Flange and flued bellows can be the right answer to piping, ducting and vessel thermal growth problems over that of conventional thin walled metal bellows.
The advantages of a heavy convolution (with thicknesses up to 1/2") is its ability to hold up to mechanical damage. Dents and gouges create stress risers in thin bellows which results in fatigue cracks over time. Cracking of any type is very difficult to weld repair on thin bellows (typically .06" wall or thinner) but can be performed with plant maintenance staff on heavy walled bellows. The thicker wall also hold up better to corrosion attacks - an added benefit is the common use of carbon steel material which is almost never used on thinner bellows in lieu of stainless steel or nickle alloys. drain couplings can also be added to the bottom of the flanged and flued convolution to prevent a build up of condensate. The most common application for flanged and flued expansion joint is ASME code heat exchangers, and is the preferred bellows of choice as the movement is exclusively axial. The heavy walled, deep convolution is durable, and should last the life of the exchanger. The down side to the heavy wall design is the increase in stiffness which can over-stress the heat exchanger tube sheet. Many engineering firms have banned the use of thin walled bellows expansion joints in process piping due to fear of field misapplications that may result in a failure. With a flanged and flued bellows those fears are unfounded as the heavy wall is about as fool proof an expansion joint as can be expected. Read more: Flange And Flued Bellows Expansion Joints http://www.sooperarticles.com/shopping-articles/product-reviews-articles/flange-flued-bellows-expansion-joints-55034.html#ixzz1jC4iRTMW Mica, at a news conference in Winter Park on Monday, said he might support only a portion of the route, from the airport to Walt Disney World, because it has the potential to draw tourists. The remainder of the leg, he said, could be a money loser. "The last thing I want is for this to be a boondoggle," he said.
But state Sen. Paula Dockery, R-Lakeland, predicted at the convention center that Scott ultimately would back the train. "His entire campaign is about jobs, jobs, jobs. I don't know of any other project that can do that with so very little investment on our [the state's] part," said Dockery, serving on Scott's transition team. That promise was good news to Randall Boggess, who manages a metal-fabrication plant in Mulberry in Polk County. It makes more sense to spend money on a high-speed train rather than on unemployment benefits and welfare, he said. "We're already spending the money," he said. "That's all moving out with no return. That's failure." Dan Tracy can be reached at [email protected] or 407-420-5444. We supply 3/16" thick up to 3/8" thick expansion joints from 16" pipe size up to 20'-0" O.D. in both carbon steel and stainless. We believe the flanged and flued type expansion joints we produce out last the thin metal bellows type. Call for free estimate on your project!
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AuthorRandall L Boggess Plant Manager Archives
January 2013
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