1980198519901995200020052010(year)Comparative performance ratio of a single pipe(base value of 100%)History of improvements of internallygrooved copper tubes0100200300400500600700Trapezoidal grooves andns that are more numerous,shorter and havea higher lead angleTrapezoidal grooves andtaller and slimmer nsTrapezoidal groovesand slimmer nsTrapezoidalgrooves TriangulargroovesHeat performance ratio(actual evaporation/potentialevaporation coecients)Condensation performance ratio(condensation coecient)CondensationEvaporation120175200250275200250275375425Heat pipe-fitted heat sinkMachined heat transfer tubesAxle bearing oil coolant tubeInternally grooved copper tubesCLOSEUPThe copper tubing business strives to accurately meet the diverse needs of customers by drawing from its many years of product development. Applying this extensive expertise, it has increased the heat transfer performance of copper tubes by improving the grooved coils inside them and developed a new product under the brand name DANT to prevent refrigerant gas leakages of air-conditioning equipment.Applying many years ofexpertise to develophigh-performance productsAdvantage1The UACJ Group manufactures copper finished and machined products in addition to copper and copper-alloy tubes and pipes. It develops and supplies high-performance finished products that demonstrate excellent thermal efficiency based on performance tests. Serving as a one-stop supplier handling everything from product design through to mass production, UACJ’s copper tubing business helps customers speed up their manufacturing operations. A one-stop supplier ofhigh-performance machinedcopper tubing productsAdvantage2Japan’s construction industry is currently facing a shortage of construction workers and difficulties in passing down skills to new workers. In an effort to help deal with these issues, UACJ’s copper tubing business has developed air-conditioner pipe joints called RG Press, which require no welding, as well as specialized tools for the product. By using this product, construction companies can reduce the time needed for installation work and maintain good piping quality independent of the skill levels of their workers. Developing products in response to needs at construction sites20
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