Gas Pipe buried in floor kitchen. Best practice?

[Ad_stoke]

Ok I've decided to use pvc coated copper pipe but do I need sleeve it aswell for movement etc when it is layed... Will there be any movement in ground once the screed is layed and dried

 

[jtsplumbing]

Ok I've decided to use pvc coated copper pipe but do I need sleeve it aswell for movement etc when it is layed... Will there be any movement in ground once the screed is layed and dried

No, sleeveing only required if in concrete, have you not got this information in your reference books ? [installation of pipework]

 

[AlexGas]

8.8 Pipes buried in concrete ground floors
8.8.1 Installation pipework shall not be buried in concrete slabs.
8.8.2 Rigid stainless steel pipework shall not be buried in concrete screeds.
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.

COMMENTARY AND RECOMMENDATIONS ON 8.8.3
Suitable methods of protection are as follows.
a) Pipe laid on top of base concrete and subsequently covered by a screed (see also 9.2.1).
b) Steel or copper pipe installed into preformed ducts with protective covers.
c) Steel or copper pipe fitted with additional soft, non-permeable covering material. The coverings should be soft and thick enough to provide movement yet resilient enough to support the concrete cover while it is setting.
The covering should be at least 5 mm thick and resistant to concrete ingress which would negate its ability to allow movement.
Reference should also be made to 9.2.1 for the application of adequate corrosion protection.

8.8.4 Pipes passing vertically through solid floors shall take the shortest practicable route and shall be sleeved (see 8.10).
8.8.5 Compression fittings shall not be buried in the structure or below ground.

 

[AlexGas]

9.2 Buried pipework
9.2.1 Internal environment
9.2.1.1 Pipework that is buried in a solid floor or wall shall be factory sheathed, or protected on site by wrapping or with suitable bituminous paint protection.
The entire section of pipe and fittings to be buried shall be protected. Any sheathing or wrapping shall be examined for cuts or other defects and made good prior to use. Joints and fittings shall be cleaned, and wrapped or painted with bituminous paint after the satisfactory completion of a gas tightness test.
Galvanized or painted pipes shall not be buried without additional protection as specified in the previous paragraph.

COMMENTARY AND RECOMMENDATIONS ON 9.2.1.1
Protective measures are applied as a precaution against electrolytic and/or chemical corrosion. The use of factory bonded wrapping or sheathing is recommended.

9.2.1.2 Where installation pipes are to be buried in magnesium-oxy-chloride cement or magnesite flooring, they shall be of copper with a factory bonded sheath and jointed with copper capillary fittings.
Bends and joints shall be further protected by wrapping with a suitable plastic tape. All surfaces shall be clean and dry before the additional protection is applied with a minimum 50 % overlap to provide at least a layer of double thickness.

 

[Ad_stoke]

Thanks alexgas. Thats fantastic. Saves me looking for the G1 pack which is somewhere. In the house. Thanks

 

[Hobo128]

The one time I had to lay gas pipe under floor I wrapped it (after tightness test ofcourse) then used pipe lagging for any movement, worked a treat I think. Would definitely use this method again.

 

[Ad_stoke]

Thanks guys. U are really helpful.