In-line pressure balanced expansion joint for piping and ducting systems with circular cross section and internally located tie rods
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United States of America Patent
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Jan 6, 2015
Grant Date -
May 23, 2013
app pub date -
May 10, 2011
filing date -
May 13, 2010
priority date (Note) -
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Abstract
In-line pressure balanced expansion joint for thermal expansion compensation of piping and ducting of circular cross section with the tie rods located inside the device consists of one large, central expansion joint and two smaller, mirror-symmetrical, side expansion joints (2a) and (2b). Three expansion joints are made of bellows (3) and (9) and of straight pipe spools and annular plates welded to each other. Tie rods (15a) and (15b) are placed on a circle at equal angular intervals which connect the sides of the expansion joints. The inner surfaces of the sides of the central expansion joint are reinforced with welded rectangular radial ribs and triangular ribs. The compactness and functionality allows expansion joints for all types of piping and ducting and is particularly suitable for making expansion joints for piping and ducting with a diameter greater than 2 meters.
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