FI20195254A1 - Fire stop in a pipe joint - Google Patents

Abstract

The invention relates to a pipe connection arrangement and a fire protection device connected thereto (11). The arrangement comprises (i) a metallic main pipe (2), which is located substantially within a first fire cell (8); a plastic tube (3) located substantially within a second fire cell (9); and (iii) a pipe connection (7) between the main pipe (2) and the plastic pipe (3). A fire protection device (11) has been installed in connection with the pipe connection (7) around the plastic pipe (3) so that it has been supported in the main pipe (2) with at least one fastening device (12).

Description

PIPE CONNECTION FIRE PROTECTION

Background of the invention

The present invention relates to a pipe connection. In other words, the invention relates to a pipe connection, where a pipe inside the building, preferably a plastic pipe, — is connected to a frame pipe outside the building. In particular, the invention relates to a fire break that is organized around a pipe connection.

When the piping system inside the building is renewed, for example in connection with pipe renovation, it would often be advantageous to replace the metal pipes with plastic pipes. In this case, fire safety may become a problem. The metal body pipe and — the plastic pipe entering the interior are both in different fire departments. When a fire breaks out, the fire may spread from one fire department to another along a pipe. Since the plastic pipe is often a flammable material, such as polyethylene or polypropylene, the pipe itself may catch fire, accelerating the fire. — Publication US-A-5105592 describes a fire-preventing arrangement in which a metal fire collar containing a material that expands in heat is placed around the pipe.

Publication US-A-20180135739 describes a pipe connection with a tightening collar around it. The tightening sheath contains fire-resistant material and a 25 heat-insulating material. < ? The publication DE-A-102005048148 describes a fire protection sheath around the branch point 7 of a plastic pipe. The diaper contains heat-expanding material

E material in every fire situation flattens the plastic pipe and thus prevents fire

D along the pipeline.

LO o > 30 The use of fire cuffs is generally known in the industry. Normally, the fire cuff is attached to wall structures, for example with screws.

Brief description of the invention

The present invention comprises a pipe connection, which comprises (i) a metal main pipe (2) essentially inside the first fire compartment (8); (ii) the plastic pipe (3) inside the second fire compartment (9); (iii) pipe connection (7) — between body pipe (2) and plastic pipe (3); and (iv) the fire prevention arrangement (11) installed around the plastic pipe (3) in connection with the pipe connection (7), where the fire prevention arrangement (11) is supported on the main pipe (2) by at least one bracket (12). — Brief explanation of the patterns

Figure 1 shows a schematic view of the arrangement according to the invention.

Figure 2 shows a diagram of one embodiment of the pipe connection according to the invention. — Figure 3 shows a diagram of the second embodiment of the pipe connection according to the invention. = Detailed description of the invention

N x Fire compartment refers to a space that is essentially limited to fire-resistant

S 25 — for wall, ceiling and floor structures. The facility is thus designed in such a way that = if a fire breaks out, the fire cannot spread outside the fire department.

D In the text below, the terms "fire stop" and "fire prevention arrangement" are 3 used in the same sense to describe around the pipe connection

N installed arrangement, the purpose of which is to prevent the spread of fire — along the pipe from one fire compartment to another.

Trunk pipes in buildings are often made of metal, such as stainless steel. The drainage of apartments is often arranged in such a way that the individual sewer outlets are connected to one or more discharge pipes, which are then connected to the trunk line. The sewer outlets and discharge pipe, on the one hand, and the trunk line, on the other hand, are located in different fire departments.

When the drainage of apartments is renewed, it would often be advantageous to replace the old metal pipes with plastic pipes. For fire safety reasons, however, this has not always been possible. Therefore, the old sewer pipes have been replaced with metal pipes, which has increased the costs of pipe repair.

Figure 1 shows a diagram of a pipe connection to which the solution according to the invention is applicable. The figure shows two fire departments, the first fire department (8) and the second fire department (9). Between them is a partition (1) made of fire-resistant material, such as concrete. There is an opening (10) in the wall, through which the main pipe (2) is brought from the first fire compartment (8) to the second fire compartment (9). The body tube (2) is connected to the plastic tube (3) — with a tube connection (7). The opening (10) is typically sealed with fire insulation (5).

The fire insulator (5) can be any fire insulating material known in the field, such as mineral wool.

As stated above; the old body pipe (2) is typically metal, typically cast iron, but can also be steel, such as stainless — steel. If the old frame pipe (2) is still in good condition, it can = be left in place and in that case only the outlet pipes 3 of the apartment or apartments are replaced with plastic pipes (3). It is also possible that the frame tube (2) = has to be replaced. In this case, it is advantageous to replace it with a new z metal pipe. x 30 The diameters of the frame tube (2) and the plastic tube (3) are those commonly used in the field, such as 32 mm, 75 mm, 100 mm or 150 mm.

S

The pipe connection (7) can be made in any manner known in the field. Therefore, it can be implemented, for example, with a flange, threaded connection or welding.

A suitable connecting piece can also be used in connection (7).

Figure 2 shows one embodiment of the invention. In this embodiment, the fire prevention arrangement (11) consists of a fire prevention tape (6) wrapped around a plastic pipe (3) and a sheath (4) surrounding it. The sheath (4) is supported on the frame tube (2) by a bracket (12), which can be, for example, a metal collar placed around the frame tube (2). The sheath (4) extends over the pipe connection (7) and covers the fireproof tape (6) wrapped around the plastic pipe (3).

The fire retardant tape (6) is made of a material that expands in heat.

When a fire starts, the expanding material is pressed against the plastic tube (3), finally squeezing the plastic tube (3) together. The role of the sheath (4) is to prevent the heat-expanding substance from expanding outwards, whereupon the expanding substance compresses the plastic pipe (3) and thus prevents the fire from spreading along the pipeline. — In Figure 2, the bracket (12) forms the end of the jacket (4). However, this does not necessarily have to be the case. The bracket (12) can also be separate from the end of the sheath (4). In this case, the sheath (4) can be supported on the bracket (12) with, for example, screws or bolts. It is also possible to support the sheath (4) on the bracket (12) using fastening elements (14), as shown in Figure 3.

The sheath (4) can preferably be made from one or more, preferably

S from two or more discs. The plate or plates are bent around the frame tube (2) + and the plastic tube (3) into the desired shape and joined together. Connection or ? the joints can be made by any known method, such as 7 welding, riveting, or tightening. The sheath (4) is advantageously manufactured

E 30 — from a non-combustible material such as metal or fiberglass. Very

Preferably, the sheath (4) is made of metal, such as iron or steel. 2 The sheath (4) can also be formed from a protective tube placed around the frame tube (2) and the plastic tube (3) at the joint. An inexpensive embodiment

According to 5, such a protective pipe is made around the connection point (7) by joining two trough-like parts together. According to another advantageous embodiment, the protective tube is a tube, for example a metal tube, whose inner diameter is larger than the outer diameter of the body tube and the plastic tube.

The thickness of the jacket (4) is otherwise not critical, but it must be sufficiently stiff to prevent the expanding material (6) from expanding outwards from the tube (3). Commercially available tapes such as FS-195 (3M) or sheets such as Palusol (BASF) can be used as the expanding material (6). Plates or tape made of expanding material can be wrapped around the plastic pipe (3) or attached to the inner surface of the jacket (4) in such a way that they are placed on the side of the plastic pipe (3) from the joint (7).

The jacket (4) is fixed in place with the help of at least one fastener (12) mounted on the frame tube (2). Preferably, at least one bracket (12) comprises means for fastening the jacket (4), for example with screws or bolts and nuts.

Alternatively, at least one bracket (12) can press the edge of the jacket (4) against the outer surface of the body tube (2).

There can be more than one bracket (12). In this case, for example, one bracket (12) can act as a limiter when the sheath (4) is slid into place along the frame tube (2). The sheath is tightened in place on the second fastener (12).

According to a preferred embodiment, at least one bracket (12) is a collar to be tightened against the outer surface of the frame tube o 25 (2).

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5 The space between the outer surface of the plastic tube (3) and the sheath (4) should be large enough so that ? strips or sheets of expanding material (6) can be suitably wrapped around the pipe 7. On the other hand, the gap must not be so large that when the expanding material (6) expands, it just fills the space between the pipe (3) and the jacket (4),

D 30 — and can't squeeze the pipe (3) together. The recommended structure is such that 3 the strips made of the expanding material (6) just fill the sheath (4) and

of the space left between N pipes (3). In this case, when the material (6) expands due to heat, it starts to squeeze the plastic tube (3) together.

— Figure 3 shows another embodiment of the invention. In this embodiment, the fire prevention arrangement (11) consists of a fire cuff (13), fastening elements (14) and a bracket (12). The fire break collar (13) is installed around the plastic pipe (3). The fire break cuff (13) is an arrangement that, in the event of a fire, compresses the plastic pipe (3). It may contain a substance that expands in heat as described above. It can also comprise a mechanical spring which, in the event of a fire, squeezes the plastic tube (3) together, as described in publication US-A-4796401.

Firestop cuffs are generally commercially available.

In the arrangement according to Figure 3, the bracket (12) attached to the frame tube (2) can be, as previously described, a metal strap attached around the frame tube (2). Fastening elements (14) parallel to the pipe are connected to the bracket (12). The fastening elements (14) extend over the pipe connection (7) around the plastic pipe. The fire break sleeve (13) is attached to the fastening elements (14) in a suitable way. For example, it is possible that — the fastening elements (14) have supports for screw and nut fastening, with which the firestop collar (13) is screwed into place. When proceeding in this way, the fire stop cuff (13) can be placed inside the second fire compartment (9).

The advantage of such an arrangement is that there is space around the body pipe (2) and the plastic pipe (3) around the connection point (7), so that the installation work can be easily — carried out. One or more fasteners (12) connected to the frame tube (2) enable the sheath (4) or fastening elements (14) and the firestop collar = (13) or the fire ceiling strip (6) to be attached to the desired location, in which case the joint (7) 5 does not necessarily have to be a support structure (such as wall) in the vicinity. ? Naturally, the pipe connection (7) according to the invention can also be placed near a wall (1) or another support structure, such as an opening (10) made in the wall (1).

S Fastening elements (14) are preferably rods or plates parallel to the pipe, > such as metal rods or metal plates. They must be stiff enough to hold the firestop collar (13) firmly in place. In accordance with the invention

— in the arrangement, the fastening elements (14) can also form a closed sheath around the body tube (2) and the plastic tube (3).

Also in this embodiment, there can be more than one bracket (12).

In this case, for example, one bracket (12) can act as a limiter when the sheath (4) is slid into place along the frame tube (2). The sheath is tightened in place — on the second fastener (12).

According to a preferred embodiment, at least one bracket (12) is a collar that can be tightened against the outer surface of the frame tube (2).

In Figures 2 and 3, the pipe joint (7) and the firestop tape (6) or the firestop cuff (13) are installed on the straight part of the pipe. According to the invention, however, it is — also possible that the joint (7) and the firestop tape (6) or the firestop cuff (13) are on a curved part, for example a 90 * curve.

The pipe connection according to the present invention with its fire prevention arrangements is quick to manufacture and install. The jacket and fireproofing arrangement can be manufactured at the installation site. The arrangement is affordable. In addition, the arrangement according to the invention is flexible, because the arrangement does not have to be close to the finished support structure. oO

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Claims (15)

PATENT CLAIMS 1. A pipe connection comprising (i) a metal body pipe (2) essentially inside the first fire compartment (8); (ii) the plastic pipe (3) inside the second fire compartment (9); (iii) the pipe connection (7) between the body pipe (2) and the plastic pipe (3); and (iv) a fire prevention arrangement (11) installed around the plastic pipe (3) in connection with the pipe connection (7), characterized in that the fire prevention arrangement is supported on the main pipe (2) by at least one bracket (12). 2. A pipe connection according to claim 1, characterized in that the metal body pipe (2) is made of cast iron. 3. Pipe connection according to claim 1 or 2, characterized in that at least one fastener (12) is a collar tightened around the main pipe (2). 4. Pipe connection according to claim 3, characterized in that the flange is made of metal. 5. A pipe connection according to one of claims 1 to 4, characterized in that the fire protection arrangement comprises o S a fire stop cuff (13) installed around the plastic pipe (3), which is supported on a bracket (12) installed around the main pipe (2) N + at least one fastening element O - ( 14) using. O - 30 a 6. Pipe connection according to claim 5, characterized in that at least D one fastening element (14) is one or more metal rods or 3 metal plates. IS 7. A pipe connection according to one of claims 1 to 4, characterized in that the fire prevention arrangement (11) comprises a firestop tape (6) wrapped around the plastic pipe (3) and a jacket (4) surrounding the pipe connection (7) and the firestop tape (6). 8. Pipe connection according to claim 7, characterized in that the sheath (4) is attached to the bracket (12) with screws, nuts or both. 9. A pipe connection according to one of claims 7 to 8, characterized in that the jacket (4) is made of one or more plates bent around the body pipe (2) and the plastic pipe (3). 10. Pipe connection according to claim 9, characterized in that one or more plates are metal. 11. A pipe connection according to claim 7 or 8, characterized in that the jacket (4) consists of a protective pipe installed around the pipe connection (7). 12. A pipe connection according to claim 11, characterized in that the protective pipe is made of two trough-like parts by joining them together around the pipe connection (7). 13. A pipe connection according to claim 11, characterized in that the protective pipe o consists of a finished pipe whose inner diameter is greater than the outer diameter of the body pipe (2) > and the plastic pipe (3), and which is installed x 30 to surround the pipe connection (7) and the firestop tape (6) and attached = to bracket (12). j < 14. A pipe connection according to one of claims 11 to 13, characterized in that the protective pipe A is made of metal, for example stainless steel. 2 35 N 15. Pipe connection according to one of claims 1 to 14; characterized in that the frame pipe (2) extends to the inside of the second fire compartment (9) and the pipe connection (7), the fire prevention arrangement (11) and at least one bracket (12) are located inside the second fire compartment (9). oO O N + <Q O I = + LO N LO o O N