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芯棒拉拔管一股是指先电阻焊接后再在芯棒上冷拔的碳素钢管。它必须用厚度较为均匀的带钢成型和焊接。芯棒拉拔管典型的壁厚公差范围如下:对于8.128毫米以下的薄壁管为±0.127～±0.203毫米;对15.875毫米以下的厚壁管为±0.229～±0.406毫米。由于内径所留的精加工余量极小,因此均匀的壁厚和管子的同心度极为重要。冷拔能保证内外径尺寸公
Core rod drawing pipe refers to the first resistance welding and then drawing on the mandrel carbon steel tube. It must be formed and welded with more uniform strip thickness. Typical wall thickness tolerances for mandrel drawn tubes are as follows: ± 0.127 ± 0.203 mm for thin-walled tubes below 8.128 mm and ± 0.229 ± 0.406 mm for thick-walled tubes below 15.875 mm. Due to the minimal finishing allowance of the inner diameter, uniform wall thickness and tube concentricity are of paramount importance. Cold drawn to ensure that the size of male and female diameter