在工厂工作时,你可留意过管道上的标识和色彩吗?它的颜色可有什么讲究?宽度、样式可有要求?DN、Φ、D又有什么关系? 附工业管道涂颜色和注字规定表
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3/4"=DN20
1-1/4"=DN32
1-1/2"=DN40
2-1/2"=DN65
3-1/2"=DN90
自己看一目了然,简单省事。