镀锌钢管与焊接钢管中DN50-DN60-DN25-DN40表示什么意思
推荐回答(2个)
DN 表示管道的公称直径(公称通径)。镀锌钢管和焊接钢管的表示方法是一样的。
DN20 外径是26.75
DN25 外径是33.5
DN40 外径是48.0
DN50 外径是60.0
DN70 外径是75.5。
你好,DN 表示管道的公称直径(公称通径)。镀锌钢管和焊接钢管的表示方法是一样的。
DN20 外径是26.75
DN25 外径是33.5
DN40 外径是48.0
DN50 外径是60.0
DN70 外径是75.5
DN80 外径是88.5
DN100 外径是114.0
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