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目前,国产汽车管路系统均采用铜管。如果能用钢带卷制的铜焊双层管壁低碳钢管(简称双层卷焊钢管)代替铜管,则将为国家节约大量的铜。我厂用上海金属软管厂生产的φ8×0.75毫米双层卷焊钢管,在汽车供油系上使用,作了工艺和使用性能试验,试验结果表明,双层卷焊钢管基本上能满足要求,用来代替铜管是可行的。一双层卷焊钢管的特性双层卷焊钢管是用双面镀铜的低碳钢带,连续搭卷两圈后,构成双层管壁,用铜焊合而成。尺寸精确、公差小、壁厚一致、内、外表面清洁光滑,是一种精密的管材。
At present, domestic automobile piping systems are made of brass. If we can use steel strip rolled double-wall brazed double-wall low carbon steel pipe (referred to as double-rolled steel pipe) instead of brass, it will save a lot of copper for the country. I plant with the Shanghai metal hose factory production φ8 × 0.75 mm double-rolled steel pipe, used in automotive fuel supply system, made the process and performance tests, the test results show that double-coil welded steel pipe basically meet the requirements , Used to replace copper pipe is feasible. Characteristics of a double-layer welded steel pipe Double-rolled steel pipe is double-sided copper-plated low-carbon steel strip, take two consecutive laps, the double pipe wall, made of brazed together. Accurate size, small tolerance, consistent wall thickness, inner and outer surface clean and smooth, is a precision pipe.