Flange connection

Pipe joints or couplings – Flange

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Details

285424, 285363, F16L 2300

Patent

active

049402641

ABSTRACT:
In the case of a flange connection for rectangular air conditioning ducts which have four walls, four flange profiles with four rectangular angle-pieces are fitted frame-wise on the end of a duct portion. The flange profiles are in this case subhstantially L-shaped hollow profiles which are in each case fitted onto a duct wall and fixed there with a plurality of spot welds. Problematical is the seal between the inner arm of the flange profile and the duct wall, because by reason of spot welds which are situated close to but at a distance from one another, air can flow out into the free atmosphere between them and over the end face of the duct wall. In order to achieve better tightness, there is formed into the hollow profile a bead extending from the front radial portion. An inner arc of the bead lies with a clamping fit on the top of the duct wall and presses it against the inner longitudinal arm so achieving a seal which it is possible easily to implement in manufacture. The arc and the arc which merges into the inner longitudinal arm have relatively large radii, so that manufacturing the profile on a profile rolling plant presents no difficulties. Application: to the manufacture of prefabricated partial ducts for rapidly assembling air conditioning ducts, for purposes of ventilation, heating or cooling large projects.

REFERENCES:
patent: 4123094 (1978-10-01), Smitka
patent: 4288115 (1981-09-01), Sullivan
patent: 4304423 (1981-12-01), Mez
patent: 4508376 (1985-04-01), Arnoldt

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