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阀门是PN64,法兰是PN63,为什么?

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发表于 2020-11-27 16:47:06 | 显示全部楼层 |阅读模式
阀门Z41W-64R,配套的管法兰是PN63的压力等级,按照对阀门型号的解读,应该是64公斤压力的,但为什么不是配套64公斤的法兰呢?查了一下HG20592,GB9113,GB9131,都没发现有PN64的法兰,那么,这个PN64的阀门怎么来的?有人了解过这些来历吗?另外,现场的PN63法兰确实能配上PN64的阀门。

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发表于 2020-11-27 16:47:59 | 显示全部楼层
阀门压力命名或者选取一般比相应的管道压力等级持平或者稍高,只要阀门配对的法兰与管法兰对的上就没问题。
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发表于 2020-11-27 16:53:39 | 显示全部楼层
两种习惯,一种是PN64,一种是PN63,以前用64的多,现在一般用63,没什么问题的,公称压力仅是一种概念性的东西,不要纠结于这类问题。
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发表于 2020-11-27 17:01:13 | 显示全部楼层
绝压和表压差别命名造成,其实是一个等级标准。
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 楼主| 发表于 2020-11-27 17:02:02 | 显示全部楼层
maureen 发表于 2020-11-27 16:53
两种习惯,一种是PN64,一种是PN63,以前用64的多,现在一般用63,没什么问题的,公称压力仅是一种概念性的 ...

谢谢楼主的回答,问了一下,说PN64是很早就出现的一个等级,PN63是后来才出现的,估计是替代PN64的,因有些标准是沿用了PN64没有改过来,所以造成了现有两个等级并用的现象,但后面化工出的标准都统一为PN63了,所以查不到。可以说,PN64和PN63是同一个压力等级。
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发表于 2020-11-27 17:02:42 | 显示全部楼层
没办法较真的事,你要把PN64的阀门上到PN16的法兰上才遇鬼了呢!
公称压力命名的差别!各有各习惯!
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发表于 2020-11-27 17:03:18 | 显示全部楼层
应该就是同一个标准,都按照64压力的来
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发表于 2020-11-27 17:03:39 | 显示全部楼层
一样的 我之前替换以前老阀门也发现PN64的铭牌 开始一脸懵逼 现在都是PN63了
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发表于 2021-1-8 18:11:15 | 显示全部楼层
阀门公称压力和法兰公称压力均来自 GB/T 1048
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发表于 2021-4-13 09:00:08 | 显示全部楼层
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