DE1963795U - METAL PIPE OR FITTED FOR DRAINAGE. - Google Patents

Description

P.A.092 467 * 2/18/67

DIPL-ING. HELLMUTH KOSEL DIPL .-! NG. HORST ROSE DIPL.-ING. PETER KOSEL 'PATENT LAWYERS

3353 Bad GandersJiehn, February 17, 1907 Braunschweiger Str. 22

Telephone: (05382) 342

Telegram address: Siedpatent Bad Gandersheim

Karl Heinz Vahlbrauk
Registration application dated February 17, 1967

Karl Heinz Vahlbrauk "Bad Gandersheim
Kriegerweg 1

Pipe or fitting of metal for drainage pipes

The utility model refers to a pipe or shaped piece Of metal for drainage pipes for installation purposes with a plastic coating.

In the case of pipes or fittings for drainage lines, on the one hand the chemical resistance and on the other hand placed high demands on the resistance to strong temperature fluctuations. It is already known for such Pipes or fittings to use steel and these steel pipes or fittings with a plastic coating to provide. However, such steel pipes have the disadvantage of a relatively large weight, which is useful for transport, Storage and assembly purposes is important. For this reason, this would be an option for pipes or fittings for drainage lines Aluminum or its alloys, as this metal is light in weight and has good heat dissipation. It However, pipes and fittings made of aluminum or aluminum alloys are not even suitable for use as drainage pipes suitable because such pipes and fittings lack the desired chemical resistance, in particular alkali resistance. A plastic coating from such pipes or fittings

Bank account: Braunschweigische Staatsbank, Bad Gandersheim branch, account no. 22.Π8.970 · Postal checking account: Hannover667Ί5

2149/26 Rö / He

Aluminum or its alloys for drainage pipes So far not / has become known because the previous plastic coatings do not have sufficient adhesion in particular with the changing thermal loads in drain lines.

The utility model is based on the task of creating a pipe or fitting of the type specified at the outset which, on the one hand, has the lowest possible weight and, on the other hand, fulfills as far as possible all the requirements that are to be placed on a part of a drain pipe for installation purposes, namely the largest chemical resistance and best adhesion of the plastic coating to the strongly changing thermal stresses of such drainage pipes and also to the mechanical stresses. According to the utility model, this is achieved in that the metal body of the pipe or extensions are made of aluminum or an aluminum alloy and this metal body is provided with a plastic coating on all sides with the interposition of a layer of an adhesion promoter. A synthetic resin-based adhesion promoter is advantageously used here. It is also particularly useful if polyvinyl chloride is used as the coating material. The metal body made of aluminum or the aluminum alloy ensures, on the one hand, the particularly low weight and, on the other hand, good heat dissipation of the pipe, right? _o rmstückes. The coating made of plastic, preferably polyvinyl chloride, has a particularly high chemical resistance and freedom from pores, the adhesion promoter ensures the adhesion of the coating to the metal body required for the thermal stresses, with the all-round coating providing the complete | ensures proper protection of the inner metal body.

In the drawing, an embodiment of the utility model is shown. The drawing shows half a longitudinal section of two connected by a sleeve Pipes for a drainage line.

The tubes Tund 2 initially consist of an inner one Metal body3 made of aluminum or an aluminum alloy. The drawn pipe part 1 can also be used as a continuation of the

2 -

R _o hrteils be regarded 2 ", which results in considering a single tube with the illustrated cross-sectional shape. The metal body 3 is provided on all sides with a coating 4 of polyvinyl chloride.! Polyvinyl chloride is between the metal inner body 3 and the covering 4 of a layer 5 of an adhesion promoter switched on based on% instharz.

Claims (2)

I.Π «Claims for protection 1. Pipe or F _o ^rm piece ^a us metal for discharge lines for the installation, with a plastic coating, characterized in that the metal body (5) of the pipe or fittings, made of aluminum or an aluminum alloy and this metal body on all sides with the interposition of a layer (5) an adhesion promoter is provided with a coating (4) made of plastic. 2. Hohr or fitting according to claim 1, characterized in that that the intermediate layer (5) consists of an adhesion promoter based on synthetic resin. 3 pipe or fitting according to claims 1 and 2, characterized in that the coating (4) consists of polyvinyl chloride. Patent, an wc I to üipl.-ing. MsSImuih Kose! Bipl-Img. S-3 © F s t i δ s ® Dipl = Imi6j "Pa-" "