System and method for sealing in a conduit a space between an inner wall of the conduit and at least one pipe or cable extending through the conduit

1. A system for sealing in a conduit a space between an inner wall of the conduit and at least one pipe or cable extending through the conduit, wherein the system comprises:

a plurality of rubber elements for surrounding the at least one pipe or cable such that each is placeable about the at least one pipe or cable in a non-coaxial fashion, the plurality of rubber elements for providing in the conduit a support-structure which is clampable between the inner wall and the at least one pipe or cable; and a sealant for application against the support-structure and for sealing off at least one end of the conduit between the inner wall and the at least one pipe or cable, the support-structure being capable of supporting at least the sealant, wherein each rubber element is made of a fire-resistant vulcanized rubber of a thermally substantially non-expandable type, and wherein the sealant is made of a fire-resistant polymer which is vulcanizable at room temperature under exposure to humidity and which is also of the thermally substantially non-expandable type, wherein the rubber or the polymer of the thermally substantially non-expandable type comprises rubber or polymer, respectively, which is free from components which would on heating cause the rubber or the polymer to expand to an extent larger than the extent to which the rubber or the polymer itself expands on such heating, wherein each rubber element is a longitudinal tubular element having a mantle wall, and with at least some of the rubber elements having a non-split mantle wall.

2. The system according to claim 1 , wherein the rubber comprises a silicon based rubber.

3. The system according to claim 1 , wherein the polymer comprises a silicon based polymer.

4. The system according to claim 1 , wherein the rubber has a hardness in a range of 70 to 78 Shore A.

5. The system according to claim 1 , wherein the mantle wall has a thickness in a range of about 2 to 5 mm.

6. The system according to claim 1 , wherein the plurality of rubber elements comprises rubber elements which all have the same shape.

7. The system according to claim 1 , wherein the plurality of rubber elements comprises two types of rubber elements.

8. The system according to claim 7 , wherein a member of one of the two types and a member of the other one of the two types differ in transverse dimensions.

9. The system according to claim 1 , wherein all of the plurality of rubber elements have similar dimensions in longitudinal direction.

10. The system according to claim 1 , wherein at least one of the plurality of rubber elements is cylindrical in shape.

11. The system according to claim 10 , wherein the cylindrically shaped rubber element has an outer diameter in a range of 16 mm to 30 mm.

12. The system according to claim 10 , wherein the cylindrically shaped rubber element has an inner diameter in a range of 10 mm to 22 mm.

13. The system according to claim 1 , wherein the sealant has a hardness in a range of 35-50 Shore A.

14. The system according to claim 1 , wherein at least one of:

1) each of the plurality of rubber elements

and

2) the sealant is non-ignitable at a temperature of 400° C.

15. The system according to claim 1 , wherein at least one of:

1) each of the plurality of rubber elements

and

2) the sealant has an oxygen index of at least 45%.

16. The system according to claim 1 , wherein at least one of:

1) each of the plurality of rubber elements

and

2) the sealant has a color which contrasts with black.

17. The system according to claim 16 , wherein the color is red-brown.

18. The system according to claim 1 , further comprising for at least one of the at least one pipe or cable, an element of a thermally substantially expandable type being placeable coaxially around one of the at least one pipe or cable.

19. The system according to claim 18 , wherein the element of the thermally substantially expandable type comprises material having a component which would on heating cause the material to expand to an extent larger than the extent to which the material itself expands on such heating.

20. The system according to claim 19 , wherein the material is EVA or EPDM rubber.

21. The system according to claim 19 , wherein the component is heat expandable graphite.

22. The system according to claim 1 , in combination with the conduit.

23. A method for sealing in a conduit a space between an inner wall of the conduit and at least one pipe or cable extending through the conduit, wherein the method comprises:

providing a plurality of rubber elements for surrounding the at least one pipe or cable such that each is placeable about the at least one pipe or cable in a non-coaxial fashion, the plurality of rubber elements for providing in the conduit a support-structure which is clampable between the inner wall and the at least one pipe or cable; and a sealant for application against the support-structure and for sealing off at least one end of the conduit between the inner wall and the at least one pipe or cable, the support-structure being capable of supporting at least the sealant, wherein each rubber element is made of a fire-resistant vulcanized rubber of a thermally substantially non-expandable type, and wherein the sealant is made of a fire-resistant polymer which is vulcanizable at room temperature under exposure to humidity and which is also of the thermally substantially non-expandable type, wherein the rubber or the polymer of the thermally substantially non-expandable type comprises rubber or polymer, respectively, which is free from components which would on heating cause the rubber or the polymer to expand to an extent larger than the extent to which the rubber or the polymer itself expands on such heating, wherein each rubber element is a longitudinal tubular element having a mantle wall, and with at least some of the rubber elements having a non-split mantle wall;

placing in the conduit the plurality of rubber elements; and

sealing at least one end of the conduit with the sealant.

24. The method for sealing according to claim 23 , further comprising placing coaxially around at least one of the at least one pipe or cable an element of a thermally substantially expandable type.

25. A system for sealing in a conduit a space between an inner wall of the conduit and at least one pipe or cable extending through the conduit, wherein the system comprises:

a plurality of rubber elements for surrounding the at least one pipe or cable such that each is placeable about the at least one pipe or cable in a non-coaxial fashion, the plurality of rubber elements for providing in the conduit a support-structure which is clampable between the inner wall and the at least one pipe or cable; and a sealant for application against the support-structure and for sealing off at least one end of the conduit between the inner wall and the at least one pipe or cable, the support-structure capable of supporting at least the sealant, wherein each rubber element is made of a rubber of a thermally substantially non-expandable type and wherein each rubber element is a longitudinal tubular element having a mantle wall, and with at least some of the rubber elements having a non-split mantle wall, and wherein the sealant is made of a polymer which is also of the thermally substantially non-expandable type, wherein the rubber or the polymer of the thermally substantially non-expandable type comprises rubber or polymer, respectively, which is free from components which would on heating cause the rubber or the polymer to expand to an extent larger than the extent to which the rubber or the polymer itself expands on such heating.

26. The system according to claim 25 , wherein the rubber has a hardness in a range of 70 to 78 Shore A.

27. The system according to claim 25 , wherein the plurality of rubber elements is cylindrical in shape having an outer diameter in a range of 16 mm to 30 mm.

28. The system according to claim 27 , wherein the cylindrically shaped rubber element has an inner diameter in a range of 10 mm to 22 mm.

29. The system according to claim 25 , wherein the sealant has a hardness in a range of 35-50 Shore A.

30. The system according to claim 25 , wherein at least one of:

1) each of the plurality of rubber elements

and

2) the sealant is non-ignitable at a temperature of 400° C.

31. The system according to claim 25 , wherein at least one of:

1) each of the plurality of rubber elements

and

2) the sealant has an oxygen index of at least 45%.

32. The system according to claim 25 , further comprising for at least one of the at least one pipe or cable, an element of a thermally substantially expandable type being placeable coaxially around one of the at least one pipe or cable.

33. The system according to claim 32 , wherein the element of the thermally substantially expandable type comprises material having a component which would on heating cause the material to expand to an extent larger than the extent to which the material itself expands on such heating.

34. The system according to claim 33 , wherein the material is EVA or EPDM rubber.

35. The system according to claim 33 , wherein the component is heat expandable graphite.