What are the most important manufacturers of flanges for wind turbine towers in the USA?
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North American Wind Power magazine is also a good reference, they should be on the web too.
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Kopin Corporation\nTaunton, MA\nUSA\n\nRead more about it on  http://sst.pennnet.com/Articles/Article_Display.cfm?Section=Archives&Subsection=Display&ARTICLE_ID=165285
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Sail boating.  I guess electric companies in CA. they use those huge electricity generating windmills.  Glider manufacturing.  Kite makers although I don't know if you would consider that an industry.
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The manufacturers website?
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Try http://www.monstertower.com/.  They make a very solid universal tower.
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http://www.worldcement.com/Cement/WC_industrylinks.htm
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Of the ones you listed Aluminum would be the best mostly because it is a metal.
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The number one company is called Golf Design USA http://www.golfdesignusa.com/
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Worthington Elite Ltd.\n\nStylistic Creations & Co\n\nCustom Elite Builders
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AMERICAN WINDMILLS \nFARM STYLE WINDMILLS for pumping water, aerating or just for fun as a garden toy. \n\n\nAmerican Windmills is dedicated to the preservation, restoration and sale of the Old Farm Style Water Pumping Windmill and Hand Pump systems.  We specialize in the AERMOTOR Windmills with a rebuilt motor that has oil seals and roller bearings.  THIS Aermotor windmill is the BEST motor you will find on the market.  My Aermotor won't leak and will start up in the slightest PUFF of wind.   From the outside, the Windmill blades and tail will look like it's been up at your place for years, but the motor guts and the internal spinning parts will be brand new.  Since you can't see these parts, it will LOOK old with a beautiful patina.   Most of these Windmills come from California where there isn't ANY rust.  We put a FULL 10 year warranty on these windmills.   Here's my e-mail if you need to get a hold of me. \n\nEllen Sattler\n\n\n\n***If you don't get a response from an e-mail you've sent, it doesn't hurt to follow up with a phone call.  My e-mails have been sketchy, at best.  My Spam filter is WAY too unkind! \n\n530-644-3008...after 8 AM pacific time please\n\n\n\nMy mantra is: "Pleasure in the job puts perfection in the work."\n-Aristotle (384 - 322 BC)\n\nWe have new AERMOTOR windmills and towers.  Give me a shot at pricing the new one.  My prices are cheaper than purchasing from the factory.  I guarantee it.\n\n\n\nWe carry Handpumps, which are now on sale, towers, pump cylinders, pump rod, adapters, replacement parts and manuals with parts diagrams for Baker Monitor Windmills, Dempster Windmills, and AERMOTOR Windmills.  \n\nDo you need a manual for a windmill you have?  Give me an e-mail with the make and model number on the gear box.\n\nWe now carry the aerator windmills called the Koenders which are now on sale too!. \n\n Do you need wood tower plans?  I have them for a 25' tower up to 47' for $100.  This will include the informational packet, a $35 value.   . Give me an e-mail and ask.\n\n\n\nI'm chock full of knowledge about the water pumping system.   This IS your ONE STOP Windmill Store!  We also have a machine shop dedicated to making hard to find Windmill and hand pump parts!   Please take a minute to Bookmark this site.\n\n\n\nIn my travels, both throughout the country and on the net, I've found others that claim to be in the Windmill business.  They say that they're selling a Windmill that is "rebuilt" but it might not even be rebuilt at all, just painted or a few parts exchanged.  My advice to you is the old adage; "you get what you pay for!"  My dad always said "You're never sorry if you buy quality".  At AMERICAN WINDMILLS you will ALWAYS buy quality AND all of my rebuilt products are backed with a FULL 10 year guarantee!  If you like this web page and it helps you, then you'll love my customer service and product.    I answer the phone 7 days a week, 24 hours a day (almost)!   Be nice; PLEASE don't call before 8:00 AM pacific time in California!   530-644-3008 and ask for Ellen\n\n\n\nClick on this picture for a larger view of Paul and Ellen!\n\n\n\n\n\nI have a number of Windmills to choose from...depending on your budget and what would fit on your property.  My windmills start at $50 including the freight.  Check out these links:\n\n"Garden toy" miniature windmills and pumps from $50 to $205 including the shipping to your door.\n\nBeautiful Rebuilt Original Chicago AERMOTOR Windmills from $2950 including a 10 year warranty.  These windmills have the top of the line gear boxes.  Paul and Ron have come up with an oil seal, roller bearing model that not only will turn on the slightest puff of wind (3 MPH), AND they are guaranteed NOT to leak for 10 years. I even have a gearbox that doesn't require oil if you're not going to pump.  If you're tired of maintenance or oil on the tower
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Thnaks for asking! I am a business librarian, so I will consult Hoovers business database for the most current, accurate information.\n\nThe top twelve US steel foundries are listed by total 2005 sales:\n\n(1) Cargill, Incorporated ($71,066,000,000) \n\n(2) United States Steel Corporation ($14,039,000,000)\n\n(3) Nucor Corporation ($12,701,000,000) \n\n(4) Commercial Metals Company ($6,592,700,000)\n \n(5) AK Steel Holding Corporation ($5,647,400,000) \n\n(6) The Timken Company ($5,168,400,000) \n\n(7) Allegheny Technologies Incorporated ($3,539,900,000) \n\n(8) Precision Castparts Corp. ($2,919,000,000) \n\n(9) Steel Dynamics, Inc. ($2,184,900,000) \n\n(10) Quanex Corporation ($1,969,000,000)\n\n(11) Wheeling-Pittsburgh Corporation ($1,560,500,000)\n\n(12) Oregon Steel Mills, Inc. ($1,258,000,000)
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The Sears Tower is an example of the revolutionary bundled-tube structural design. Tube buildings gain most of their structural support from a rigid network of beams and columns in their outer walls. The rigid outer walls act like the walls of a hollow tube. The Sears Tower is actually a bundle of nine tubes, and is considered one of the most efficient structures designed to withstand wind. This is a great design for a skyscraper in Chicago, the "Windy City," where the average wind speed is 16 miles per hour. As the building climbs upward, the tubes begin to drop off, reducing the wind forces on the building. The Tower's heavy weight -- more than 440 million pounds -- is also supported by 114 piles sunk deep into the earth so that they stand firmly on hard, solid bedrock.
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I use Penn for all of my Saltwater fishing. They stand up well to the rough conditions. Check out this reel. AND YES THEY ARE MADE IN THE USA!!\nhttp://www.pennreels.com/01_products/reels/spinning/02_spinfisher_ss/spinfisherssg_graphite/420.htm
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Top Competitors  \n•  Fountain Powerboat Industries, Inc. (FPB)  \n•  Genmar Holdings, Inc.  \n•  Sea Fox Boat Company, Inc.
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check on your manufacturers site
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Are you talking about sealing surfaces or welded connections?\n\nFor sealing surfaces you have raised face flanges that can use a flat gasket or a spiral wound gasket. There are  flanges with grooved faces that use a soft oval shaped iron ring. These are usually just called ring joint flanges. Tongue and groove flanges are also available.You can also get flat faced flanges (typically for water and other low pressure services) that can use a rubber or asbestos like gasket.\n\nThe connection of the flange to the pipe can be butt weld, socket weld, slipon, or threaded.
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The pressure rating versus temperature for these classes of flange ratings is independent of the material being contained.\n\nThe best way to get a table or chart of the relationship between pressure and temperature is to contact a pipe, valve and fitting supplier in your yellow pages. If you can't find one, try the online yellow pages for Houston, Tulsa, Oklahoma City, Dallas or New Orleans.\n\nThe actual ratings are part of copyrighted documents published by ANSI and usually aren't available for free.