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English Translations » 【管道阀门技术圈】 » Is the nominal diameter corresponding to 1/8 inch DN3 or DN6

Is the nominal diameter corresponding to 1/8 inch DN3 or DN6?

2019-01-31View Original

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Is the nominal diameter corresponding to 1/8 inch DN3 or DN6? I always thought it was DN6. . . I saw DN3 written in the specification. Is this specification wrong or is DN3 only applicable to this specification? The specification is JB/T7747-2010
Reply #22019-01-31
Is this wrong? DN8 is missing.
Reply #32019-01-31
It should refer to the nominal diameter of the valve.
Reply #42019-01-31
1/8=DN6 1/4=DN8 3/8=DN10
Reply #52019-02-02
In fact, there is no contradiction, because 1/8 is very special. Among the dimensions and weights of ASME36.10 welded and seamless rolled steel pipes, there are two corresponding metric systems for 1/8 pairs, one DN6 and one DN3.
Reply #62019-02-02
1/8", DN 6 outer diameter 10.33mm refers to Pipe, ASMEB 36.10 36.19, etc. 1/8" outer diameter 3.18mm refers to Tube pipe, which is similar to the tube of instrument valve pneumatic pressure tube ASTM A213 a269 two different concepts

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Translated at 2026-07-26 13:59:22

Original: https://bbs.hcbbs.com/thread-2281280-1-1.html

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