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Finned Tube
Thermal Transfer Corporation specializes in the manufacture of high frequency welded finned tubing and the supply of both cast
iron protected and parallel welded finned tubes. These tubes are major components of economizers, heat recovery boilers and many
other industrial heat exchanger applications. All finned tube configurations are tailored to the customer's specific process
needs and the flue gas characteristics.
- High frequency welded finned tubes
are available with plain (solid) or serrated fins, and are preferred for their heat transfer performance, durability
and resistance to thermal stress. Serrated fins are used for clean applications such as natural gas firing and solid
fins where dusty or abrasive conditions exist. HF welded finned tubes are available in carbon, alloy or stainless
steels to a maximum length of 78 feet, in tube diameters from 1 inch to 6-5/8 inches and fin densities from 2 to 7 fins
per inch.
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Cast iron protected finned tubes
are used where flue gases may contain corrosive and/or abrasive substances, such as from coal or heavy oil combustion
and waste incineration. Cast iron protected tubes are resistant to corrosion and particularly suited where temperatures
are below the flue gas acid dew point. Base tubes are seamless carbon steel and the fins are made of cast iron, in tube
diameters from 1-1/2 to 2 inches, to a maximum length of 32 feet.
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Parallel welded finned tubes
are frequently used under the dusty or abrasive flue gas conditions typically produced by coal and heavy oil
firing or waste incineration processes. The parallel alignment of the fins allows easier cleaning of the tubes and
reduced flue gas pressure drop. Tubes and fins are made of carbon steel to a maximum length of 50 feet, in tube
diameters from 1-1/4 to 2 inches, with a minimum fin pitch of 2.5 per inch.
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