管道公称直径与对应外径是多少个毫米? 管道公称直径 与对应外径是多少个毫米?比如DN40 外径是X...

\u76f4\u5f84250\u58c1\u539a14\u94a2\u7ba1\u7684\u5916\u5f84\u548c\u5185\u5f84\u5206\u522b\u662f\u591a\u5c11\u6beb\u7c73

\u76f4\u5f84250\u58c1\u539a14\u94a2\u7ba1\u7684\u5916\u5f84273mm\uff1b\u5185\u5f84273-14*2=245mm\u3002

\u516c\u79f0\u76f4\u5f84\u662f\u63a5\u8fd1\u4e8e\u5185\u5f84\uff0c\u4f46\u662f\u53c8\u4e0d\u7b49\u4e8e\u5185\u5f84\u7684\u4e00\u79cd\u7ba1\u5b50\u76f4\u5f84\u7684\u89c4\u683c\u540d\u79f0,\u5927\u81f4\u662f\u516c\u79f0\u76f4\u5f84\u5927\u7ea6\u7b49\u4e8e\u5185\u5f84\uff08\u5916\u5f84\u51cf\u4e24\u4e2a\u76ae\u539a\uff09\u4f46\u4e5f\u4e0d\u5b8c\u5168\u76f8\u7b49\uff0c\u5927\u81f4\u5dee\u4e0d\u591a\uff0c\u53d6\u6574\u5c31\u884c\u3002
DN15-\u044418mm\uff0cDN20-\u044425mm

DN25-\u044432mm\uff0cDN32-\u044438mm

DN40-\u044445mm\uff0cDN50-\u044457mm

DN65-\u044473mm\uff0cDN80-\u044489mm

DN100-\u0444108mm\uff0cDN125-\u0444133mm

DN150-\u0444159mm\uff0cDN200-\u0444219mm

DN250-\u0444273mm\uff0cDN300-\u0444325mm

DN350-\u0444377mm\uff0cDN400-\u0444426mm

DN450-\u0444480mm\uff0cDN500-\u0444530mm

DN600-\u0444630mm

公称直径是接近于内径,但是又不等于内径的一种管子直径的规格名称,大致是公称直径大约等于内径(外径减两个皮厚)但也不完全相等,大致差不多,取整就行。
DN15-ф18mm,DN20-ф25mm

DN25-ф32mm,DN32-ф38mm

DN40-ф45mm,DN50-ф57mm

DN65-ф73mm,DN80-ф89mm

DN100-ф108mm,DN125-ф133mm

DN150-ф159mm,DN200-ф219mm

DN250-ф273mm,DN300-ф325mm

DN350-ф377mm,DN400-ф426mm

DN450-ф480mm,DN500-ф530mm

DN600-ф630mm

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