 25mm of cover above pipe
8.8.3: pipes buried in concrete grounds floors shall be protected against failure caused by movement. Joints shall be kept to a minimum. No compression fittings.

Hence gas pipework must be laid in the screed not concrete foundation!

 

[Des 56]

As an Niceic approved electrician who is now doing his igq in gas bs6891:2005 states under 8.8.1: installation pipe work shall not be buried in concrete slabs. 8.8.2: rigid stainless steel pipework shall not be buried in concrete screeds. Where a pipe is buried in a concrete screed there shall be a minimum of 25mm of cover above pipe
8.8.3: pipes buried in concrete grounds floors shall be protected against failure caused by movement. Joints shall be kept to a minimum. No compression fittings.

Hence gas pipework must be laid in the screed not concrete foundation!

This all Bananas and custard to me, because I know little if anything about the subject

, but your quotation seems to suggest the opposite of your conclusion.
I have underlined what appears to contradict

 

[Spark1979]

Concrete ground floors are the entire floor as a whole. See http://www.greenspec.co.uk/ground-floor-insulation.php for break down of a floor

 

[Engineer54]

I don't know what the building regulations in the UK state now, but screed cover used to be min 4''. So there should not be much of a problem of achieving a min 25mm cover over any pipe or conduit work laid in the screed.

By the way Screed is NOT a concrete mix, it's purely a sand and cement mix, generally a weak one at that!!!

 

[sedgy34]

The floor was block and beam and I think a wet screed but hasn't block and beam got a cavity
The pipes were as 1 branched off and soldered joints wrapped in yellow tape then stabs coming out of the floor were the gas appliances are
The gas regs may have changed now

 

[Engineer54]

Think they use a membrane on block and beam work, and pour the screed mix in top of that!!! Pretty sure that's what they do on the projects i've worked on, but i'll ask our Civil Engineer tomorrow...