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1. WO1996020886 - SYSTEME DE MONTAGE DE GARNITURES D'ETANCHEITE DE TOITS FLOTTANTS

Note: Texte fondé sur des processus automatiques de reconnaissance optique de caractères. Seule la version PDF a une valeur juridique

[ EN ]

IT IS CLAIMED:
1. An apparatus for sealing the space between a floating roof and a tank wall in a liquid storage tank, in which the floating roof includes a rim extending upwardly from the floating roof and the rim defines an aperture therethrough; the apparatus comprising:
a primary seal having a first end in sealing arrangement with the tank wall, a second end connectable to the rim, and an aperture defined by the second end and alignable with the rim aperture; a secondary seal having a first end in sealing contact with the tank wall, a second end connectable to the rim, and an aperture defined by the second end and alignable with the rim and primary seal apertures;
a bolt insertable through the apertures in the rim, the primary seal and the secondary seal; and means for releasing the secondary seal from the rim while maintaining the primary seal connection to the rim, including
a retainer connectable to the bolt for joining the primary seal to the rim, and
a nut connectable to the bolt for joining the secondary seal to the rim.

2. The apparatus of claim 1, wherein the second end of the secondary seal is interposed between the retainer and the nut.

3. The apparatus of claim 1, wherein the retainer, the nut and the secondary seal are connected to the bolt on a first side of the rim and the primary seal is connected to the bolt on a second side of the rim.

4. The apparatus of claim 1, wherein the rim extends vertically from the top deck of the floating roof.

5. The apparatus of claim 1, wherein the rim comprises an angle having a vertical portion and a horizontal portion defining the aperture.

6. The apparatus of claim l, and further comprising a washer bar having an aperture for receiving the bolt and means for maintaining sealing contact between the primary seal and the rim.

7. The apparatus of claim 1, and further comprising a washer bar having an aperture for receiving the bolt and means for maintaining sealing contact between the primary seal and the rim, wherein the washer bar is interposed between a head of the bolt and the primary seal.

- 12 - 8.. The apparatus of claim 1, and further comprising:
a first washer bar having an aperture for receiving the bolt and having means for maintaining sealing contact between the primary seal and the rim; and
a second washer bar having an aperture for receiving the bolt and having means for maintaining sealing contact between the secondary seal and the rim.

9. The apparatus of claim 1, and further comprising: a first washer bar having an aperture for receiving the bolt and having means for maintaining sealing contact between the primary seal and the rim; and
a second washer bar having an aperture for receiving the bolt and having means for maintaining sealing contact between the secondary seal and the rim,
wherein the first washer bar is interposed between a head of the bolt and the primary seal and the second washer bar is interposed between the nut and the secondary seal.

10. The apparatus of claim 1, and further comprising a first gasket interposed between the rim and the primary seal.

11. The apparatus of claim 1, and further comprising a first gasket interposed between the rim and the primary seal, wherein the gasket comprises compressible foam tape.

12. The apparatus of claim 1, and further comprising a first gasket interposed between the rim and the primary seal and a second gasket interposed between the rim and the retainer.

13. The apparatus of claim 1 , and further comprising a first gasket interposed between the rim and the primary seal and a second gasket interposed between the rim and the retainer, wherein the first and second gaskets comprise compressible foam tape.

14. The apparatus of claim 1, and further comprising a gasket wrapped around the rim and interposed between the rim and the primary seal and between the rim and the retainer.

15. The apparatus of claim 1, and further comprising a gasket wrapped around the rim and interposed between the rim and the primary seal and between the rim and the retainer, wherein the gasket comprises compressible foam tape.

16. The apparatus of claim 1, wherein the retainer comprises a push nut.

17. The apparatus of claim l, wherein the rim comprises a rim angle having a horizontal flange.

18. A method for mounting a primary seal and a secondary seal on a floating roof for sealing the space between the floating roof and a tank wall in a liquid storage tank, wherein the floating roof includes a rim extending upwardly therefrom and an aperture therethrough the method comprising the steps of:
a) aligning an aperture in the primary seal with the rim aperture;
b) inserting a bolt through the apertures in the primary seal and the rim;
c) connecting a retainer to the bolt to join the primary seal to the rim;
d) aligning an aperture in the secondary seal with the bolt;
e) inserting the bolt through the secondary seal aperture; and
f) connecting a nut to the bolt to join the secondary seal to the rim.

19. The method of claim 18, and further comprising the step of releasing the secondary seal from the rim by loosening the nut from the bolt.

20. The method of claim 18, and further comprising the step of sealing the interface between the primary seal and the rim with a compressible gasket material.

21. The method of claim 18, and further comprising the step of sealing the interface between the retainer and the rim with a compressible gasket material.

22. The method of claim 18, and further comprising the step of inserting the bolt through an aperture in a washer bar before inserting the bolt through the apertures in the primary seal and the rim.

23. The method of claim 18, and further comprising the step of inserting the bolt through an aperture in a washer bar before connecting the nut to the bolt.