Gas Pipe Sleeve Under Concrete Floor

If it is feasible to keep the pipe inside the sleeve dry by means of suitable end seals.

Gas pipe sleeve under concrete floor. 1 where the service pipe to any building having two or more floors to which gas is supplied or whether or not it has more than one floor a floor having areas with a separate supply of gas has an internal diameter of 50 mm or more no person shall install any incoming installation pipework supplying gas to any of those floors or areas as. Where piping in floor channels is exposed to excessive moisture or corrosive substances the piping shall be protected in an approved manner. The sleeve shall be two pipe sizes greater than the pipe passing through the wall. Build the sleeve into the wall or floor and seal the gap between the gas pipe and sleeve with flexible fire resistant compound at at least one end as in figure 4.

This will ensure freedom from corrosion. Borrowed from jerry s post on another thread. In industrial occupancies gas piping in solid floors such as concrete shall be laid in channels in the floor and covered to permit access to the piping with minimum damage to the building. Any section of the pipe installed inside concrete or steel pipe sleeves should be coated to at least the same standard as the remainder of the pipeline.

A pipe that passes through a foundation wall shall be provided with a relieving arch or a pipe sleeve shall be built into the foundation wall. This byot diy project details how to get a sprinkler pipe under an existing concrete slab side walk. Always sleeve the pipe where it passes through solid walls or floors.