METHOD FOR FIRE-RESISTANT SEALING OF LINE FEEDTHROUGHS OF THIN PIPES, A SEAL ASSEMBLY PREFABRICATED FOR THIS PURPOSE AND METHOD FOR THE PRODUCTION THEREOF

Abstract

A method can be used for fire-resistant sealing of an opening in a wall or ceiling, through which a line is passed. The method involves cutting a strip-shaped fire protection bandage to a length corresponding to a circumference of the line, with or without an overlap. The fire protection bandage contains fire-retardant and/or intumescent material. The method then involves placing the cut-to-length fire protection bandage around the line, to form a layer which only partially protrudes outward from the opening. The method further involves annularly applying a putty to part of the fire protection bandage protruding from the opening, to form a putty ring of a slightly larger outer diameter than the opening diameter, such that the putty ring closes the opening and extends slightly beyond the edge. The method finally involves pressing the putty ring against the fire protection bandage and the opening edge, to seal the line feedthrough.

Claims

1: A method for fire-resistant sealing of an opening in a wall or a ceiling, through which a line is passed, the method comprising: cutting a strip-shaped fire protection bandage to a length which corresponds to a simple circumference of the line, with or without an overlap, the fire protection bandage comprising fire-retardant and/or intumescent material; placing the cut-to-length fire protection bandage around the line, such that a layer of fire protection bandage is formed, optionally with an overlap, which layer only partially protrudes outward from the opening; annularly applying a putty to a part of the fire protection bandage protruding from the opening, a putty ring of a slightly larger outer diameter than the opening diameter being formed, such that the putty ring closes the opening and extends slightly beyond an edge thereof, and pressing the putty ring against the fire protection bandage and against the opening edge to seal the line feedthrough.

2: A method for producing a seal assembly for fire-resistant sealing of an opening in a wall or ceiling, through which a line is passed, the method comprising: cutting a strip-shaped fire protection bandage to a length which corresponds to a simple circumference of the line, with or without an overlap, the fire protection bandage comprising fire-retardant and/or intumescent material; applying a putty strip along one of two edges of the cut-to-length fire protection bandage, which are intended to extend in the circumferential direction of the line, the strip of putty being pressed against or otherwise attached to the one of two edges on an outer surface of the fire protection bandage that is not placed on the line; and optionally, applying a removable transport protection film to at least one surface of the putty strip and/or optionally, rolling up the fire protection bandage provided with the putty strip to form a simple layer having an overlap.

3: A method for fire-resistant sealing of a line feedthrough using a seal assembly produced from the method according to claim 2, the method for fire-resistant sealing comprising: placing the seal assembly around the line, such that a layer of the fire protection bandage is formed on the line, optionally with an overlap, wherein a peripheral edge of the fire protection bandage that is provided with the putty strip protrudes outward from the opening; removing the transport protection film, if necessary; and shaping the putty strip to form a putty ring of a slightly larger outer diameter than the opening diameter, such that the putty ring closes the opening and extends slightly beyond an edge thereof, and pressing the putty ring formed in this way against the fire protection bandage and against the edge in order to seal the line feedthrough.

4: The method according to claim 1, wherein the line has a diameter in a range of between approximately 16 mm and approximately 32 mm.

5: The method according to claim 1, wherein the putty is elastically and/or plastically deformable; and/or dense; and/or adhesive; and/or formed as a crosslinked rubber-based rubber product; and/or formed having fire protection additives.

6: The method according to claim 1, wherein the fire protection bandage has a flexible carrier layer, to which a fire protection wrap made of an intumescent material is attached.

7: The method according to claim 6, wherein the fire protection bandage, with the fire protection wrap thereof, is placed on the line, and the putty is placed on the carrier layer and pressed on.

8: The method according to claim 1, wherein the fire protection bandage is cut to a reduced width of approximately 30 mm before or after being cut to length.

9: The method according to claim 1, wherein the fire protection bandage protrudes approximately 5 mm outward from the opening after being placed around the line.

10: A seal assembly for fire-resistant sealing of an opening in a wall or ceiling, through which a line is passed, the seal assembly comprising: a strip-shaped fire protection bandage having a length which corresponds to a simple circumference of the line, with or without an overlap, the fire protection bandage comprising fire-retardant and/or intumescent material; a putty strip which extends along one of two peripheral edges of the fire protection bandage and is applied to an outer surface of the fire protection bandage that is not placed on the line; and optionally, a removable transport protection film on at least one surface of the putty strip; wherein the fire protection bandage provided with the putty strip is optionally rolled up to form a simple layer having an overlap.

11: The seal assembly according to claim 10, wherein the seal assembly is designed as a roll product.

12: The method according to claim 2, wherein the fire protection bandage provided with the putty strip is rolled up to form the simple layer having the overlap, and wherein overlapping ends of the fire protection bandage are temporarily attached to one another by some of the putty strip or by additional putty.

13: The method according to claim 6, wherein the flexible carrier layer is a woven fabric layer.

14: The method according to claim 6, wherein fire protection wrap is a continuous fire protection wrap.

15: The seal assembly according to claim 10, wherein the fire protection bandage provided with the putty strip is rolled up to form the simple layer having the overlap, and wherein overlapping ends of the fire protection bandage are attachable to one another by some of the putty strip or by additional putty.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0037] The above aspects of the invention and the embodiments and specific configurations thereof are explained in more detail below with reference to the examples shown in the accompanying drawings. The drawings are kept schematic. Said drawings may, but do not have to, be understood to be true to scale. Identical reference symbols are used therein to denote identical elements or elements which correspond to one another in terms of the function thereof. In the drawings:

[0038] FIG. 1a-c show individual steps of a method according to the first aspect of the invention for sealing an opening in a wall through which a thin pipe is passed;

[0039] FIG. 2 shows an example of a seal assembly of the type described herein for use in a method according to another aspect of the invention; and

[0040] FIG. 3 shows another example of a seal assembly of the type described herein.

DESCRIPTION OF EMBODIMENTS

[0041] All of the various embodiments, variants and specific design features of the method according to the first and further aspects of the invention and the corresponding seal assembly mentioned above in the description and in the subsequent claims can be implemented in the examples shown in FIG. 1a to 3. They are therefore not all repeated again below. The same applies mutatis mutandis to the definitions of terms and effects already specified above in relation to individual features which are shown in FIG. 1a-3.

[0042] FIG. 1a to 1c show, in a perspective view, individual steps of a method according to the first aspect of the invention for sealing an opening 1 in a drywall 2 through which a thin pipe 3 (line) is passed.

[0043] First (not shown), a strip-shaped fire protection bandage 4, which in this example is a conventional fire protection bandage CFS-B, is reduced (cut) from approximately 125 mm to approximately 30 mm in width and cut to a length which corresponds to the circumference of the pipe 3.

[0044] As FIG. 1a shows, the cut-to-length fire protection bandage 4 is then placed around the pipe 3, such that a simple layer of the fire protection bandage 4 is formed on the pipe 3. The fire protection bandage 4 is applied to the pipe 3 such that a large part of the fire protection bandage 4, in particular at least half of the width thereof, is hidden within the opening 1 in the wall 2, and only the remaining width, in this example approximately 5 mm, protrudes from the opening 1.

[0045] As FIG. 1b and FIG. 1c show, a putty 5 is then annularly applied by hand to the part of the fire protection bandage 4 protruding from the opening 1 such that a putty ring 6 (in this example approximately in the shape of a disc or a circular ring, a regular shape not being important) having a slightly larger outer diameter than the opening diameter is formed or shaped by kneading. The putty ring 6 is shaped such that it closes the opening 1, i.e. the annular gap 7 between the pipe 3 and the opening edge 8, on the outside and extends slightly beyond the opening edge 8 in the wall 2. In other words, the putty ring 6 formed in this way covers the annular gap 7 and is pressed firmly against both the fire protection bandage 4 and the opening edge 8. The fire protection bandage 4 is thus fixed and the annular gap 7 is closed, i.e. sealed.

[0046] A putty 5 which is suitable for this purpose is ideally plastically deformable in order to be adaptable to the relevant individual shape of the annular gap 7 by kneading. The putty can also be dense and/or optionally can also be adhesive. In particular, said putty can be a permanently plastic butyl rubber mixture.

[0047] In order to improve the fire protection properties, the putty 5 can in particular also contain fire protection additives. The putty can, for example, be flame-retardant or intumescent, such that it foams up when exposed to heat and thus can close any defects in the opening 1 that arise in the event of a fire, for example as a result of a melting line.

[0048] FIG. 2 shows an example of a prefabricated seal assembly 9 of the type described herein for use in a method according to a further aspect of the invention. In order to produce the seal assembly 9, a conventional fire protection bandage 4 (type CFS-B) was reduced (cut) from approximately 125 mm to approximately 30 mm in width and cut to a length corresponding to the circumference of the line to be sealed (not shown) plus a slight overlap 10. The seal assembly 9 further comprises a putty strip 11 which extends along one of the two peripheral edges 12 of the fire protection bandage 4 and is applied to an outer surface 13 of the fire protection bandage 4 that is not intended to be placed on the line. In this example, this outer surface 13 is a woven fabric layer 13, to which a continuous fire protection wrap 14 made of an intumescent material is attached on the inside, which fire protection wrap is intended to abut the line. The putty strip 11 is formed from the same putty 5 as in FIG. 1a-1c.

[0049] In the prefabricated seal assembly 9 shown in FIG. 2, the cut-to-length fire protection bandage 4 provided with the putty strip 11 is rolled up to form a simple layer having an overlap 10, overlapping ends of the fire protection bandage 4 being attached to one another by additional putty 15.

[0050] FIG. 3 shows a further example of a prefabricated seal assembly 9a which additionally has a removable transport protection film 16 on the outside of the putty strip 11. In addition, the explanation with regard to FIG. 2 can also apply correspondingly with regard to FIG. 3. In the variant shown in FIG. 3, the prefabricated seal assembly 9a is not rolled up; however, this can optionally also take place here in a further production step.

[0051] By means of a prefabricated seal assembly 9 or 9a of FIG. 2 or 3, the sealing of a line feedthrough, for example on the pipe 3 of FIG. 1a, can be carried out in a single mounting step (OneStep) with a result as in FIG. 1c.

[0052] As proven by representative fire tests using a 100 mm thick drywall and hand-made prototypes, as shown in FIG. 1a to 3, the test target of up to EI 120 (according to EN fire resistance classes for integrity, heat barrier or thermal insulation under the influence of fire) is achieved for various pipe types having different diameters of between 16 mm and 32 mm, such as for [0053] a PP-R Aquatherm pipe having a diameter of 20 mm and a wall thickness of 3.5 mm; [0054] a PVC pipe having a diameter of 32 mm and a wall thickness of 3.6 mm; [0055] a PVC pipe having a diameter of 25 mm and a wall thickness of 1.9 mm; [0056] empty electrical conduits, flex, FFKu-EL-F having an unoccupied diameter of 25 mm; [0057] a PE pipe having a diameter of 25 mm and a wall thickness of 1.8 mm.

[0058] The amount of intumescent material reduced according to the invention is therefore sufficient for these types of pipe. The function of the bandage in solid walls and ceilings should therefore be at least comparable. As the following calculation shows, a material saving of approx. 88% can be achieved in comparison with the analogous conventional installation solution using CFS-B, which is particularly resource-efficient (V.sub.CFS Calla in this case denotes the volume of the fire protection bandage 4 cut to size according to the invention):

[0059] Exemplary calculation for the material consumption of the fire protection bandage 4 according to the present invention:

D=U,U=78.5 mm for D=25 mm with 1 winding

[0060] Fire protection material: bandage 2 mm thick and 30 mm wide (measured in the longitudinal direction of the pipe)

.fwdarw.VCFS-Calla=U.Math.2 mm.Math.30 mm=4710 mm3

[0061] By contrast, in the case of a conventional fire protection bandage CFS-B, the following material consumption is obtained:

[0062] 2 windings required, thickness 2 mm and width 125 mm (measured in the longitudinal direction of the pipe)

.fwdarw.VCFS-B=U.Math.2(windings).Math.2 mm.Math.125 mm=39250 mm3

.fwdarw.Saving 1VCFS-CallaNCFS-B=10.12=0.88

[0063] In addition to the uses of the method according to the invention and the seal assembly according to the invention described herein by way of example, further uses for other installations such as aluminum composite pipes, insulated solar lines and climate splitting applications are also to be mentioned as possible examples. Furthermore, use in existing combination fire stop systems is also possible. Instead of the putty described, alternative building materials can also be used for sealing, provided that they can guarantee the required fire-resistant sealing.