FIRE PROTECTION SLEEVE

Description

[0001] The invention relates to a fire protection sleeve that can be mounted on a wall or ceiling for sealing off cables leading through walls or ceilings, comprising an intumescent fire protection insert, a wall part surrounding the fire protection insert, on the inside of which the fire protection insert is arranged, and at least one fastening part that projects radially outwards in the region of at least one end face of the wall part.

[0002] Such fire protection collars are known in a wide variety of designs. They are used to seal openings through walls, ceilings, or floors of buildings in the event of a fire, through which flammable or melting pipes are routed. For this purpose, the fire protection collar is placed around the pipes so that in the event of a fire, the expanding fire protection insert closes the opening as tightly as possible. The fire protection collar is usually placed on the outside of the opening, for example, on the wall through which the opening extends. Sheet metal is usually used as a casing for the strip of intumescent material. With such a casing, the expansion pressure of the fire protection insert generated in the event of a fire can be well supported, ensuring that the fire protection insert expands in a directed manner to where the

[0003] Opening is to be closed. Known fire protection insert designs are disclosed, for example, in JP 2008 095735 A and EP 1 635 100 A1. A disadvantage of the known designs is that the fire protection insert is designed as a strip a few millimeters thin, which does not completely fill the space spanned by the jacket, so that for a given sleeve circumference there is no flexibility with regard to the circumference of the pipes to be enclosed. For example, a certain sleeve type is only suitable for a certain pipe diameter and, if the diameter of the pipe to be enclosed is smaller than that specified by the sleeve, the annular gap between the pipe and the opening cannot be sealed smoke gas-tight.

[0004] In particular, when using the known fire protection collars for lines, cables, and the like, retrofitting with additional lines or cables would only be possible by replacing the already installed collar with one with a larger circumference. Furthermore, the collar itself, which usually consists of a sheet metal casing, would place a lower limit on the circumference of the line(s) and cable to be sealed, meaning that the collar cannot enclose arbitrarily small circumferences. Therefore, these fire protection collars are not used to seal individual lines or cables with relatively small diameters. Since the fire protection insert in the known fire protection collars is usually not very compressible, line bundles consisting of multiple cables, for example, cannot be sealed off smoke-tight, as the gaps between the individual lines are not sealed by the fire protection insert.For this purpose, a further measure is required, such as additional sealing of the component penetration, for example with a fire protection foam, a fire protection compound or the like.

[0005] Furthermore, the known fire protection sleeves do not provide smoke gas tightness in the case of very unstructured cable laying, as they are not very flexible and are designed for the sealing of pipes and cable runs of certain diameters that are as round as possible.

[0006] In practice, cable harnesses are usually sealed with intumescent sealants, such as fire-protection foams, fire-protection mortars, or other sealants, whereby the gap between the cable harness and the component is filled with the intumescent sealants. This does not reliably ensure that the installation specifications according to the approvals of the fire protection products, such as maximum cable layout, installation depth, maximum opening cross-section, and wall clearances, are met. Furthermore, the subsequent sealing of cable penetrations is time-consuming. The object of the invention is to create a fire protection sleeve that can be used more flexibly and adapted on-site with little effort to the required wire or cable diameter.

[0007] To achieve this object, the invention provides that the intumescent fire protection insert is designed as a resiliently deformable molded body that completely fills the space encompassed by the housing. The molded body is two-part and is formed from two elements that together form the molded body, with the surfaces of the abutting surfaces being structured. The molded body can be designed as a cube, cuboid, prism, or cylinder. Preferably, the molded body is designed as a cylinder formed by two semi-cylindrical elements. The base and cover surfaces can take on any shape that can be encased by a sleeve, in particular they are circular, elliptical, polygonal, or approximately hexagonal.

[0008] "flexibly deformable"In the context of the invention, this means that the material from which the fire protection insert is made is so elastic that it can be easily compressed, i.e., without great force, for example, with one hand, allowing the fire protection insert to return to its original shape. This ensures that the wires or cables are enclosed flush and thus sealed against smoke. This is particularly advantageous for cable bundles, as the material of the fire protection insert presses into the gaps between the adjacent outer cables and also seals them.

[0009] The two-part mold greatly simplifies the subsequent installation of the fire protection collar around cables or pipes already routed through component openings. If the molded body is selected slightly larger than the space encompassed by the wall section, the two halves are pressed together, ensuring satisfactory cold smoke gas tightness in the installed state.

[0010] However, it has been found that the flat butt surface, i.e. the surface with which the two half-bodies, in particular half-cylinders, lie against one another in the assembled state, does not ensure sufficient tightness against hot air and hot gases in the event of a fire, since despite the pressing of the two half-bodies, in particular half-cylinders, heat can penetrate into the gap between the half-bodies and lead to early heating of the cold side, i.e. the side of the sleeve facing away from the fire.

[0011] Particularly with larger diameters of the fire protection collar, the gap is also a weak point in the water jet test prescribed in the USA. In this test, a high-pressure water jet is directed at a firewall after the fire test, but no water is allowed to penetrate the firewall. If the ash block formed by the fire side after the fire test cannot withstand the high pressure of the water jet or has completely burned away, the gap on the cold side—that is, the side of the firewall facing away from the fire, where the collar is generally still intact and the intumescent material has not yet been activated—can open, allowing water to penetrate to the cold side.

[0012] In order to increase the tightness of the gap, according to the invention the surfaces of the abutting surface of the two-part, in particular semi-cylindrical elements are structured, ie the surface is provided with elevations and depressions.

[0013] Furthermore, thanks to the structured surfaces of the half-cylinders, the fire protection insert adequately seals the pipe or tube passing through it when pressed into place, without the need to first cut the pipe's contour out of the fire protection element. The elastic and deformable properties of the material allow the raised portions adjacent to the pipe to either be compressed, causing them to widen, or pushed sideways. Furthermore, the surfaces of the half-cylinders interlock, creating an interlocking effect. This ensures that the molded body can withstand the high pressure of the water jet in the water jet test.

[0014] A further advantage of the structured surfaces is that cables can be inserted easily and without too much resistance if they are subsequently installed. The flexibility and elasticity of the material allow the raised portions of the cable or pipe to give way when they are subsequently inserted, allowing the insertion to take place without great resistance and without causing significant damage to the fire protection element. In the event that a few raised portions are torn off during the insertion of the cable, this does not impair the sealing properties of the fire protection element, as the remaining intact raised portions ensure sufficient smoke gas and fire tightness. In addition, the remaining raised portions allow the torn-off raised portions to hang on, which in turn creates a seal. The places where the raised portions were torn off generally result in flat areas.The elasticity of the material now means that the flat areas can adapt their shape to the pipe or pipe bundle, so that smoke gas tightness is still guaranteed.

[0015] The structured surfaces of the abutting surfaces of the half-bodies, in particular the half-cylinders, are expediently formed by regularly or irregularly arranged protruding elements, with a regular arrangement being preferred. Particularly preferably, the protruding elements are arranged periodically along imaginary lines on the base surface. It has proven advantageous if the protruding elements run along imaginary lines parallel to the outward-facing surface of the shaped body, with it being particularly advantageous if three to four rows of protruding elements are provided, based on the thickness or height of the shaped body.

[0016] According to a preferred embodiment of the invention, the protruding elements themselves have different or identical geometries and / or dimensions. This ensures that several cables of different sizes can be laid next to each other without additional effort, for example, by cutting out the fire protection insert, without compromising the fire protection function of the fire protection barrier.

[0017] For ease of manufacture, the formed elevations and depressions are complementary to each other. In a fire protection element consisting of two molded bodies with textured surfaces facing each other, the textured surfaces are preferably complementary to each other, i.e., the elevations and depressions interlock, although small gaps may remain. This achieves particularly good sealing against the passage of smoke gases, even if the textured surfaces are not 100% complementary.

[0018] The shape of the elevations and depressions on the structured surface of the molded body is not limited. The protruding elements are preferably pyramid-, conical-, hemispherical-, or knob-shaped.

[0019] For manufacturing reasons, the raised portions can be connected to each other by webs. This can contribute to stability, depending on the intended use of the fire protection elements according to the invention, such as when used as fire protection bricks or as a mat. In particular, the height of the webs corresponds to a maximum of half the height of the raised portions, thus facilitating the interlocking of two fire protection elements arranged so that their textured surfaces face each other.

[0020] However, a preferred fire protection element, particularly for use as a wrap, is one whose elevations are not connected by webs. This has a direct impact on the flexibility of the fire protection element, with fire protection elements without the webs being significantly more flexible.

[0021] Alternatively, the structured surface can be formed by elevations and depressions in the form of grooves. In a direction perpendicular to the corresponding plane of the fire protection element, the structured surface is, in particular, wave-shaped, trapezoidal, or wedge-shaped. This means that the elevations and depressions together result in the respective shape. In the following, the term "shape of the grooves / elevations" is used for this. In a direction parallel to the corresponding plane of the fire protection element, the grooves can, in particular, be straight, wave-shaped, trapezoidal, or wedge-shaped. In the following, the term "course of the grooves / elevations" is used for this. It should be noted that the structured surface is not limited to the shapes and courses described here, but can take on any other shape and course. The course of the grooves orThere are also no restrictions on the number of elevations relative to a side edge of the fire protection element. They can run parallel to a side edge or at any angle to the side edge, i.e., diagonally, with the grooves or elevations arranged parallel to each other. The elevations can be alternating or irregular, and of the same or different heights.

[0022] The molded body preferably consists of a foamable binder containing at least one ash-forming and optionally intumescent substance mixture. The binder serves as a composite-forming carrier for the ash-forming and optionally intumescent substance mixture. The substance mixture is preferably homogeneously distributed in the binder. The composite-forming carrier is preferably selected from the group consisting of polyurethanes, phenolic resins, polystyrenes, polyolefins such as polyethylene and / or polybutylene, melamine resins, melamine resin foams, synthetic or natural rubber, cellulose, elastomers, and mixtures thereof, with polyurethanes being preferred.

[0023] The ash-forming and optionally intumescent mixture of substances comprises the usual fire protection additives known to the person skilled in the art, which foam up in the event of a fire, i.e. under the influence of heat, and thereby form a foam that prevents the spread of flames, such as an intumescent material based on an acid generator, a carbon-providing compound and a gas generator.The intumescent material preferably comprises, as acid generator, a salt or an ester of an inorganic, non-volatile acid selected from sulfuric acid, phosphoric acid, and boric acid; as carbon-providing compound, a polyhydroxy compound and / or a thermoplastic or thermosetting polymeric resin binder; and, as gas generator, a chloroparaffin, melamine, a melamine compound, in particular melamine cyanurate, melamine phosphate, melamine polyphosphate, tris(hydroxyethyl) cyanurate, cyanamide, dicyanamide, dicyandiamide, biguanidine, and / or a guanidine salt, in particular guanidine phosphate or guanidine sulfate. Additionally or alternatively, physically foaming compounds, such as expandable graphite, can be used instead of the intumescent material just described in the event of a fire.

[0024] The composite-forming carrier can further contain, as an ablative additive, an inorganic compound that has water embedded in it, e.g., as water of crystallization, and does not dry out at temperatures up to 100°C, but releases it in the event of a fire above 120°C and can thus cool temperature-carrying parts. This compound is preferably an inorganic hydroxide or hydrate that releases water at the fire temperature or upon exposure to flames, in particular aluminum hydroxide, aluminum oxide hydrates, or partially hydrated aluminum hydroxides. However, other inorganic hydroxides or hydrates that release water upon exposure to flames are also suitable, as described in EP 0 274 068 A2.

[0025] Such compounds, which can be used as a mixture of substances in the fire protection insert according to the invention, are known to the person skilled in the art and are disclosed, for example, in the following publications, to which reference is hereby expressly made: DE 30 25 309 A1, DE 30 41 731 A1, DE 33 02 416 A1, DE 34 11 327 A1, EP 0 043 952 B1, EP 0 051 106 B1, EP 0 061 024 B1, EP 0 116 846 B1, EP 0 158 165 B1, EP 0 274 068 A2, EP 1 347 549 A1, EP 1 641 895 B1 and DE 196 53 503 A1.

[0026] The molded body is produced by molded foaming, such as reaction foaming (RIM), according to DE 3917518, e.g., with Fomox® fire protection foam or the insulating layer-forming building material HILTI CP 65GN, or by cutting. Materials that can be used for the purposes of the invention are known from EP 0061024 A1, EP 0051106 A1, EP 0043952 A1, EP 0158165 A1, EP 0116846 A1, US Pat. No. 3,396,129 A, and EP 1347549 A1. The molded body preferably consists of an intumescent polyurethane foam, as known from EP 0061024 A1, DE 3025309 A1, DE 3041731 A1, DE 3302416 A and DE 3411 327 A1.

[0027] Due to the consistency of this foam, it is possible to seal wall penetrations immediately after the walls have been constructed, ensuring they are fire- and smoke-tight. Only during installation can one or more through-holes be cut into the preformed body of the fire protection insert, the diameter of which is precisely matched to the pipes and cables to be routed through them. The flexibility of the preformed body material also allows the preformed body to be positioned precisely flush with the pipes or cables and can seal the gaps between pipes or cable bundles. Furthermore, the preformed body can be easily cut into to seal off already installed pipes and cables without compromising its smoke-tightness.

[0028] The shape of the sleeve, in particular the shape of the wall section, is adapted to the shape of the molded body and is preferably cylindrical. The height of the molded body is in turn adapted to the width of the wall section of the fire protection sleeve and preferably corresponds to this width. The circumference of the sleeve approximately corresponds to the outer circumference of the body defined by the molded body, although it may be slightly smaller to ensure a firm hold of the fire protection insert in the fire protection sleeve.

[0029] In a preferred embodiment of the invention, the shaped body of the fire protection insert is dimensioned such that the height of the shaped body is greater than the width of the wall part of the fire protection sleeve, so that the shaped body projects beyond the wall part. The shaped body expediently projects beyond the wall part only on the side facing the wall or ceiling. Tabs are preferably provided on the wall part only on the circumferential line (outer edge) of the wall part, which is opposite the wall or ceiling. This secures the fire protection insert against being pulled out or slipping out. When installed, the tabs ensure that in the event of a fire the intumescence of the fire protection insert is directed towards the component opening and that the fire protection insert can be effectively pressed against the wall or ceiling.

[0030] In an alternative embodiment, the shaped body has a flange running at right angles to the shaped body on the base surface facing the wall or ceiling. Alternatively, the flange can be formed by a notch running in the circumferential direction of the shaped body, so that the circumference of the flange corresponds at least to the circumference of the shaped body. The flange is expediently arranged so that it forms the outermost part of the side of the fire protection sleeve facing the wall or ceiling. This allows a smoke-tight connection of the fire protection sleeve to the wall penetration by the flange acting as a seal. Therefore, additional sealing of the gap remaining between the wall or ceiling and the cable harness with sealant is no longer necessary.This has the advantage that the circumference of the sleeve only needs to be adjusted to the size of the wall or ceiling opening, allowing the user considerable flexibility in the configuration of the opening. Even if the opening is partially filled with pipes or cables, the remaining open gap does not need to be sealed with additional fire protection material, such as foam, because the flange and the molded body material provide sufficient smoke gas tightness.

[0031] In both designs, the circumference of the flange preferably corresponds at least to the outer circumference of the wall section. This achieves better smoke gas tightness, as the flange is pressed against the wall or ceiling via the wall section.

[0032] The flange must not be so thick that the gap between the collar (i.e., the wall part and the fastening part) and the wall or ceiling becomes so large that secure installation of the fire protection collar is no longer possible. It should therefore be selected so that the fire protection collar seals the component opening and can be easily mounted to the wall or ceiling.

[0033] A further advantage of the flange is that intumescent material lies directly on the wall or ceiling and thus, in the event of a fire, the intumescence is also directed towards the wall or ceiling penetration and not just radially inwards towards the pipe or cable, which provides additional tightness.

[0034] The wall section can be the sheet metal casing of a conventional fire protection sleeve. Alternatively, the wall section can be formed from a flexible fabric or similar material that is sufficiently dimensionally stable in the event of a fire so that the intumescent pressure generated by the expanding fire protection insert can be directed radially inward toward the wall or ceiling penetration.

[0035] In order to limit the expansion of the fire protection insert in the axial direction away from the cable penetration in the event of a fire as much as possible and to direct the intumescence radially inward toward the cables or wires, according to one embodiment of the invention, several radially inwardly projecting tabs are arranged along at least one circumferential line on the circumference of the wall part, which consists of a conventional sheet metal casing, in particular at least along the circumferential line on the circumference of the wall part that is opposite the wall or ceiling side. This also prevents the molded body from slipping out if tension is exerted on the molded body via the pipe or cable passing through it.

[0036] In a preferred embodiment, the tabs are arranged both on the circumferential line of the wall part facing the wall or ceiling and on the circumferential line of the wall part facing away from the wall or ceiling. It is particularly advantageous if the plurality of radially inwardly projecting tabs on the circumferential line facing the wall or ceiling are encompassed by the flange of the fire protection insert. The flange formed by the notch and the tabs interact particularly advantageously when the tabs engage in the notch in the shaped body that forms the flange. This ensures that the shaped body sits very firmly in the sleeve and additional pressure can be exerted on the flange. In addition, the fact that the shaped body encompasses the tabs prevents the flange from being bent over and thus not sitting properly against the wall or ceiling.

[0037] To install the fire protection sleeve according to the invention, the wall section is first cut to the appropriate size or selected according to the fire protection insert and placed around the fire protection insert. The size of the fire protection insert must be selected to be at least large enough to ensure that the cross-section of the pipes or cables to be sealed is adequately covered by the base area of the fire protection insert. Oversizing, i.e., a larger circumference of the fire protection insert, is not critical and is advantageous if the intention is to expand the seal by subsequently inserting additional pipes and / or cables, since then no new fire protection sleeve needs to be installed, but the existing one can be easily adapted.Then, when installing the fire protection sleeve after the wall or ceiling penetration has been filled with pipes or cables, the fire protection insert is cut into and just enough material is cut out, preferably from the central area, so that the fire protection insert can be pressed against the pipes or cables with light pressure when the sleeve is applied. This ensures smoke gas tightness. The fire protection sleeve prepared in this way is mounted to the wall or ceiling using standard fastening parts, such as hooks that can engage in the wall section and have an opening for the fastening device, such as a screw, so that the fire protection insert is pressed against the surface of the wall or ceiling and seals all gaps.

[0038] The invention is described in more detail using preferred embodiments. They show: FIG. 1 shows a schematic view of the fire protection insert according to a first embodiment of the invention; FIG. 2 shows a schematic view of the fire protection insert according to a further embodiment of the invention; FIG. 3 shows a schematic view (top view) of a fire protection sleeve according to the invention with the fire protection insert made of FIG. 2 ; FIG. 4 a schematic view (from below) of the fire protection sleeve from FIG. 3 ; FIG. 5 a schematic view of an unfolded fire protection sleeve.

[0039] FIG. 1shows a schematic view of a fire protection insert 10 according to a first embodiment of the invention. The fire protection insert 10 consists of a shaped body 12, which is formed in two parts, consisting of two half-cylinders 12a and 12b, and has a flange 14 that projects beyond the diameter D of the half-cylinders by the width B, wherein the flange is also formed in two parts as semicircular segments 14a, 14b, which are assigned to the corresponding half-cylinders. This flange 14 projects radially outward and forms the part of the fire protection sleeve whose flat side rests directly against the wall or ceiling. The surfaces of the abutting surface 18 of the half-cylinders shown in this embodiment are such that both surfaces are provided with studs (not visible), which are complementary to one another, so that the studs on one surface engage in the recesses between the studs on the other surface.

[0040] In the example shown, the fire protection insert 10 consists of foamed polyurethane with fire protection additives homogeneously distributed therein and is formed in two parts, wherein the half cylinders 12a, 12b are each formed in one piece, ie the half cylinders 12a and 12b and the respective flange areas 14a and 14b are produced in one piece by reaction foaming (RIM).

[0041] FIG. 2 shows a schematic view of a fire protection insert 10' according to a second embodiment of the invention. In this embodiment, the fire protection insert 10' consists of a shaped body 12', which is also formed in two parts as two half-cylinders 12'a and 12'b and has a flange 14' whose width B' corresponds to the diameter D' of the half-cylinders. The flange parts 14'a and 14'b are formed by notches 16' running circumferentially along the lateral surface of the half-cylinders 12'a, 12'b.

[0042] The FIG. 3 The fire protection sleeve shown in plan view has a wall part 1 with two half-shell-like elements that can be pivoted relative to each other via a common pivot axis 4. The end regions of the wall part 1, which are opposite the pivot axis 4, are formed by a radially projecting closure 5, which serves to clamp the wall part 1. The clamping is achieved by means of at least one clamping screw 6.

[0043] The wall part 1 consists of a sheet metal profile on which several radially inwardly projecting tabs 7 are arranged along at least one circumferential line on the circumference of the wall part 1 to form a substantially circular shape. Two radially outwardly projecting fastening parts 2 extend along the end faces of the wall part 1. The tabs 7 allow the reception and guidance of an insert 10, 10' with fire-retardant properties.

[0044] The wall part 1 has several evenly distributed, essentially radially projecting tabs 3 around its circumference, which, in conjunction with at least one fastening part 2, serve to secure the pipe sleeve to the surface of the wall or ceiling. The pipe sleeve shown encloses a cable run 20, which is routed through an opening in a structural component.

[0045] Alternatively (not shown), the cuff can be made from a cut-to-length piece of continuous band. In general, the cuff can be any known cuff suitable for the specific purpose.

[0046] In FIG. 4 is the FIG. 3 The fire protection sleeve shown is shown from below. This shows that the flange 14' of the shaped body 12' of the fire protection insert 10' lies over the tabs. The tabs engage the notch 16' of the shaped body 12' forming the flange 14'.

[0047] FIG. 5shows the structured surface of the abutting surface 18, 18' of the two half-cylinders 12a, 12'a and 12b, 12'b, which comprise the molded body 10, 10'. The structured surface is formed in the figure by regularly arranged elevations in the form of knobs 30.

Claims

1. Fire protection sleeve comprising an intumescent fire protection insert (10, 10') designed as a resiliently deformable shaped body (12, 12') which completely fills a space (8) spanned by a wall part (1), a wall part (1) which surrounds the fire protection insert (10, 10') and on the inside of which the fire protection insert (10, 10') is arranged, and at least one fastening part (2) projecting radially outward in the region of at least one end face of the wall part (1), the shaped body (12, 12') being formed in two parts, characterized in that the two surfaces of the abutting surfaces (18, 18') of the two-part elements (12a, 12b, 12'a, 12'b) are structured.

2. Fire protection sleeve according to claim 1, characterized in that the two-part shaped body (12, 12') is designed as a cube, cuboid, prism or cylinder.

3. Fire protection sleeve according to claim 2, characterized in that the shaped body (12, 12') is designed as a cylinder and is formed by two semi-cylindrical elements (12a, 12b, 12'a, 12'b).

4. Fire protection sleeve according to any of the preceding claims, characterized in that the structured surfaces are formed by regularly or irregularly arranged protruding elements (30).

5. Fire protection sleeve according to claim 4, characterized in that the protruding elements (30) themselves have different or identical geometries and / or dimensions.

6. Fire protection sleeve according to claim 5, characterized in that the protruding elements (30) are pyramidal, conical, hemispherical or knob-shaped.

7. Fire protection sleeve according to any of claims 4 to 6, characterized in that the protruding elements (30) are of the same or different heights.

8. Fire protection sleeve according to claim 7, characterized in that the height of the protruding elements (30) varies in an alternating or irregular manner.

9. Fire protection sleeve according to claim 8, characterized in that the protruding elements (30) are between 5 mm and 50 mm tall.

10. Fire protection sleeve according to any of the preceding claims, characterized in that the structured surfaces of the abutting surfaces (18, 18') of the two-part elements (12a, 12b, 12'a, 12'b) are complementary to one another.

11. Fire protection sleeve according to any of the preceding claims, characterized in that a plurality of radially inwardly projecting tabs (7) are arranged along at least one peripheral line on the periphery of the wall part (1), the plurality of radially inwardly projecting tabs (7) preferably being arranged at least along the peripheral line on the periphery of the wall part (1), which line is opposite the wall or ceiling.

12. Fire protection sleeve according to any of the preceding claims, characterized in that the height of the shaped body (12) is greater than the width of the wall part (1), so that the shaped body projects beyond the wall part (1).

13. Fire protection sleeve according to any of the preceding claims, characterized in that the shaped body (12) has a flange (14) extending at right angles to the shaped body (12) on the main surface facing the wall or ceiling.

14. Fire protection sleeve according to any of claims 1 to 13, characterized in that the shaped body (12') has a flange (14') on the main surface facing the wall or ceiling, the flange (14') being formed by an indentation (16') extending in the peripheral direction of the lateral surface of the shaped body (12'a, 12'b), such that the diameter (D') of the flange (14') corresponds at least to the diameter of the shaped body.

15. Fire protection sleeve according to claim 13 or claim 14, characterized in that the diameter of the flange (14, 14') corresponds at least to the outer diameter of the wall part (1), and / or the thickness of the flange (14, 14') is selected such that the fire protection sleeve can be easily mounted on the wall or ceiling, and / or such that the plurality of radially inwardly projecting tabs engage in the indentation (16') of the shaped body (12') forming the flange (14').