It also excels in solderability, brazability, bendability, and end processing.
Double-wound steel pipes are pressure-resistant piping steel pipes obtained by continuously and doubly winding steel strips that have been pre-treated with copper plating on both sides, and then brazing in a special furnace. In addition to pressure resistance, they also have high vibration fatigue strength, and excel in solderability, brazability, bendability, and end processing. As a pressure-resistant piping material that combines high reliability and workability, they are applied in various uses such as automotive brake tubes and power steering tubes. 【Features】 ○ High pressure resistance and vibration fatigue strength ○ Excellent solderability, brazability, bendability, and end processing ○ A pressure-resistant piping material that combines high reliability and workability For more details, please contact us or download the catalog.
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【Specifications】 ○Nominal Diameter: 4 →Outer Diameter (mm) Standard Dimension: 4 Allowable Tolerance: ±0.08 →Wall Thickness (mm) Standard Dimension: 0.7 Allowable Tolerance: ±0.08 →Guaranteed Pressure (MPa) 34.3 →Burst Pressure (MPa) 108 ○Nominal Diameter: 4.76 →Outer Diameter (mm) Standard Dimension: 4.76 Allowable Tolerance: ±0.08 →Wall Thickness (mm) Standard Dimension: 0.7 Allowable Tolerance: ±0.08 →Guaranteed Pressure (MPa) 34.3 →Burst Pressure (MPa) 108 ○Nominal Diameter: 6.35 →Outer Diameter (mm) Standard Dimension: 6.35 Allowable Tolerance: ±0.08 →Wall Thickness (mm) Standard Dimension: 0.7 Allowable Tolerance: ±0.08 →Guaranteed Pressure (MPa) 34.3 →Burst Pressure (MPa) 83.3 ○Nominal Diameter: 8 →Outer Diameter (mm) Standard Dimension: 8 Allowable Tolerance: ±0.1 →Wall Thickness (mm) Standard Dimension: 0.7 Allowable Tolerance: ±0.1 →Guaranteed Pressure (MPa) 24.5 →Burst Pressure (MPa) 66.2 ●For more details, please contact us or download the catalog.
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Company information
Usui International Industries Co., Ltd. has been striving for the development of new products since its establishment in 1941, accumulating technology and obtaining numerous patents, contributing to the development of the global automotive industry and thereby contributing to societal progress and the enriched lives of people. Usui International Industries primarily focuses on automotive piping, offering a wide range of products globally, including high-pressure fuel injection pipes for common rail systems, pulsation-reducing fuel rails for MPI, high-pressure fuel rails and connecting pipes for gasoline direct injection engines, cooling fans, fan drives (bimetal type and external control type), multi-tube heat exchangers, metal gaskets, and more, along with meticulous services. Moving forward, we are committed to creating new core industries based on these foundations. As the globalization of the automotive industry progresses, we have expanded our production and sales bases not only in the United States, Thailand, and China but also newly into India, Indonesia, and Mexico. We aim to enhance customer support at our sales bases in France, Germany, and South Korea, while also strengthening our overseas network, including technical partnerships in Taiwan, Thailand, Indonesia, and India, as we strive to become a true global company.
