Description:
1. the dimension of the diagram is calculated by millimeter.
2. flexible embedded waterproofing casing applies to the building
which requires decreasing vibration and totally waterproofing
at the pipe passing regions.
3. brushing primer over the theca evenly after the sleeve finished
(the primer could be minium or adhesive bitumen primer)
and covering antisepticise on request.
4. it must be concrete-wall where the sleeve passing through.
The range of the fluid concrete ought to be 200mm wider
than the fins’ diameter and the sleeve should be concreted tightly
inside the wall.
5. the thickness of the wall should be no less than 300mm in the sleeve passing range.
And the minimum diameter of this range should be 200mm large than the fins.
6. the weight of the casing material counted by L, the thickness of the wall.
7. the casing mainly made from plain steel, and welding by T42.
