How deep Gas pipe in concrete floor?

[nyck]

I'm having a gas pipe extended to the other side of my kitchen for a cooker so need to cut a channel in my concrete floor.The Gas man is coming Thursday to do the work but i cant remember how deep he said the cut the channel .He's away on holiday so cant ask him.The old Steel pipe is only just below the surface.I've made it 2" so far
Will the new pipe be 15mm

thanks nyck

 

[Steady]

40mm deep.

 

[doitall]

40mm deep.

Where did you read that

 

[namsag]

40mm is the depth below concrete slabs when pipe is run ouside.inside it says 25mm minimum cover above pipe

 

[WDIK]

25mm + 15mm = 40mm



sorry I'll just my coat


Taxi!!

 

[doitall]

25mm + 15mm = 40mm



sorry I'll just my coat


Taxi!!

Corgi Essential Gas Safety doesn't give a cover, they show it on the slab, and say it will take the shortest route, there will be no joints, and it will be protected

 

[namsag]

DIA edition 4 page 115 gives a depth of coverin in a picture. so 40mm would be about right for 15mm pipe not allowing for protective cover around pipe

 

[doitall]

DIA edition 4 page 115 gives a depth of coverin in a picture. so 40mm would be about right for 15mm pipe not allowing for protective cover around pipe

I haven't got an edition on mine probably as old as me then

Its another of them questions where common sense should be all thats needed.

 

[nyck]

I thought he said 100mm and my bulider mate thought as deep as the screed ie:50mm thats why i asked ,i managed to cut a bit more so its 60-75mm .i've got some Metal box conduit would that class as protection for the pipe if the depths not enough?

I'll find out thursday

thanks nyck

 

[namsag]

DIA those tablets of stone must weigh a fair bit.

 

[kirkgas]

taken from the relevant BS (6891 i think) a gas pipe laid in concrete must be corrosion protected and covered by minimum 25mm screed so the depth of the channel depends on the pipe diameter and the thickness of the corrosion protection

 

[namsag]

What i would suggest with the fashion for these big range style cookers i would run 22mm to cooker while the floor is up

 

[doitall]

I was looking through fred flinstones quarry for my 2005 copy of 6891.
and found this

Pipe buried in concrete screed shall be installed in accordance with Figure 5.
Where a pipe is buried in a concrete screed there shall be a minimum of 25 mm of cover above the pipe.
8.8.3 Pipes buried in concrete ground floors shall be protected against failure caused by movement. Joints
shall be kept to a minimum. Compression fittings shall not be buried in concrete screeds or concrete slab.