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DN12等于多少毫米
更新时间: 2020-07-09 00:00:00  

平均直径1200毫米容器的公称直径标记为DN1200。

公称直径:又称平均外径。指标准化以后的标准直径,为内径和外径之间的中点,以DN表示,单位毫米。

压力直径:用钢板卷焊制成的筒体,其公称直径指的是内径。若容器直径较小,筒体可直接采用无缝钢管制作。此时,公称直径指钢管外径。

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